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# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
#
#-------------------------------------------------------------------------
#
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import math
import torch
import torch.nn as nn
import torch.nn.functional as F
from torch import Tensor
from typing import Optional, Dict
from fairseq.modules import (
LearnedPositionalEmbedding, MultiheadAttention, SinusoidalPositionalEmbedding
)
from . import (
FairseqIncrementalDecoder, register_model,
register_model_architecture,
)
from apex.normalization.fused_layer_norm import FusedLayerNorm
torch.set_printoptions(threshold=500000000, linewidth=1024)
@torch.jit.script
def jit_dropout_add(x, residual, prob, is_training):
# type: (Tensor, Tensor, float, bool) -> Tensor
out = F.dropout(x, p=prob, training=is_training)
out = residual + out
return out
@torch.jit.script
def jit_relu_dropout(x, prob, is_training):
# type: (Tensor, float, bool) -> Tensor
out = F.threshold(x, 0., 0.)
out = F.dropout(out, p=prob, training=is_training)
return out
@register_model('transformer')
class TransformerModel(nn.Module):
@staticmethod
def add_args(parser):
"""Add model-specific arguments to the parser."""
parser.add_argument('--dropout', type=float, metavar='D',
help='dropout probability')
parser.add_argument('--attention-dropout', type=float, metavar='D',
help='dropout probability for attention weights')
parser.add_argument('--relu-dropout', type=float, metavar='D',
help='dropout probability after ReLU in FFN')
parser.add_argument('--encoder-embed-path', type=str, metavar='STR',
help='path to pre-trained encoder embedding')
parser.add_argument('--encoder-embed-dim', type=int, metavar='N',
help='encoder embedding dimension')
parser.add_argument('--encoder-ffn-embed-dim', type=int, metavar='N',
help='encoder embedding dimension for FFN')
parser.add_argument('--encoder-layers', type=int, metavar='N',
help='num encoder layers')
parser.add_argument('--encoder-attention-heads', type=int, metavar='N',
help='num encoder attention heads')
parser.add_argument('--encoder-normalize-before', action='store_true',
help='apply layernorm before each encoder block')
parser.add_argument('--encoder-learned-pos', action='store_true',
help='use learned positional embeddings in the encoder')
parser.add_argument('--decoder-embed-path', type=str, metavar='STR',
help='path to pre-trained decoder embedding')
parser.add_argument('--decoder-embed-dim', type=int, metavar='N',
help='decoder embedding dimension')
parser.add_argument('--decoder-ffn-embed-dim', type=int, metavar='N',
help='decoder embedding dimension for FFN')
parser.add_argument('--decoder-layers', type=int, metavar='N',
help='num decoder layers')
parser.add_argument('--decoder-attention-heads', type=int, metavar='N',
help='num decoder attention heads')
parser.add_argument('--decoder-learned-pos', action='store_true',
help='use learned positional embeddings in the decoder')
parser.add_argument('--decoder-normalize-before', action='store_true',
help='apply layernorm before each decoder block')
parser.add_argument('--share-decoder-input-output-embed', action='store_true',
help='share decoder input and output embeddings')
parser.add_argument('--share-all-embeddings', action='store_true',
help='share encoder, decoder and output embeddings'
' (requires shared dictionary and embed dim)')
def __init__(self, encoder, decoder):
super().__init__()
self._is_generation_fast = False
self.encoder = encoder
self.decoder = decoder
@classmethod
def build_model(cls, args):
# make sure all arguments are present in older models
base_architecture(args)
if not hasattr(args, 'max_source_positions'):
args.max_source_positions = 1024
if not hasattr(args, 'max_target_positions'):
args.max_target_positions = 1024
if args.share_all_embeddings:
if args.src_vocab_size != args.tgt_vocab_size:
raise RuntimeError('--share-all-embeddings requires a joined dictionary')
if args.encoder_embed_dim != args.decoder_embed_dim:
raise RuntimeError(
'--share-all-embeddings requires --encoder-embed-dim to match --decoder-embed-dim')
if args.decoder_embed_path and (
args.decoder_embed_path != args.encoder_embed_path):
raise RuntimeError('--share-all-embeddings not compatible with --decoder-embed-path')
encoder_embed_tokens = Embedding(args.src_vocab_size, args.encoder_embed_dim, args.padding_idx)
decoder_embed_tokens = encoder_embed_tokens
args.share_decoder_input_output_embed = True
else:
encoder_embed_tokens = Embedding(args.src_vocab_size, args.encoder_embed_dim, args.padding_idx)
decoder_embed_tokens = Embedding(args.tgt_vocab_size, args.decoder_embed_dim, args.padding_idx)
encoder = TransformerEncoder(args, encoder_embed_tokens)
decoder = TransformerDecoder(args, decoder_embed_tokens)
return TransformerModel(encoder, decoder)
def make_generation_fast_(self, **kwargs):
"""Optimize model for faster generation."""
if self._is_generation_fast:
return # only apply once
self._is_generation_fast = True
# remove weight norm from all modules in the network
def apply_remove_weight_norm(module):
try:
nn.utils.remove_weight_norm(module)
except ValueError: # this module didn't have weight norm
return
self.apply(apply_remove_weight_norm)
def apply_make_generation_fast_(module):
if module != self and hasattr(module, 'make_generation_fast_'):
module.make_generation_fast_(**kwargs)
self.apply(apply_make_generation_fast_)
def train(mode):
if mode:
raise RuntimeError('cannot train after make_generation_fast')
# this model should no longer be used for training
self.eval()
self.train = train
def forward(self, src_tokens, src_lengths, prev_output_tokens):
encoder_out, padding_mask = self.encoder(src_tokens, src_lengths)
decoder_out = self.decoder(prev_output_tokens, encoder_out, padding_mask)
return decoder_out
class TransformerEncoder(nn.Module):
"""Transformer encoder."""
def __init__(self, args, embed_tokens, left_pad=True):
super().__init__()
self.dropout = args.dropout
self.fuse_dropout_add = args.fuse_dropout_add
self.fuse_relu_dropout = args.fuse_relu_dropout
embed_dim = embed_tokens.embedding_dim
self.padding_idx = embed_tokens.padding_idx
self.max_source_positions = args.max_source_positions
self.embed_tokens = embed_tokens
self.embed_scale = math.sqrt(embed_dim)
self.embed_positions = PositionalEmbedding(
args.max_source_positions, embed_dim, self.padding_idx,
left_pad=left_pad,
learned=args.encoder_learned_pos,
) if not args.no_token_positional_embeddings else None
self.layers = nn.ModuleList([])
self.layers.extend([
TransformerEncoderLayer(args)
for i in range(args.encoder_layers)
])
self.normalize = args.encoder_normalize_before
if self.normalize:
self.layer_norm = FusedLayerNorm(embed_dim) if args.fuse_layer_norm else nn.LayerNorm(embed_dim)
def forward(self, src_tokens, src_lengths):
# embed tokens and positions
x = self.embed_scale * self.embed_tokens(src_tokens)
if self.embed_positions is not None:
x += self.embed_positions(src_tokens)
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
# The tensor needs to copy transposed because
# fused dropout is not capable of handing strided data
if self.fuse_dropout_add:
x = x.transpose(0, 1).contiguous()
else:
x = x.transpose(0, 1)
# compute padding mask
encoder_padding_mask = src_tokens.eq(self.padding_idx)
if not encoder_padding_mask.any():
_encoder_padding_mask = None
else:
_encoder_padding_mask = encoder_padding_mask
# encoder layers
for layer in self.layers:
x = layer(x, _encoder_padding_mask)
if self.normalize:
x = self.layer_norm(x)
return x, encoder_padding_mask # x.shape == T x B x C, encoder_padding_mask.shape == B x T
def reorder_encoder_out(self, encoder_out, encoder_padding_mask, new_order):
if encoder_out is not None:
encoder_out = encoder_out.index_select(1, new_order)
if encoder_padding_mask is not None:
encoder_padding_mask = encoder_padding_mask.index_select(0, new_order)
return encoder_out, encoder_padding_mask
class TransformerDecoder(FairseqIncrementalDecoder):
"""Transformer decoder."""
def __init__(self, args, embed_tokens, no_encoder_attn=False, left_pad=False):
super().__init__()
self.dropout = args.dropout
self.share_input_output_embed = args.share_decoder_input_output_embed
self.fuse_dropout_add = args.fuse_dropout_add
self.fuse_relu_dropout = args.fuse_relu_dropout
embed_dim = embed_tokens.embedding_dim
padding_idx = embed_tokens.padding_idx
self.max_target_positions = args.max_target_positions
self.embed_tokens = embed_tokens
self.embed_scale = math.sqrt(embed_dim)
self.embed_positions = PositionalEmbedding(
args.max_target_positions, embed_dim, padding_idx,
left_pad=left_pad,
learned=args.decoder_learned_pos,
) if not args.no_token_positional_embeddings else None
self.layers = nn.ModuleList([])
self.layers.extend([
TransformerDecoderLayer(args, no_encoder_attn)
for _ in range(args.decoder_layers)
])
if not self.share_input_output_embed:
self.embed_out = nn.Parameter(torch.Tensor(args.tgt_vocab_size, embed_dim))
nn.init.normal_(self.embed_out, mean=0, std=embed_dim ** -0.5)
else:
self.embed_out = self.embed_tokens.weight
self.normalize = args.decoder_normalize_before
if self.normalize:
self.layer_norm = FusedLayerNorm(embed_dim) if args.fuse_layer_norm else nn.LayerNorm(embed_dim)
def forward(self,
prev_output_tokens: Tensor,
encoder_out: Tensor,
encoder_padding_mask: Tensor,
incremental_state: Optional[Dict[str, Dict[str, Tensor]]]=None):
# embed positions
positions = self.embed_positions(
prev_output_tokens,
incremental_state=incremental_state,
) if self.embed_positions is not None else None
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:]
if positions is not None:
positions = positions[:, -1:]
# embed tokens and positions
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if positions is not None:
x += positions
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
# The tensor needs to copy transposed because
# fused dropout is not capable of handing strided data
if self.fuse_dropout_add:
x = x.transpose(0, 1).contiguous()
else:
x = x.transpose(0, 1)
attn = None
# decoder layers
for layer in self.layers:
x, attn = layer(
x,
encoder_out,
encoder_padding_mask if encoder_padding_mask.any() else None,
incremental_state,
)
if self.normalize:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
# project back to size of vocabulary
x = F.linear(x, self.embed_out)
return x, attn
class TransformerEncoderLayer(nn.Module):
"""Encoder layer block.
In the original paper each operation (multi-head attention or FFN) is
postprocessed with: dropout -> add residual -> layernorm.
In the tensor2tensor code they suggest that learning is more robust when
preprocessing each layer with layernorm and postprocessing with:
dropout -> add residual.
We default to the approach in the paper, but the tensor2tensor approach can
be enabled by setting `normalize_before=True`.
"""
def __init__(self, args):
super().__init__()
self.embed_dim = args.encoder_embed_dim
self.self_attn = MultiheadAttention(
self.embed_dim, args.encoder_attention_heads,
dropout=args.attention_dropout,
)
self.dropout = args.dropout
self.relu_dropout = args.relu_dropout
self.fuse_dropout_add = args.fuse_dropout_add
self.fuse_relu_dropout = args.fuse_relu_dropout
self.normalize_before = args.encoder_normalize_before
self.fc1 = Linear(self.embed_dim, args.encoder_ffn_embed_dim)
self.fc2 = Linear(args.encoder_ffn_embed_dim, self.embed_dim)
self.maybe_ln1 = MaybeLayerNorm(self.embed_dim, self.normalize_before, fuse=args.fuse_layer_norm)
self.maybe_ln2 = MaybeLayerNorm(self.embed_dim, self.normalize_before, fuse=args.fuse_layer_norm)
def forward(self, x: Tensor, encoder_padding_mask: Optional[Tensor]):
residual = x
x = self.maybe_ln1(x, before=True)
x, _ = self.self_attn(query=x, key=x, value=x,
mask_future_timesteps=False,
key_padding_mask=encoder_padding_mask,
incremental_state=None,
need_weights=False,
static_kv=False)
if self.fuse_dropout_add and self.training:
x = jit_dropout_add(x, residual, self.dropout, self.training)
else:
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_ln1(x, after=True)
residual = x
x = self.maybe_ln2(x, before=True)
if self.fuse_relu_dropout:
x = jit_relu_dropout(self.fc1(x), self.relu_dropout, self.training)
else:
x = F.threshold(self.fc1(x), 0.0, 0.0)
x = F.dropout(x, p=self.relu_dropout, training=self.training)
x = self.fc2(x)
if self.fuse_dropout_add and self.training:
x = jit_dropout_add(x, residual, self.dropout, self.training)
else:
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_ln2(x, after=True)
return x
class TransformerDecoderLayer(nn.Module):
"""Decoder layer block."""
def __init__(self, args, no_encoder_attn=False):
super().__init__()
self.embed_dim = args.decoder_embed_dim
self.self_attn = MultiheadAttention(
self.embed_dim, args.decoder_attention_heads,
dropout=args.attention_dropout,
)
self.dropout = args.dropout
self.relu_dropout = args.relu_dropout
self.normalize_before = args.decoder_normalize_before
self.fuse_dropout_add = args.fuse_dropout_add
self.fuse_relu_dropout = args.fuse_relu_dropout
self.self_attn_layer_norm = MaybeLayerNorm(
self.embed_dim, self.normalize_before, fuse=args.fuse_layer_norm)
if no_encoder_attn:
self.encoder_attn = None
self.encoder_attn_layer_norm = None
else:
self.encoder_attn = MultiheadAttention(
self.embed_dim, args.decoder_attention_heads,
dropout=args.attention_dropout,
)
self.encoder_attn_layer_norm = MaybeLayerNorm(
self.embed_dim, self.normalize_before, fuse=args.fuse_layer_norm)
self.fc1 = Linear(self.embed_dim, args.decoder_ffn_embed_dim)
self.fc2 = Linear(args.decoder_ffn_embed_dim, self.embed_dim)
self.final_layer_norm = MaybeLayerNorm(
self.embed_dim, self.normalize_before, fuse=args.fuse_layer_norm)
self.need_attn = True
def forward(self,
x: Tensor,
encoder_out: Tensor,
encoder_padding_mask: Optional[Tensor],
incremental_state: Optional[Dict[str, Dict[str, Tensor]]]):
residual = x
x = self.self_attn_layer_norm(x, before=True)
x, _ = self.self_attn(
query=x,
key=x,
value=x,
mask_future_timesteps=True,
key_padding_mask=None,
incremental_state=incremental_state,
need_weights=False,
static_kv=False
)
if self.fuse_dropout_add and self.training:
x = jit_dropout_add(x, residual, self.dropout, self.training)
else:
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.self_attn_layer_norm(x, after=True)
attn = None
if self.encoder_attn is not None:
residual = x
x = self.encoder_attn_layer_norm(x, before=True)
x, attn = self.encoder_attn(
query=x,
key=encoder_out,
value=encoder_out,
key_padding_mask=encoder_padding_mask,
incremental_state=incremental_state,
static_kv=True,
mask_future_timesteps=False,
need_weights=(not self.training and self.need_attn),
)
if self.fuse_dropout_add and self.training:
x = jit_dropout_add(x, residual, self.dropout, self.training)
else:
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.encoder_attn_layer_norm(x, after=True)
residual = x
x = self.final_layer_norm(x, before=True)
if self.fuse_relu_dropout:
x = jit_relu_dropout(self.fc1(x), self.relu_dropout, self.training)
else:
x = F.threshold(self.fc1(x), 0.0, 0.0)
x = F.dropout(x, p=self.relu_dropout, training=self.training)
x = self.fc2(x)
if self.fuse_dropout_add and self.training:
x = jit_dropout_add(x, residual, self.dropout, self.training)
else:
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.final_layer_norm(x, after=True)
return x, attn
def make_generation_fast_(self, need_attn=False, **kwargs):
self.need_attn = need_attn
def Embedding(num_embeddings, embedding_dim, padding_idx):
m = nn.Embedding(num_embeddings, embedding_dim, padding_idx=padding_idx)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
nn.init.constant_(m.weight[padding_idx], 0)
return m
class MaybeLayerNorm(nn.Module):
def __init__(self, embed_dim, normalize_before, fuse=True):
super().__init__()
self.embed_dim = embed_dim
self.normalize_before = normalize_before
self.ln = FusedLayerNorm(embed_dim) if fuse else nn.LayerNorm(embed_dim)
def forward(self, x: Tensor, before: bool = False, after: bool = False):
assert before ^ after
if after ^ self.normalize_before:
return self.ln(x)
else:
return x
def Linear(in_features, out_features, bias=True):
m = nn.Linear(in_features, out_features, bias)
nn.init.xavier_uniform_(m.weight)
nn.init.constant_(m.bias, 0.)
return m
def PositionalEmbedding(num_embeddings, embedding_dim, padding_idx, left_pad, learned=False):
if learned:
m = LearnedPositionalEmbedding(num_embeddings + padding_idx + 1, embedding_dim, padding_idx, left_pad)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
nn.init.constant_(m.weight[padding_idx], 0)
else:
m = SinusoidalPositionalEmbedding(
embedding_dim, padding_idx, left_pad, num_embeddings + padding_idx + 1)
return m
@register_model_architecture('transformer', 'transformer')
def base_architecture(args):
args.encoder_embed_path = getattr(args, 'encoder_embed_path', None)
args.encoder_embed_dim = getattr(args, 'encoder_embed_dim', 512)
args.encoder_ffn_embed_dim = getattr(args, 'encoder_ffn_embed_dim', 2048)
args.encoder_layers = getattr(args, 'encoder_layers', 6)
args.encoder_attention_heads = getattr(args, 'encoder_attention_heads', 8)
args.encoder_normalize_before = getattr(args, 'encoder_normalize_before', False)
args.encoder_learned_pos = getattr(args, 'encoder_learned_pos', False)
args.decoder_embed_path = getattr(args, 'decoder_embed_path', None)
args.decoder_embed_dim = getattr(args, 'decoder_embed_dim', args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(args, 'decoder_ffn_embed_dim', args.encoder_ffn_embed_dim)
args.decoder_layers = getattr(args, 'decoder_layers', 6)
args.decoder_attention_heads = getattr(args, 'decoder_attention_heads', 8)
args.decoder_normalize_before = getattr(args, 'decoder_normalize_before', False)
args.decoder_learned_pos = getattr(args, 'decoder_learned_pos', False)
args.attention_dropout = getattr(args, 'attention_dropout', 0.)
args.relu_dropout = getattr(args, 'relu_dropout', 0.)
args.dropout = getattr(args, 'dropout', 0.1)
args.share_decoder_input_output_embed = getattr(args, 'share_decoder_input_output_embed', False)
args.share_all_embeddings = getattr(args, 'share_all_embeddings', False)
args.no_token_positional_embeddings = getattr(args, 'no_token_positional_embeddings', False)
@register_model_architecture('transformer', 'transformer_iwslt_de_en')
def transformer_iwslt_de_en(args):
args.encoder_embed_dim = getattr(args, 'encoder_embed_dim', 512)
args.encoder_ffn_embed_dim = getattr(args, 'encoder_ffn_embed_dim', 1024)
args.encoder_attention_heads = getattr(args, 'encoder_attention_heads', 4)
args.encoder_layers = getattr(args, 'encoder_layers', 6)
args.decoder_embed_dim = getattr(args, 'decoder_embed_dim', 512)
args.decoder_ffn_embed_dim = getattr(args, 'decoder_ffn_embed_dim', 1024)
args.decoder_attention_heads = getattr(args, 'decoder_attention_heads', 4)
args.decoder_layers = getattr(args, 'decoder_layers', 6)
base_architecture(args)
@register_model_architecture('transformer', 'transformer_wmt_en_de')
def transformer_wmt_en_de(args):
base_architecture(args)
# parameters used in the "Attention Is All You Need" paper (Vaswani, et al, 2017)
@register_model_architecture('transformer', 'transformer_vaswani_wmt_en_de_big')
def transformer_vaswani_wmt_en_de_big(args):
args.encoder_embed_dim = getattr(args, 'encoder_embed_dim', 1024)
args.encoder_ffn_embed_dim = getattr(args, 'encoder_ffn_embed_dim', 4096)
args.encoder_attention_heads = getattr(args, 'encoder_attention_heads', 16)
args.encoder_normalize_before = getattr(args, 'encoder_normalize_before', False)
args.decoder_embed_dim = getattr(args, 'decoder_embed_dim', 1024)
args.decoder_ffn_embed_dim = getattr(args, 'decoder_ffn_embed_dim', 4096)
args.decoder_attention_heads = getattr(args, 'decoder_attention_heads', 16)
args.dropout = getattr(args, 'dropout', 0.3)
base_architecture(args)
@register_model_architecture('transformer', 'transformer_vaswani_wmt_en_fr_big')
def transformer_vaswani_wmt_en_fr_big(args):
args.dropout = getattr(args, 'dropout', 0.1)
transformer_vaswani_wmt_en_de_big(args)
@register_model_architecture('transformer', 'transformer_wmt_en_de_big')
def transformer_wmt_en_de_big(args):
args.attention_dropout = getattr(args, 'attention_dropout', 0.1)
transformer_vaswani_wmt_en_de_big(args)
# default parameters used in tensor2tensor implementation
@register_model_architecture('transformer', 'transformer_wmt_en_de_big_t2t')
def transformer_wmt_en_de_big_t2t(args):
args.encoder_normalize_before = getattr(args, 'encoder_normalize_before', True)
args.decoder_normalize_before = getattr(args, 'decoder_normalize_before', True)
args.attention_dropout = getattr(args, 'attention_dropout', 0.1)
args.relu_dropout = getattr(args, 'relu_dropout', 0.1)
transformer_vaswani_wmt_en_de_big(args)
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/models/transformer.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
import torch.nn as nn
class FairseqIncrementalDecoder(nn.Module):
"""Base class for incremental decoders."""
def __init__(self):
super().__init__()
def forward(self, prev_output_tokens, encoder_out, incremental_state=None):
raise NotImplementedError
def reorder_incremental_state(self, incremental_state, new_order):
"""Reorder incremental state.
This should be called when the order of the input has changed from the
previous time step. A typical use case is beam search, where the input
order changes between time steps based on the selection of beams.
"""
def apply_reorder_incremental_state(module):
if module != self and hasattr(module, 'reorder_incremental_state'):
module.reorder_incremental_state(
incremental_state,
new_order,
)
self.apply(apply_reorder_incremental_state)
def set_beam_size(self, beam_size):
"""Sets the beam size in the decoder and all children."""
if getattr(self, '_beam_size', -1) != beam_size:
def apply_set_beam_size(module):
if module != self and hasattr(module, 'set_beam_size'):
module.set_beam_size(beam_size)
self.apply(apply_set_beam_size)
self._beam_size = beam_size
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/models/fairseq_incremental_decoder.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
import torch
import torch.nn as nn
class BeamableMM(nn.Module):
"""This module provides an optimized MM for beam decoding with attention.
It leverage the fact that the source-side of the input is replicated beam
times and the target-side of the input is of width one. This layer speeds up
inference by replacing the inputs {(bsz x 1 x nhu), (bsz x sz2 x nhu)}
with smaller inputs {(bsz/beam x beam x nhu), (bsz/beam x sz2 x nhu)}.
"""
def __init__(self, beam_size=None):
super(BeamableMM, self).__init__()
self.beam_size = beam_size
def forward(self, input1, input2):
if (
not self.training and # test mode
self.beam_size is not None and # beam size is set
input1.dim() == 3 and # only support batched input
input1.size(1) == 1 # single time step update
):
bsz, beam = input1.size(0), self.beam_size
# bsz x 1 x nhu --> bsz/beam x beam x nhu
input1 = input1[:, 0, :].unfold(0, beam, beam).transpose(2, 1)
# bsz x sz2 x nhu --> bsz/beam x sz2 x nhu
input2 = input2.unfold(0, beam, beam)[:, :, :, 0]
# use non batched operation if bsz = beam
if input1.size(0) == 1:
output = torch.mm(input1[0, :, :], input2[0, :, :])
else:
output = input1.bmm(input2)
return output.view(bsz, 1, -1)
else:
return input1.bmm(input2)
def set_beam_size(self, beam_size):
self.beam_size = beam_size
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/modules/beamable_mm.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
#
#-------------------------------------------------------------------------
#
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Dict, Optional
import torch
from torch import nn, Tensor
from torch.nn import Parameter
import torch.nn.functional as F
from torch.cuda import amp
from torch.autograd.variable import Variable
import strided_batched_gemm
from fairseq import utils
class QueryLinear(torch.autograd.Function):
@staticmethod
@amp.custom_fwd(cast_inputs=torch.half)
def forward(ctx, input, weights_q, scale):
s = Variable(torch.tensor([scale]))
ctx.save_for_backward(input, weights_q, s)
q = torch.addmm(input.view(input.size(0) * input.size(1), input.size(2)),
input.view(input.size(0) * input.size(1), input.size(2)),
weights_q, beta=0.0, alpha=s[0])
q = q.view(input.size(0), input.size(1), input.size(2))
return q.detach()
@staticmethod
@amp.custom_bwd
def backward(ctx, q_grad):
input, weights_q, s = ctx.saved_tensors
input = input.view(input.size(0) * input.size(1), input.size(2)).transpose(0, 1)
q = torch.addmm(q_grad.view(q_grad.size(0) * q_grad.size(1), q_grad.size(2)),
q_grad.view(q_grad.size(0) * q_grad.size(1), q_grad.size(2)),
weights_q.transpose(0, 1), beta=0.0, alpha=s[0])
q = q.view(q_grad.size(0), q_grad.size(1), q_grad.size(2))
q_grad = q_grad.view(q_grad.size(0) * q_grad.size(1), q_grad.size(2))
weights_q_grad = torch.addmm(weights_q, input, q_grad, beta=0.0, alpha=s[0])
return q, weights_q_grad, None
class KeyValueLinears(torch.autograd.Function):
@staticmethod
@amp.custom_fwd(cast_inputs=torch.half)
def forward(ctx, input, weights_k, weights_v):
ctx.save_for_backward(input, weights_k, weights_v)
k = torch.addmm(input.view(input.size(0) * input.size(1), input.size(2)),
input.view(input.size(0) * input.size(1), input.size(2)),
weights_k, beta=0.0, alpha=1.0)
k = k.view(input.size(0), input.size(1), input.size(2))
v = torch.addmm(input.view(input.size(0) * input.size(1), input.size(2)),
input.view(input.size(0) * input.size(1), input.size(2)),
weights_v, beta=0.0, alpha=1.0)
v = v.view(input.size(0), input.size(1), input.size(2))
return k.detach(), v.detach()
@staticmethod
@amp.custom_bwd
def backward(ctx, k_grad, v_grad):
input, weights_k, weights_v = ctx.saved_tensors
input = input.view(input.size(0) * input.size(1), input.size(2)).transpose(0, 1)
k = torch.addmm(k_grad.view(k_grad.size(0) * k_grad.size(1), k_grad.size(2)),
k_grad.view(k_grad.size(0) * k_grad.size(1), k_grad.size(2)),
weights_k.transpose(0, 1), beta=0.0)
k_grad = k_grad.view(k_grad.size(0) * k_grad.size(1), k_grad.size(2))
weights_k_grad = torch.mm(input, k_grad)
v = k.addmm_(v_grad.view(v_grad.size(0) * v_grad.size(1), v_grad.size(2)),
weights_v.transpose(0, 1), beta=1.0)
v = v.view(v_grad.size(0), v_grad.size(1), v_grad.size(2))
v_grad = v_grad.view(v_grad.size(0) * v_grad.size(1), v_grad.size(2))
weights_v_grad = torch.mm(input, v_grad)
return v, weights_k_grad, weights_v_grad
class SelfAttentionLinears(torch.autograd.Function):
@staticmethod
@amp.custom_fwd(cast_inputs=torch.half)
def forward(ctx, input, weights_q, weights_k, weights_v, scale):
s = Variable(torch.tensor([scale]))
ctx.save_for_backward(input, weights_q, weights_k, weights_v, s)
q = torch.addmm(input.view(input.size(0) * input.size(1), input.size(2)),
input.view(input.size(0) * input.size(1), input.size(2)),
weights_q, beta=0.0, alpha=s[0])
q = q.view(input.size(0), input.size(1), input.size(2))
k = torch.addmm(input.view(input.size(0) * input.size(1), input.size(2)),
input.view(input.size(0) * input.size(1), input.size(2)),
weights_k, beta=0.0, alpha=1.0)
k = k.view(input.size(0), input.size(1), input.size(2))
v = torch.addmm(input.view(input.size(0) * input.size(1), input.size(2)),
input.view(input.size(0) * input.size(1), input.size(2)),
weights_v, beta=0.0, alpha=1.0)
v = v.view(input.size(0), input.size(1), input.size(2))
return q.detach(), k.detach(), v.detach()
@staticmethod
@amp.custom_bwd
def backward(ctx, q_grad, k_grad, v_grad):
input, weights_q, weights_k, weights_v, s = ctx.saved_tensors
input = input.view(input.size(0) * input.size(1), input.size(2)).transpose(0, 1)
q = torch.addmm(q_grad.view(q_grad.size(0) * q_grad.size(1), q_grad.size(2)),
q_grad.view(q_grad.size(0) * q_grad.size(1), q_grad.size(2)),
weights_q.transpose(0, 1), beta=0.0, alpha=s[0])
q_grad = q_grad.view(q_grad.size(0) * q_grad.size(1), q_grad.size(2))
weights_q_grad = torch.addmm(weights_q, input, q_grad, beta=0.0, alpha=s[0])
k = q.addmm_(k_grad.view(k_grad.size(0) * k_grad.size(1), k_grad.size(2)),
weights_k.transpose(0, 1), beta=1.0)
k_grad = k_grad.view(k_grad.size(0) * k_grad.size(1), k_grad.size(2))
weights_k_grad = torch.mm(input, k_grad)
v = k.addmm_(v_grad.view(v_grad.size(0) * v_grad.size(1), v_grad.size(2)),
weights_v.transpose(0, 1), beta=1.0)
v = v.view(v_grad.size(0), v_grad.size(1), v_grad.size(2))
v_grad = v_grad.view(v_grad.size(0) * v_grad.size(1), v_grad.size(2))
weights_v_grad = torch.mm(input, v_grad)
return v, weights_q_grad, weights_k_grad, weights_v_grad, None
class StridedBmm1Func(torch.autograd.Function):
@staticmethod
@amp.custom_fwd(cast_inputs=torch.half)
def forward(ctx, input1, input2):
ctx.save_for_backward(input1, input2)
output = torch.empty((input1.size(0), input1.size(1), input2.size(2)),
dtype=input1.dtype, device=torch.device('cuda'))
if (input1.dtype == torch.float16) and (input2.dtype == torch.float16):
output = strided_batched_gemm.strided_batched_gemm(0.0, output, 1.0, input1, input2)
else:
output = torch.bmm(input1, input2, out=output)
return output.detach()
@staticmethod
@amp.custom_bwd
def backward(ctx, grad_output):
input1, input2 = ctx.saved_tensors
grad_input1 = torch.empty((input1.size(1), input2.size(0), input1.size(2)),
dtype=input1.dtype, device=torch.device('cuda')).transpose(1, 0)
grad_input2 = torch.empty((input2.size(2), input2.size(0), input2.size(1)),
dtype=input2.dtype, device=torch.device('cuda')).transpose(1, 0)
if (grad_output.dtype == torch.float16) and (input1.dtype == torch.float16) and (input2.dtype == torch.float16):
grad_input1 = strided_batched_gemm.strided_batched_gemm(0.0, grad_input1,
1.0, grad_output,
input2.transpose(1, 2))
grad_input2 = strided_batched_gemm.strided_batched_gemm(0.0, grad_input2,
1.0, grad_output.transpose(1, 2),
input1)
grad_input2 = grad_input2.transpose(1, 2)
else:
grad_input1 = torch.bmm(grad_output, input2.transpose(1, 2), out=grad_input1)
grad_input2 = torch.bmm(grad_output.transpose(1, 2), input1, out=grad_input2).transpose(1, 2)
return grad_input1, grad_input2
class StridedBmm2Func(torch.autograd.Function):
@staticmethod
@amp.custom_fwd(cast_inputs=torch.half)
def forward(ctx, input1, input2):
ctx.save_for_backward(input1, input2)
output = torch.empty((input1.size(1), input1.size(0), input2.size(2)),
dtype=input1.dtype, device=torch.device('cuda')).transpose(1, 0)
if (input1.dtype == torch.float16) and (input2.dtype == torch.float16):
output = strided_batched_gemm.strided_batched_gemm(0.0, output, 1.0, input1, input2)
else:
output = torch.bmm(input1, input2, out=output)
return output.detach()
@staticmethod
@amp.custom_bwd
def backward(ctx, grad_output):
input1, input2 = ctx.saved_tensors
grad_input2 = torch.empty((input2.size(1), input2.size(0), input2.size(2)),
dtype=input2.dtype, device=torch.device('cuda')).transpose(1, 0)
grad_input1 = torch.empty((input1.size(0), input1.size(1), input1.size(2)),
dtype=input2.dtype, device=torch.device('cuda'))
if (grad_output.dtype == torch.float16) and (input1.dtype == torch.float16) and (input2.dtype == torch.float16):
grad_input1 = strided_batched_gemm.strided_batched_gemm(0.0, grad_input1,
1.0, grad_output,
input2.transpose(1, 2))
grad_input2 = strided_batched_gemm.strided_batched_gemm(0.0, grad_input2,
1.0, input1.transpose(1, 2),
grad_output)
else:
grad_input1 = torch.bmm(grad_output, input2.transpose(1, 2))
grad_input2 = torch.bmm(input1.transpose(1, 2), grad_output, out=grad_input2)
return grad_input1, grad_input2
def query_linear(input: Tensor, weights_q: Tensor, scale: float):
if not torch.jit.is_scripting():
return QueryLinear.apply(input, weights_q, scale)
else:
q = scale * torch.einsum('ij,jk->ik', input.view(input.size(0) * input.size(1), -1), weights_q)
q = q.view(input.shape)
return q
def key_value_linears(input: Tensor, weights_k: Tensor, weights_v: Tensor):
if not torch.jit.is_scripting():
return KeyValueLinears.apply(input, weights_k, weights_v)
else:
k = torch.einsum('ij,jk->ik', input.view(input.size(0) * input.size(1), -1), weights_k)
k = k.view(input.shape)
v = torch.einsum('ij,jk->ik', input.view(input.size(0) * input.size(1), -1), weights_v)
v = v.view(input.shape)
return k, v
def self_attn_linears(input: Tensor, weights_q: Tensor, weights_k: Tensor, weights_v: Tensor, scale: float):
if not torch.jit.is_scripting():
return SelfAttentionLinears.apply(input, weights_q, weights_k, weights_v, scale)
else:
q = scale * torch.einsum('ij,jk->ik', input.view(input.size(0) * input.size(1), -1), weights_q)
q = q.view(input.shape)
k = torch.einsum('ij,jk->ik', input.view(input.size(0) * input.size(1), -1), weights_k)
k = k.view(input.shape)
v = torch.einsum('ij,jk->ik', input.view(input.size(0) * input.size(1), -1), weights_v)
v = v.view(input.shape)
return q, k, v
def strided_bmm1(input1: Tensor, input2: Tensor):
if not torch.jit.is_scripting():
return StridedBmm1Func.apply(input1, input2)
else:
return torch.einsum('ijk,ikn->ijn', input1, input2)
def strided_bmm2(input1: Tensor, input2: Tensor):
if not torch.jit.is_scripting():
return StridedBmm2Func.apply(input1, input2)
else:
return torch.einsum('ijk,ikn->ijn', input1, input2)
class MultiheadAttention(nn.Module):
"""Multi-headed attention.
See "Attention Is All You Need" for more details.
"""
def __init__(self, embed_dim, num_heads, dropout=0., bias=False):
super().__init__()
self.embed_dim = embed_dim
self.num_heads = num_heads
self.dropout = dropout
self.head_dim = embed_dim // num_heads
assert self.head_dim * num_heads == self.embed_dim, "embed_dim must be divisible by num_heads"
self.scaling = self.head_dim**-0.5
self._mask = torch.empty(0)
#self.in_proj_weight = Parameter(torch.Tensor(3*embed_dim, embed_dim))
self.in_proj_weight_q = Parameter(torch.Tensor(embed_dim, embed_dim))
self.in_proj_weight_k = Parameter(torch.Tensor(embed_dim, embed_dim))
self.in_proj_weight_v = Parameter(torch.Tensor(embed_dim, embed_dim))
if bias:
#self.in_proj_bias = Parameter(torch.Tensor(3*embed_dim))
self.in_proj_bias_q = Parameter(torch.Tensor(embed_dim))
self.in_proj_bias_k = Parameter(torch.Tensor(embed_dim))
self.in_proj_bias_v = Parameter(torch.Tensor(embed_dim))
else:
#self.register_parameter('in_proj_bias', None)
self.register_parameter('in_proj_bias_k', None)
self.register_parameter('in_proj_bias_q', None)
self.register_parameter('in_proj_bias_v', None)
self.out_proj = nn.Linear(embed_dim, embed_dim, bias=bias)
self.cache_id = str(id(self))
self.reset_parameters()
def reset_parameters(self):
#nn.init.xavier_uniform_(self.in_proj_weight)
nn.init.xavier_uniform_(self.in_proj_weight_q)
nn.init.xavier_uniform_(self.in_proj_weight_k)
nn.init.xavier_uniform_(self.in_proj_weight_v)
nn.init.xavier_uniform_(self.out_proj.weight)
if self.in_proj_bias_k is not None:
#nn.init.constant_(self.in_proj_bias, 0.)
nn.init.constant_(self.in_proj_bias_q, 0.)
nn.init.constant_(self.in_proj_bias_k, 0.)
nn.init.constant_(self.in_proj_bias_v, 0.)
nn.init.constant_(self.out_proj.bias, 0.)
def forward(self, query: Tensor, key: Tensor, value: Tensor,
mask_future_timesteps: bool,
key_padding_mask: Optional[Tensor],
incremental_state: Optional[Dict[str, Dict[str, Tensor]]],
need_weights: bool,
static_kv: bool):
"""Input shape: Time x Batch x Channel
Self-attention can be implemented by passing in the same arguments for
query, key and value. Future timesteps can be masked with the
`mask_future_timesteps` argument. Padding elements can be excluded from
the key by passing a binary ByteTensor (`key_padding_mask`) with shape:
batch x src_len, where padding elements are indicated by 1s.
"""
if torch.jit.is_scripting():
kv_same = torch.equal(key, value)
qkv_same = torch.equal(query, value) and kv_same
else:
qkv_same, kv_same = self._fast_same_check(query, key, value)
tgt_len, bsz, embed_dim = query.size()
assert embed_dim == self.embed_dim
assert list(query.size()) == [tgt_len, bsz, embed_dim]
assert key.size() == value.size()
k = v = query.new_empty(0)
if incremental_state is not None:
saved_state = self._get_input_buffer(incremental_state)
else:
saved_state = None
if qkv_same:
# self-attention
q, k, v = self_attn_linears(query, self.in_proj_weight_q,
self.in_proj_weight_k, self.in_proj_weight_v, self.scaling)
elif kv_same:
# encoder-decoder attention
q = query_linear(query, self.in_proj_weight_q, self.scaling)
if not(saved_state is not None and 'prev_key' in saved_state and static_kv):
k, v = key_value_linears(key, self.in_proj_weight_k, self.in_proj_weight_v)
else:
q = torch.addmm(query.view(query.size(0) * query.size(1),
query.size(2)), query.view(query.size(0) * query.size(1),
query.size(2)), self.in_proj_weight_q, beta=0.0, alpha=self.scaling)
if not(saved_state is not None and 'prev_key' in saved_state and static_kv):
k = F.linear(key, self.in_proj_weight_k, self.in_proj_bias_k)
v = F.linear(value, self.in_proj_weight_v, self.in_proj_bias_v)
if saved_state is not None:
if 'prev_key' in saved_state:
k = torch.cat((saved_state['prev_key'], k), dim=0)
if 'prev_value' in saved_state:
v = torch.cat((saved_state['prev_value'], v), dim=0)
saved_state['prev_key'] = k
saved_state['prev_value'] = v
self._set_input_buffer(incremental_state, saved_state)
src_len = k.size(0)
if key_padding_mask is not None:
assert key_padding_mask.size(0) == bsz
assert key_padding_mask.size(1) == src_len
q = q.contiguous().view(tgt_len, bsz * self.num_heads, self.head_dim).transpose(0, 1)
k = k.contiguous().view(src_len, bsz * self.num_heads, self.head_dim).transpose(0, 1)
v = v.contiguous().view(src_len, bsz * self.num_heads, self.head_dim).transpose(0, 1)
attn_weights = strided_bmm1(q, k.transpose(1, 2))
assert list(attn_weights.size()) == [bsz * self.num_heads, tgt_len, src_len]
# only apply masking at training time (when incremental state is None)
if mask_future_timesteps and incremental_state is None:
assert query.size() == key.size(), \
'mask_future_timesteps only applies to self-attention'
attn_weights += self.buffered_mask(attn_weights).unsqueeze(0)
if key_padding_mask is not None:
# don't attend to padding symbols
attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len)
attn_weights = attn_weights.float().masked_fill(
key_padding_mask.unsqueeze(1).unsqueeze(2),
float('-inf'),
).type_as(attn_weights) # FP16 support: cast to float and back
attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len)
attn_weights = F.softmax(attn_weights, dim=-1)
attn_weights = F.dropout(attn_weights, p=self.dropout, training=self.training)
attn = strided_bmm2(attn_weights, v)
assert list(attn.size()) == [bsz * self.num_heads, tgt_len, self.head_dim]
attn = attn.transpose(0, 1).contiguous().view(tgt_len, bsz, embed_dim)
attn = self.out_proj(attn)
if need_weights:
# average attention weights over heads
attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len)
attn_weights = attn_weights.sum(dim=1) / self.num_heads
else:
attn_weights = attn_weights.new_empty(0) # Can't set to None because jit script reasons
return attn, attn_weights
def in_proj_qkv(self, query):
return self._in_proj(query).chunk(3, dim=-1)
def in_proj_kv(self, key):
return self._in_proj(key, start=self.embed_dim).chunk(2, dim=-1)
def in_proj_q(self, query):
return self._in_proj(query, end=self.embed_dim)
def in_proj_k(self, key):
return self._in_proj(key, start=self.embed_dim, end=2 * self.embed_dim)
def in_proj_v(self, value):
return self._in_proj(value, start=2 * self.embed_dim)
def _in_proj(self, input, start=None, end=None):
weight = self.in_proj_weight
bias = self.in_proj_bias
if end is not None:
weight = weight[:end, :]
if bias is not None:
bias = bias[:end]
if start is not None:
weight = weight[start:, :]
if bias is not None:
bias = bias[start:]
return F.linear(input, weight, bias)
def buffered_mask(self, tensor):
dim = tensor.size(-1)
if self._mask.size(0) == 0:
#TODO: try torch.new_full instead
self._mask = torch.triu(utils.fill_with_neg_inf(tensor.new_empty(dim, dim)), 1)
if self._mask.size(0) < dim:
self._mask = torch.triu(utils.fill_with_neg_inf(self._mask.resize_(dim, dim)), 1)
return self._mask[:dim, :dim]
def reorder_incremental_state(self, incremental_state, new_order):
"""Reorder buffered internal state (for incremental generation)."""
input_buffer = self._get_input_buffer(incremental_state)
if input_buffer is not None:
for k in input_buffer.keys():
input_buffer[k] = input_buffer[k].index_select(1, new_order)
self._set_input_buffer(incremental_state, input_buffer)
def _get_input_buffer(self, incremental_state: Optional[Dict[str, Dict[str, Tensor]]]):
if incremental_state is None or self.cache_id not in incremental_state:
return {}
return incremental_state[self.cache_id]
def _set_input_buffer(self, incremental_state: Optional[Dict[str, Dict[str, Tensor]]],
buffer: Dict[str, Tensor]):
if incremental_state is not None:
incremental_state[self.cache_id] = buffer
@torch.jit.unused
def _fast_same_check(self, q, k, v):
qkv_same = q.data_ptr() == k.data_ptr() == v.data_ptr()
kv_same = k.data_ptr() == v.data_ptr()
return qkv_same, kv_same
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/modules/multihead_attention.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
import torch.nn as nn
from fairseq import utils
class LearnedPositionalEmbedding(nn.Embedding):
"""This module learns positional embeddings up to a fixed maximum size.
Padding symbols are ignored, but it is necessary to specify whether padding
is added on the left side (left_pad=True) or right side (left_pad=False).
"""
def __init__(self, num_embeddings, embedding_dim, padding_idx, left_pad):
super().__init__(num_embeddings, embedding_dim, padding_idx)
self.left_pad = left_pad
def forward(self, input, incremental_state=None):
"""Input is expected to be of size [bsz x seqlen]."""
if incremental_state is not None:
# positions is the same for every token when decoding a single step
positions = input.data.new(1, 1).fill_(self.padding_idx + input.size(1))
else:
positions = utils.make_positions(input.data, self.padding_idx, self.left_pad)
return super().forward(positions)
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/modules/learned_positional_embedding.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
from .beamable_mm import BeamableMM
from .learned_positional_embedding import LearnedPositionalEmbedding
from .multihead_attention import MultiheadAttention
from .sinusoidal_positional_embedding import SinusoidalPositionalEmbedding
__all__ = [
'BeamableMM',
'LearnedPositionalEmbedding',
'MultiheadAttention',
'SinusoidalPositionalEmbedding',
]
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/modules/__init__.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
import math
from typing import Optional, Dict
import torch
import torch.nn as nn
from torch import Tensor
class SinusoidalPositionalEmbedding(nn.Module):
"""This module produces sinusoidal positional embeddings of any length.
Padding symbols are ignored, but it is necessary to specify whether padding
is added on the left side (left_pad=True) or right side (left_pad=False).
"""
def __init__(self, embedding_dim, padding_idx, left_pad, init_size=1024):
super().__init__()
self.embedding_dim = embedding_dim
self.padding_idx = padding_idx
self.left_pad = left_pad
self.weights = SinusoidalPositionalEmbedding.get_embedding(
init_size,
embedding_dim,
padding_idx,
)
self.register_buffer('_float_tensor', torch.FloatTensor(1))
# JIT compliance
self.register_buffer(
'positions_buffer', torch.arange(padding_idx + 1, init_size + padding_idx + 1))
@staticmethod
def get_embedding(num_embeddings: int, embedding_dim: int, padding_idx: int):
"""Build sinusoidal embeddings.
This matches the implementation in tensor2tensor, but differs slightly
from the description in Section 3.5 of "Attention Is All You Need".
"""
half_dim = embedding_dim // 2
emb = math.log(10000) / (half_dim - 1)
emb = torch.exp(torch.arange(half_dim, dtype=torch.float) * -emb)
emb = torch.arange(num_embeddings, dtype=torch.float).unsqueeze(1) * emb.unsqueeze(0)
emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1).view(num_embeddings, -1)
if embedding_dim % 2 == 1:
# zero pad
emb = torch.cat([emb, torch.zeros(num_embeddings, 1)], dim=1)
emb[padding_idx] = torch.zeros(emb.shape[1]) # emb[padding_idx, :] = 0
return emb
def forward(self, input: Tensor, incremental_state: Optional[Dict[str, Dict[str, Tensor]]]=None):
"""Input is expected to be of size [bsz x seqlen]."""
# recompute/expand embeddings if needed
bsz, seq_len = input.size()
max_pos = self.padding_idx + 1 + seq_len
if self.weights is None or max_pos > self.weights.size(0):
self.weights = SinusoidalPositionalEmbedding.get_embedding(
max_pos,
self.embedding_dim,
self.padding_idx,
)
self.weights = self.weights.type_as(self._float_tensor)
if incremental_state is not None:
# positions is the same for every token when decoding a single step
return self.weights[self.padding_idx + seq_len, :].expand(bsz, 1, -1)
#### JIT ####
mask = input.ne(self.padding_idx)
positions = self.positions_buffer[:input.size(1)].expand_as(input)
if self.left_pad:
positions = positions - mask.size(1) + mask.long().sum(dim=1).unsqueeze(1)
positions = input.clone().masked_scatter_(mask, positions[mask])
#############
return self.weights.index_select(0, positions.view(-1)).view(bsz, seq_len, -1).detach()
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/modules/sinusoidal_positional_embedding.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
#
#-------------------------------------------------------------------------
#
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from .dictionary import Dictionary
from .indexed_dataset import IndexedDataset, IndexedInMemoryDataset, IndexedRawTextDataset # noqa: F401
from .language_pair_dataset import LanguagePairDataset, load_dataset_splits
from .data_utils import EpochBatchIterator
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/data/__init__.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
#
#-------------------------------------------------------------------------
#
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import contextlib
import itertools
import os
import numpy as np
import torch
import fairseq.data.batch_C
import sys
from .dictionary import Dictionary
def infer_language_pair(path):
"""Infer language pair from filename: <split>.<lang1>-<lang2>.(...).idx"""
src, dst = None, None
for filename in os.listdir(path):
parts = filename.split('.')
if len(parts) >= 3 and len(parts[1].split('-')) == 2:
return parts[1].split('-')
return src, dst
def load_dictionaries(args):
if args.source_lang is None or args.target_lang is None:
args.source_lang, args.target_lang = infer_language_pair(args.data)
if args.source_lang is None or args.target_lang is None:
raise Exception('Could not infer language pair, please provide it explicitly')
# load dictionaries
src_dict = Dictionary.load(os.path.join(args.data, 'dict.{}.txt'.format(args.source_lang)))
tgt_dict = Dictionary.load(os.path.join(args.data, 'dict.{}.txt'.format(args.target_lang)))
assert src_dict.pad() == tgt_dict.pad()
assert src_dict.eos() == tgt_dict.eos()
assert src_dict.unk() == tgt_dict.unk()
args.src_vocab_size = len(src_dict)
args.tgt_vocab_size = len(tgt_dict)
args.padding_idx = src_dict.pad()
print('| [{}] dictionary: {} types'.format(args.source_lang, len(src_dict)))
print('| [{}] dictionary: {} types'.format(args.target_lang, len(tgt_dict)))
return src_dict, tgt_dict
class ShardedIterator(object):
"""A sharded wrapper around an iterable (padded to length)."""
def __init__(self, iterable, num_shards, shard_id, fill_value=None):
if shard_id < 0 or shard_id >= num_shards:
raise ValueError('shard_id must be between 0 and num_shards')
self._sharded_len = len(iterable) // num_shards
if len(iterable) % num_shards > 0:
self._sharded_len += 1
self.itr = itertools.zip_longest(
range(self._sharded_len),
itertools.islice(iterable, shard_id, len(iterable), num_shards),
fillvalue=fill_value,
)
def __len__(self):
return self._sharded_len
def __iter__(self):
return self
def __next__(self):
return next(self.itr)[1]
class CountingIterator(object):
"""Wrapper around an iterable that maintains the iteration count."""
def __init__(self, iterable):
self.iterable = iterable
self.count = 0
self.itr = iter(self)
def __len__(self):
return len(self.iterable)
def __iter__(self):
for x in self.iterable:
self.count += 1
yield x
def __next__(self):
return next(self.itr)
def has_next(self):
return self.count < len(self)
def skip(self, num_to_skip):
next(itertools.islice(self.itr, num_to_skip, num_to_skip), None)
return self
def collate_tokens(values, pad_idx, eos_idx, left_pad, move_eos_to_beginning=False, pad_sequence=1):
"""Convert a list of 1d tensors into a padded 2d tensor."""
#size = max(v.size(0) for v in values)
orig_size = max(v.size(0) for v in values)
size = 0
if pad_sequence > 1:
size = orig_size // pad_sequence * pad_sequence
if orig_size % pad_sequence > 0:
size += pad_sequence
else:
size = orig_size
res = values[0].new(len(values), size).fill_(pad_idx)
def copy_tensor(src, dst):
assert dst.numel() == src.numel()
if move_eos_to_beginning:
assert src[-1] == eos_idx
dst[0] = eos_idx
dst[1:] = src[:-1]
else:
dst.copy_(src)
for i, v in enumerate(values):
copy_tensor(v, res[i][size - len(v):] if left_pad else res[i][:len(v)])
return res
def collate(samples, pad_idx, eos_idx, left_pad_source=True, left_pad_target=False, pad_sequence=1):
if len(samples) == 0:
return {}
def merge(key, left_pad, move_eos_to_beginning=False):
return collate_tokens(
[s[key] for s in samples],
pad_idx, eos_idx, left_pad, move_eos_to_beginning,
pad_sequence,
)
id = torch.LongTensor([s['id'] for s in samples])
src_tokens = merge('source', left_pad=left_pad_source)
# sort by descending source length
src_lengths = torch.LongTensor([s['source'].numel() for s in samples])
src_lengths, sort_order = src_lengths.sort(descending=True)
id = id.index_select(0, sort_order)
src_tokens = src_tokens.index_select(0, sort_order)
prev_output_tokens = None
target = None
if samples[0].get('target', None) is not None:
target = merge('target', left_pad=left_pad_target)
# we create a shifted version of targets for feeding the
# previous output token(s) into the next decoder step
prev_output_tokens = merge(
'target',
left_pad=left_pad_target,
move_eos_to_beginning=True,
)
prev_output_tokens = prev_output_tokens.index_select(0, sort_order)
target = target.index_select(0, sort_order)
ntokens = sum(len(s['target']) for s in samples)
else:
ntokens = sum(len(s['source']) for s in samples)
return {
'id': id,
'ntokens': ntokens,
'net_input': {
'src_tokens': src_tokens,
'src_lengths': src_lengths,
'prev_output_tokens': prev_output_tokens,
},
'target': target,
}
def get_dummy_batch(num_tokens, src_dict, tgt_dict, src_len=128, tgt_len=128,
left_pad_source=True, left_pad_target=False, pad_sequence=1):
bsz = num_tokens // max(src_len, tgt_len)
dummy_samples = [
{
'id': i,
'source': src_dict.dummy_sentence(src_len),
'target': tgt_dict.dummy_sentence(tgt_len) if tgt_dict is not None else None,
}
for i in range(bsz)
]
return collate(
dummy_samples, pad_idx=src_dict.pad(), eos_idx=src_dict.eos(),
left_pad_source=left_pad_source, left_pad_target=left_pad_target,
pad_sequence=pad_sequence,
)
class EpochBatchIterator(object):
"""Iterate over a FairseqDataset and yield batches bucketed by size.
Batches may contain sequences of different lengths. This iterator can be
reused across multiple epochs with the next_epoch_itr() method.
Args:
dataset: a FairseqDataset
max_tokens: max number of tokens in each batch
max_sentences: max number of sentences in each batch
max_positions: max sentence length supported by the model
required_batch_size_multiple: require batch size to be a multiple of N
seed: seed for random number generator for reproducibility
num_shards: shard the data iterator into N shards
shard_id: which shard of the data iterator to return
"""
def __init__(
self, dataset, max_tokens=None, max_sentences=None, max_positions=None,
required_batch_size_multiple=1, seed=1,
num_shards=1, shard_id=0, epoch=0
):
self.dataset = dataset
self.max_tokens = max_tokens if max_tokens is not None else float('Inf')
self.max_sentences = max_sentences if max_sentences is not None else float('Inf')
self.max_positions = max_positions
self.bsz_mult = required_batch_size_multiple
self.seed = seed
self.num_shards = num_shards
self.shard_id = shard_id
self.epoch = epoch
self._cur_epoch_itr = None
self._next_epoch_itr = None
with numpy_seed(self.seed):
indices = self.dataset.ordered_indices(self.seed, self.epoch)
#need integer, rather than float('Inf') values
max_sentences = max_sentences if max_sentences is not None else sys.maxsize
max_positions_num = 1024
max_tokens = max_tokens if max_tokens is not None else sys.maxsize
#Following line is workaround due to the fact we cannot pass None object as argument
tgt_sizes = self.dataset.tgt_sizes if self.dataset.tgt_sizes is not None else self.dataset.src_sizes
batches = fairseq.data.batch_C.make_batches(
self.dataset.src_sizes, tgt_sizes, indices, max_tokens,
max_sentences, self.bsz_mult, max_positions_num)
self.frozen_batches = tuple(batches)
def __len__(self):
return len(self.frozen_batches)
def next_epoch_itr(self, shuffle=True):
"""Shuffle batches and return a new iterator over the dataset."""
if self._next_epoch_itr is not None:
self._cur_epoch_itr = self._next_epoch_itr
self._next_epoch_itr = None
else:
self.epoch += 1
self._cur_epoch_itr = self._get_iterator_for_epoch(self.epoch, shuffle)
return self._cur_epoch_itr
def end_of_epoch(self):
return not self._cur_epoch_itr.has_next()
@property
def iterations_in_epoch(self):
if self._cur_epoch_itr is not None:
return self._cur_epoch_itr.count
elif self._next_epoch_itr is not None:
return self._next_epoch_itr.count
return 0
def state_dict(self):
return {
'epoch': self.epoch,
'iterations_in_epoch': self.iterations_in_epoch,
}
def load_state_dict(self, state_dict):
self.epoch = state_dict['epoch']
itr_pos = state_dict.get('iterations_in_epoch', 0)
if itr_pos > 0:
# fast-forward epoch iterator
itr = self._get_iterator_for_epoch(self.epoch, state_dict.get('shuffle', True))
if itr_pos < len(itr):
self._next_epoch_itr = itr.skip(itr_pos)
def _get_iterator_for_epoch(self, epoch, shuffle):
if shuffle:
# set seed based on the seed and epoch number so that we get
# reproducible results when resuming from checkpoints
with numpy_seed(self.seed + epoch):
batches = list(self.frozen_batches) # copy
np.random.shuffle(batches)
else:
batches = self.frozen_batches
return CountingIterator(torch.utils.data.DataLoader(
self.dataset,
collate_fn=self.dataset.collater,
num_workers=1,
batch_sampler=ShardedIterator(batches, self.num_shards, self.shard_id, fill_value=[]),
))
@contextlib.contextmanager
def numpy_seed(seed):
"""Context manager which seeds the NumPy PRNG with the specified seed and
restores the state afterward"""
if seed is None:
yield
return
state = np.random.get_state()
np.random.seed(seed)
try:
yield
finally:
np.random.set_state(state)
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/data/data_utils.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
#
#-------------------------------------------------------------------------
#
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import numpy as np
from torch.utils.data import Dataset, ConcatDataset
from . import data_utils
import itertools
import os
import sys
from fairseq.data import IndexedInMemoryDataset, IndexedRawTextDataset
class LanguagePairDataset(Dataset):
"""A pair of torch.utils.data.Datasets."""
def __init__(
self, src, src_sizes, src_dict,
tgt=None, tgt_sizes=None, tgt_dict=None,
left_pad_source=True, left_pad_target=False,
max_source_positions=1024, max_target_positions=1024,
pad_sequence=1, shuffle=True,
):
if tgt_dict is not None:
assert src_dict.pad() == tgt_dict.pad()
assert src_dict.eos() == tgt_dict.eos()
assert src_dict.unk() == tgt_dict.unk()
self.src = src
self.tgt = tgt
self.src_sizes = np.array(src_sizes)
self.tgt_sizes = np.array(tgt_sizes) if tgt_sizes is not None else None
self.src_dict = src_dict
self.tgt_dict = tgt_dict
self.left_pad_source = left_pad_source
self.left_pad_target = left_pad_target
self.max_source_positions = max_source_positions
self.max_target_positions = max_target_positions
self.pad_sequence = pad_sequence
self.shuffle = shuffle
print("| Sentences are being padded to multiples of: {}".format(self.pad_sequence), file=sys.stderr)
def __getitem__(self, index):
return {
'id': index,
'source': self.src[index],
'target': self.tgt[index] if self.tgt is not None else None,
}
def __len__(self):
return len(self.src)
def collater(self, samples):
"""Merge a list of samples to form a mini-batch."""
return data_utils.collate(
samples, pad_idx=self.src_dict.pad(), eos_idx=self.src_dict.eos(),
left_pad_source=self.left_pad_source, left_pad_target=self.left_pad_target,
pad_sequence=self.pad_sequence,
)
def num_tokens(self, index):
"""Return an example's length (number of tokens), used for batching."""
orig_size = max(self.src_sizes[index], self.tgt_sizes[index] if self.tgt_sizes is not None else 0)
assert self.pad_sequence > 0, "Padding multiple has to be greater than 0"
size = 0
if self.pad_sequence > 1:
size = orig_size // self.pad_sequence * self.pad_sequence
if orig_size % self.pad_sequence > 0:
size += self.pad_sequence
else:
size = orig_size
return size
#return max(self.src_sizes[index], self.tgt_sizes[index] if self.tgt_sizes is not None else 0)
def ordered_indices(self, seed=None, epoch=1):
"""Ordered indices for batching."""
if self.shuffle:
indices = np.random.RandomState(seed + epoch).permutation(len(self))
else:
indices = np.arange(len(self))
if self.tgt_sizes is not None:
indices = indices[np.argsort(self.tgt_sizes[indices], kind='mergesort')]
return indices[np.argsort(self.src_sizes[indices], kind='mergesort')]
def valid_size(self, index, max_positions):
"""Check if an example's size is valid according to max_positions."""
max_source_positions, max_target_positions = self._get_max_positions(max_positions)
return (
self.src_sizes[index] <= max_source_positions and
(self.tgt_sizes is None or self.tgt_sizes[index] <= max_target_positions)
)
def _get_max_positions(self, max_positions):
if max_positions is None:
return self.max_source_positions, self.max_target_positions
assert len(max_positions) == 2
max_src_pos, max_tgt_pos = max_positions
return min(self.max_source_positions, max_src_pos), min(self.max_target_positions, max_tgt_pos)
def load_dataset(args, datasets, split, src_dict, tgt_dict, combine=False):
"""Load a dataset split."""
def split_exists(split, src, tgt, lang):
filename = os.path.join(args.data, '{}.{}-{}.{}'.format(split, src, tgt, lang))
if args.raw_text and IndexedRawTextDataset.exists(filename):
return True
elif not args.raw_text and IndexedInMemoryDataset.exists(filename):
return True
return False
def indexed_dataset(path, dictionary):
if args.raw_text:
return IndexedRawTextDataset(path, dictionary)
elif IndexedInMemoryDataset.exists(path):
return IndexedInMemoryDataset(path, fix_lua_indexing=True)
return None
src_datasets = []
tgt_datasets = []
for k in itertools.count():
split_k = split + (str(k) if k > 0 else '')
# infer langcode
src, tgt = args.source_lang, args.target_lang
if split_exists(split_k, src, tgt, src):
prefix = os.path.join(args.data, '{}.{}-{}.'.format(split_k, src, tgt))
elif split_exists(split_k, tgt, src, src):
prefix = os.path.join(args.data, '{}.{}-{}.'.format(split_k, tgt, src))
else:
if k > 0:
break
else:
raise FileNotFoundError('Dataset not found: {} ({})'.format(split, args.data))
src_datasets.append(indexed_dataset(prefix + src, src_dict))
tgt_datasets.append(indexed_dataset(prefix + tgt, tgt_dict))
print('| {} {} {} examples'.format(args.data, split_k, len(src_datasets[-1])))
if not combine:
break
assert len(src_datasets) == len(tgt_datasets)
if len(src_datasets) == 1:
src_dataset, tgt_dataset = src_datasets[0], tgt_datasets[0]
src_sizes = src_dataset.sizes
tgt_sizes = tgt_dataset.sizes
else:
src_dataset = ConcatDataset(src_datasets)
tgt_dataset = ConcatDataset(tgt_datasets)
src_sizes = np.concatenate([ds.sizes for ds in src_datasets])
tgt_sizes = np.concatenate([ds.sizes for ds in tgt_datasets])
datasets[split] = LanguagePairDataset(
src_dataset, src_sizes, src_dict,
tgt_dataset, tgt_sizes, tgt_dict,
left_pad_source=args.left_pad_source,
left_pad_target=args.left_pad_target,
max_source_positions=args.max_source_positions,
max_target_positions=args.max_target_positions,
pad_sequence=args.pad_sequence,
)
def load_dataset_splits(args, splits, src_dict, tgt_dict):
datasets = {}
for split in splits:
if split == 'train':
load_dataset(args, datasets, split, src_dict, tgt_dict, combine=True)
else:
for k in itertools.count():
split_k = split + (str(k) if k > 0 else '')
try:
load_dataset(args, datasets, split_k, src_dict, tgt_dict, combine=False)
except FileNotFoundError as e:
if k > 0:
break
raise e
return datasets
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/data/language_pair_dataset.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
import os
import struct
import numpy as np
import torch
from fairseq.tokenizer import Tokenizer
def read_longs(f, n):
a = np.empty(n, dtype=np.int64)
f.readinto(a)
return a
def write_longs(f, a):
f.write(np.array(a, dtype=np.int64))
dtypes = {
1: np.uint8,
2: np.int8,
3: np.int16,
4: np.int32,
5: np.int64,
6: np.float,
7: np.double,
}
def code(dtype):
for k in dtypes.keys():
if dtypes[k] == dtype:
return k
def index_file_path(prefix_path):
return prefix_path + '.idx'
def data_file_path(prefix_path):
return prefix_path + '.bin'
class IndexedDataset(torch.utils.data.Dataset):
"""Loader for TorchNet IndexedDataset"""
def __init__(self, path, fix_lua_indexing=False):
super().__init__()
self.fix_lua_indexing = fix_lua_indexing
with open(index_file_path(path), 'rb') as f:
magic = f.read(8)
assert magic == b'TNTIDX\x00\x00'
version = f.read(8)
assert struct.unpack('<Q', version) == (1,)
code, self.element_size = struct.unpack('<QQ', f.read(16))
self.dtype = dtypes[code]
self.size, self.s = struct.unpack('<QQ', f.read(16))
self.dim_offsets = read_longs(f, self.size + 1)
self.data_offsets = read_longs(f, self.size + 1)
self.sizes = read_longs(f, self.s)
self.read_data(path)
def read_data(self, path):
self.data_file = open(data_file_path(path), 'rb', buffering=0)
def check_index(self, i):
if i < 0 or i >= self.size:
raise IndexError('index out of range')
def __del__(self):
self.data_file.close()
def __getitem__(self, i):
self.check_index(i)
tensor_size = self.sizes[self.dim_offsets[i]:self.dim_offsets[i + 1]]
a = np.empty(tensor_size, dtype=self.dtype)
self.data_file.seek(self.data_offsets[i] * self.element_size)
self.data_file.readinto(a)
item = torch.from_numpy(a).long()
if self.fix_lua_indexing:
item -= 1 # subtract 1 for 0-based indexing
return item
def __len__(self):
return self.size
@staticmethod
def exists(path):
return (
os.path.exists(index_file_path(path)) and
os.path.exists(data_file_path(path))
)
class IndexedInMemoryDataset(IndexedDataset):
"""Loader for TorchNet IndexedDataset, keeps all the data in memory"""
def read_data(self, path):
self.data_file = open(data_file_path(path), 'rb')
self.buffer = np.empty(self.data_offsets[-1], dtype=self.dtype)
self.data_file.readinto(self.buffer)
self.data_file.close()
if self.fix_lua_indexing:
self.buffer -= 1 # subtract 1 for 0-based indexing
def __del__(self):
pass
def __getitem__(self, i):
self.check_index(i)
tensor_size = self.sizes[self.dim_offsets[i]:self.dim_offsets[i + 1]]
a = np.empty(tensor_size, dtype=self.dtype)
np.copyto(a, self.buffer[self.data_offsets[i]:self.data_offsets[i + 1]])
return torch.from_numpy(a).long()
class IndexedRawTextDataset(IndexedDataset):
"""Takes a text file as input and binarizes it in memory at instantiation.
Original lines are also kept in memory"""
def __init__(self, path, dictionary, append_eos=True, reverse_order=False):
self.tokens_list = []
self.lines = []
self.sizes = []
self.append_eos = append_eos
self.reverse_order = reverse_order
self.read_data(path, dictionary)
self.size = len(self.tokens_list)
def read_data(self, path, dictionary):
with open(path, 'r') as f:
for line in f:
self.lines.append(line.strip('\n'))
tokens = Tokenizer.tokenize(
line, dictionary, add_if_not_exist=False,
append_eos=self.append_eos, reverse_order=self.reverse_order,
).long()
self.tokens_list.append(tokens)
self.sizes.append(len(tokens))
self.sizes = np.array(self.sizes)
def __getitem__(self, i):
self.check_index(i)
return self.tokens_list[i]
def get_original_text(self, i):
self.check_index(i)
return self.lines[i]
def __del__(self):
pass
def __len__(self):
return self.size
@staticmethod
def exists(path):
return os.path.exists(path)
class IndexedDatasetBuilder(object):
element_sizes = {
np.uint8: 1,
np.int8: 1,
np.int16: 2,
np.int32: 4,
np.int64: 8,
np.float: 4,
np.double: 8
}
def __init__(self, out_file, dtype=np.int32):
self.out_file = open(out_file, 'wb')
self.dtype = dtype
self.data_offsets = [0]
self.dim_offsets = [0]
self.sizes = []
self.element_size = self.element_sizes[self.dtype]
def add_item(self, tensor):
# +1 for Lua compatibility
bytes = self.out_file.write(np.array(tensor.numpy() + 1, dtype=self.dtype))
self.data_offsets.append(self.data_offsets[-1] + bytes / self.element_size)
for s in tensor.size():
self.sizes.append(s)
self.dim_offsets.append(self.dim_offsets[-1] + len(tensor.size()))
def finalize(self, index_file):
self.out_file.close()
index = open(index_file, 'wb')
index.write(b'TNTIDX\x00\x00')
index.write(struct.pack('<Q', 1))
index.write(struct.pack('<QQ', code(self.dtype), self.element_size))
index.write(struct.pack('<QQ', len(self.data_offsets) - 1, len(self.sizes)))
write_longs(index, self.dim_offsets)
write_longs(index, self.data_offsets)
write_longs(index, self.sizes)
index.close()
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/data/indexed_dataset.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
from collections import Counter
import os
import torch
class Dictionary(object):
"""A mapping from symbols to consecutive integers"""
def __init__(self, pad='<pad>', eos='</s>', unk='<unk>'):
self.unk_word, self.pad_word, self.eos_word = unk, pad, eos
self.symbols = []
self.count = []
self.indices = {}
# dictionary indexing starts at 1 for consistency with Lua
self.add_symbol('<Lua heritage>')
self.pad_index = self.add_symbol(pad)
self.eos_index = self.add_symbol(eos)
self.unk_index = self.add_symbol(unk)
self.nspecial = len(self.symbols)
def __eq__(self, other):
return self.indices == other.indices
def __getitem__(self, idx):
if idx < len(self.symbols):
return self.symbols[idx]
return self.unk_word
def __len__(self):
"""Returns the number of symbols in the dictionary"""
return len(self.symbols)
def index(self, sym):
"""Returns the index of the specified symbol"""
if sym in self.indices:
return self.indices[sym]
return self.unk_index
def string(self, tensor, bpe_symbol=None, escape_unk=False):
"""Helper for converting a tensor of token indices to a string.
Can optionally remove BPE symbols or escape <unk> words.
"""
if torch.is_tensor(tensor) and tensor.dim() == 2:
return '\n'.join(self.string(t) for t in tensor)
def token_string(i):
if i == self.unk():
return self.unk_string(escape_unk)
else:
return self[i]
sent = ' '.join(token_string(i) for i in tensor if i != self.eos())
if bpe_symbol is not None:
sent = (sent + ' ').replace(bpe_symbol, '').rstrip()
return sent
def unk_string(self, escape=False):
"""Return unknown string, optionally escaped as: <<unk>>"""
if escape:
return '<{}>'.format(self.unk_word)
else:
return self.unk_word
def add_symbol(self, word, n=1):
"""Adds a word to the dictionary"""
if word in self.indices:
idx = self.indices[word]
self.count[idx] = self.count[idx] + n
return idx
else:
idx = len(self.symbols)
self.indices[word] = idx
self.symbols.append(word)
self.count.append(n)
return idx
def update(self, new_dict):
"""Updates counts from new dictionary."""
for word in new_dict.symbols:
idx2 = new_dict.indices[word]
if word in self.indices:
idx = self.indices[word]
self.count[idx] = self.count[idx] + new_dict.count[idx2]
else:
idx = len(self.symbols)
self.indices[word] = idx
self.symbols.append(word)
self.count.append(new_dict.count[idx2])
def finalize(self, threshold=-1, nwords=-1, padding_factor=8):
"""Sort symbols by frequency in descending order, ignoring special ones.
Args:
- threshold defines the minimum word count
- nwords defines the total number of words in the final dictionary,
including special symbols
- padding_factor can be used to pad the dictionary size to be a
multiple of 8, which is important on some hardware (e.g., Nvidia
Tensor Cores).
"""
if nwords <= 0:
nwords = len(self)
new_indices = dict(zip(self.symbols[:self.nspecial], range(self.nspecial)))
new_symbols = self.symbols[:self.nspecial]
new_count = self.count[:self.nspecial]
c = Counter(dict(zip(self.symbols[self.nspecial:], self.count[self.nspecial:])))
for symbol, count in c.most_common(nwords - self.nspecial):
if count >= threshold:
new_indices[symbol] = len(new_symbols)
new_symbols.append(symbol)
new_count.append(count)
else:
break
threshold_nwords = len(new_symbols)
if padding_factor > 1:
i = 0
while threshold_nwords % padding_factor != 0:
symbol = 'madeupword{:04d}'.format(i)
new_indices[symbol] = len(new_symbols)
new_symbols.append(symbol)
new_count.append(0)
i += 1
threshold_nwords += 1
assert len(new_symbols) % padding_factor == 0
assert len(new_symbols) == len(new_indices)
self.count = list(new_count)
self.symbols = list(new_symbols)
self.indices = new_indices
def pad(self):
"""Helper to get index of pad symbol"""
return self.pad_index
def eos(self):
"""Helper to get index of end-of-sentence symbol"""
return self.eos_index
def unk(self):
"""Helper to get index of unk symbol"""
return self.unk_index
@classmethod
def loads(cls, s):
lines = s.strip().split('\n')
d = cls()
for line in lines:
idx = line.rfind(' ')
word = line[:idx]
count = int(line[idx + 1:])
d.indices[word] = len(d.symbols)
d.symbols.append(word)
d.count.append(count)
return d
@classmethod
def load(cls, f, ignore_utf_errors=False):
"""Loads the dictionary from a text file with the format:
```
<symbol0> <count0>
<symbol1> <count1>
...
```
"""
if isinstance(f, str):
try:
if not ignore_utf_errors:
with open(f, 'r', encoding='utf-8') as fd:
return cls.load(fd)
else:
with open(f, 'r', encoding='utf-8', errors='ignore') as fd:
return cls.load(fd)
except FileNotFoundError as fnfe:
raise fnfe
except Exception:
raise Exception("Incorrect encoding detected in {}, please "
"rebuild the dataset".format(f))
cont = f.read()
d = cls.loads(cont)
return d
def save(self, f):
"""Stores dictionary into a text file"""
if isinstance(f, str):
os.makedirs(os.path.dirname(f), exist_ok=True)
with open(f, 'w', encoding='utf-8') as fd:
return self.save(fd)
d = self.saves()
f.write(d)
def saves(self):
rv = ''
for symbol, count in zip(self.symbols[self.nspecial:], self.count[self.nspecial:]):
rv += '{} {}\n'.format(symbol, count)
return rv
def dummy_sentence(self, length):
t = torch.Tensor(length).uniform_(self.nspecial + 1, len(self)).long()
t[-1] = self.eos()
return t
def get_metadata(self):
return {'len': self.__len__(),
'pad': self.pad_index,
'eos': self.eos_index,
'unk': self.unk_index,
'nspecial': self.nspecial
}
| DeepLearningExamples-master | PyTorch/Translation/Transformer/fairseq/data/dictionary.py |
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
#
"""
Use this script in order to build symmetric alignments for your translation
dataset.
This script depends on fast_align and mosesdecoder tools. You will need to
build those before running the script.
fast_align:
github: http://github.com/clab/fast_align
instructions: follow the instructions in README.md
mosesdecoder:
github: http://github.com/moses-smt/mosesdecoder
instructions: http://www.statmt.org/moses/?n=Development.GetStarted
The script produces the following files under --output_dir:
text.joined - concatenation of lines from the source_file and the
target_file.
align.forward - forward pass of fast_align.
align.backward - backward pass of fast_align.
aligned.sym_heuristic - symmetrized alignment.
"""
import argparse
import os
from itertools import zip_longest
def main():
parser = argparse.ArgumentParser(description='symmetric alignment builer')
parser.add_argument('--fast_align_dir',
help='path to fast_align build directory')
parser.add_argument('--mosesdecoder_dir',
help='path to mosesdecoder root directory')
parser.add_argument('--sym_heuristic',
help='heuristic to use for symmetrization',
default='grow-diag-final-and')
parser.add_argument('--source_file',
help='path to a file with sentences '
'in the source language')
parser.add_argument('--target_file',
help='path to a file with sentences '
'in the target language')
parser.add_argument('--output_dir',
help='output directory')
args = parser.parse_args()
fast_align_bin = os.path.join(args.fast_align_dir, 'fast_align')
symal_bin = os.path.join(args.mosesdecoder_dir, 'bin', 'symal')
sym_fast_align_bin = os.path.join(
args.mosesdecoder_dir, 'scripts', 'ems',
'support', 'symmetrize-fast-align.perl')
# create joined file
joined_file = os.path.join(args.output_dir, 'text.joined')
with open(args.source_file, 'r') as src, open(args.target_file, 'r') as tgt:
with open(joined_file, 'w') as joined:
for s, t in zip_longest(src, tgt):
print('{} ||| {}'.format(s.strip(), t.strip()), file=joined)
bwd_align_file = os.path.join(args.output_dir, 'align.backward')
# run forward alignment
fwd_align_file = os.path.join(args.output_dir, 'align.forward')
fwd_fast_align_cmd = '{FASTALIGN} -i {JOINED} -d -o -v > {FWD}'.format(
FASTALIGN=fast_align_bin,
JOINED=joined_file,
FWD=fwd_align_file)
assert os.system(fwd_fast_align_cmd) == 0
# run backward alignment
bwd_align_file = os.path.join(args.output_dir, 'align.backward')
bwd_fast_align_cmd = '{FASTALIGN} -i {JOINED} -d -o -v -r > {BWD}'.format(
FASTALIGN=fast_align_bin,
JOINED=joined_file,
BWD=bwd_align_file)
assert os.system(bwd_fast_align_cmd) == 0
# run symmetrization
sym_out_file = os.path.join(args.output_dir, 'aligned')
sym_cmd = '{SYMFASTALIGN} {FWD} {BWD} {SRC} {TGT} {OUT} {HEURISTIC} {SYMAL}'.format(
SYMFASTALIGN=sym_fast_align_bin,
FWD=fwd_align_file,
BWD=bwd_align_file,
SRC=args.source_file,
TGT=args.target_file,
OUT=sym_out_file,
HEURISTIC=args.sym_heuristic,
SYMAL=symal_bin
)
assert os.system(sym_cmd) == 0
if __name__ == '__main__':
main()
| DeepLearningExamples-master | PyTorch/Translation/Transformer/scripts/build_sym_alignment.py |
DeepLearningExamples-master | PyTorch/Translation/Transformer/scripts/__init__.py |
|
#!/usr/bin/env python3
import argparse
import collections
import torch
import os
import re
def average_checkpoints(inputs):
"""Loads checkpoints from inputs and returns a model with averaged weights.
Args:
inputs: An iterable of string paths of checkpoints to load from.
Returns:
A dict of string keys mapping to various values. The 'model' key
from the returned dict should correspond to an OrderedDict mapping
string parameter names to torch Tensors.
"""
params_dict = collections.OrderedDict()
params_keys = None
new_state = None
for f in inputs:
state = torch.load(
f,
map_location=(
lambda s, _: torch.serialization.default_restore_location(s, 'cpu')
),
)
# Copies over the settings from the first checkpoint
if new_state is None:
new_state = state
model_params = state['model']
model_params_keys = list(model_params.keys())
if params_keys is None:
params_keys = model_params_keys
elif params_keys != model_params_keys:
raise KeyError(
'For checkpoint {}, expected list of params: {}, '
'but found: {}'.format(f, params_keys, model_params_keys)
)
for k in params_keys:
if k not in params_dict:
params_dict[k] = []
p = model_params[k]
if isinstance(p, torch.HalfTensor):
p = p.float()
params_dict[k].append(p)
averaged_params = collections.OrderedDict()
# v should be a list of torch Tensor.
for k, v in params_dict.items():
summed_v = None
for x in v:
summed_v = summed_v + x if summed_v is not None else x
averaged_params[k] = summed_v / len(v)
new_state['model'] = averaged_params
return new_state
def last_n_checkpoints(paths, n, update_based):
assert len(paths) == 1
path = paths[0]
if update_based:
pt_regexp = re.compile(r'checkpoint_\d+_(\d+)\.pt')
else:
pt_regexp = re.compile(r'checkpoint(\d+)\.pt')
files = os.listdir(path)
entries = []
for f in files:
m = pt_regexp.fullmatch(f)
if m is not None:
entries.append((int(m.group(1)), m.group(0)))
if len(entries) < n:
raise Exception('Found {} checkpoint files but need at least {}', len(entries), n)
return [os.path.join(path, x[1]) for x in sorted(entries, reverse=True)[:n]]
def main():
parser = argparse.ArgumentParser(
description='Tool to average the params of input checkpoints to '
'produce a new checkpoint',
)
parser.add_argument(
'--inputs',
required=True,
nargs='+',
help='Input checkpoint file paths.',
)
parser.add_argument(
'--output',
required=True,
metavar='FILE',
help='Write the new checkpoint containing the averaged weights to this '
'path.',
)
num_group = parser.add_mutually_exclusive_group()
num_group.add_argument(
'--num-epoch-checkpoints',
type=int,
help='if set, will try to find checkpoints with names checkpoint_xx.pt in the path specified by input, '
'and average last this many of them.',
)
num_group.add_argument(
'--num-update-checkpoints',
type=int,
help='if set, will try to find checkpoints with names checkpoint_ee_xx.pt in the path specified by input, '
'and average last this many of them.',
)
args = parser.parse_args()
print(args)
num = None
is_update_based = False
if args.num_update_checkpoints is not None:
num = args.num_update_checkpoints
is_update_based = True
elif args.num_epoch_checkpoints is not None:
num = args.num_epoch_checkpoints
if num is not None:
args.inputs = last_n_checkpoints(args.inputs, num, is_update_based)
print('averaging checkpoints: ', args.inputs)
new_state = average_checkpoints(args.inputs)
torch.save(new_state, args.output)
print('Finished writing averaged checkpoint to {}.'.format(args.output))
if __name__ == '__main__':
main()
| DeepLearningExamples-master | PyTorch/Translation/Transformer/scripts/average_checkpoints.py |
import json
import argparse
from collections import defaultdict, OrderedDict
import matplotlib.pyplot as plt
import numpy as np
def smooth_moving_average(x, n):
fil = np.ones(n)/n
smoothed = np.convolve(x, fil, mode='valid')
smoothed = np.concatenate((x[:n-1], smoothed), axis=0)
return smoothed
def moving_stdev(x, n):
fil = np.ones(n)/n
avg_sqare = np.convolve(np.power(x, 2), fil, mode='valid')
squared_avg = np.power(np.convolve(x, fil, mode='valid'), 2)
var = avg_sqare - squared_avg
stdev = np.sqrt(var)
#pad first few values
stdev = np.concatenate(([0]*(n-1), stdev), axis=0)
return stdev
def get_plot(log):
steps = [x[0] for x in log if isinstance(x[0], int)]
values = [x[2] for x in log if isinstance(x[0], int)]
return steps, values
def highlight_max_point(plot, color):
point = max(zip(*plot), key=lambda x: x[1])
plt.plot(point[0], point[1], 'bo-', color=color)
plt.annotate("{:.2f}".format(point[1]), point)
return point
def main(args):
jlog = defaultdict(list)
jlog['parameters'] = {}
with open(args.log_file, 'r') as f:
for line in f.readlines():
line_dict = json.loads(line[5:])
if line_dict['type'] == 'LOG':
if line_dict['step'] == 'PARAMETER':
jlog['parameters'].update(line_dict['data'])
elif line_dict['step'] == [] and 'training_summary' not in jlog:
jlog['training_summary']=line_dict['data']
else:
for k, v in line_dict['data'].items():
jlog[k].append((line_dict['step'], line_dict['elapsedtime'], v))
fig, ax1 = plt.subplots(figsize=(20,5))
fig.suptitle(args.title, fontsize=16)
ax1.set_xlabel('steps')
ax1.set_ylabel('loss')
# Define colors for specific curves
VAL_LOSS_COLOR = 'blue'
VAL_BLEU_COLOR = 'red'
TEST_BLEU_COLOR = 'pink'
# Plot smoothed loss curve
steps, loss = get_plot(jlog['loss'])
smoothed_loss = smooth_moving_average(loss, 150)
stdev = moving_stdev(loss, 150)
ax1.plot(steps, smoothed_loss, label='Training loss')
ax1.plot(steps, smoothed_loss + stdev, '--', color='orange', linewidth=0.3, label='Stdev')
ax1.plot(steps, smoothed_loss - stdev, '--', color='orange', linewidth=0.3)
# Plot validation loss curve
val_steps, val_loss = get_plot(jlog['val_loss'])
ax1.plot(val_steps, val_loss, color='blue', label='Validation loss')
min_val_loss_step = val_steps[np.argmin(val_loss)]
ax1.axvline(min_val_loss_step, linestyle='dashed', color=VAL_LOSS_COLOR, linewidth=0.5, label='Validation loss minimum')
# Plot BLEU curves
ax2 = ax1.twinx()
ax2.set_ylabel('BLEU')
val_steps, val_bleu = get_plot(jlog['val_bleu'])
ax2.plot(val_steps, val_bleu, color=VAL_BLEU_COLOR, label='Validation BLEU')
mvb_step, _ =highlight_max_point((val_steps,val_bleu), color=VAL_BLEU_COLOR)
# values to be labeled on plot
max_val_bleu_step = val_steps[np.argmax(val_bleu)]
max_val_bleu = val_bleu[val_steps.index(max_val_bleu_step)]
min_loss_bleu = val_bleu[val_steps.index(min_val_loss_step)]
if 'test_bleu' in jlog:
test_steps, test_bleu = get_plot(jlog['test_bleu'])
ax2.plot(val_steps, test_bleu, color=TEST_BLEU_COLOR, label='Test BLEU')
highlight_max_point((test_steps, test_bleu), color=TEST_BLEU_COLOR)
ax2.tick_params(axis='y')
# Annotate points with highest BLEU score as well as those for minimal validation loss
ax2.plot(min_val_loss_step, min_loss_bleu, 'bo-', color=VAL_BLEU_COLOR)
ax2.annotate("{:.2f}".format(min_loss_bleu), (min_val_loss_step, min_loss_bleu))
if 'test_bleu' in jlog:
min_loss_test_bleu = test_bleu[val_steps.index(min_val_loss_step)] #BLEU score on test set when validation loss is minimal
ax2.plot(min_val_loss_step, min_loss_test_bleu, 'bo-', color=TEST_BLEU_COLOR)
ax2.annotate("{:.2f}".format(min_loss_test_bleu), (min_val_loss_step, min_loss_test_bleu))
max_val_bleu_test = test_bleu[val_steps.index(max_val_bleu_step)] #BLEU score on test set when BLEU score on dev set is maximal
ax2.plot(mvb_step, max_val_bleu_test, 'bo-', color=TEST_BLEU_COLOR)
ax2.annotate("{:.2f}".format(max_val_bleu_test), (max_val_bleu_step, max_val_bleu_test))
ax1.legend(loc='lower left', bbox_to_anchor=(1,0))
ax2.legend(loc='upper left', bbox_to_anchor=(1,1))
plt.grid()
plt.savefig(args.output)
# Produce json with training summary
if args.dump_json:
summary = OrderedDict()
summary['args'] = OrderedDict(jlog['parameters'])
summary['min_val_loss'] = min(val_loss)
summary['max_val_bleu'] = max(val_bleu)
summary['max_test_bleu'] = max(test_bleu)
summary['final_values'] = jlog['training_summary']
summary['avg_epoch_loss'] = [x.mean() for x in np.array_split(np.array(loss), jlog['parameters']['max_epoch'])]
summary['min_val_loss_step'] = min_val_loss_step
json.dump(summary, open(args.dump_json, 'w'))
if __name__=='__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--title', type=str)
parser.add_argument('--log-file', type=str)
parser.add_argument('--output' ,'-o', type=str)
parser.add_argument('--dump-json', '-j', type=str)
args = parser.parse_args()
main(args)
| DeepLearningExamples-master | PyTorch/Translation/Transformer/scripts/draw_summary.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
#!/usr/bin/env python
import glob
import os
import torch
from setuptools import find_packages
from setuptools import setup
from torch.utils.cpp_extension import CUDA_HOME
from torch.utils.cpp_extension import CppExtension
from torch.utils.cpp_extension import CUDAExtension
requirements = ["torch", "torchvision"]
def get_extensions():
this_dir = os.path.dirname(os.path.abspath(__file__))
extensions_dir = os.path.join(this_dir, "maskrcnn_benchmark", "csrc")
main_file = glob.glob(os.path.join(extensions_dir, "*.cpp"))
source_cpu = glob.glob(os.path.join(extensions_dir, "cpu", "*.cpp"))
source_cuda = glob.glob(os.path.join(extensions_dir, "cuda", "*.cu"))
sources = main_file + source_cpu
extension = CppExtension
extra_compile_args = {"cxx": []}
define_macros = []
if CUDA_HOME is not None:
extension = CUDAExtension
sources += source_cuda
define_macros += [("WITH_CUDA", None)]
extra_compile_args["nvcc"] = [
"-DCUDA_HAS_FP16=1",
"-D__CUDA_NO_HALF_OPERATORS__",
"-D__CUDA_NO_HALF_CONVERSIONS__",
"-D__CUDA_NO_HALF2_OPERATORS__",
]
sources = [os.path.join(extensions_dir, s) for s in sources]
include_dirs = [extensions_dir]
ext_modules = [
extension(
"maskrcnn_benchmark._C",
sources,
include_dirs=include_dirs,
define_macros=define_macros,
extra_compile_args=extra_compile_args,
)
]
return ext_modules
setup(
name="maskrcnn_benchmark",
version="0.1",
author="fmassa",
url="https://github.com/facebookresearch/maskrcnn-benchmark",
description="object detection in pytorch",
packages=find_packages(exclude=("configs", "tests",)),
# install_requires=requirements,
ext_modules=get_extensions(),
cmdclass={"build_ext": torch.utils.cpp_extension.BuildExtension},
)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/setup.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import cv2
import torch
from torchvision import transforms as T
from maskrcnn_benchmark.modeling.detector import build_detection_model
from maskrcnn_benchmark.utils.checkpoint import DetectronCheckpointer
from maskrcnn_benchmark.structures.image_list import to_image_list
from maskrcnn_benchmark.modeling.roi_heads.mask_head.inference import Masker
from maskrcnn_benchmark import layers as L
from maskrcnn_benchmark.utils import cv2_util
class COCODemo(object):
# COCO categories for pretty print
CATEGORIES = [
"__background",
"person",
"bicycle",
"car",
"motorcycle",
"airplane",
"bus",
"train",
"truck",
"boat",
"traffic light",
"fire hydrant",
"stop sign",
"parking meter",
"bench",
"bird",
"cat",
"dog",
"horse",
"sheep",
"cow",
"elephant",
"bear",
"zebra",
"giraffe",
"backpack",
"umbrella",
"handbag",
"tie",
"suitcase",
"frisbee",
"skis",
"snowboard",
"sports ball",
"kite",
"baseball bat",
"baseball glove",
"skateboard",
"surfboard",
"tennis racket",
"bottle",
"wine glass",
"cup",
"fork",
"knife",
"spoon",
"bowl",
"banana",
"apple",
"sandwich",
"orange",
"broccoli",
"carrot",
"hot dog",
"pizza",
"donut",
"cake",
"chair",
"couch",
"potted plant",
"bed",
"dining table",
"toilet",
"tv",
"laptop",
"mouse",
"remote",
"keyboard",
"cell phone",
"microwave",
"oven",
"toaster",
"sink",
"refrigerator",
"book",
"clock",
"vase",
"scissors",
"teddy bear",
"hair drier",
"toothbrush",
]
def __init__(
self,
cfg,
confidence_threshold=0.7,
show_mask_heatmaps=False,
masks_per_dim=2,
min_image_size=224,
):
self.cfg = cfg.clone()
self.model = build_detection_model(cfg)
self.model.eval()
self.device = torch.device(cfg.MODEL.DEVICE)
self.model.to(self.device)
self.min_image_size = min_image_size
save_dir = cfg.OUTPUT_DIR
checkpointer = DetectronCheckpointer(cfg, self.model, save_dir=save_dir)
_ = checkpointer.load(cfg.MODEL.WEIGHT)
self.transforms = self.build_transform()
mask_threshold = -1 if show_mask_heatmaps else 0.5
self.masker = Masker(threshold=mask_threshold, padding=1)
# used to make colors for each class
self.palette = torch.tensor([2 ** 25 - 1, 2 ** 15 - 1, 2 ** 21 - 1])
self.cpu_device = torch.device("cpu")
self.confidence_threshold = confidence_threshold
self.show_mask_heatmaps = show_mask_heatmaps
self.masks_per_dim = masks_per_dim
def build_transform(self):
"""
Creates a basic transformation that was used to train the models
"""
cfg = self.cfg
# we are loading images with OpenCV, so we don't need to convert them
# to BGR, they are already! So all we need to do is to normalize
# by 255 if we want to convert to BGR255 format, or flip the channels
# if we want it to be in RGB in [0-1] range.
if cfg.INPUT.TO_BGR255:
to_bgr_transform = T.Lambda(lambda x: x * 255)
else:
to_bgr_transform = T.Lambda(lambda x: x[[2, 1, 0]])
normalize_transform = T.Normalize(
mean=cfg.INPUT.PIXEL_MEAN, std=cfg.INPUT.PIXEL_STD
)
transform = T.Compose(
[
T.ToPILImage(),
T.Resize(self.min_image_size),
T.ToTensor(),
to_bgr_transform,
normalize_transform,
]
)
return transform
def run_on_opencv_image(self, image):
"""
Arguments:
image (np.ndarray): an image as returned by OpenCV
Returns:
prediction (BoxList): the detected objects. Additional information
of the detection properties can be found in the fields of
the BoxList via `prediction.fields()`
"""
predictions = self.compute_prediction(image)
top_predictions = self.select_top_predictions(predictions)
result = image.copy()
if self.show_mask_heatmaps:
return self.create_mask_montage(result, top_predictions)
result = self.overlay_boxes(result, top_predictions)
if self.cfg.MODEL.MASK_ON:
result = self.overlay_mask(result, top_predictions)
result = self.overlay_class_names(result, top_predictions)
return result
def compute_prediction(self, original_image):
"""
Arguments:
original_image (np.ndarray): an image as returned by OpenCV
Returns:
prediction (BoxList): the detected objects. Additional information
of the detection properties can be found in the fields of
the BoxList via `prediction.fields()`
"""
# apply pre-processing to image
image = self.transforms(original_image)
# convert to an ImageList, padded so that it is divisible by
# cfg.DATALOADER.SIZE_DIVISIBILITY
image_list = to_image_list(image, self.cfg.DATALOADER.SIZE_DIVISIBILITY)
image_list = image_list.to(self.device)
# compute predictions
with torch.no_grad():
predictions = self.model(image_list)
predictions = [o.to(self.cpu_device) for o in predictions]
# always single image is passed at a time
prediction = predictions[0]
# reshape prediction (a BoxList) into the original image size
height, width = original_image.shape[:-1]
prediction = prediction.resize((width, height))
if prediction.has_field("mask"):
# if we have masks, paste the masks in the right position
# in the image, as defined by the bounding boxes
masks = prediction.get_field("mask")
# always single image is passed at a time
masks = self.masker([masks], [prediction])[0]
prediction.add_field("mask", masks)
return prediction
def select_top_predictions(self, predictions):
"""
Select only predictions which have a `score` > self.confidence_threshold,
and returns the predictions in descending order of score
Arguments:
predictions (BoxList): the result of the computation by the model.
It should contain the field `scores`.
Returns:
prediction (BoxList): the detected objects. Additional information
of the detection properties can be found in the fields of
the BoxList via `prediction.fields()`
"""
scores = predictions.get_field("scores")
keep = torch.nonzero(scores > self.confidence_threshold).squeeze(1)
predictions = predictions[keep]
scores = predictions.get_field("scores")
_, idx = scores.sort(0, descending=True)
return predictions[idx]
def compute_colors_for_labels(self, labels):
"""
Simple function that adds fixed colors depending on the class
"""
colors = labels[:, None] * self.palette
colors = (colors % 255).numpy().astype("uint8")
return colors
def overlay_boxes(self, image, predictions):
"""
Adds the predicted boxes on top of the image
Arguments:
image (np.ndarray): an image as returned by OpenCV
predictions (BoxList): the result of the computation by the model.
It should contain the field `labels`.
"""
labels = predictions.get_field("labels")
boxes = predictions.bbox
colors = self.compute_colors_for_labels(labels).tolist()
for box, color in zip(boxes, colors):
box = box.to(torch.int64)
top_left, bottom_right = box[:2].tolist(), box[2:].tolist()
image = cv2.rectangle(
image, tuple(top_left), tuple(bottom_right), tuple(color), 1
)
return image
def overlay_mask(self, image, predictions):
"""
Adds the instances contours for each predicted object.
Each label has a different color.
Arguments:
image (np.ndarray): an image as returned by OpenCV
predictions (BoxList): the result of the computation by the model.
It should contain the field `mask` and `labels`.
"""
masks = predictions.get_field("mask").numpy()
labels = predictions.get_field("labels")
colors = self.compute_colors_for_labels(labels).tolist()
for mask, color in zip(masks, colors):
thresh = mask[0, :, :, None]
contours, hierarchy = cv2_util.findContours(
thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE
)
image = cv2.drawContours(image, contours, -1, color, 3)
composite = image
return composite
def create_mask_montage(self, image, predictions):
"""
Create a montage showing the probability heatmaps for each one one of the
detected objects
Arguments:
image (np.ndarray): an image as returned by OpenCV
predictions (BoxList): the result of the computation by the model.
It should contain the field `mask`.
"""
masks = predictions.get_field("mask")
masks_per_dim = self.masks_per_dim
masks = L.interpolate(
masks.float(), scale_factor=1 / masks_per_dim
).byte()
height, width = masks.shape[-2:]
max_masks = masks_per_dim ** 2
masks = masks[:max_masks]
# handle case where we have less detections than max_masks
if len(masks) < max_masks:
masks_padded = torch.zeros(max_masks, 1, height, width, dtype=torch.uint8)
masks_padded[: len(masks)] = masks
masks = masks_padded
masks = masks.reshape(masks_per_dim, masks_per_dim, height, width)
result = torch.zeros(
(masks_per_dim * height, masks_per_dim * width), dtype=torch.uint8
)
for y in range(masks_per_dim):
start_y = y * height
end_y = (y + 1) * height
for x in range(masks_per_dim):
start_x = x * width
end_x = (x + 1) * width
result[start_y:end_y, start_x:end_x] = masks[y, x]
return cv2.applyColorMap(result.numpy(), cv2.COLORMAP_JET)
def overlay_class_names(self, image, predictions):
"""
Adds detected class names and scores in the positions defined by the
top-left corner of the predicted bounding box
Arguments:
image (np.ndarray): an image as returned by OpenCV
predictions (BoxList): the result of the computation by the model.
It should contain the field `scores` and `labels`.
"""
scores = predictions.get_field("scores").tolist()
labels = predictions.get_field("labels").tolist()
labels = [self.CATEGORIES[i] for i in labels]
boxes = predictions.bbox
template = "{}: {:.2f}"
for box, score, label in zip(boxes, scores, labels):
x, y = box[:2]
s = template.format(label, score)
cv2.putText(
image, s, (x, y), cv2.FONT_HERSHEY_SIMPLEX, .5, (255, 255, 255), 1
)
return image
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/demo/predictor.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import argparse
import cv2
from maskrcnn_benchmark.config import cfg
from predictor import COCODemo
import time
def main():
parser = argparse.ArgumentParser(description="PyTorch Object Detection Webcam Demo")
parser.add_argument(
"--config-file",
default="../configs/caffe2/e2e_mask_rcnn_R_50_FPN_1x_caffe2.yaml",
metavar="FILE",
help="path to config file",
)
parser.add_argument(
"--confidence-threshold",
type=float,
default=0.7,
help="Minimum score for the prediction to be shown",
)
parser.add_argument(
"--min-image-size",
type=int,
default=224,
help="Smallest size of the image to feed to the model. "
"Model was trained with 800, which gives best results",
)
parser.add_argument(
"--show-mask-heatmaps",
dest="show_mask_heatmaps",
help="Show a heatmap probability for the top masks-per-dim masks",
action="store_true",
)
parser.add_argument(
"--masks-per-dim",
type=int,
default=2,
help="Number of heatmaps per dimension to show",
)
parser.add_argument(
"opts",
help="Modify model config options using the command-line",
default=None,
nargs=argparse.REMAINDER,
)
args = parser.parse_args()
# load config from file and command-line arguments
cfg.merge_from_file(args.config_file)
cfg.merge_from_list(args.opts)
cfg.freeze()
# prepare object that handles inference plus adds predictions on top of image
coco_demo = COCODemo(
cfg,
confidence_threshold=args.confidence_threshold,
show_mask_heatmaps=args.show_mask_heatmaps,
masks_per_dim=args.masks_per_dim,
min_image_size=args.min_image_size,
)
cam = cv2.VideoCapture(0)
while True:
start_time = time.time()
ret_val, img = cam.read()
composite = coco_demo.run_on_opencv_image(img)
print("Time: {:.2f} s / img".format(time.time() - start_time))
cv2.imshow("COCO detections", composite)
if cv2.waitKey(1) == 27:
break # esc to quit
cv2.destroyAllWindows()
if __name__ == "__main__":
main()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/demo/webcam.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
# Set up custom environment before nearly anything else is imported
# NOTE: this should be the first import (no not reorder)
from maskrcnn_benchmark.utils.env import setup_environment # noqa F401 isort:skip
import argparse
import os
import torch
from maskrcnn_benchmark.config import cfg
from maskrcnn_benchmark.data import make_data_loader
from maskrcnn_benchmark.engine.inference import inference
from maskrcnn_benchmark.modeling.detector import build_detection_model
from maskrcnn_benchmark.utils.checkpoint import DetectronCheckpointer
from maskrcnn_benchmark.utils.collect_env import collect_env_info
from maskrcnn_benchmark.utils.comm import synchronize, get_rank, is_main_process
from maskrcnn_benchmark.utils.logger import setup_logger
from maskrcnn_benchmark.utils.miscellaneous import mkdir
from maskrcnn_benchmark.utils.logger import format_step
import dllogger
def main():
parser = argparse.ArgumentParser(description="PyTorch Object Detection Inference")
parser.add_argument(
"--config-file",
default="/workspace/object_detection/configs/e2e_mask_rcnn_R_50_FPN_1x.yaml",
metavar="FILE",
help="path to config file",
)
parser.add_argument("--local_rank", type=int, default=os.getenv('LOCAL_RANK', 0))
parser.add_argument("--json-summary",
help="Out file for DLLogger",
default="dllogger_inference.out",
type=str)
parser.add_argument(
"--skip-eval",
dest="skip_eval",
help="Do not eval the predictions",
action="store_true",
)
parser.add_argument(
"--fp16",
help="Mixed precision training",
action="store_true",
)
parser.add_argument(
"--amp",
help="Mixed precision training",
action="store_true",
)
parser.add_argument(
"--infer_steps",
help="Total inference steps",
default=-1,
type=int)
parser.add_argument(
"opts",
help="Modify config options using the command-line",
default=None,
nargs=argparse.REMAINDER,
)
args = parser.parse_args()
args.fp16 = args.fp16 or args.amp
num_gpus = int(os.environ["WORLD_SIZE"]) if "WORLD_SIZE" in os.environ else 1
distributed = num_gpus > 1
if distributed:
torch.cuda.set_device(args.local_rank)
torch.distributed.init_process_group(
backend="nccl", init_method="env://"
)
synchronize()
cfg.merge_from_file(args.config_file)
cfg.merge_from_list(args.opts)
cfg.freeze()
save_dir = ""
logger = setup_logger("maskrcnn_benchmark", save_dir, get_rank())
if is_main_process():
dllogger.init(backends=[dllogger.JSONStreamBackend(verbosity=dllogger.Verbosity.VERBOSE,
filename=args.json_summary),
dllogger.StdOutBackend(verbosity=dllogger.Verbosity.VERBOSE, step_format=format_step)])
else:
dllogger.init(backends=[])
dllogger.metadata("BBOX_mAP", {"unit": None})
dllogger.metadata("MASK_mAP", {"unit": None})
dllogger.metadata("e2e_infer_time", {"unit": "s"})
dllogger.metadata("inference_perf_fps", {"unit": "images/s"})
dllogger.metadata("latency_avg", {"unit": "s"})
dllogger.metadata("latency_90", {"unit": "s"})
dllogger.metadata("latency_95", {"unit": "s"})
dllogger.metadata("latency_99", {"unit": "s"})
save_dir = ""
dllogger.log(step="PARAMETER", data={"config":cfg})
dllogger.log(step="PARAMETER", data={"gpu_count": num_gpus})
# dllogger.log(step="PARAMETER", data={"env_info": collect_env_info()})
model = build_detection_model(cfg)
model.to(cfg.MODEL.DEVICE)
# Initialize mixed-precision
if args.fp16:
use_mixed_precision = True
else:
use_mixed_precision = cfg.DTYPE == "float16"
output_dir = cfg.OUTPUT_DIR
checkpointer = DetectronCheckpointer(cfg, model, save_dir=output_dir)
_ = checkpointer.load(cfg.MODEL.WEIGHT)
iou_types = ("bbox",)
if cfg.MODEL.MASK_ON:
iou_types = iou_types + ("segm",)
output_folders = [None] * len(cfg.DATASETS.TEST)
dataset_names = cfg.DATASETS.TEST
if cfg.OUTPUT_DIR:
for idx, dataset_name in enumerate(dataset_names):
output_folder = os.path.join(cfg.OUTPUT_DIR, "inference", dataset_name)
mkdir(output_folder)
output_folders[idx] = output_folder
data_loaders_val = make_data_loader(cfg, is_train=False, is_distributed=distributed)
results = []
for output_folder, dataset_name, data_loader_val in zip(output_folders, dataset_names, data_loaders_val):
if use_mixed_precision:
with torch.cuda.amp.autocast():
result = inference(
model,
data_loader_val,
dataset_name=dataset_name,
iou_types=iou_types,
box_only=cfg.MODEL.RPN_ONLY,
device=cfg.MODEL.DEVICE,
expected_results=cfg.TEST.EXPECTED_RESULTS,
expected_results_sigma_tol=cfg.TEST.EXPECTED_RESULTS_SIGMA_TOL,
output_folder=output_folder,
skip_eval=args.skip_eval,
dllogger=dllogger,
steps=args.infer_steps
)
else:
result = inference(
model,
data_loader_val,
dataset_name=dataset_name,
iou_types=iou_types,
box_only=cfg.MODEL.RPN_ONLY,
device=cfg.MODEL.DEVICE,
expected_results=cfg.TEST.EXPECTED_RESULTS,
expected_results_sigma_tol=cfg.TEST.EXPECTED_RESULTS_SIGMA_TOL,
output_folder=output_folder,
skip_eval=args.skip_eval,
dllogger=dllogger,
steps=args.infer_steps
)
synchronize()
results.append(result)
if is_main_process() and not args.skip_eval:
map_results, raw_results = results[0]
bbox_map = map_results.results["bbox"]['AP']
segm_map = map_results.results["segm"]['AP']
dllogger.log(step=tuple(), data={"BBOX_mAP": bbox_map, "MASK_mAP": segm_map})
if __name__ == "__main__":
main()
dllogger.log(step=tuple(), data={})
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tools/test_net.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
r"""
Basic training script for PyTorch
"""
# Set up custom environment before nearly anything else is imported
# NOTE: this should be the first import (no not reorder)
from maskrcnn_benchmark.utils.env import setup_environment # noqa F401 isort:skip
import argparse
import os
import logging
import functools
import torch
from maskrcnn_benchmark.config import cfg
from maskrcnn_benchmark.data import make_data_loader
from maskrcnn_benchmark.solver import make_lr_scheduler
from maskrcnn_benchmark.solver import make_optimizer
from maskrcnn_benchmark.engine.inference import inference
from maskrcnn_benchmark.engine.trainer import do_train
from maskrcnn_benchmark.modeling.detector import build_detection_model
from maskrcnn_benchmark.utils.checkpoint import DetectronCheckpointer
from maskrcnn_benchmark.utils.collect_env import collect_env_info
from maskrcnn_benchmark.utils.comm import synchronize, get_rank, is_main_process
from maskrcnn_benchmark.utils.imports import import_file
from maskrcnn_benchmark.utils.logger import setup_logger
from maskrcnn_benchmark.utils.miscellaneous import mkdir
from maskrcnn_benchmark.engine.tester import test
from maskrcnn_benchmark.utils.logger import format_step
#from dllogger import Logger, StdOutBackend, JSONStreamBackend, Verbosity
#import dllogger as DLLogger
import dllogger
import torch.utils.tensorboard as tbx
from maskrcnn_benchmark.utils.logger import format_step
# See if we can use apex.DistributedDataParallel instead of the torch default,
# and enable mixed-precision via apex.amp
try:
from apex.parallel import DistributedDataParallel as DDP
use_apex_ddp = True
except ImportError:
print('Use APEX for better performance')
use_apex_ddp = False
def test_and_exchange_map(tester, model, distributed):
results = tester(model=model, distributed=distributed)
# main process only
if is_main_process():
# Note: one indirection due to possibility of multiple test datasets, we only care about the first
# tester returns (parsed results, raw results). In our case, don't care about the latter
map_results, raw_results = results[0]
bbox_map = map_results.results["bbox"]['AP']
segm_map = map_results.results["segm"]['AP']
else:
bbox_map = 0.
segm_map = 0.
if distributed:
map_tensor = torch.tensor([bbox_map, segm_map], dtype=torch.float32, device=torch.device("cuda"))
torch.distributed.broadcast(map_tensor, 0)
bbox_map = map_tensor[0].item()
segm_map = map_tensor[1].item()
return bbox_map, segm_map
def mlperf_test_early_exit(iteration, iters_per_epoch, tester, model, distributed, min_bbox_map, min_segm_map):
if iteration > 0 and iteration % iters_per_epoch == 0:
epoch = iteration // iters_per_epoch
dllogger.log(step="PARAMETER", data={"eval_start": True})
bbox_map, segm_map = test_and_exchange_map(tester, model, distributed)
# necessary for correctness
model.train()
dllogger.log(step=(iteration, epoch, ), data={"BBOX_mAP": bbox_map, "MASK_mAP": segm_map})
# terminating condition
if bbox_map >= min_bbox_map and segm_map >= min_segm_map:
dllogger.log(step="PARAMETER", data={"target_accuracy_reached": True})
return True
return False
def train(cfg, local_rank, distributed, fp16, dllogger):
model = build_detection_model(cfg)
device = torch.device(cfg.MODEL.DEVICE)
model.to(device)
optimizer = make_optimizer(cfg, model)
scheduler = make_lr_scheduler(cfg, optimizer)
use_amp = False
if fp16:
use_amp = True
else:
use_amp = cfg.DTYPE == "float16"
if distributed:
if cfg.USE_TORCH_DDP or not use_apex_ddp:
model = torch.nn.parallel.DistributedDataParallel(
model, device_ids=[local_rank], output_device=local_rank,
# this should be removed if we update BatchNorm stats
broadcast_buffers=False,
)
else:
model = DDP(model, delay_allreduce=True)
arguments = {}
arguments["iteration"] = 0
output_dir = cfg.OUTPUT_DIR
save_to_disk = get_rank() == 0
checkpointer = DetectronCheckpointer(
cfg, model, optimizer, scheduler, output_dir, save_to_disk
)
extra_checkpoint_data = checkpointer.load(cfg.MODEL.WEIGHT)
arguments.update(extra_checkpoint_data)
data_loader, iters_per_epoch = make_data_loader(
cfg,
is_train=True,
is_distributed=distributed,
start_iter=arguments["iteration"],
)
checkpoint_period = cfg.SOLVER.CHECKPOINT_PERIOD
# set the callback function to evaluate and potentially
# early exit each epoch
if cfg.PER_EPOCH_EVAL:
per_iter_callback_fn = functools.partial(
mlperf_test_early_exit,
iters_per_epoch=iters_per_epoch,
tester=functools.partial(test, cfg=cfg, dllogger=dllogger),
model=model,
distributed=distributed,
min_bbox_map=cfg.MIN_BBOX_MAP,
min_segm_map=cfg.MIN_MASK_MAP)
else:
per_iter_callback_fn = None
do_train(
model,
data_loader,
optimizer,
scheduler,
checkpointer,
device,
checkpoint_period,
arguments,
use_amp,
cfg,
dllogger,
per_iter_end_callback_fn=per_iter_callback_fn,
nhwc=cfg.NHWC
)
return model, iters_per_epoch
def test_model(cfg, model, distributed, iters_per_epoch, dllogger):
if distributed:
model = model.module
torch.cuda.empty_cache() # TODO check if it helps
iou_types = ("bbox",)
if cfg.MODEL.MASK_ON:
iou_types = iou_types + ("segm",)
output_folders = [None] * len(cfg.DATASETS.TEST)
dataset_names = cfg.DATASETS.TEST
if cfg.OUTPUT_DIR:
for idx, dataset_name in enumerate(dataset_names):
output_folder = os.path.join(cfg.OUTPUT_DIR, "inference", dataset_name)
mkdir(output_folder)
output_folders[idx] = output_folder
data_loaders_val = make_data_loader(cfg, is_train=False, is_distributed=distributed)
results = []
for output_folder, dataset_name, data_loader_val in zip(output_folders, dataset_names, data_loaders_val):
result = inference(
model,
data_loader_val,
dataset_name=dataset_name,
iou_types=iou_types,
box_only=cfg.MODEL.RPN_ONLY,
device=cfg.MODEL.DEVICE,
expected_results=cfg.TEST.EXPECTED_RESULTS,
expected_results_sigma_tol=cfg.TEST.EXPECTED_RESULTS_SIGMA_TOL,
output_folder=output_folder,
dllogger=dllogger,
)
synchronize()
results.append(result)
if is_main_process():
map_results, raw_results = results[0]
bbox_map = map_results.results["bbox"]['AP']
segm_map = map_results.results["segm"]['AP']
dllogger.log(step=(cfg.SOLVER.MAX_ITER, cfg.SOLVER.MAX_ITER / iters_per_epoch,), data={"BBOX_mAP": bbox_map, "MASK_mAP": segm_map})
dllogger.log(step=tuple(), data={"BBOX_mAP": bbox_map, "MASK_mAP": segm_map})
def main():
parser = argparse.ArgumentParser(description="PyTorch Object Detection Training")
parser.add_argument(
"--config-file",
default="",
metavar="FILE",
help="path to config file",
type=str,
)
parser.add_argument("--local_rank", type=int, default=os.getenv('LOCAL_RANK', 0))
parser.add_argument("--max_steps", type=int, default=0, help="Override number of training steps in the config")
parser.add_argument("--skip-test", dest="skip_test", help="Do not test the final model",
action="store_true",)
parser.add_argument("--fp16", help="Mixed precision training", action="store_true")
parser.add_argument("--amp", help="Mixed precision training", action="store_true")
parser.add_argument('--skip_checkpoint', default=False, action='store_true', help="Whether to save checkpoints")
parser.add_argument("--json-summary", help="Out file for DLLogger", default="dllogger.out",
type=str,
)
parser.add_argument(
"opts",
help="Modify config options using the command-line",
default=None,
nargs=argparse.REMAINDER,
)
args = parser.parse_args()
args.fp16 = args.fp16 or args.amp
num_gpus = int(os.environ["WORLD_SIZE"]) if "WORLD_SIZE" in os.environ else 1
args.distributed = num_gpus > 1
if args.distributed:
torch.cuda.set_device(args.local_rank)
torch.distributed.init_process_group(
backend="nccl", init_method="env://"
)
synchronize()
cfg.merge_from_file(args.config_file)
cfg.merge_from_list(args.opts)
# Redundant option - Override config parameter with command line input
if args.max_steps > 0:
cfg.SOLVER.MAX_ITER = args.max_steps
if args.skip_checkpoint:
cfg.SAVE_CHECKPOINT = False
cfg.freeze()
output_dir = cfg.OUTPUT_DIR
if output_dir:
mkdir(output_dir)
logger = setup_logger("maskrcnn_benchmark", output_dir, get_rank())
if is_main_process():
dllogger.init(backends=[dllogger.JSONStreamBackend(verbosity=dllogger.Verbosity.VERBOSE,
filename=args.json_summary),
dllogger.StdOutBackend(verbosity=dllogger.Verbosity.VERBOSE, step_format=format_step)])
else:
dllogger.init(backends=[])
dllogger.metadata("BBOX_mAP", {"unit": None})
dllogger.metadata("MASK_mAP", {"unit": None})
dllogger.metadata("e2e_train_time", {"unit": "s"})
dllogger.metadata("train_perf_fps", {"unit": "images/s"})
dllogger.log(step="PARAMETER", data={"gpu_count":num_gpus})
# dllogger.log(step="PARAMETER", data={"environment_info": collect_env_info()})
dllogger.log(step="PARAMETER", data={"config_file": args.config_file})
with open(args.config_file, "r") as cf:
config_str = "\n" + cf.read()
dllogger.log(step="PARAMETER", data={"config":cfg})
if args.fp16:
fp16 = True
else:
fp16 = False
model, iters_per_epoch = train(cfg, args.local_rank, args.distributed, fp16, dllogger)
if not args.skip_test:
if not cfg.PER_EPOCH_EVAL:
test_model(cfg, model, args.distributed, iters_per_epoch, dllogger)
if __name__ == "__main__":
main()
dllogger.log(step=tuple(), data={})
dllogger.flush()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tools/train_net.py |
#!/usr/bin/python
#
# Convert instances from png files to a dictionary
# This files is created according to https://github.com/facebookresearch/Detectron/issues/111
from __future__ import print_function, absolute_import, division
import os, sys
sys.path.append( os.path.normpath( os.path.join( os.path.dirname( __file__ ) , '..' , 'helpers' ) ) )
from csHelpers import *
# Cityscapes imports
from cityscapesscripts.evaluation.instance import *
from cityscapesscripts.helpers.csHelpers import *
import cv2
from maskrcnn_benchmark.utils import cv2_util
def instances2dict_with_polygons(imageFileList, verbose=False):
imgCount = 0
instanceDict = {}
if not isinstance(imageFileList, list):
imageFileList = [imageFileList]
if verbose:
print("Processing {} images...".format(len(imageFileList)))
for imageFileName in imageFileList:
# Load image
img = Image.open(imageFileName)
# Image as numpy array
imgNp = np.array(img)
# Initialize label categories
instances = {}
for label in labels:
instances[label.name] = []
# Loop through all instance ids in instance image
for instanceId in np.unique(imgNp):
if instanceId < 1000:
continue
instanceObj = Instance(imgNp, instanceId)
instanceObj_dict = instanceObj.toDict()
#instances[id2label[instanceObj.labelID].name].append(instanceObj.toDict())
if id2label[instanceObj.labelID].hasInstances:
mask = (imgNp == instanceId).astype(np.uint8)
contour, hier = cv2_util.findContours(
mask.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
polygons = [c.reshape(-1).tolist() for c in contour]
instanceObj_dict['contours'] = polygons
instances[id2label[instanceObj.labelID].name].append(instanceObj_dict)
imgKey = os.path.abspath(imageFileName)
instanceDict[imgKey] = instances
imgCount += 1
if verbose:
print("\rImages Processed: {}".format(imgCount), end=' ')
sys.stdout.flush()
if verbose:
print("")
return instanceDict
def main(argv):
fileList = []
if (len(argv) > 2):
for arg in argv:
if ("png" in arg):
fileList.append(arg)
instances2dict_with_polygons(fileList, True)
if __name__ == "__main__":
main(sys.argv[1:])
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tools/cityscapes/instances2dict_with_polygons.py |
#!/usr/bin/env python
# Copyright (c) 2017-present, Facebook, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##############################################################################
# This file is copy from https://github.com/facebookresearch/Detectron/tree/master/tools
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import argparse
import h5py
import json
import os
import scipy.misc
import sys
import cityscapesscripts.evaluation.instances2dict_with_polygons as cs
import detectron.utils.segms as segms_util
import detectron.utils.boxes as bboxs_util
def parse_args():
parser = argparse.ArgumentParser(description='Convert dataset')
parser.add_argument(
'--dataset', help="cocostuff, cityscapes", default=None, type=str)
parser.add_argument(
'--outdir', help="output dir for json files", default=None, type=str)
parser.add_argument(
'--datadir', help="data dir for annotations to be converted",
default=None, type=str)
if len(sys.argv) == 1:
parser.print_help()
sys.exit(1)
return parser.parse_args()
def convert_coco_stuff_mat(data_dir, out_dir):
"""Convert to png and save json with path. This currently only contains
the segmentation labels for objects+stuff in cocostuff - if we need to
combine with other labels from original COCO that will be a TODO."""
sets = ['train', 'val']
categories = []
json_name = 'coco_stuff_%s.json'
ann_dict = {}
for data_set in sets:
file_list = os.path.join(data_dir, '%s.txt')
images = []
with open(file_list % data_set) as f:
for img_id, img_name in enumerate(f):
img_name = img_name.replace('coco', 'COCO').strip('\n')
image = {}
mat_file = os.path.join(
data_dir, 'annotations/%s.mat' % img_name)
data = h5py.File(mat_file, 'r')
labelMap = data.get('S')
if len(categories) == 0:
labelNames = data.get('names')
for idx, n in enumerate(labelNames):
categories.append(
{"id": idx, "name": ''.join(chr(i) for i in data[
n[0]])})
ann_dict['categories'] = categories
scipy.misc.imsave(
os.path.join(data_dir, img_name + '.png'), labelMap)
image['width'] = labelMap.shape[0]
image['height'] = labelMap.shape[1]
image['file_name'] = img_name
image['seg_file_name'] = img_name
image['id'] = img_id
images.append(image)
ann_dict['images'] = images
print("Num images: %s" % len(images))
with open(os.path.join(out_dir, json_name % data_set), 'wb') as outfile:
outfile.write(json.dumps(ann_dict))
# for Cityscapes
def getLabelID(self, instID):
if (instID < 1000):
return instID
else:
return int(instID / 1000)
def convert_cityscapes_instance_only(
data_dir, out_dir):
"""Convert from cityscapes format to COCO instance seg format - polygons"""
sets = [
'gtFine_val',
'gtFine_train',
'gtFine_test',
# 'gtCoarse_train',
# 'gtCoarse_val',
# 'gtCoarse_train_extra'
]
ann_dirs = [
'gtFine_trainvaltest/gtFine/val',
'gtFine_trainvaltest/gtFine/train',
'gtFine_trainvaltest/gtFine/test',
# 'gtCoarse/train',
# 'gtCoarse/train_extra',
# 'gtCoarse/val'
]
json_name = 'instancesonly_filtered_%s.json'
ends_in = '%s_polygons.json'
img_id = 0
ann_id = 0
cat_id = 1
category_dict = {}
category_instancesonly = [
'person',
'rider',
'car',
'truck',
'bus',
'train',
'motorcycle',
'bicycle',
]
for data_set, ann_dir in zip(sets, ann_dirs):
print('Starting %s' % data_set)
ann_dict = {}
images = []
annotations = []
ann_dir = os.path.join(data_dir, ann_dir)
for root, _, files in os.walk(ann_dir):
for filename in files:
if filename.endswith(ends_in % data_set.split('_')[0]):
if len(images) % 50 == 0:
print("Processed %s images, %s annotations" % (
len(images), len(annotations)))
json_ann = json.load(open(os.path.join(root, filename)))
image = {}
image['id'] = img_id
img_id += 1
image['width'] = json_ann['imgWidth']
image['height'] = json_ann['imgHeight']
image['file_name'] = filename[:-len(
ends_in % data_set.split('_')[0])] + 'leftImg8bit.png'
image['seg_file_name'] = filename[:-len(
ends_in % data_set.split('_')[0])] + \
'%s_instanceIds.png' % data_set.split('_')[0]
images.append(image)
fullname = os.path.join(root, image['seg_file_name'])
objects = cs.instances2dict_with_polygons(
[fullname], verbose=False)[fullname]
for object_cls in objects:
if object_cls not in category_instancesonly:
continue # skip non-instance categories
for obj in objects[object_cls]:
if obj['contours'] == []:
print('Warning: empty contours.')
continue # skip non-instance categories
len_p = [len(p) for p in obj['contours']]
if min(len_p) <= 4:
print('Warning: invalid contours.')
continue # skip non-instance categories
ann = {}
ann['id'] = ann_id
ann_id += 1
ann['image_id'] = image['id']
ann['segmentation'] = obj['contours']
if object_cls not in category_dict:
category_dict[object_cls] = cat_id
cat_id += 1
ann['category_id'] = category_dict[object_cls]
ann['iscrowd'] = 0
ann['area'] = obj['pixelCount']
ann['bbox'] = bboxs_util.xyxy_to_xywh(
segms_util.polys_to_boxes(
[ann['segmentation']])).tolist()[0]
annotations.append(ann)
ann_dict['images'] = images
categories = [{"id": category_dict[name], "name": name} for name in
category_dict]
ann_dict['categories'] = categories
ann_dict['annotations'] = annotations
print("Num categories: %s" % len(categories))
print("Num images: %s" % len(images))
print("Num annotations: %s" % len(annotations))
with open(os.path.join(out_dir, json_name % data_set), 'w') as outfile:
outfile.write(json.dumps(ann_dict))
if __name__ == '__main__':
args = parse_args()
if args.dataset == "cityscapes_instance_only":
convert_cityscapes_instance_only(args.datadir, args.outdir)
elif args.dataset == "cocostuff":
convert_coco_stuff_mat(args.datadir, args.outdir)
else:
print("Dataset not supported: %s" % args.dataset)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tools/cityscapes/convert_cityscapes_to_coco.py |
import os
from IPython.lib import passwd
#c = c # pylint:disable=undefined-variable
c = get_config()
c.NotebookApp.ip = '0.0.0.0'
c.NotebookApp.port = int(os.getenv('PORT', 8888))
c.NotebookApp.open_browser = False
# sets a password if PASSWORD is set in the environment
if 'PASSWORD' in os.environ:
password = os.environ['PASSWORD']
if password:
c.NotebookApp.password = passwd(password)
else:
c.NotebookApp.password = ''
c.NotebookApp.token = ''
del os.environ['PASSWORD']
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/docker/docker-jupyter/jupyter_notebook_config.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import unittest
from maskrcnn_benchmark.utils.metric_logger import MetricLogger
class TestMetricLogger(unittest.TestCase):
def test_update(self):
meter = MetricLogger()
for i in range(10):
meter.update(metric=float(i))
m = meter.meters["metric"]
self.assertEqual(m.count, 10)
self.assertEqual(m.total, 45)
self.assertEqual(m.median, 4)
self.assertEqual(m.avg, 4.5)
def test_no_attr(self):
meter = MetricLogger()
_ = meter.meters
_ = meter.delimiter
def broken():
_ = meter.not_existent
self.assertRaises(AttributeError, broken)
if __name__ == "__main__":
unittest.main()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tests/test_metric_logger.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from collections import OrderedDict
import os
from tempfile import TemporaryDirectory
import unittest
import torch
from torch import nn
from maskrcnn_benchmark.utils.model_serialization import load_state_dict
from maskrcnn_benchmark.utils.checkpoint import Checkpointer
class TestCheckpointer(unittest.TestCase):
def create_model(self):
return nn.Sequential(nn.Linear(2, 3), nn.Linear(3, 1))
def create_complex_model(self):
m = nn.Module()
m.block1 = nn.Module()
m.block1.layer1 = nn.Linear(2, 3)
m.layer2 = nn.Linear(3, 2)
m.res = nn.Module()
m.res.layer2 = nn.Linear(3, 2)
state_dict = OrderedDict()
state_dict["layer1.weight"] = torch.rand(3, 2)
state_dict["layer1.bias"] = torch.rand(3)
state_dict["layer2.weight"] = torch.rand(2, 3)
state_dict["layer2.bias"] = torch.rand(2)
state_dict["res.layer2.weight"] = torch.rand(2, 3)
state_dict["res.layer2.bias"] = torch.rand(2)
return m, state_dict
def test_from_last_checkpoint_model(self):
# test that loading works even if they differ by a prefix
for trained_model, fresh_model in [
(self.create_model(), self.create_model()),
(nn.DataParallel(self.create_model()), self.create_model()),
(self.create_model(), nn.DataParallel(self.create_model())),
(
nn.DataParallel(self.create_model()),
nn.DataParallel(self.create_model()),
),
]:
with TemporaryDirectory() as f:
checkpointer = Checkpointer(
trained_model, save_dir=f, save_to_disk=True
)
checkpointer.save("checkpoint_file")
# in the same folder
fresh_checkpointer = Checkpointer(fresh_model, save_dir=f)
self.assertTrue(fresh_checkpointer.has_checkpoint())
self.assertEqual(
fresh_checkpointer.get_checkpoint_file(),
os.path.join(f, "checkpoint_file.pth"),
)
_ = fresh_checkpointer.load()
for trained_p, loaded_p in zip(
trained_model.parameters(), fresh_model.parameters()
):
# different tensor references
self.assertFalse(id(trained_p) == id(loaded_p))
# same content
self.assertTrue(trained_p.equal(loaded_p))
def test_from_name_file_model(self):
# test that loading works even if they differ by a prefix
for trained_model, fresh_model in [
(self.create_model(), self.create_model()),
(nn.DataParallel(self.create_model()), self.create_model()),
(self.create_model(), nn.DataParallel(self.create_model())),
(
nn.DataParallel(self.create_model()),
nn.DataParallel(self.create_model()),
),
]:
with TemporaryDirectory() as f:
checkpointer = Checkpointer(
trained_model, save_dir=f, save_to_disk=True
)
checkpointer.save("checkpoint_file")
# on different folders
with TemporaryDirectory() as g:
fresh_checkpointer = Checkpointer(fresh_model, save_dir=g)
self.assertFalse(fresh_checkpointer.has_checkpoint())
self.assertEqual(fresh_checkpointer.get_checkpoint_file(), "")
_ = fresh_checkpointer.load(os.path.join(f, "checkpoint_file.pth"))
for trained_p, loaded_p in zip(
trained_model.parameters(), fresh_model.parameters()
):
# different tensor references
self.assertFalse(id(trained_p) == id(loaded_p))
# same content
self.assertTrue(trained_p.equal(loaded_p))
def test_complex_model_loaded(self):
for add_data_parallel in [False, True]:
model, state_dict = self.create_complex_model()
if add_data_parallel:
model = nn.DataParallel(model)
load_state_dict(model, state_dict)
for loaded, stored in zip(model.state_dict().values(), state_dict.values()):
# different tensor references
self.assertFalse(id(loaded) == id(stored))
# same content
self.assertTrue(loaded.equal(stored))
if __name__ == "__main__":
unittest.main()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tests/checkpoint.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import itertools
import random
import unittest
from torch.utils.data.sampler import BatchSampler
from torch.utils.data.sampler import Sampler
from torch.utils.data.sampler import SequentialSampler
from torch.utils.data.sampler import RandomSampler
from maskrcnn_benchmark.data.samplers import GroupedBatchSampler
from maskrcnn_benchmark.data.samplers import IterationBasedBatchSampler
class SubsetSampler(Sampler):
def __init__(self, indices):
self.indices = indices
def __iter__(self):
return iter(self.indices)
def __len__(self):
return len(self.indices)
class TestGroupedBatchSampler(unittest.TestCase):
def test_respect_order_simple(self):
drop_uneven = False
dataset = [i for i in range(40)]
group_ids = [i // 10 for i in dataset]
sampler = SequentialSampler(dataset)
for batch_size in [1, 3, 5, 6]:
batch_sampler = GroupedBatchSampler(
sampler, group_ids, batch_size, drop_uneven
)
result = list(batch_sampler)
merged_result = list(itertools.chain.from_iterable(result))
self.assertEqual(merged_result, dataset)
def test_respect_order(self):
drop_uneven = False
dataset = [i for i in range(10)]
group_ids = [0, 0, 1, 0, 1, 1, 0, 1, 1, 0]
sampler = SequentialSampler(dataset)
expected = [
[[0], [1], [2], [3], [4], [5], [6], [7], [8], [9]],
[[0, 1, 3], [2, 4, 5], [6, 9], [7, 8]],
[[0, 1, 3, 6], [2, 4, 5, 7], [8], [9]],
]
for idx, batch_size in enumerate([1, 3, 4]):
batch_sampler = GroupedBatchSampler(
sampler, group_ids, batch_size, drop_uneven
)
result = list(batch_sampler)
self.assertEqual(result, expected[idx])
def test_respect_order_drop_uneven(self):
batch_size = 3
drop_uneven = True
dataset = [i for i in range(10)]
group_ids = [0, 0, 1, 0, 1, 1, 0, 1, 1, 0]
sampler = SequentialSampler(dataset)
batch_sampler = GroupedBatchSampler(sampler, group_ids, batch_size, drop_uneven)
result = list(batch_sampler)
expected = [[0, 1, 3], [2, 4, 5]]
self.assertEqual(result, expected)
def test_subset_sampler(self):
batch_size = 3
drop_uneven = False
dataset = [i for i in range(10)]
group_ids = [0, 0, 1, 0, 1, 1, 0, 1, 1, 0]
sampler = SubsetSampler([0, 3, 5, 6, 7, 8])
batch_sampler = GroupedBatchSampler(sampler, group_ids, batch_size, drop_uneven)
result = list(batch_sampler)
expected = [[0, 3, 6], [5, 7, 8]]
self.assertEqual(result, expected)
def test_permute_subset_sampler(self):
batch_size = 3
drop_uneven = False
dataset = [i for i in range(10)]
group_ids = [0, 0, 1, 0, 1, 1, 0, 1, 1, 0]
sampler = SubsetSampler([5, 0, 6, 1, 3, 8])
batch_sampler = GroupedBatchSampler(sampler, group_ids, batch_size, drop_uneven)
result = list(batch_sampler)
expected = [[5, 8], [0, 6, 1], [3]]
self.assertEqual(result, expected)
def test_permute_subset_sampler_drop_uneven(self):
batch_size = 3
drop_uneven = True
dataset = [i for i in range(10)]
group_ids = [0, 0, 1, 0, 1, 1, 0, 1, 1, 0]
sampler = SubsetSampler([5, 0, 6, 1, 3, 8])
batch_sampler = GroupedBatchSampler(sampler, group_ids, batch_size, drop_uneven)
result = list(batch_sampler)
expected = [[0, 6, 1]]
self.assertEqual(result, expected)
def test_len(self):
batch_size = 3
drop_uneven = True
dataset = [i for i in range(10)]
group_ids = [random.randint(0, 1) for _ in dataset]
sampler = RandomSampler(dataset)
batch_sampler = GroupedBatchSampler(sampler, group_ids, batch_size, drop_uneven)
result = list(batch_sampler)
self.assertEqual(len(result), len(batch_sampler))
self.assertEqual(len(result), len(batch_sampler))
batch_sampler = GroupedBatchSampler(sampler, group_ids, batch_size, drop_uneven)
batch_sampler_len = len(batch_sampler)
result = list(batch_sampler)
self.assertEqual(len(result), batch_sampler_len)
self.assertEqual(len(result), len(batch_sampler))
class TestIterationBasedBatchSampler(unittest.TestCase):
def test_number_of_iters_and_elements(self):
for batch_size in [2, 3, 4]:
for num_iterations in [4, 10, 20]:
for drop_last in [False, True]:
dataset = [i for i in range(10)]
sampler = SequentialSampler(dataset)
batch_sampler = BatchSampler(
sampler, batch_size, drop_last=drop_last
)
iter_sampler = IterationBasedBatchSampler(
batch_sampler, num_iterations
)
assert len(iter_sampler) == num_iterations
for i, batch in enumerate(iter_sampler):
start = (i % len(batch_sampler)) * batch_size
end = min(start + batch_size, len(dataset))
expected = [x for x in range(start, end)]
self.assertEqual(batch, expected)
if __name__ == "__main__":
unittest.main()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/tests/test_data_samplers.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
"""
helper class that supports empty tensors on some nn functions.
Ideally, add support directly in PyTorch to empty tensors in
those functions.
This can be removed once https://github.com/pytorch/pytorch/issues/12013
is implemented
"""
import math
import torch
from torch.nn.modules.utils import _ntuple
class _NewEmptyTensorOp(torch.autograd.Function):
@staticmethod
def forward(ctx, x, new_shape):
ctx.shape = x.shape
return x.new_empty(new_shape)
@staticmethod
def backward(ctx, grad):
shape = ctx.shape
return _NewEmptyTensorOp.apply(grad, shape), None
class Conv2d(torch.nn.Conv2d):
def forward(self, x):
if x.numel() > 0:
return super(Conv2d, self).forward(x)
# get output shape
output_shape = [
(i + 2 * p - (di * (k - 1) + 1)) // d + 1
for i, p, di, k, d in zip(
x.shape[-2:], self.padding, self.dilation, self.kernel_size, self.stride
)
]
output_shape = [x.shape[0], self.weight.shape[0]] + output_shape
return _NewEmptyTensorOp.apply(x, output_shape)
class ConvTranspose2d(torch.nn.ConvTranspose2d):
def forward(self, x):
if x.numel() > 0:
return super(ConvTranspose2d, self).forward(x)
# get output shape
output_shape = [
(i - 1) * d - 2 * p + (di * (k - 1) + 1) + op
for i, p, di, k, d, op in zip(
x.shape[-2:],
self.padding,
self.dilation,
self.kernel_size,
self.stride,
self.output_padding,
)
]
output_shape = [x.shape[0], self.bias.shape[0]] + output_shape
return _NewEmptyTensorOp.apply(x, output_shape)
def interpolate(
input, size=None, scale_factor=None, mode="nearest", align_corners=None
):
if input.numel() > 0:
return torch.nn.functional.interpolate(
input, size, scale_factor, mode, align_corners
)
def _check_size_scale_factor(dim):
if size is None and scale_factor is None:
raise ValueError("either size or scale_factor should be defined")
if size is not None and scale_factor is not None:
raise ValueError("only one of size or scale_factor should be defined")
if (
scale_factor is not None
and isinstance(scale_factor, tuple)
and len(scale_factor) != dim
):
raise ValueError(
"scale_factor shape must match input shape. "
"Input is {}D, scale_factor size is {}".format(dim, len(scale_factor))
)
def _output_size(dim):
_check_size_scale_factor(dim)
if size is not None:
return size
scale_factors = _ntuple(dim)(scale_factor)
# math.floor might return float in py2.7
return [
int(math.floor(input.size(i + 2) * scale_factors[i])) for i in range(dim)
]
output_shape = tuple(_output_size(2))
output_shape = input.shape[:-2] + output_shape
return _NewEmptyTensorOp.apply(input, output_shape)
def nhwc_to_nchw_transform(x):
if x.numel() == 0:
return x
return x.to(memory_format=torch.contiguous_format)
def nchw_to_nhwc_transform(x):
if x.numel() == 0:
return x
return x.to(memory_format=torch.channels_last) | DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/misc.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
from torch import nn
from torch.autograd import Function
from torch.autograd.function import once_differentiable
from torch.nn.modules.utils import _pair
from maskrcnn_benchmark import _C
class _ROIAlign(Function):
@staticmethod
def forward(ctx, input, roi, output_size, spatial_scale, sampling_ratio, is_nhwc):
ctx.save_for_backward(roi)
ctx.output_size = _pair(output_size)
ctx.spatial_scale = spatial_scale
ctx.sampling_ratio = sampling_ratio
ctx.input_shape = input.size()
ctx.is_nhwc = is_nhwc
output = _C.roi_align_forward(
input, roi, spatial_scale, output_size[0], output_size[1], sampling_ratio, is_nhwc
)
return output
@staticmethod
@once_differentiable
def backward(ctx, grad_output):
rois, = ctx.saved_tensors
output_size = ctx.output_size
spatial_scale = ctx.spatial_scale
sampling_ratio = ctx.sampling_ratio
bs, ch, h, w = ctx.input_shape
grad_input = _C.roi_align_backward(
grad_output,
rois,
spatial_scale,
output_size[0],
output_size[1],
bs,
ch,
h,
w,
sampling_ratio,
ctx.is_nhwc
)
return grad_input, None, None, None, None, None
roi_align = _ROIAlign.apply
class ROIAlign(nn.Module):
def __init__(self, output_size, spatial_scale, sampling_ratio, is_nhwc):
super(ROIAlign, self).__init__()
self.output_size = output_size
self.spatial_scale = spatial_scale
self.sampling_ratio = sampling_ratio
self.nhwc = is_nhwc
@torch.cuda.amp.custom_fwd(cast_inputs=torch.float32)
def forward(self, input, rois):
return roi_align(
input, rois, self.output_size, self.spatial_scale, self.sampling_ratio, self.nhwc
)
def __repr__(self):
tmpstr = self.__class__.__name__ + "("
tmpstr += "output_size=" + str(self.output_size)
tmpstr += ", spatial_scale=" + str(self.spatial_scale)
tmpstr += ", sampling_ratio=" + str(self.sampling_ratio)
tmpstr += ", is_nhwc=" + str(self.nhwc)
tmpstr += ")"
return tmpstr
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/roi_align.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
# from ._utils import _C
from maskrcnn_benchmark import _C
from torch.cuda.amp import custom_fwd
# Only valid with fp32 inputs - give AMP the hint
nms = custom_fwd(_C.nms)
# nms.__doc__ = """
# This function performs Non-maximum suppresion"""
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/nms.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
from .batch_norm import FrozenBatchNorm2d
from .misc import Conv2d
from .misc import ConvTranspose2d
from .misc import interpolate
from .misc import nhwc_to_nchw_transform, nchw_to_nhwc_transform
from .nms import nms
from .roi_align import ROIAlign
from .roi_align import roi_align
from .roi_pool import ROIPool
from .roi_pool import roi_pool
from .smooth_l1_loss import smooth_l1_loss
__all__ = ["nms", "roi_align", "ROIAlign", "roi_pool", "ROIPool",
"smooth_l1_loss", "Conv2d", "ConvTranspose2d", "interpolate",
"FrozenBatchNorm2d", "nhwc_to_nchw_transform", "nchw_to_nhwc_transform"
]
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from torch import nn
from torch.autograd import Function
from torch.autograd.function import once_differentiable
from torch.nn.modules.utils import _pair
from maskrcnn_benchmark import _C
class _ROIPool(Function):
@staticmethod
def forward(ctx, input, roi, output_size, spatial_scale):
ctx.output_size = _pair(output_size)
ctx.spatial_scale = spatial_scale
ctx.input_shape = input.size()
output, argmax = _C.roi_pool_forward(
input, roi, spatial_scale, output_size[0], output_size[1]
)
ctx.save_for_backward(input, roi, argmax)
return output
@staticmethod
@once_differentiable
def backward(ctx, grad_output):
input, rois, argmax = ctx.saved_tensors
output_size = ctx.output_size
spatial_scale = ctx.spatial_scale
bs, ch, h, w = ctx.input_shape
grad_input = _C.roi_pool_backward(
grad_output,
input,
rois,
argmax,
spatial_scale,
output_size[0],
output_size[1],
bs,
ch,
h,
w,
)
return grad_input, None, None, None
roi_pool = _ROIPool.apply
class ROIPool(nn.Module):
def __init__(self, output_size, spatial_scale):
super(ROIPool, self).__init__()
self.output_size = output_size
self.spatial_scale = spatial_scale
@torch.cuda.amp.custom_fwd(cast_inputs=torch.float32)
def forward(self, input, rois):
return roi_pool(input, rois, self.output_size, self.spatial_scale)
def __repr__(self):
tmpstr = self.__class__.__name__ + "("
tmpstr += "output_size=" + str(self.output_size)
tmpstr += ", spatial_scale=" + str(self.spatial_scale)
tmpstr += ")"
return tmpstr
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/roi_pool.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from torch import nn
class FrozenBatchNorm2d(nn.Module):
"""
BatchNorm2d where the batch statistics and the affine parameters
are fixed
"""
def __init__(self, n):
super(FrozenBatchNorm2d, self).__init__()
self.register_buffer("weight", torch.ones(n))
self.register_buffer("bias", torch.zeros(n))
self.register_buffer("running_mean", torch.zeros(n))
self.register_buffer("running_var", torch.ones(n))
def forward(self, x):
# Cast all fixed parameters to half() if necessary
if x.dtype == torch.float16:
self.weight = self.weight.half()
self.bias = self.bias.half()
self.running_mean = self.running_mean.half()
self.running_var = self.running_var.half()
scale = self.weight * self.running_var.rsqrt()
bias = self.bias - self.running_mean * scale
scale = scale.reshape(1, -1, 1, 1)
bias = bias.reshape(1, -1, 1, 1)
return x * scale + bias
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/batch_norm.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import glob
import os.path
import torch
try:
from torch.utils.cpp_extension import load as load_ext
from torch.utils.cpp_extension import CUDA_HOME
except ImportError:
raise ImportError("The cpp layer extensions requires PyTorch 0.4 or higher")
def _load_C_extensions():
this_dir = os.path.dirname(os.path.abspath(__file__))
this_dir = os.path.dirname(this_dir)
this_dir = os.path.join(this_dir, "csrc")
main_file = glob.glob(os.path.join(this_dir, "*.cpp"))
source_cpu = glob.glob(os.path.join(this_dir, "cpu", "*.cpp"))
source_cuda = glob.glob(os.path.join(this_dir, "cuda", "*.cu"))
source = main_file + source_cpu
extra_cflags = []
if torch.cuda.is_available() and CUDA_HOME is not None:
source.extend(source_cuda)
extra_cflags = ["-DWITH_CUDA"]
source = [os.path.join(this_dir, s) for s in source]
extra_include_paths = [this_dir]
return load_ext(
"torchvision",
source,
extra_cflags=extra_cflags,
extra_include_paths=extra_include_paths,
)
_C = _load_C_extensions()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/_utils.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
# TODO maybe push this to nn?
def smooth_l1_loss(input, target, beta=1. / 9, size_average=True):
"""
very similar to the smooth_l1_loss from pytorch, but with
the extra beta parameter
"""
n = torch.abs(input - target)
cond = n < beta
loss = torch.where(cond, 0.5 * n ** 2 / beta, n - 0.5 * beta)
if size_average:
return loss.mean()
return loss.sum()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/layers/smooth_l1_loss.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
import pycocotools.mask as mask_utils
# transpose
FLIP_LEFT_RIGHT = 0
FLIP_TOP_BOTTOM = 1
class Mask(object):
"""
This class is unfinished and not meant for use yet
It is supposed to contain the mask for an object as
a 2d tensor
"""
def __init__(self, masks, size, mode):
self.masks = masks
self.size = size
self.mode = mode
def transpose(self, method):
if method not in (FLIP_LEFT_RIGHT, FLIP_TOP_BOTTOM):
raise NotImplementedError(
"Only FLIP_LEFT_RIGHT and FLIP_TOP_BOTTOM implemented"
)
width, height = self.size
if method == FLIP_LEFT_RIGHT:
dim = width
idx = 2
elif method == FLIP_TOP_BOTTOM:
dim = height
idx = 1
flip_idx = list(range(dim)[::-1])
flipped_masks = self.masks.index_select(dim, flip_idx)
return Mask(flipped_masks, self.size, self.mode)
def crop(self, box):
w, h = box[2] - box[0], box[3] - box[1]
cropped_masks = self.masks[:, box[1] : box[3], box[0] : box[2]]
return Mask(cropped_masks, size=(w, h), mode=self.mode)
def resize(self, size, *args, **kwargs):
pass
class Polygons(object):
"""
This class holds a set of polygons that represents a single instance
of an object mask. The object can be represented as a set of
polygons
"""
def __init__(self, polygons, size, mode, pin_memory=False):
# assert isinstance(polygons, list), '{}'.format(polygons)
if isinstance(polygons, list):
polygons = [torch.as_tensor(p, dtype=torch.float32) for p in polygons]
if pin_memory:
polygons = [p.pin_memory() for p in polygons]
elif isinstance(polygons, Polygons):
polygons = polygons.polygons
self.polygons = polygons
self.size = size
self.mode = mode
def transpose(self, method):
if method not in (FLIP_LEFT_RIGHT, FLIP_TOP_BOTTOM):
raise NotImplementedError(
"Only FLIP_LEFT_RIGHT and FLIP_TOP_BOTTOM implemented"
)
flipped_polygons = []
width, height = self.size
if method == FLIP_LEFT_RIGHT:
dim = width
idx = 0
elif method == FLIP_TOP_BOTTOM:
dim = height
idx = 1
for poly in self.polygons:
p = poly.clone()
TO_REMOVE = 1
p[idx::2] = dim - poly[idx::2] - TO_REMOVE
flipped_polygons.append(p)
return Polygons(flipped_polygons, size=self.size, mode=self.mode)
def crop(self, box):
w, h = box[2] - box[0], box[3] - box[1]
# TODO chck if necessary
w = max(w, 1)
h = max(h, 1)
cropped_polygons = []
for poly in self.polygons:
p = poly.clone()
p[0::2] = p[0::2] - box[0] # .clamp(min=0, max=w)
p[1::2] = p[1::2] - box[1] # .clamp(min=0, max=h)
cropped_polygons.append(p)
return Polygons(cropped_polygons, size=(w, h), mode=self.mode)
def resize(self, size, *args, **kwargs):
ratios = tuple(float(s) / float(s_orig) for s, s_orig in zip(size, self.size))
if ratios[0] == ratios[1]:
ratio = ratios[0]
scaled_polys = [p * ratio for p in self.polygons]
return Polygons(scaled_polys, size, mode=self.mode)
ratio_w, ratio_h = ratios
scaled_polygons = []
for poly in self.polygons:
p = poly.clone()
p[0::2] *= ratio_w
p[1::2] *= ratio_h
scaled_polygons.append(p)
return Polygons(scaled_polygons, size=size, mode=self.mode)
def convert(self, mode):
width, height = self.size
if mode == "mask":
rles = mask_utils.frPyObjects(
[p.numpy() for p in self.polygons], height, width
)
rle = mask_utils.merge(rles)
mask = mask_utils.decode(rle)
mask = torch.from_numpy(mask)
# TODO add squeeze?
return mask
def __repr__(self):
s = self.__class__.__name__ + "("
s += "num_polygons={}, ".format(len(self.polygons))
s += "image_width={}, ".format(self.size[0])
s += "image_height={}, ".format(self.size[1])
s += "mode={})".format(self.mode)
return s
class SegmentationMask(object):
"""
This class stores the segmentations for all objects in the image
"""
def __init__(self, polygons, size, mode=None, pin_memory=False):
"""
Arguments:
polygons: a list of list of lists of numbers. The first
level of the list correspond to individual instances,
the second level to all the polygons that compose the
object, and the third level to the polygon coordinates.
"""
assert isinstance(polygons, list)
self.polygons = [Polygons(p, size, mode, pin_memory=pin_memory) for p in polygons]
self.size = size
self.mode = mode
def transpose(self, method):
if method not in (FLIP_LEFT_RIGHT, FLIP_TOP_BOTTOM):
raise NotImplementedError(
"Only FLIP_LEFT_RIGHT and FLIP_TOP_BOTTOM implemented"
)
flipped = []
for polygon in self.polygons:
flipped.append(polygon.transpose(method))
return SegmentationMask(flipped, size=self.size, mode=self.mode)
def crop(self, box):
w, h = box[2] - box[0], box[3] - box[1]
cropped = []
for polygon in self.polygons:
cropped.append(polygon.crop(box))
return SegmentationMask(cropped, size=(w, h), mode=self.mode)
def resize(self, size, *args, **kwargs):
scaled = []
for polygon in self.polygons:
scaled.append(polygon.resize(size, *args, **kwargs))
return SegmentationMask(scaled, size=size, mode=self.mode)
def to(self, *args, **kwargs):
return self
def __getitem__(self, item):
if isinstance(item, (int, slice)):
selected_polygons = [self.polygons[item]]
else:
# advanced indexing on a single dimension
selected_polygons = []
if isinstance(item, torch.Tensor) and \
(item.dtype == torch.uint8 or item.dtype == torch.bool):
item = item.nonzero()
item = item.squeeze(1) if item.numel() > 0 else item
item = item.tolist()
for i in item:
selected_polygons.append(self.polygons[i])
return SegmentationMask(selected_polygons, size=self.size, mode=self.mode)
def __iter__(self):
return iter(self.polygons)
def __repr__(self):
s = self.__class__.__name__ + "("
s += "num_instances={}, ".format(len(self.polygons))
s += "image_width={}, ".format(self.size[0])
s += "image_height={})".format(self.size[1])
return s
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/structures/segmentation_mask.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from .bounding_box import BoxList
from maskrcnn_benchmark.layers import nms as _box_nms
from maskrcnn_benchmark import _C
def boxlist_nms(boxlist, nms_thresh, max_proposals=-1, score_field="score"):
"""
Performs non-maximum suppression on a boxlist, with scores specified
in a boxlist field via score_field.
Arguments:
boxlist(BoxList)
nms_thresh (float)
max_proposals (int): if > 0, then only the top max_proposals are kept
after non-maxium suppression
score_field (str)
"""
if nms_thresh <= 0:
return boxlist
mode = boxlist.mode
boxlist = boxlist.convert("xyxy")
boxes = boxlist.bbox
score = boxlist.get_field(score_field)
keep = _box_nms(boxes, score, nms_thresh)
if max_proposals > 0:
keep = keep[: max_proposals]
boxlist = boxlist[keep]
return boxlist.convert(mode)
def remove_small_boxes(boxlist, min_size):
"""
Only keep boxes with both sides >= min_size
Arguments:
boxlist (Boxlist)
min_size (int)
"""
# TODO maybe add an API for querying the ws / hs
xywh_boxes = boxlist.convert("xywh").bbox
_, _, ws, hs = xywh_boxes.unbind(dim=1)
keep = (
(ws >= min_size) & (hs >= min_size)
).nonzero().squeeze(1)
return boxlist[keep]
# implementation from https://github.com/kuangliu/torchcv/blob/master/torchcv/utils/box.py
# with slight modifications
def boxlist_iou(boxlist1, boxlist2):
"""Compute the intersection over union of two set of boxes.
The box order must be (xmin, ymin, xmax, ymax).
Arguments:
box1: (BoxList) bounding boxes, sized [N,4].
box2: (BoxList) bounding boxes, sized [M,4].
Returns:
(tensor) iou, sized [N,M].
Reference:
https://github.com/chainer/chainercv/blob/master/chainercv/utils/bbox/bbox_iou.py
"""
if boxlist1.size != boxlist2.size:
raise RuntimeError(
"boxlists should have same image size, got {}, {}".format(boxlist1, boxlist2))
box1, box2 = boxlist1.bbox, boxlist2.bbox
if (box1.is_cuda and box2.is_cuda):
iou = _C.box_iou(box1,box2)
else:
N = len(boxlist1)
M = len(boxlist2)
area1 = boxlist1.area()
area2 = boxlist2.area()
lt = torch.max(box1[:, None, :2], box2[:, :2]) # [N,M,2]
rb = torch.min(box1[:, None, 2:], box2[:, 2:]) # [N,M,2]
TO_REMOVE = 1
wh = (rb - lt + TO_REMOVE).clamp(min=0) # [N,M,2]
inter = wh[:, :, 0] * wh[:, :, 1] # [N,M]
iou = inter / (area1[:, None] + area2 - inter)
return iou
# TODO redundant, remove
def _cat(tensors, dim=0):
"""
Efficient version of torch.cat that avoids a copy if there is only a single element in a list
"""
assert isinstance(tensors, (list, tuple))
if len(tensors) == 1:
return tensors[0]
return torch.cat(tensors, dim)
def cat_boxlist(bboxes):
"""
Concatenates a list of BoxList (having the same image size) into a
single BoxList
Arguments:
bboxes (list[BoxList])
"""
assert isinstance(bboxes, (list, tuple))
assert all(isinstance(bbox, BoxList) for bbox in bboxes)
size = bboxes[0].size
assert all(bbox.size == size for bbox in bboxes)
mode = bboxes[0].mode
assert all(bbox.mode == mode for bbox in bboxes)
fields = set(bboxes[0].fields())
assert all(set(bbox.fields()) == fields for bbox in bboxes)
cat_boxes = BoxList(_cat([bbox.bbox for bbox in bboxes], dim=0), size, mode)
for field in fields:
data = _cat([bbox.get_field(field) for bbox in bboxes], dim=0)
cat_boxes.add_field(field, data)
return cat_boxes
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/structures/boxlist_ops.py |
DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/structures/__init__.py |
|
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
# transpose
FLIP_LEFT_RIGHT = 0
FLIP_TOP_BOTTOM = 1
class BoxList(object):
"""
This class represents a set of bounding boxes.
The bounding boxes are represented as a Nx4 Tensor.
In order to uniquely determine the bounding boxes with respect
to an image, we also store the corresponding image dimensions.
They can contain extra information that is specific to each bounding box, such as
labels.
"""
def __init__(self, bbox, image_size, mode="xyxy"):
device = bbox.device if isinstance(bbox, torch.Tensor) else torch.device("cpu")
bbox = torch.as_tensor(bbox, dtype=torch.float32, device=device)
if bbox.ndimension() != 2:
raise ValueError(
"bbox should have 2 dimensions, got {}".format(bbox.ndimension())
)
if bbox.size(-1) != 4:
raise ValueError(
"last dimenion of bbox should have a "
"size of 4, got {}".format(bbox.size(-1))
)
if mode not in ("xyxy", "xywh"):
raise ValueError("mode should be 'xyxy' or 'xywh'")
self.bbox = bbox
self.size = image_size # (image_width, image_height)
self.mode = mode
self.extra_fields = {}
def add_field(self, field, field_data):
self.extra_fields[field] = field_data
def get_field(self, field):
return self.extra_fields[field]
def has_field(self, field):
return field in self.extra_fields
def fields(self):
return list(self.extra_fields.keys())
def _copy_extra_fields(self, bbox):
for k, v in bbox.extra_fields.items():
self.extra_fields[k] = v
def convert(self, mode):
if mode not in ("xyxy", "xywh"):
raise ValueError("mode should be 'xyxy' or 'xywh'")
if mode == self.mode:
return self
# we only have two modes, so don't need to check
# self.mode
xmin, ymin, xmax, ymax = self._split_into_xyxy()
if mode == "xyxy":
bbox = torch.cat((xmin, ymin, xmax, ymax), dim=-1)
bbox = BoxList(bbox, self.size, mode=mode)
else:
TO_REMOVE = 1
bbox = torch.cat(
(xmin, ymin, xmax - xmin + TO_REMOVE, ymax - ymin + TO_REMOVE), dim=-1
)
bbox = BoxList(bbox, self.size, mode=mode)
bbox._copy_extra_fields(self)
return bbox
def _split_into_xyxy(self):
if self.mode == "xyxy":
xmin, ymin, xmax, ymax = self.bbox.split(1, dim=-1)
return xmin, ymin, xmax, ymax
elif self.mode == "xywh":
TO_REMOVE = 1
xmin, ymin, w, h = self.bbox.split(1, dim=-1)
return (
xmin,
ymin,
xmin + (w - TO_REMOVE).clamp(min=0),
ymin + (h - TO_REMOVE).clamp(min=0),
)
else:
raise RuntimeError("Should not be here")
def resize(self, size, *args, **kwargs):
"""
Returns a resized copy of this bounding box
:param size: The requested size in pixels, as a 2-tuple:
(width, height).
"""
ratios = tuple(float(s) / float(s_orig) for s, s_orig in zip(size, self.size))
if ratios[0] == ratios[1]:
ratio = ratios[0]
scaled_box = self.bbox * ratio
bbox = BoxList(scaled_box, size, mode=self.mode)
# bbox._copy_extra_fields(self)
for k, v in self.extra_fields.items():
if not isinstance(v, torch.Tensor):
v = v.resize(size, *args, **kwargs)
bbox.add_field(k, v)
return bbox
ratio_width, ratio_height = ratios
xmin, ymin, xmax, ymax = self._split_into_xyxy()
scaled_xmin = xmin * ratio_width
scaled_xmax = xmax * ratio_width
scaled_ymin = ymin * ratio_height
scaled_ymax = ymax * ratio_height
scaled_box = torch.cat(
(scaled_xmin, scaled_ymin, scaled_xmax, scaled_ymax), dim=-1
)
bbox = BoxList(scaled_box, size, mode="xyxy")
# bbox._copy_extra_fields(self)
for k, v in self.extra_fields.items():
if not isinstance(v, torch.Tensor):
v = v.resize(size, *args, **kwargs)
bbox.add_field(k, v)
return bbox.convert(self.mode)
def transpose(self, method):
"""
Transpose bounding box (flip or rotate in 90 degree steps)
:param method: One of :py:attr:`PIL.Image.FLIP_LEFT_RIGHT`,
:py:attr:`PIL.Image.FLIP_TOP_BOTTOM`, :py:attr:`PIL.Image.ROTATE_90`,
:py:attr:`PIL.Image.ROTATE_180`, :py:attr:`PIL.Image.ROTATE_270`,
:py:attr:`PIL.Image.TRANSPOSE` or :py:attr:`PIL.Image.TRANSVERSE`.
"""
if method not in (FLIP_LEFT_RIGHT, FLIP_TOP_BOTTOM):
raise NotImplementedError(
"Only FLIP_LEFT_RIGHT and FLIP_TOP_BOTTOM implemented"
)
image_width, image_height = self.size
xmin, ymin, xmax, ymax = self._split_into_xyxy()
if method == FLIP_LEFT_RIGHT:
TO_REMOVE = 1
transposed_xmin = image_width - xmax - TO_REMOVE
transposed_xmax = image_width - xmin - TO_REMOVE
transposed_ymin = ymin
transposed_ymax = ymax
elif method == FLIP_TOP_BOTTOM:
transposed_xmin = xmin
transposed_xmax = xmax
transposed_ymin = image_height - ymax
transposed_ymax = image_height - ymin
transposed_boxes = torch.cat(
(transposed_xmin, transposed_ymin, transposed_xmax, transposed_ymax), dim=-1
)
bbox = BoxList(transposed_boxes, self.size, mode="xyxy")
# bbox._copy_extra_fields(self)
for k, v in self.extra_fields.items():
if not isinstance(v, torch.Tensor):
v = v.transpose(method)
bbox.add_field(k, v)
return bbox.convert(self.mode)
def crop(self, box):
"""
Cropss a rectangular region from this bounding box. The box is a
4-tuple defining the left, upper, right, and lower pixel
coordinate.
"""
xmin, ymin, xmax, ymax = self._split_into_xyxy()
w, h = box[2] - box[0], box[3] - box[1]
cropped_xmin = (xmin - box[0]).clamp(min=0, max=w)
cropped_ymin = (ymin - box[1]).clamp(min=0, max=h)
cropped_xmax = (xmax - box[0]).clamp(min=0, max=w)
cropped_ymax = (ymax - box[1]).clamp(min=0, max=h)
# TODO should I filter empty boxes here?
if False:
is_empty = (cropped_xmin == cropped_xmax) | (cropped_ymin == cropped_ymax)
cropped_box = torch.cat(
(cropped_xmin, cropped_ymin, cropped_xmax, cropped_ymax), dim=-1
)
bbox = BoxList(cropped_box, (w, h), mode="xyxy")
# bbox._copy_extra_fields(self)
for k, v in self.extra_fields.items():
if not isinstance(v, torch.Tensor):
v = v.crop(box)
bbox.add_field(k, v)
return bbox.convert(self.mode)
# Tensor-like methods
def to(self, device, **kwargs):
bbox = BoxList(self.bbox.to(device, non_blocking=True), self.size, self.mode)
for k, v in self.extra_fields.items():
if hasattr(v, "to"):
if torch.is_tensor(v):
v_tmp = torch.empty_like(v, device=device)
v_tmp.copy_(v, **kwargs)
v = v_tmp
else:
v = v.to(device, **kwargs)
bbox.add_field(k, v)
return bbox
def pin_memory(self):
bbox = BoxList(self.bbox.pin_memory(), self.size, self.mode)
for k, v in self.extra_fields.items():
if hasattr(v, "pin_memory"):
v = v.pin_memory()
bbox.add_field(k, v)
return bbox
def __getitem__(self, item):
bbox = BoxList(self.bbox[item], self.size, self.mode)
for k, v in self.extra_fields.items():
bbox.add_field(k, v[item])
return bbox
def __len__(self):
return self.bbox.shape[0]
def clip_to_image(self, remove_empty=True):
TO_REMOVE = 1
self.bbox[:, 0].clamp_(min=0, max=self.size[0] - TO_REMOVE)
self.bbox[:, 1].clamp_(min=0, max=self.size[1] - TO_REMOVE)
self.bbox[:, 2].clamp_(min=0, max=self.size[0] - TO_REMOVE)
self.bbox[:, 3].clamp_(min=0, max=self.size[1] - TO_REMOVE)
if remove_empty:
box = self.bbox
keep = (box[:, 3] > box[:, 1]) & (box[:, 2] > box[:, 0])
return self[keep]
return self
def area(self):
box = self.bbox
if self.mode == "xyxy":
TO_REMOVE = 1
area = (box[:, 2] - box[:, 0] + TO_REMOVE) * (box[:, 3] - box[:, 1] + TO_REMOVE)
elif self.mode == "xywh":
area = box[:, 2] * box[:, 3]
else:
raise RuntimeError("Should not be here")
return area
def copy_with_fields(self, fields):
bbox = BoxList(self.bbox, self.size, self.mode)
if not isinstance(fields, (list, tuple)):
fields = [fields]
for field in fields:
bbox.add_field(field, self.get_field(field))
return bbox
def __repr__(self):
s = self.__class__.__name__ + "("
s += "num_boxes={}, ".format(len(self))
s += "image_width={}, ".format(self.size[0])
s += "image_height={}, ".format(self.size[1])
s += "mode={})".format(self.mode)
return s
if __name__ == "__main__":
bbox = BoxList([[0, 0, 10, 10], [0, 0, 5, 5]], (10, 10))
s_bbox = bbox.resize((5, 5))
print(s_bbox)
print(s_bbox.bbox)
t_bbox = bbox.transpose(0)
print(t_bbox)
print(t_bbox.bbox)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/structures/bounding_box.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
from __future__ import division
import torch
class ImageList(object):
"""
Structure that holds a list of images (of possibly
varying sizes) as a single tensor.
This works by padding the images to the same size,
and storing in a field the original sizes of each image
"""
def __init__(self, tensors, image_sizes):
"""
Arguments:
tensors (tensor)
image_sizes (list[tuple[int, int]])
"""
self.tensors = tensors
self.image_sizes = image_sizes
def to(self, *args, **kwargs):
cast_tensor = self.tensors.to(*args, **kwargs)
return ImageList(cast_tensor, self.image_sizes)
def to_nhwc(self):
nhwc_tensor = self.tensors.to(memory_format=torch.channels_last)
return ImageList(nhwc_tensor, self.image_sizes)
def to_image_list(tensors, size_divisible=0):
"""
tensors can be an ImageList, a torch.Tensor or
an iterable of Tensors. It can't be a numpy array.
When tensors is an iterable of Tensors, it pads
the Tensors with zeros so that they have the same
shape
"""
if isinstance(tensors, torch.Tensor) and size_divisible > 0:
tensors = [tensors]
if isinstance(tensors, ImageList):
return tensors
elif isinstance(tensors, torch.Tensor):
# single tensor shape can be inferred
assert tensors.dim() == 4
image_sizes = [tensor.shape[-2:] for tensor in tensors]
return ImageList(tensors, image_sizes)
elif isinstance(tensors, (tuple, list)):
max_size = tuple(max(s) for s in zip(*[img.shape for img in tensors]))
# TODO Ideally, just remove this and let me model handle arbitrary
# input sizs
if size_divisible > 0:
import math
stride = size_divisible
max_size = list(max_size)
max_size[1] = int(math.ceil(max_size[1] / stride) * stride)
max_size[2] = int(math.ceil(max_size[2] / stride) * stride)
max_size = tuple(max_size)
batch_shape = (len(tensors),) + max_size
batched_imgs = tensors[0].new(*batch_shape).zero_()
for img, pad_img in zip(tensors, batched_imgs):
pad_img[: img.shape[0], : img.shape[1], : img.shape[2]].copy_(img)
image_sizes = [im.shape[-2:] for im in tensors]
return ImageList(batched_imgs, image_sizes)
else:
raise TypeError("Unsupported type for to_image_list: {}".format(type(tensors)))
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/structures/image_list.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
"""Centralized catalog of paths."""
import os
class DatasetCatalog(object):
DATA_DIR = "/data/coco/coco-2014"
DATASETS = {
"coco_2014_train": {
"img_dir": "coco_train2014",
"ann_file": "annotations/instances_train2014.json"
},
"coco_2014_val": {
"img_dir": "coco_val2014",
"ann_file": "annotations/instances_val2014.json"
},
"coco_2014_minival": {
"img_dir": "coco_val2014",
"ann_file": "annotations/instances_minival2014.json"
},
"coco_2014_valminusminival": {
"img_dir": "coco_val2014",
"ann_file": "annotations/instances_valminusminival2014.json"
},
}
@staticmethod
def get(name):
if "coco" in name:
data_dir = DatasetCatalog.DATA_DIR
attrs = DatasetCatalog.DATASETS[name]
args = dict(
root=os.path.join(data_dir, attrs["img_dir"]),
ann_file=os.path.join(data_dir, attrs["ann_file"]),
)
return dict(
factory="COCODataset",
args=args,
)
elif "voc" in name:
data_dir = DatasetCatalog.DATA_DIR
attrs = DatasetCatalog.DATASETS[name]
args = dict(
data_dir=os.path.join(data_dir, attrs["data_dir"]),
split=attrs["split"],
)
return dict(
factory="PascalVOCDataset",
args=args,
)
raise RuntimeError("Dataset not available: {}".format(name))
class ModelCatalog(object):
S3_C2_DETECTRON_URL = "https://dl.fbaipublicfiles.com/detectron"
C2_IMAGENET_MODELS = {
"MSRA/R-50": "ImageNetPretrained/MSRA/R-50.pkl",
"MSRA/R-50-GN": "ImageNetPretrained/47261647/R-50-GN.pkl",
"MSRA/R-101": "ImageNetPretrained/MSRA/R-101.pkl",
"MSRA/R-101-GN": "ImageNetPretrained/47592356/R-101-GN.pkl",
"FAIR/20171220/X-101-32x8d": "ImageNetPretrained/20171220/X-101-32x8d.pkl",
}
C2_DETECTRON_SUFFIX = "output/train/coco_2014_train%3Acoco_2014_valminusminival/generalized_rcnn/model_final.pkl"
C2_DETECTRON_MODELS = {
"35857197/e2e_faster_rcnn_R-50-C4_1x": "01_33_49.iAX0mXvW",
"35857345/e2e_faster_rcnn_R-50-FPN_1x": "01_36_30.cUF7QR7I",
"35857890/e2e_faster_rcnn_R-101-FPN_1x": "01_38_50.sNxI7sX7",
"36761737/e2e_faster_rcnn_X-101-32x8d-FPN_1x": "06_31_39.5MIHi1fZ",
"35858791/e2e_mask_rcnn_R-50-C4_1x": "01_45_57.ZgkA7hPB",
"35858933/e2e_mask_rcnn_R-50-FPN_1x": "01_48_14.DzEQe4wC",
"35861795/e2e_mask_rcnn_R-101-FPN_1x": "02_31_37.KqyEK4tT",
"36761843/e2e_mask_rcnn_X-101-32x8d-FPN_1x": "06_35_59.RZotkLKI",
}
@staticmethod
def get(name):
if name.startswith("Caffe2Detectron/COCO"):
return ModelCatalog.get_c2_detectron_12_2017_baselines(name)
if name.startswith("ImageNetPretrained"):
return ModelCatalog.get_c2_imagenet_pretrained(name)
raise RuntimeError("model not present in the catalog {}".format(name))
@staticmethod
def get_c2_imagenet_pretrained(name):
prefix = ModelCatalog.S3_C2_DETECTRON_URL
name = name[len("ImageNetPretrained/"):]
name = ModelCatalog.C2_IMAGENET_MODELS[name]
url = "/".join([prefix, name])
return url
@staticmethod
def get_c2_detectron_12_2017_baselines(name):
# Detectron C2 models are stored following the structure
# prefix/<model_id>/2012_2017_baselines/<model_name>.yaml.<signature>/suffix
# we use as identifiers in the catalog Caffe2Detectron/COCO/<model_id>/<model_name>
prefix = ModelCatalog.S3_C2_DETECTRON_URL
suffix = ModelCatalog.C2_DETECTRON_SUFFIX
# remove identification prefix
name = name[len("Caffe2Detectron/COCO/"):]
# split in <model_id> and <model_name>
model_id, model_name = name.split("/")
# parsing to make it match the url address from the Caffe2 models
model_name = "{}.yaml".format(model_name)
signature = ModelCatalog.C2_DETECTRON_MODELS[name]
unique_name = ".".join([model_name, signature])
url = "/".join([prefix, model_id, "12_2017_baselines", unique_name, suffix])
return url
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/config/paths_catalog_dlfw_ci.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
"""Centralized catalog of paths."""
import os
class DatasetCatalog(object):
DATA_DIR = "/data2/coco/coco-2017"
DATASETS = {
"coco_2017_train": {
"img_dir": "train2017",
"ann_file": "annotations/instances_train2017.json"
},
"coco_2017_val": {
"img_dir": "val2017",
"ann_file": "annotations/instances_val2017.json"
},
}
@staticmethod
def get(name):
if "coco" in name:
data_dir = DatasetCatalog.DATA_DIR
attrs = DatasetCatalog.DATASETS[name]
args = dict(
root=os.path.join(data_dir, attrs["img_dir"]),
ann_file=os.path.join(data_dir, attrs["ann_file"]),
)
return dict(
factory="COCODataset",
args=args,
)
elif "voc" in name:
data_dir = DatasetCatalog.DATA_DIR
attrs = DatasetCatalog.DATASETS[name]
args = dict(
data_dir=os.path.join(data_dir, attrs["data_dir"]),
split=attrs["split"],
)
return dict(
factory="PascalVOCDataset",
args=args,
)
raise RuntimeError("Dataset not available: {}".format(name))
class ModelCatalog(object):
S3_C2_DETECTRON_URL = "https://dl.fbaipublicfiles.com/detectron"
C2_IMAGENET_MODELS = {
"MSRA/R-50": "ImageNetPretrained/MSRA/R-50.pkl",
"MSRA/R-50-GN": "ImageNetPretrained/47261647/R-50-GN.pkl",
"MSRA/R-101": "ImageNetPretrained/MSRA/R-101.pkl",
"MSRA/R-101-GN": "ImageNetPretrained/47592356/R-101-GN.pkl",
"FAIR/20171220/X-101-32x8d": "ImageNetPretrained/20171220/X-101-32x8d.pkl",
}
C2_DETECTRON_SUFFIX = "output/train/coco_2014_train%3Acoco_2014_valminusminival/generalized_rcnn/model_final.pkl"
C2_DETECTRON_MODELS = {
"35857197/e2e_faster_rcnn_R-50-C4_1x": "01_33_49.iAX0mXvW",
"35857345/e2e_faster_rcnn_R-50-FPN_1x": "01_36_30.cUF7QR7I",
"35857890/e2e_faster_rcnn_R-101-FPN_1x": "01_38_50.sNxI7sX7",
"36761737/e2e_faster_rcnn_X-101-32x8d-FPN_1x": "06_31_39.5MIHi1fZ",
"35858791/e2e_mask_rcnn_R-50-C4_1x": "01_45_57.ZgkA7hPB",
"35858933/e2e_mask_rcnn_R-50-FPN_1x": "01_48_14.DzEQe4wC",
"35861795/e2e_mask_rcnn_R-101-FPN_1x": "02_31_37.KqyEK4tT",
"36761843/e2e_mask_rcnn_X-101-32x8d-FPN_1x": "06_35_59.RZotkLKI",
}
@staticmethod
def get(name):
if name.startswith("Caffe2Detectron/COCO"):
return ModelCatalog.get_c2_detectron_12_2017_baselines(name)
if name.startswith("ImageNetPretrained"):
return ModelCatalog.get_c2_imagenet_pretrained(name)
raise RuntimeError("model not present in the catalog {}".format(name))
@staticmethod
def get_c2_imagenet_pretrained(name):
prefix = ModelCatalog.S3_C2_DETECTRON_URL
name = name[len("ImageNetPretrained/"):]
name = ModelCatalog.C2_IMAGENET_MODELS[name]
url = "/".join([prefix, name])
return url
@staticmethod
def get_c2_detectron_12_2017_baselines(name):
# Detectron C2 models are stored following the structure
# prefix/<model_id>/2012_2017_baselines/<model_name>.yaml.<signature>/suffix
# we use as identifiers in the catalog Caffe2Detectron/COCO/<model_id>/<model_name>
prefix = ModelCatalog.S3_C2_DETECTRON_URL
suffix = ModelCatalog.C2_DETECTRON_SUFFIX
# remove identification prefix
name = name[len("Caffe2Detectron/COCO/"):]
# split in <model_id> and <model_name>
model_id, model_name = name.split("/")
# parsing to make it match the url address from the Caffe2 models
model_name = "{}.yaml".format(model_name)
signature = ModelCatalog.C2_DETECTRON_MODELS[name]
unique_name = ".".join([model_name, signature])
url = "/".join([prefix, model_id, "12_2017_baselines", unique_name, suffix])
return url
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/config/paths_catalog_ci.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from .defaults import _C as cfg
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/config/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
"""Centralized catalog of paths."""
import os
class DatasetCatalog(object):
DATA_DIR = "/datasets"
DATASETS = {
"coco_2017_train": {
"img_dir": "data/train2017",
"ann_file": "data/annotations/instances_train2017.json"
},
"coco_2017_val": {
"img_dir": "data/val2017",
"ann_file": "data/annotations/instances_val2017.json"
},
"coco_2014_train": {
"img_dir": "data/train2014",
"ann_file": "data/annotations/instances_train2014.json"
},
"coco_2014_val": {
"img_dir": "data/val2014",
"ann_file": "data/annotations/instances_val2014.json"
},
"coco_2014_minival": {
"img_dir": "data/val2014",
"ann_file": "data/annotations/instances_minival2014.json"
},
"coco_2014_valminusminival": {
"img_dir": "data/val2014",
"ann_file": "data/annotations/instances_valminusminival2014.json"
},
"voc_2007_train": {
"data_dir": "data/VOC2007",
"split": "train"
},
"voc_2007_train_cocostyle": {
"img_dir": "data/VOC2007/JPEGImages",
"ann_file": "data/VOC2007/Annotations/pascal_train2007.json"
},
"voc_2007_val": {
"data_dir": "data/VOC2007",
"split": "val"
},
"voc_2007_val_cocostyle": {
"img_dir": "data/VOC2007/JPEGImages",
"ann_file": "data/VOC2007/Annotations/pascal_val2007.json"
},
"voc_2007_test": {
"data_dir": "data/VOC2007",
"split": "test"
},
"voc_2007_test_cocostyle": {
"img_dir": "data/VOC2007/JPEGImages",
"ann_file": "data/VOC2007/Annotations/pascal_test2007.json"
},
"voc_2012_train": {
"data_dir": "data/VOC2012",
"split": "train"
},
"voc_2012_train_cocostyle": {
"img_dir": "data/VOC2012/JPEGImages",
"ann_file": "data/VOC2012/Annotations/pascal_train2012.json"
},
"voc_2012_val": {
"data_dir": "data/VOC2012",
"split": "val"
},
"voc_2012_val_cocostyle": {
"img_dir": "data/VOC2012/JPEGImages",
"ann_file": "data/VOC2012/Annotations/pascal_val2012.json"
},
"voc_2012_test": {
"data_dir": "data/VOC2012",
"split": "test"
# PASCAL VOC2012 doesn't made the test annotations available, so there's no json annotation
},
"cityscapes_fine_instanceonly_seg_train_cocostyle": {
"img_dir": "data/images",
"ann_file": "data/annotations/instancesonly_filtered_gtFine_train.json"
},
"cityscapes_fine_instanceonly_seg_val_cocostyle": {
"img_dir": "data/images",
"ann_file": "data/annotations/instancesonly_filtered_gtFine_val.json"
},
"cityscapes_fine_instanceonly_seg_test_cocostyle": {
"img_dir": "data/images",
"ann_file": "data/annotations/instancesonly_filtered_gtFine_test.json"
}
}
@staticmethod
def get(name):
if "coco" in name:
data_dir = DatasetCatalog.DATA_DIR
attrs = DatasetCatalog.DATASETS[name]
args = dict(
root=os.path.join(data_dir, attrs["img_dir"]),
ann_file=os.path.join(data_dir, attrs["ann_file"]),
)
return dict(
factory="COCODataset",
args=args,
)
elif "voc" in name:
data_dir = DatasetCatalog.DATA_DIR
attrs = DatasetCatalog.DATASETS[name]
args = dict(
data_dir=os.path.join(data_dir, attrs["data_dir"]),
split=attrs["split"],
)
return dict(
factory="PascalVOCDataset",
args=args,
)
raise RuntimeError("Dataset not available: {}".format(name))
class ModelCatalog(object):
S3_C2_DETECTRON_URL = "https://dl.fbaipublicfiles.com/detectron"
C2_IMAGENET_MODELS = {
"MSRA/R-50": "ImageNetPretrained/MSRA/R-50.pkl",
"MSRA/R-50-GN": "ImageNetPretrained/47261647/R-50-GN.pkl",
"MSRA/R-101": "ImageNetPretrained/MSRA/R-101.pkl",
"MSRA/R-101-GN": "ImageNetPretrained/47592356/R-101-GN.pkl",
"FAIR/20171220/X-101-32x8d": "ImageNetPretrained/20171220/X-101-32x8d.pkl",
}
C2_DETECTRON_SUFFIX = "output/train/coco_2014_train%3Acoco_2014_valminusminival/generalized_rcnn/model_final.pkl"
C2_DETECTRON_MODELS = {
"35857197/e2e_faster_rcnn_R-50-C4_1x": "01_33_49.iAX0mXvW",
"35857345/e2e_faster_rcnn_R-50-FPN_1x": "01_36_30.cUF7QR7I",
"35857890/e2e_faster_rcnn_R-101-FPN_1x": "01_38_50.sNxI7sX7",
"36761737/e2e_faster_rcnn_X-101-32x8d-FPN_1x": "06_31_39.5MIHi1fZ",
"35858791/e2e_mask_rcnn_R-50-C4_1x": "01_45_57.ZgkA7hPB",
"35858933/e2e_mask_rcnn_R-50-FPN_1x": "01_48_14.DzEQe4wC",
"35861795/e2e_mask_rcnn_R-101-FPN_1x": "02_31_37.KqyEK4tT",
"36761843/e2e_mask_rcnn_X-101-32x8d-FPN_1x": "06_35_59.RZotkLKI",
}
@staticmethod
def get(name):
if name.startswith("Caffe2Detectron/COCO"):
return ModelCatalog.get_c2_detectron_12_2017_baselines(name)
if name.startswith("ImageNetPretrained"):
return ModelCatalog.get_c2_imagenet_pretrained(name)
raise RuntimeError("model not present in the catalog {}".format(name))
@staticmethod
def get_c2_imagenet_pretrained(name):
prefix = ModelCatalog.S3_C2_DETECTRON_URL
name = name[len("ImageNetPretrained/"):]
name = ModelCatalog.C2_IMAGENET_MODELS[name]
url = "/".join([prefix, name])
return url
@staticmethod
def get_c2_detectron_12_2017_baselines(name):
# Detectron C2 models are stored following the structure
# prefix/<model_id>/2012_2017_baselines/<model_name>.yaml.<signature>/suffix
# we use as identifiers in the catalog Caffe2Detectron/COCO/<model_id>/<model_name>
prefix = ModelCatalog.S3_C2_DETECTRON_URL
suffix = ModelCatalog.C2_DETECTRON_SUFFIX
# remove identification prefix
name = name[len("Caffe2Detectron/COCO/"):]
# split in <model_id> and <model_name>
model_id, model_name = name.split("/")
# parsing to make it match the url address from the Caffe2 models
model_name = "{}.yaml".format(model_name)
signature = ModelCatalog.C2_DETECTRON_MODELS[name]
unique_name = ".".join([model_name, signature])
url = "/".join([prefix, model_id, "12_2017_baselines", unique_name, suffix])
return url
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/config/paths_catalog.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import os
from yacs.config import CfgNode as CN
# -----------------------------------------------------------------------------
# Convention about Training / Test specific parameters
# -----------------------------------------------------------------------------
# Whenever an argument can be either used for training or for testing, the
# corresponding name will be post-fixed by a _TRAIN for a training parameter,
# or _TEST for a test-specific parameter.
# For example, the number of images during training will be
# IMAGES_PER_BATCH_TRAIN, while the number of images for testing will be
# IMAGES_PER_BATCH_TEST
# -----------------------------------------------------------------------------
# Config definition
# -----------------------------------------------------------------------------
_C = CN()
_C.MODEL = CN()
_C.MODEL.RPN_ONLY = False
_C.MODEL.MASK_ON = False
_C.MODEL.DEVICE = "cuda"
_C.MODEL.META_ARCHITECTURE = "GeneralizedRCNN"
# If the WEIGHT starts with a catalog://, like :R-50, the code will look for
# the path in paths_catalog. Else, it will use it as the specified absolute
# path
_C.MODEL.WEIGHT = ""
# -----------------------------------------------------------------------------
# INPUT
# -----------------------------------------------------------------------------
_C.INPUT = CN()
# Size of the smallest side of the image during training
_C.INPUT.MIN_SIZE_TRAIN = 800 # (800,)
# Maximum size of the side of the image during training
_C.INPUT.MAX_SIZE_TRAIN = 1333
# Size of the smallest side of the image during testing
_C.INPUT.MIN_SIZE_TEST = 800
# Maximum size of the side of the image during testing
_C.INPUT.MAX_SIZE_TEST = 1333
# Values to be used for image normalization
_C.INPUT.PIXEL_MEAN = [102.9801, 115.9465, 122.7717]
# Values to be used for image normalization
_C.INPUT.PIXEL_STD = [1., 1., 1.]
# Convert image to BGR format (for Caffe2 models), in range 0-255
_C.INPUT.TO_BGR255 = True
# -----------------------------------------------------------------------------
# Dataset
# -----------------------------------------------------------------------------
_C.DATASETS = CN()
# List of the dataset names for training, as present in paths_catalog.py
_C.DATASETS.TRAIN = ()
# List of the dataset names for testing, as present in paths_catalog.py
_C.DATASETS.TEST = ()
# -----------------------------------------------------------------------------
# DataLoader
# -----------------------------------------------------------------------------
_C.DATALOADER = CN()
# Number of data loading threads
_C.DATALOADER.NUM_WORKERS = 4
# If > 0, this enforces that each collated batch should have a size divisible
# by SIZE_DIVISIBILITY
_C.DATALOADER.SIZE_DIVISIBILITY = 0
# If True, each batch should contain only images for which the aspect ratio
# is compatible. This groups portrait images together, and landscape images
# are not batched with portrait images.
_C.DATALOADER.ASPECT_RATIO_GROUPING = True
# If True, the custom Hybrid Dataloader is used.
# If not, torch.utils.data.DataLoader is used for dataloading.
_C.DATALOADER.HYBRID = True
# ---------------------------------------------------------------------------- #
# Backbone options
# ---------------------------------------------------------------------------- #
_C.MODEL.BACKBONE = CN()
# The backbone conv body to use
# The string must match a function that is imported in modeling.model_builder
# (e.g., 'FPN.add_fpn_ResNet101_conv5_body' to specify a ResNet-101-FPN
# backbone)
_C.MODEL.BACKBONE.CONV_BODY = "R-50-C4"
# Add StopGrad at a specified stage so the bottom layers are frozen
_C.MODEL.BACKBONE.FREEZE_CONV_BODY_AT = 2
_C.MODEL.BACKBONE.OUT_CHANNELS = 256 * 4
# GN for backbone
_C.MODEL.BACKBONE.USE_GN = False
# ---------------------------------------------------------------------------- #
# FPN options
# ---------------------------------------------------------------------------- #
_C.MODEL.FPN = CN()
_C.MODEL.FPN.USE_GN = False
_C.MODEL.FPN.USE_RELU = False
# ---------------------------------------------------------------------------- #
# Group Norm options
# ---------------------------------------------------------------------------- #
_C.MODEL.GROUP_NORM = CN()
# Number of dimensions per group in GroupNorm (-1 if using NUM_GROUPS)
_C.MODEL.GROUP_NORM.DIM_PER_GP = -1
# Number of groups in GroupNorm (-1 if using DIM_PER_GP)
_C.MODEL.GROUP_NORM.NUM_GROUPS = 32
# GroupNorm's small constant in the denominator
_C.MODEL.GROUP_NORM.EPSILON = 1e-5
# ---------------------------------------------------------------------------- #
# RPN options
# ---------------------------------------------------------------------------- #
_C.MODEL.RPN = CN()
_C.MODEL.RPN.USE_FPN = False
# Base RPN anchor sizes given in absolute pixels w.r.t. the scaled network input
_C.MODEL.RPN.ANCHOR_SIZES = (32, 64, 128, 256, 512)
# Stride of the feature map that RPN is attached.
# For FPN, number of strides should match number of scales
_C.MODEL.RPN.ANCHOR_STRIDE = (16,)
# RPN anchor aspect ratios
_C.MODEL.RPN.ASPECT_RATIOS = (0.5, 1.0, 2.0)
# Remove RPN anchors that go outside the image by RPN_STRADDLE_THRESH pixels
# Set to -1 or a large value, e.g. 100000, to disable pruning anchors
_C.MODEL.RPN.STRADDLE_THRESH = 0
# Minimum overlap required between an anchor and ground-truth box for the
# (anchor, gt box) pair to be a positive example (IoU >= FG_IOU_THRESHOLD
# ==> positive RPN example)
_C.MODEL.RPN.FG_IOU_THRESHOLD = 0.7
# Maximum overlap allowed between an anchor and ground-truth box for the
# (anchor, gt box) pair to be a negative examples (IoU < BG_IOU_THRESHOLD
# ==> negative RPN example)
_C.MODEL.RPN.BG_IOU_THRESHOLD = 0.3
# Total number of RPN examples per image
_C.MODEL.RPN.BATCH_SIZE_PER_IMAGE = 256
# Target fraction of foreground (positive) examples per RPN minibatch
_C.MODEL.RPN.POSITIVE_FRACTION = 0.5
# Number of top scoring RPN proposals to keep before applying NMS
# When FPN is used, this is *per FPN level* (not total)
_C.MODEL.RPN.PRE_NMS_TOP_N_TRAIN = 12000
_C.MODEL.RPN.PRE_NMS_TOP_N_TEST = 6000
# Number of top scoring RPN proposals to keep after applying NMS
_C.MODEL.RPN.POST_NMS_TOP_N_TRAIN = 2000
_C.MODEL.RPN.POST_NMS_TOP_N_TEST = 1000
# NMS threshold used on RPN proposals
_C.MODEL.RPN.NMS_THRESH = 0.7
# Proposal height and width both need to be greater than RPN_MIN_SIZE
# (a the scale used during training or inference)
_C.MODEL.RPN.MIN_SIZE = 0
# Number of top scoring RPN proposals to keep after combining proposals from
# all FPN levels
_C.MODEL.RPN.FPN_POST_NMS_TOP_N_TRAIN = 2000
_C.MODEL.RPN.FPN_POST_NMS_TOP_N_TEST = 2000
# Custom rpn head, empty to use default conv or separable conv
_C.MODEL.RPN.RPN_HEAD = "SingleConvRPNHead"
# ---------------------------------------------------------------------------- #
# ROI HEADS options
# ---------------------------------------------------------------------------- #
_C.MODEL.ROI_HEADS = CN()
_C.MODEL.ROI_HEADS.USE_FPN = False
# Overlap threshold for an RoI to be considered foreground (if >= FG_IOU_THRESHOLD)
_C.MODEL.ROI_HEADS.FG_IOU_THRESHOLD = 0.5
# Overlap threshold for an RoI to be considered background
# (class = 0 if overlap in [0, BG_IOU_THRESHOLD))
_C.MODEL.ROI_HEADS.BG_IOU_THRESHOLD = 0.5
# Default weights on (dx, dy, dw, dh) for normalizing bbox regression targets
# These are empirically chosen to approximately lead to unit variance targets
_C.MODEL.ROI_HEADS.BBOX_REG_WEIGHTS = (10., 10., 5., 5.)
# RoI minibatch size *per image* (number of regions of interest [ROIs])
# Total number of RoIs per training minibatch =
# TRAIN.BATCH_SIZE_PER_IM * TRAIN.IMS_PER_BATCH * NUM_GPUS
# E.g., a common configuration is: 512 * 2 * 8 = 8192
_C.MODEL.ROI_HEADS.BATCH_SIZE_PER_IMAGE = 512
# Target fraction of RoI minibatch that is labeled foreground (i.e. class > 0)
_C.MODEL.ROI_HEADS.POSITIVE_FRACTION = 0.25
# Only used on test mode
# Minimum score threshold (assuming scores in a [0, 1] range); a value chosen to
# balance obtaining high recall with not having too many low precision
# detections that will slow down inference post processing steps (like NMS)
_C.MODEL.ROI_HEADS.SCORE_THRESH = 0.05
# Overlap threshold used for non-maximum suppression (suppress boxes with
# IoU >= this threshold)
_C.MODEL.ROI_HEADS.NMS = 0.5
# Maximum number of detections to return per image (100 is based on the limit
# established for the COCO dataset)
_C.MODEL.ROI_HEADS.DETECTIONS_PER_IMG = 100
_C.MODEL.ROI_BOX_HEAD = CN()
_C.MODEL.ROI_BOX_HEAD.FEATURE_EXTRACTOR = "ResNet50Conv5ROIFeatureExtractor"
_C.MODEL.ROI_BOX_HEAD.PREDICTOR = "FastRCNNPredictor"
_C.MODEL.ROI_BOX_HEAD.POOLER_RESOLUTION = 14
_C.MODEL.ROI_BOX_HEAD.POOLER_SAMPLING_RATIO = 0
_C.MODEL.ROI_BOX_HEAD.POOLER_SCALES = (1.0 / 16,)
_C.MODEL.ROI_BOX_HEAD.NUM_CLASSES = 81
# Hidden layer dimension when using an MLP for the RoI box head
_C.MODEL.ROI_BOX_HEAD.MLP_HEAD_DIM = 1024
# GN
_C.MODEL.ROI_BOX_HEAD.USE_GN = False
# Dilation
_C.MODEL.ROI_BOX_HEAD.DILATION = 1
_C.MODEL.ROI_BOX_HEAD.CONV_HEAD_DIM = 256
_C.MODEL.ROI_BOX_HEAD.NUM_STACKED_CONVS = 4
_C.MODEL.ROI_MASK_HEAD = CN()
_C.MODEL.ROI_MASK_HEAD.FEATURE_EXTRACTOR = "ResNet50Conv5ROIFeatureExtractor"
_C.MODEL.ROI_MASK_HEAD.PREDICTOR = "MaskRCNNC4Predictor"
_C.MODEL.ROI_MASK_HEAD.POOLER_RESOLUTION = 14
_C.MODEL.ROI_MASK_HEAD.POOLER_SAMPLING_RATIO = 0
_C.MODEL.ROI_MASK_HEAD.POOLER_SCALES = (1.0 / 16,)
_C.MODEL.ROI_MASK_HEAD.MLP_HEAD_DIM = 1024
_C.MODEL.ROI_MASK_HEAD.CONV_LAYERS = (256, 256, 256, 256)
_C.MODEL.ROI_MASK_HEAD.RESOLUTION = 14
_C.MODEL.ROI_MASK_HEAD.SHARE_BOX_FEATURE_EXTRACTOR = True
# Whether or not resize and translate masks to the input image.
_C.MODEL.ROI_MASK_HEAD.POSTPROCESS_MASKS = False
_C.MODEL.ROI_MASK_HEAD.POSTPROCESS_MASKS_THRESHOLD = 0.5
# Dilation
_C.MODEL.ROI_MASK_HEAD.DILATION = 1
# GN
_C.MODEL.ROI_MASK_HEAD.USE_GN = False
# ---------------------------------------------------------------------------- #
# ResNe[X]t options (ResNets = {ResNet, ResNeXt}
# Note that parts of a resnet may be used for both the backbone and the head
# These options apply to both
# ---------------------------------------------------------------------------- #
_C.MODEL.RESNETS = CN()
# Number of groups to use; 1 ==> ResNet; > 1 ==> ResNeXt
_C.MODEL.RESNETS.NUM_GROUPS = 1
# Baseline width of each group
_C.MODEL.RESNETS.WIDTH_PER_GROUP = 64
# Place the stride 2 conv on the 1x1 filter
# Use True only for the original MSRA ResNet; use False for C2 and Torch models
_C.MODEL.RESNETS.STRIDE_IN_1X1 = True
# Residual transformation function
_C.MODEL.RESNETS.TRANS_FUNC = "BottleneckWithFixedBatchNorm"
# ResNet's stem function (conv1 and pool1)
_C.MODEL.RESNETS.STEM_FUNC = "StemWithFixedBatchNorm"
# Apply dilation in stage "res5"
_C.MODEL.RESNETS.RES5_DILATION = 1
_C.MODEL.RESNETS.RES2_OUT_CHANNELS = 256
_C.MODEL.RESNETS.STEM_OUT_CHANNELS = 64
# ---------------------------------------------------------------------------- #
# Solver
# ---------------------------------------------------------------------------- #
_C.SOLVER = CN()
_C.SOLVER.MAX_ITER = 40000
_C.SOLVER.BASE_LR = 0.001
_C.SOLVER.BIAS_LR_FACTOR = 2
_C.SOLVER.MOMENTUM = 0.9
_C.SOLVER.WEIGHT_DECAY = 0.0005
_C.SOLVER.WEIGHT_DECAY_BIAS = 0
_C.SOLVER.GAMMA = 0.1
_C.SOLVER.STEPS = (30000,)
_C.SOLVER.WARMUP_FACTOR = 1.0 / 3
_C.SOLVER.WARMUP_ITERS = 500
_C.SOLVER.WARMUP_METHOD = "linear"
_C.SOLVER.CHECKPOINT_PERIOD = 2500
# Number of images per batch
# This is global, so if we have 8 GPUs and IMS_PER_BATCH = 16, each GPU will
# see 2 images per batch
_C.SOLVER.IMS_PER_BATCH = 16
# Parameters to accumulate gradient across steps
_C.SOLVER.ACCUMULATE_STEPS = 1
_C.SOLVER.ACCUMULATE_GRAD = False
# ---------------------------------------------------------------------------- #
# Specific test options
# ---------------------------------------------------------------------------- #
_C.TEST = CN()
_C.TEST.EXPECTED_RESULTS = []
_C.TEST.EXPECTED_RESULTS_SIGMA_TOL = 4
# Number of images per batch
# This is global, so if we have 8 GPUs and IMS_PER_BATCH = 16, each GPU will
# see 2 images per batch
_C.TEST.IMS_PER_BATCH = 8
# ---------------------------------------------------------------------------- #
# Misc options
# ---------------------------------------------------------------------------- #
_C.OUTPUT_DIR = "."
_C.PATHS_CATALOG = os.path.join(os.path.dirname(__file__), "paths_catalog.py")
_C.USE_TORCH_DDP = True
# ---------------------------------------------------------------------------- #
# Precision options
# ---------------------------------------------------------------------------- #
# Precision of input, allowable: (float32, float16)
_C.DTYPE = "float32"
# Use NATIVE NHWC/NCHW for eligible convolutions
_C.NHWC = True
# Evaluate every epoch
_C.PER_EPOCH_EVAL = False
_C.MIN_BBOX_MAP = 0.377
_C.MIN_MASK_MAP = 0.342
_C.SAVE_CHECKPOINT = True
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/config/defaults.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from collections import defaultdict
from collections import deque
import torch
class SmoothedValue(object):
"""Track a series of values and provide access to smoothed values over a
window or the global series average.
"""
def __init__(self, window_size=20):
self.deque = deque(maxlen=window_size)
self.series = []
self.total = 0.0
self.count = 0
def update(self, value):
self.deque.append(value)
self.series.append(value)
self.count += 1
self.total += value
@property
def median(self):
d = torch.tensor(list(self.deque))
return d.median().item()
@property
def avg(self):
d = torch.tensor(list(self.deque))
return d.mean().item()
@property
def global_avg(self):
return self.total / self.count
class MetricLogger(object):
def __init__(self, delimiter="\t"):
self.meters = defaultdict(SmoothedValue)
self.delimiter = delimiter
def update(self, **kwargs):
for k, v in kwargs.items():
if isinstance(v, torch.Tensor):
v = v.item()
assert isinstance(v, (float, int))
self.meters[k].update(v)
def __getattr__(self, attr):
if attr in self.meters:
return self.meters[attr]
if attr in self.__dict__:
return self.__dict__[attr]
raise AttributeError("'{}' object has no attribute '{}'".format(
type(self).__name__, attr))
def __str__(self):
loss_str = []
for name, meter in self.meters.items():
loss_str.append(
"{}: {:.4f} ({:.4f})".format(name, meter.median, meter.global_avg)
)
return self.delimiter.join(loss_str)
def get_dict(self):
loss_dict = {}
for name, meter in self.meters.items():
loss_dict[name] = "{:.4f} ({:.4f})".format(meter.median, meter.global_avg)
return loss_dict
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/metric_logger.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import os
from maskrcnn_benchmark.utils.imports import import_file
def setup_environment():
"""Perform environment setup work. The default setup is a no-op, but this
function allows the user to specify a Python source file that performs
custom setup work that may be necessary to their computing environment.
"""
custom_module_path = os.environ.get("TORCH_DETECTRON_ENV_MODULE")
if custom_module_path:
setup_custom_environment(custom_module_path)
else:
# The default setup is a no-op
pass
def setup_custom_environment(custom_module_path):
"""Load custom environment setup from a Python source file and run the setup
function.
"""
module = import_file("maskrcnn_benchmark.utils.env.custom_module", custom_module_path)
assert hasattr(module, "setup_environment") and callable(
module.setup_environment
), (
"Custom environment module defined in {} does not have the "
"required callable attribute 'setup_environment'."
).format(
custom_module_path
)
module.setup_environment()
# Force environment setup when this module is imported
setup_environment()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/env.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import logging
import os
import torch
from maskrcnn_benchmark.utils.model_serialization import load_state_dict
from maskrcnn_benchmark.utils.c2_model_loading import load_c2_format
from maskrcnn_benchmark.utils.imports import import_file
from maskrcnn_benchmark.utils.model_zoo import cache_url
class Checkpointer(object):
def __init__(
self,
model,
optimizer=None,
scheduler=None,
save_dir="",
save_to_disk=None,
logger=None,
):
self.model = model
self.optimizer = optimizer
self.scheduler = scheduler
self.save_dir = save_dir
self.save_to_disk = save_to_disk
if logger is None:
logger = logging.getLogger(__name__)
self.logger = logger
def save(self, name, **kwargs):
if not self.save_dir:
return
if not self.save_to_disk:
return
data = {}
data["model"] = self.model.state_dict()
if self.optimizer is not None:
data["optimizer"] = self.optimizer.state_dict()
if self.scheduler is not None:
data["scheduler"] = self.scheduler.state_dict()
data.update(kwargs)
save_file = os.path.join(self.save_dir, "{}.pth".format(name))
self.logger.info("Saving checkpoint to {}".format(save_file))
torch.save(data, save_file)
self.tag_last_checkpoint(save_file)
def load(self, f=None):
if self.has_checkpoint():
# override argument with existing checkpoint
f = self.get_checkpoint_file()
if not f:
# no checkpoint could be found
self.logger.info("No checkpoint found. Initializing model from scratch")
return {}
self.logger.info("Loading checkpoint from {}".format(f))
checkpoint = self._load_file(f)
self._load_model(checkpoint)
if "optimizer" in checkpoint and self.optimizer:
self.logger.info("Loading optimizer from {}".format(f))
self.optimizer.load_state_dict(checkpoint.pop("optimizer"))
if "scheduler" in checkpoint and self.scheduler:
self.logger.info("Loading scheduler from {}".format(f))
self.scheduler.load_state_dict(checkpoint.pop("scheduler"))
# return any further checkpoint data
return checkpoint
def has_checkpoint(self):
save_file = os.path.join(self.save_dir, "last_checkpoint")
return os.path.exists(save_file)
def get_checkpoint_file(self):
save_file = os.path.join(self.save_dir, "last_checkpoint")
try:
with open(save_file, "r") as f:
last_saved = f.read()
last_saved = last_saved.strip()
except IOError:
# if file doesn't exist, maybe because it has just been
# deleted by a separate process
last_saved = ""
return last_saved
def tag_last_checkpoint(self, last_filename):
save_file = os.path.join(self.save_dir, "last_checkpoint")
with open(save_file, "w") as f:
f.write(last_filename)
def _load_file(self, f):
return torch.load(f, map_location=torch.device("cpu"))
def _load_model(self, checkpoint):
load_state_dict(self.model, checkpoint.pop("model"))
class DetectronCheckpointer(Checkpointer):
def __init__(
self,
cfg,
model,
optimizer=None,
scheduler=None,
save_dir="",
save_to_disk=None,
logger=None,
):
super(DetectronCheckpointer, self).__init__(
model, optimizer, scheduler, save_dir, save_to_disk, logger
)
self.cfg = cfg.clone()
def _load_file(self, f):
# catalog lookup
if f.startswith("catalog://"):
paths_catalog = import_file(
"maskrcnn_benchmark.config.paths_catalog", self.cfg.PATHS_CATALOG, True
)
catalog_f = paths_catalog.ModelCatalog.get(f[len("catalog://") :])
self.logger.info("{} points to {}".format(f, catalog_f))
f = catalog_f
# download url files
if f.startswith("http"):
# if the file is a url path, download it and cache it
cached_f = cache_url(f)
self.logger.info("url {} cached in {}".format(f, cached_f))
f = cached_f
# convert Caffe2 checkpoint from pkl
if f.endswith(".pkl"):
return load_c2_format(self.cfg, f)
# load native detectron.pytorch checkpoint
loaded = super(DetectronCheckpointer, self)._load_file(f)
if "model" not in loaded:
loaded = dict(model=loaded)
return loaded
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/checkpoint.py |
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
"""
This file contains primitives for multi-gpu communication.
This is useful when doing distributed training.
"""
import pickle
import time
import torch
import torch.distributed as dist
def get_world_size():
if not dist.is_available():
return 1
if not dist.is_initialized():
return 1
return dist.get_world_size()
def get_rank():
if not dist.is_available():
return 0
if not dist.is_initialized():
return 0
return dist.get_rank()
def is_main_process():
return get_rank() == 0
def synchronize():
"""
Helper function to synchronize (barrier) among all processes when
using distributed training
"""
if not dist.is_available():
return
if not dist.is_initialized():
return
world_size = dist.get_world_size()
if world_size == 1:
return
dist.barrier()
def all_gather(data):
"""
Run all_gather on arbitrary picklable data (not necessarily tensors)
Args:
data: any picklable object
Returns:
list[data]: list of data gathered from each rank
"""
world_size = get_world_size()
if world_size == 1:
return [data]
# serialized to a Tensor
buffer = pickle.dumps(data)
storage = torch.ByteStorage.from_buffer(buffer)
tensor = torch.ByteTensor(storage).to("cuda")
# obtain Tensor size of each rank
local_size = torch.IntTensor([tensor.numel()]).to("cuda")
size_list = [torch.IntTensor([0]).to("cuda") for _ in range(world_size)]
dist.all_gather(size_list, local_size)
size_list = [int(size.item()) for size in size_list]
max_size = max(size_list)
# receiving Tensor from all ranks
# we pad the tensor because torch all_gather does not support
# gathering tensors of different shapes
tensor_list = []
for _ in size_list:
tensor_list.append(torch.ByteTensor(size=(max_size,)).to("cuda"))
if local_size != max_size:
padding = torch.ByteTensor(size=(max_size - local_size,)).to("cuda")
tensor = torch.cat((tensor, padding), dim=0)
dist.all_gather(tensor_list, tensor)
data_list = []
for size, tensor in zip(size_list, tensor_list):
buffer = tensor.cpu().numpy().tobytes()[:size]
data_list.append(pickle.loads(buffer))
return data_list
def reduce_dict(input_dict, average=True):
"""
Args:
input_dict (dict): all the values will be reduced
average (bool): whether to do average or sum
Reduce the values in the dictionary from all processes so that process with rank
0 has the averaged results. Returns a dict with the same fields as
input_dict, after reduction.
"""
world_size = get_world_size()
if world_size < 2:
return input_dict
with torch.no_grad():
names = []
values = []
# sort the keys so that they are consistent across processes
for k in sorted(input_dict.keys()):
names.append(k)
values.append(input_dict[k])
values = torch.stack(values, dim=0)
dist.reduce(values, dst=0)
if dist.get_rank() == 0 and average:
# only main process gets accumulated, so only divide by
# world_size in this case
values /= world_size
reduced_dict = {k: v for k, v in zip(names, values)}
return reduced_dict
def synchronized_timestamp():
torch.cuda.synchronize()
return time.time()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/comm.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import logging
import pickle
from collections import OrderedDict
import torch
from maskrcnn_benchmark.utils.model_serialization import load_state_dict
from maskrcnn_benchmark.utils.registry import Registry
def _rename_basic_resnet_weights(layer_keys):
layer_keys = [k.replace("_", ".") for k in layer_keys]
layer_keys = [k.replace(".w", ".weight") for k in layer_keys]
layer_keys = [k.replace(".bn", "_bn") for k in layer_keys]
layer_keys = [k.replace(".b", ".bias") for k in layer_keys]
layer_keys = [k.replace("_bn.s", "_bn.scale") for k in layer_keys]
layer_keys = [k.replace(".biasranch", ".branch") for k in layer_keys]
layer_keys = [k.replace("bbox.pred", "bbox_pred") for k in layer_keys]
layer_keys = [k.replace("cls.score", "cls_score") for k in layer_keys]
layer_keys = [k.replace("res.conv1_", "conv1_") for k in layer_keys]
# RPN / Faster RCNN
layer_keys = [k.replace(".biasbox", ".bbox") for k in layer_keys]
layer_keys = [k.replace("conv.rpn", "rpn.conv") for k in layer_keys]
layer_keys = [k.replace("rpn.bbox.pred", "rpn.bbox_pred") for k in layer_keys]
layer_keys = [k.replace("rpn.cls.logits", "rpn.cls_logits") for k in layer_keys]
# Affine-Channel -> BatchNorm enaming
layer_keys = [k.replace("_bn.scale", "_bn.weight") for k in layer_keys]
# Make torchvision-compatible
layer_keys = [k.replace("conv1_bn.", "bn1.") for k in layer_keys]
layer_keys = [k.replace("res2.", "layer1.") for k in layer_keys]
layer_keys = [k.replace("res3.", "layer2.") for k in layer_keys]
layer_keys = [k.replace("res4.", "layer3.") for k in layer_keys]
layer_keys = [k.replace("res5.", "layer4.") for k in layer_keys]
layer_keys = [k.replace(".branch2a.", ".conv1.") for k in layer_keys]
layer_keys = [k.replace(".branch2a_bn.", ".bn1.") for k in layer_keys]
layer_keys = [k.replace(".branch2b.", ".conv2.") for k in layer_keys]
layer_keys = [k.replace(".branch2b_bn.", ".bn2.") for k in layer_keys]
layer_keys = [k.replace(".branch2c.", ".conv3.") for k in layer_keys]
layer_keys = [k.replace(".branch2c_bn.", ".bn3.") for k in layer_keys]
layer_keys = [k.replace(".branch1.", ".downsample.0.") for k in layer_keys]
layer_keys = [k.replace(".branch1_bn.", ".downsample.1.") for k in layer_keys]
# GroupNorm
layer_keys = [k.replace("conv1.gn.s", "bn1.weight") for k in layer_keys]
layer_keys = [k.replace("conv1.gn.bias", "bn1.bias") for k in layer_keys]
layer_keys = [k.replace("conv2.gn.s", "bn2.weight") for k in layer_keys]
layer_keys = [k.replace("conv2.gn.bias", "bn2.bias") for k in layer_keys]
layer_keys = [k.replace("conv3.gn.s", "bn3.weight") for k in layer_keys]
layer_keys = [k.replace("conv3.gn.bias", "bn3.bias") for k in layer_keys]
layer_keys = [k.replace("downsample.0.gn.s", "downsample.1.weight") \
for k in layer_keys]
layer_keys = [k.replace("downsample.0.gn.bias", "downsample.1.bias") \
for k in layer_keys]
return layer_keys
def _rename_fpn_weights(layer_keys, stage_names):
for mapped_idx, stage_name in enumerate(stage_names, 1):
suffix = ""
if mapped_idx < 4:
suffix = ".lateral"
layer_keys = [
k.replace("fpn.inner.layer{}.sum{}".format(stage_name, suffix), "fpn_inner{}".format(mapped_idx)) for k in layer_keys
]
layer_keys = [k.replace("fpn.layer{}.sum".format(stage_name), "fpn_layer{}".format(mapped_idx)) for k in layer_keys]
layer_keys = [k.replace("rpn.conv.fpn2", "rpn.conv") for k in layer_keys]
layer_keys = [k.replace("rpn.bbox_pred.fpn2", "rpn.bbox_pred") for k in layer_keys]
layer_keys = [
k.replace("rpn.cls_logits.fpn2", "rpn.cls_logits") for k in layer_keys
]
return layer_keys
def _rename_weights_for_resnet(weights, stage_names):
original_keys = sorted(weights.keys())
layer_keys = sorted(weights.keys())
# for X-101, rename output to fc1000 to avoid conflicts afterwards
layer_keys = [k if k != "pred_b" else "fc1000_b" for k in layer_keys]
layer_keys = [k if k != "pred_w" else "fc1000_w" for k in layer_keys]
# performs basic renaming: _ -> . , etc
layer_keys = _rename_basic_resnet_weights(layer_keys)
# FPN
layer_keys = _rename_fpn_weights(layer_keys, stage_names)
# Mask R-CNN
layer_keys = [k.replace("mask.fcn.logits", "mask_fcn_logits") for k in layer_keys]
layer_keys = [k.replace(".[mask].fcn", "mask_fcn") for k in layer_keys]
layer_keys = [k.replace("conv5.mask", "conv5_mask") for k in layer_keys]
# Keypoint R-CNN
layer_keys = [k.replace("kps.score.lowres", "kps_score_lowres") for k in layer_keys]
layer_keys = [k.replace("kps.score", "kps_score") for k in layer_keys]
layer_keys = [k.replace("conv.fcn", "conv_fcn") for k in layer_keys]
# Rename for our RPN structure
layer_keys = [k.replace("rpn.", "rpn.head.") for k in layer_keys]
key_map = {k: v for k, v in zip(original_keys, layer_keys)}
logger = logging.getLogger(__name__)
logger.info("Remapping C2 weights")
max_c2_key_size = max([len(k) for k in original_keys if "_momentum" not in k])
new_weights = OrderedDict()
for k in original_keys:
v = weights[k]
if "_momentum" in k:
continue
# if 'fc1000' in k:
# continue
w = torch.from_numpy(v)
# if "bn" in k:
# w = w.view(1, -1, 1, 1)
logger.info("C2 name: {: <{}} mapped name: {}".format(k, max_c2_key_size, key_map[k]))
new_weights[key_map[k]] = w
return new_weights
def _load_c2_pickled_weights(file_path):
with open(file_path, "rb") as f:
data = pickle.load(f, encoding="latin1")
if "blobs" in data:
weights = data["blobs"]
else:
weights = data
return weights
_C2_STAGE_NAMES = {
"R-50": ["1.2", "2.3", "3.5", "4.2"],
"R-101": ["1.2", "2.3", "3.22", "4.2"],
}
C2_FORMAT_LOADER = Registry()
@C2_FORMAT_LOADER.register("R-50-C4")
@C2_FORMAT_LOADER.register("R-50-C5")
@C2_FORMAT_LOADER.register("R-101-C4")
@C2_FORMAT_LOADER.register("R-101-C5")
@C2_FORMAT_LOADER.register("R-50-FPN")
@C2_FORMAT_LOADER.register("R-101-FPN")
def load_resnet_c2_format(cfg, f):
state_dict = _load_c2_pickled_weights(f)
conv_body = cfg.MODEL.BACKBONE.CONV_BODY
arch = conv_body.replace("-C4", "").replace("-C5", "").replace("-FPN", "")
stages = _C2_STAGE_NAMES[arch]
state_dict = _rename_weights_for_resnet(state_dict, stages)
return dict(model=state_dict)
def load_c2_format(cfg, f):
return C2_FORMAT_LOADER[cfg.MODEL.BACKBONE.CONV_BODY](cfg, f)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/c2_model_loading.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
def _register_generic(module_dict, module_name, module):
assert module_name not in module_dict
module_dict[module_name] = module
class Registry(dict):
'''
A helper class for managing registering modules, it extends a dictionary
and provides a register functions.
Eg. creeting a registry:
some_registry = Registry({"default": default_module})
There're two ways of registering new modules:
1): normal way is just calling register function:
def foo():
...
some_registry.register("foo_module", foo)
2): used as decorator when declaring the module:
@some_registry.register("foo_module")
@some_registry.register("foo_modeul_nickname")
def foo():
...
Access of module is just like using a dictionary, eg:
f = some_registry["foo_modeul"]
'''
def __init__(self, *args, **kwargs):
super(Registry, self).__init__(*args, **kwargs)
def register(self, module_name, module=None):
# used as function call
if module is not None:
_register_generic(self, module_name, module)
return
# used as decorator
def register_fn(fn):
_register_generic(self, module_name, fn)
return fn
return register_fn
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/registry.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import os
import sys
try:
from torch.utils.model_zoo import _download_url_to_file
from torch.utils.model_zoo import urlparse
from torch.utils.model_zoo import HASH_REGEX
except:
from torch.hub import _download_url_to_file
from torch.hub import urlparse
from torch.hub import HASH_REGEX
from maskrcnn_benchmark.utils.comm import is_main_process
from maskrcnn_benchmark.utils.comm import synchronize
# very similar to https://github.com/pytorch/pytorch/blob/master/torch/utils/model_zoo.py
# but with a few improvements and modifications
def cache_url(url, model_dir=None, progress=True):
r"""Loads the Torch serialized object at the given URL.
If the object is already present in `model_dir`, it's deserialized and
returned. The filename part of the URL should follow the naming convention
``filename-<sha256>.ext`` where ``<sha256>`` is the first eight or more
digits of the SHA256 hash of the contents of the file. The hash is used to
ensure unique names and to verify the contents of the file.
The default value of `model_dir` is ``$TORCH_HOME/models`` where
``$TORCH_HOME`` defaults to ``~/.torch``. The default directory can be
overridden with the ``$TORCH_MODEL_ZOO`` environment variable.
Args:
url (string): URL of the object to download
model_dir (string, optional): directory in which to save the object
progress (bool, optional): whether or not to display a progress bar to stderr
Example:
>>> cached_file = maskrcnn_benchmark.utils.model_zoo.cache_url('https://s3.amazonaws.com/pytorch/models/resnet18-5c106cde.pth')
"""
if model_dir is None:
torch_home = os.path.expanduser(os.getenv('TORCH_HOME', '~/.torch'))
model_dir = os.getenv('TORCH_MODEL_ZOO', os.path.join(torch_home, 'models'))
if not os.path.exists(model_dir) and is_main_process():
os.makedirs(model_dir)
parts = urlparse(url)
filename = os.path.basename(parts.path)
if filename == "model_final.pkl":
# workaround as pre-trained Caffe2 models from Detectron have all the same filename
# so make the full path the filename by replacing / with _
filename = parts.path.replace("/", "_")
cached_file = os.path.join(model_dir, filename)
if not os.path.exists(cached_file) and is_main_process():
sys.stderr.write('Downloading: "{}" to {}\n'.format(url, cached_file))
hash_prefix = HASH_REGEX.search(filename)
if hash_prefix is not None:
hash_prefix = hash_prefix.group(1)
# workaround: Caffe2 models don't have a hash, but follow the R-50 convention,
# which matches the hash PyTorch uses. So we skip the hash matching
# if the hash_prefix is less than 6 characters
if len(hash_prefix) < 6:
hash_prefix = None
_download_url_to_file(url, cached_file, hash_prefix, progress=progress)
synchronize()
return cached_file
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/model_zoo.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import PIL
from torch.utils.collect_env import get_pretty_env_info
def get_pil_version():
return "\n Pillow ({})".format(PIL.__version__)
def collect_env_info():
env_str = get_pretty_env_info()
env_str += get_pil_version()
return env_str
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/collect_env.py |
DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/__init__.py |
|
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import logging
import os
import sys
def setup_logger(name, save_dir, distributed_rank):
logger = logging.getLogger(name)
logger.setLevel(logging.DEBUG)
# don't log results for the non-master process
if distributed_rank > 0:
return logger
ch = logging.StreamHandler(stream=sys.stdout)
ch.setLevel(logging.DEBUG)
formatter = logging.Formatter("%(asctime)s %(name)s %(levelname)s: %(message)s")
ch.setFormatter(formatter)
logger.addHandler(ch)
if save_dir:
fh = logging.FileHandler(os.path.join(save_dir, "log.txt"))
fh.setLevel(logging.DEBUG)
fh.setFormatter(formatter)
logger.addHandler(fh)
return logger
def format_step(step):
if isinstance(step, str):
return step
s = ""
if len(step) > 0:
s += "Training Iteration: {} ".format(step[0])
if len(step) > 1:
s += "Training Epoch: {} ".format(step[1])
if len(step) > 2:
s += "Validation Iteration: {} ".format(step[2])
return s
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/logger.py |
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
"""
Module for cv2 utility functions and maintaining version compatibility
between 3.x and 4.x
"""
import cv2
def findContours(*args, **kwargs):
"""
Wraps cv2.findContours to maintain compatiblity between versions
3 and 4
Returns:
contours, hierarchy
"""
if cv2.__version__.startswith('4'):
contours, hierarchy = cv2.findContours(*args, **kwargs)
elif cv2.__version__.startswith('3'):
_, contours, hierarchy = cv2.findContours(*args, **kwargs)
else:
raise AssertionError(
'cv2 must be either version 3 or 4 to call this method')
return contours, hierarchy
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/cv2_util.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
import importlib
import importlib.util
import sys
# from https://stackoverflow.com/questions/67631/how-to-import-a-module-given-the-full-path?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa
def import_file(module_name, file_path, make_importable=False):
spec = importlib.util.spec_from_file_location(module_name, file_path)
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
if make_importable:
sys.modules[module_name] = module
return module
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/imports.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from collections import OrderedDict
import logging
import torch
def align_and_update_state_dicts(model_state_dict, loaded_state_dict):
"""
Strategy: suppose that the models that we will create will have prefixes appended
to each of its keys, for example due to an extra level of nesting that the original
pre-trained weights from ImageNet won't contain. For example, model.state_dict()
might return backbone[0].body.res2.conv1.weight, while the pre-trained model contains
res2.conv1.weight. We thus want to match both parameters together.
For that, we look for each model weight, look among all loaded keys if there is one
that is a suffix of the current weight name, and use it if that's the case.
If multiple matches exist, take the one with longest size
of the corresponding name. For example, for the same model as before, the pretrained
weight file can contain both res2.conv1.weight, as well as conv1.weight. In this case,
we want to match backbone[0].body.conv1.weight to conv1.weight, and
backbone[0].body.res2.conv1.weight to res2.conv1.weight.
"""
current_keys = sorted(list(model_state_dict.keys()))
loaded_keys = sorted(list(loaded_state_dict.keys()))
# get a matrix of string matches, where each (i, j) entry correspond to the size of the
# loaded_key string, if it matches
match_matrix = [
len(j) if i.endswith(j) else 0 for i in current_keys for j in loaded_keys
]
match_matrix = torch.as_tensor(match_matrix).view(
len(current_keys), len(loaded_keys)
)
max_match_size, idxs = match_matrix.max(1)
# remove indices that correspond to no-match
idxs[max_match_size == 0] = -1
# used for logging
max_size = max([len(key) for key in current_keys]) if current_keys else 1
max_size_loaded = max([len(key) for key in loaded_keys]) if loaded_keys else 1
log_str_template = "{: <{}} loaded from {: <{}} of shape {}"
logger = logging.getLogger(__name__)
for idx_new, idx_old in enumerate(idxs.tolist()):
if idx_old == -1:
continue
key = current_keys[idx_new]
key_old = loaded_keys[idx_old]
model_state_dict[key] = loaded_state_dict[key_old]
logger.info(
log_str_template.format(
key,
max_size,
key_old,
max_size_loaded,
tuple(loaded_state_dict[key_old].shape),
)
)
def strip_prefix_if_present(state_dict, prefix):
keys = sorted(state_dict.keys())
if not all(key.startswith(prefix) for key in keys):
return state_dict
stripped_state_dict = OrderedDict()
for key, value in state_dict.items():
stripped_state_dict[key.replace(prefix, "")] = value
return stripped_state_dict
def load_state_dict(model, loaded_state_dict):
model_state_dict = model.state_dict()
# if the state_dict comes from a model that was wrapped in a
# DataParallel or DistributedDataParallel during serialization,
# remove the "module" prefix before performing the matching
loaded_state_dict = strip_prefix_if_present(loaded_state_dict, prefix="module.")
align_and_update_state_dicts(model_state_dict, loaded_state_dict)
# use strict loading
model.load_state_dict(model_state_dict) | DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/model_serialization.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import errno
import os
def mkdir(path):
try:
os.makedirs(path)
except OSError as e:
if e.errno != errno.EEXIST:
raise
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/utils/miscellaneous.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
from apex.optimizers import FusedSGD
from .lr_scheduler import WarmupMultiStepLR
def make_optimizer(cfg, model):
params = []
for key, value in model.named_parameters():
if not value.requires_grad:
continue
lr = cfg.SOLVER.BASE_LR
weight_decay = cfg.SOLVER.WEIGHT_DECAY
if "bias" in key:
lr = cfg.SOLVER.BASE_LR * cfg.SOLVER.BIAS_LR_FACTOR
weight_decay = cfg.SOLVER.WEIGHT_DECAY_BIAS
params += [{"params": [value], "lr": lr, "weight_decay": weight_decay}]
optimizer = FusedSGD(params, lr, momentum=cfg.SOLVER.MOMENTUM)
return optimizer
def make_lr_scheduler(cfg, optimizer):
return WarmupMultiStepLR(
optimizer,
cfg.SOLVER.STEPS,
cfg.SOLVER.GAMMA,
warmup_factor=cfg.SOLVER.WARMUP_FACTOR,
warmup_iters=cfg.SOLVER.WARMUP_ITERS,
warmup_method=cfg.SOLVER.WARMUP_METHOD,
)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/solver/build.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
from bisect import bisect_right
import torch
# FIXME ideally this would be achieved with a CombinedLRScheduler,
# separating MultiStepLR with WarmupLR
# but the current LRScheduler design doesn't allow it
class WarmupMultiStepLR(torch.optim.lr_scheduler._LRScheduler):
def __init__(
self,
optimizer,
milestones,
gamma=0.1,
warmup_factor=1.0 / 3,
warmup_iters=500,
warmup_method="linear",
last_epoch=-1,
):
if not list(milestones) == sorted(milestones):
raise ValueError(
"Milestones should be a list of" " increasing integers. Got {}",
milestones,
)
#adding mlperf consistent warmpup routine
if warmup_method not in ("constant", "linear", "mlperf_linear"):
raise ValueError(
"Only 'constant' or 'linear' warmup_method accepted"
"got {}".format(warmup_method)
)
self.milestones = milestones
self.gamma = gamma
self.warmup_factor = warmup_factor
self.warmup_iters = warmup_iters
self.warmup_method = warmup_method
super(WarmupMultiStepLR, self).__init__(optimizer, last_epoch)
def get_lr(self):
warmup_factor = 1
if self.last_epoch < self.warmup_iters:
if self.warmup_method == "constant":
warmup_factor = self.warmup_factor
elif self.warmup_method == "linear":
alpha = self.last_epoch / self.warmup_iters
warmup_factor = self.warmup_factor * (1 - alpha) + alpha
#define mlperf warmup routine
elif self.warmup_method == "mlperf_linear":
# alpha = self.last_epoch / self.warmup_iters
# warmup_factor = self.warmup_factor * (1 - alpha) + alpha
delta = (self.warmup_iters - self.last_epoch) * self.warmup_factor
return [
(base_lr - delta)
* self.gamma ** bisect_right(self.milestones, self.last_epoch)
for base_lr in self.base_lrs
]
return [
base_lr
* warmup_factor
* self.gamma ** bisect_right(self.milestones, self.last_epoch)
for base_lr in self.base_lrs
]
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/solver/lr_scheduler.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from .build import make_optimizer
from .build import make_lr_scheduler
from .lr_scheduler import WarmupMultiStepLR
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/solver/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
import torch.nn.functional as F
from torch import nn
from maskrcnn_benchmark.layers import ROIAlign
from .utils import cat
class LevelMapper(object):
"""Determine which FPN level each RoI in a set of RoIs should map to based
on the heuristic in the FPN paper.
"""
def __init__(self, k_min, k_max, canonical_scale=224, canonical_level=4, eps=1e-6):
"""
Arguments:
k_min (int)
k_max (int)
canonical_scale (int)
canonical_level (int)
eps (float)
"""
self.k_min = k_min
self.k_max = k_max
self.s0 = canonical_scale
self.lvl0 = canonical_level
self.eps = eps
def __call__(self, boxlists):
"""
Arguments:
boxlists (list[BoxList])
"""
# Compute level ids
s = torch.sqrt(cat([boxlist.area() for boxlist in boxlists]))
# Eqn.(1) in FPN paper
target_lvls = torch.floor(self.lvl0 + torch.log2(s / self.s0 + self.eps))
target_lvls = torch.clamp(target_lvls, min=self.k_min, max=self.k_max)
return target_lvls.to(torch.int64) - self.k_min
class Pooler(nn.Module):
"""
Pooler for Detection with or without FPN.
It currently hard-code ROIAlign in the implementation,
but that can be made more generic later on.
Also, the requirement of passing the scales is not strictly necessary, as they
can be inferred from the size of the feature map / size of original image,
which is available thanks to the BoxList.
"""
def __init__(self, output_size, scales, sampling_ratio, is_nhwc):
"""
Arguments:
output_size (list[tuple[int]] or list[int]): output size for the pooled region
scales (list[float]): scales for each Pooler
sampling_ratio (int): sampling ratio for ROIAlign
"""
super(Pooler, self).__init__()
poolers = []
self.is_nhwc=is_nhwc
for scale in scales:
poolers.append(
ROIAlign(
output_size, spatial_scale=scale, sampling_ratio=sampling_ratio, is_nhwc=is_nhwc
)
)
self.poolers = nn.ModuleList(poolers)
self.output_size = output_size
# get the levels in the feature map by leveraging the fact that the network always
# downsamples by a factor of 2 at each level.
lvl_min = -torch.log2(torch.tensor(scales[0], dtype=torch.float32)).item()
lvl_max = -torch.log2(torch.tensor(scales[-1], dtype=torch.float32)).item()
self.map_levels = LevelMapper(lvl_min, lvl_max)
def convert_to_roi_format(self, boxes):
concat_boxes = cat([b.bbox for b in boxes], dim=0)
device, dtype = concat_boxes.device, concat_boxes.dtype
ids = cat(
[
torch.full((len(b), 1), i, dtype=dtype, device=device)
for i, b in enumerate(boxes)
],
dim=0,
)
rois = torch.cat([ids, concat_boxes], dim=1)
return rois
def forward(self, x, boxes):
"""
Arguments:
x (list[Tensor]): feature maps for each level
boxes (list[BoxList]): boxes to be used to perform the pooling operation.
Returns:
result (Tensor)
"""
num_levels = len(self.poolers)
rois = self.convert_to_roi_format(boxes)
if num_levels == 1:
return self.poolers[0](x[0], rois)
levels = self.map_levels(boxes)
num_rois = len(rois)
num_channels = x[0].shape[1]
output_size = self.output_size[0]
dtype, device = x[0].dtype, x[0].device
result = torch.zeros(
(num_rois, num_channels, output_size, output_size),
dtype=dtype,
device=device,
) if not self.is_nhwc else torch.zeros(
(num_rois, num_channels, output_size, output_size),
dtype=dtype,
device=device,
).to(memory_format=torch.channels_last)
for level, (per_level_feature, pooler) in enumerate(zip(x, self.poolers)):
idx_in_level = torch.nonzero(levels == level).squeeze(1)
rois_per_level = rois[idx_in_level]
result[idx_in_level] = pooler(per_level_feature, rois_per_level).to(dtype)
return result
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/poolers.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
import torch
from maskrcnn_benchmark import _C
class Matcher(object):
"""
This class assigns to each predicted "element" (e.g., a box) a ground-truth
element. Each predicted element will have exactly zero or one matches; each
ground-truth element may be assigned to zero or more predicted elements.
Matching is based on the MxN match_quality_matrix, that characterizes how well
each (ground-truth, predicted)-pair match. For example, if the elements are
boxes, the matrix may contain box IoU overlap values.
The matcher returns a tensor of size N containing the index of the ground-truth
element m that matches to prediction n. If there is no match, a negative value
is returned.
"""
BELOW_LOW_THRESHOLD = -1
BETWEEN_THRESHOLDS = -2
def __init__(self, high_threshold, low_threshold, allow_low_quality_matches=False):
"""
Args:
high_threshold (float): quality values greater than or equal to
this value are candidate matches.
low_threshold (float): a lower quality threshold used to stratify
matches into three levels:
1) matches >= high_threshold
2) BETWEEN_THRESHOLDS matches in [low_threshold, high_threshold)
3) BELOW_LOW_THRESHOLD matches in [0, low_threshold)
allow_low_quality_matches (bool): if True, produce additional matches
for predictions that have only low-quality match candidates. See
set_low_quality_matches_ for more details.
"""
assert low_threshold <= high_threshold
self.high_threshold = high_threshold
self.low_threshold = low_threshold
self.allow_low_quality_matches = allow_low_quality_matches
def __call__(self, match_quality_matrix):
"""
Args:
match_quality_matrix (Tensor[float]): an MxN tensor, containing the
pairwise quality between M ground-truth elements and N predicted elements.
Returns:
matches (Tensor[int64]): an N tensor where N[i] is a matched gt in
[0, M - 1] or a negative value indicating that prediction i could not
be matched.
"""
if match_quality_matrix.numel() == 0:
# empty targets or proposals not supported during training
if match_quality_matrix.shape[0] == 0:
raise ValueError(
"No ground-truth boxes available for one of the images "
"during training")
else:
raise ValueError(
"No proposal boxes available for one of the images "
"during training")
# match_quality_matrix is M (gt) x N (predicted)
# Max over gt elements (dim 0) to find best gt candidate for each prediction
if match_quality_matrix.is_cuda:
matches = _C.match_proposals(match_quality_matrix,self.allow_low_quality_matches, self.low_threshold, self.high_threshold)
else:
matched_vals, matches = match_quality_matrix.max(dim=0)
if self.allow_low_quality_matches:
all_matches = matches.clone()
# Assign candidate matches with low quality to negative (unassigned) values
below_low_threshold = matched_vals < self.low_threshold
between_thresholds = (matched_vals >= self.low_threshold) & (
matched_vals < self.high_threshold
)
matches[below_low_threshold] = Matcher.BELOW_LOW_THRESHOLD
matches[between_thresholds] = Matcher.BETWEEN_THRESHOLDS
if self.allow_low_quality_matches:
self.set_low_quality_matches_(matches, all_matches, match_quality_matrix)
return matches
def set_low_quality_matches_(self, matches, all_matches, match_quality_matrix):
"""
Produce additional matches for predictions that have only low-quality matches.
Specifically, for each ground-truth find the set of predictions that have
maximum overlap with it (including ties); for each prediction in that set, if
it is unmatched, then match it to the ground-truth with which it has the highest
quality value.
"""
# For each gt, find the prediction with which it has highest quality
highest_quality_foreach_gt, _ = match_quality_matrix.max(dim=1)
# Find highest quality match available, even if it is low, including ties
gt_pred_pairs_of_highest_quality = torch.nonzero(
match_quality_matrix == highest_quality_foreach_gt[:, None]
)
# Example gt_pred_pairs_of_highest_quality:
# tensor([[ 0, 39796],
# [ 1, 32055],
# [ 1, 32070],
# [ 2, 39190],
# [ 2, 40255],
# [ 3, 40390],
# [ 3, 41455],
# [ 4, 45470],
# [ 5, 45325],
# [ 5, 46390]])
# Each row is a (gt index, prediction index)
# Note how gt items 1, 2, 3, and 5 each have two ties
pred_inds_to_update = gt_pred_pairs_of_highest_quality[:, 1]
matches[pred_inds_to_update] = all_matches[pred_inds_to_update]
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/matcher.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from maskrcnn_benchmark.utils.registry import Registry
BACKBONES = Registry()
ROI_BOX_FEATURE_EXTRACTORS = Registry()
RPN_HEADS = Registry()
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/registry.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
import math
from maskrcnn_benchmark import _C
import torch
class BoxCoder(object):
"""
This class encodes and decodes a set of bounding boxes into
the representation used for training the regressors.
"""
def __init__(self, weights, bbox_xform_clip=math.log(1000. / 16)):
"""
Arguments:
weights (4-element tuple)
bbox_xform_clip (float)
"""
self.weights = weights
self.bbox_xform_clip = bbox_xform_clip
def encode(self, reference_boxes, proposals):
"""
Encode a set of proposals with respect to some
reference boxes
Arguments:
reference_boxes (Tensor): reference boxes
proposals (Tensor): boxes to be encoded
"""
wx, wy, ww, wh = self.weights
if reference_boxes.is_cuda and proposals.is_cuda:
targets = torch.stack(_C.box_encode(reference_boxes, proposals, wx, wy, ww, wh), dim=1)
else:
TO_REMOVE = 1 # TODO remove
ex_widths = proposals[:, 2] - proposals[:, 0] + TO_REMOVE
ex_heights = proposals[:, 3] - proposals[:, 1] + TO_REMOVE
ex_ctr_x = proposals[:, 0] + 0.5 * ex_widths
ex_ctr_y = proposals[:, 1] + 0.5 * ex_heights
gt_widths = reference_boxes[:, 2] - reference_boxes[:, 0] + TO_REMOVE
gt_heights = reference_boxes[:, 3] - reference_boxes[:, 1] + TO_REMOVE
gt_ctr_x = reference_boxes[:, 0] + 0.5 * gt_widths
gt_ctr_y = reference_boxes[:, 1] + 0.5 * gt_heights
wx, wy, ww, wh = self.weights
targets_dx = wx * (gt_ctr_x - ex_ctr_x) / ex_widths
targets_dy = wy * (gt_ctr_y - ex_ctr_y) / ex_heights
targets_dw = ww * torch.log(gt_widths / ex_widths)
targets_dh = wh * torch.log(gt_heights / ex_heights)
targets = torch.stack((targets_dx, targets_dy, targets_dw, targets_dh), dim=1)
return targets
def decode(self, rel_codes, boxes):
"""
From a set of original boxes and encoded relative box offsets,
get the decoded boxes.
Arguments:
rel_codes (Tensor): encoded boxes
boxes (Tensor): reference boxes.
"""
boxes = boxes.to(rel_codes.dtype)
TO_REMOVE = 1 # TODO remove
widths = boxes[:, 2] - boxes[:, 0] + TO_REMOVE
heights = boxes[:, 3] - boxes[:, 1] + TO_REMOVE
ctr_x = boxes[:, 0] + 0.5 * widths
ctr_y = boxes[:, 1] + 0.5 * heights
wx, wy, ww, wh = self.weights
dx = rel_codes[:, 0::4] / wx
dy = rel_codes[:, 1::4] / wy
dw = rel_codes[:, 2::4] / ww
dh = rel_codes[:, 3::4] / wh
# Prevent sending too large values into torch.exp()
dw = torch.clamp(dw, max=self.bbox_xform_clip)
dh = torch.clamp(dh, max=self.bbox_xform_clip)
pred_ctr_x = dx * widths[:, None] + ctr_x[:, None]
pred_ctr_y = dy * heights[:, None] + ctr_y[:, None]
pred_w = torch.exp(dw) * widths[:, None]
pred_h = torch.exp(dh) * heights[:, None]
pred_boxes = torch.zeros_like(rel_codes)
# x1
pred_boxes[:, 0::4] = pred_ctr_x - 0.5 * pred_w
# y1
pred_boxes[:, 1::4] = pred_ctr_y - 0.5 * pred_h
# x2 (note: "- 1" is correct; don't be fooled by the asymmetry)
pred_boxes[:, 2::4] = pred_ctr_x + 0.5 * pred_w - 1
# y2 (note: "- 1" is correct; don't be fooled by the asymmetry)
pred_boxes[:, 3::4] = pred_ctr_y + 0.5 * pred_h - 1
return pred_boxes
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/box_coder.py |
DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/__init__.py |
|
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
"""
Miscellaneous utility functions
"""
import torch
def cat(tensors, dim=0):
"""
Efficient version of torch.cat that avoids a copy if there is only a single element in a list
"""
assert isinstance(tensors, (list, tuple))
if len(tensors) == 1:
return tensors[0]
return torch.cat(tensors, dim)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/utils.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
"""
Miscellaneous utility functions
"""
import torch
from torch import nn
from torch.nn import functional as F
from maskrcnn_benchmark.config import cfg
from maskrcnn_benchmark.layers import Conv2d
from maskrcnn_benchmark.modeling.poolers import Pooler
def get_group_gn(dim, dim_per_gp, num_groups):
"""get number of groups used by GroupNorm, based on number of channels."""
assert dim_per_gp == -1 or num_groups == -1, \
"GroupNorm: can only specify G or C/G."
if dim_per_gp > 0:
assert dim % dim_per_gp == 0, \
"dim: {}, dim_per_gp: {}".format(dim, dim_per_gp)
group_gn = dim // dim_per_gp
else:
assert dim % num_groups == 0, \
"dim: {}, num_groups: {}".format(dim, num_groups)
group_gn = num_groups
return group_gn
def group_norm(out_channels, affine=True, divisor=1):
out_channels = out_channels // divisor
dim_per_gp = cfg.MODEL.GROUP_NORM.DIM_PER_GP // divisor
num_groups = cfg.MODEL.GROUP_NORM.NUM_GROUPS // divisor
eps = cfg.MODEL.GROUP_NORM.EPSILON # default: 1e-5
return torch.nn.GroupNorm(
get_group_gn(out_channels, dim_per_gp, num_groups),
out_channels,
eps,
affine
)
def make_conv3x3(
in_channels,
out_channels,
dilation=1,
stride=1,
use_gn=False,
use_relu=False,
kaiming_init=True
):
conv = Conv2d(
in_channels,
out_channels,
kernel_size=3,
stride=stride,
padding=dilation,
dilation=dilation,
bias=False if use_gn else True
)
if kaiming_init:
nn.init.kaiming_normal_(
conv.weight, mode="fan_out", nonlinearity="relu"
)
else:
torch.nn.init.normal_(conv.weight, std=0.01)
if not use_gn:
nn.init.constant_(conv.bias, 0)
module = [conv,]
if use_gn:
module.append(group_norm(out_channels))
if use_relu:
module.append(nn.ReLU(inplace=True))
if len(module) > 1:
return nn.Sequential(*module)
return conv
def make_fc(dim_in, hidden_dim, use_gn=False):
'''
Caffe2 implementation uses XavierFill, which in fact
corresponds to kaiming_uniform_ in PyTorch
'''
if use_gn:
fc = nn.Linear(dim_in, hidden_dim, bias=False)
nn.init.kaiming_uniform_(fc.weight, a=1)
return nn.Sequential(fc, group_norm(hidden_dim))
fc = nn.Linear(dim_in, hidden_dim)
nn.init.kaiming_uniform_(fc.weight, a=1)
nn.init.constant_(fc.bias, 0)
return fc
def conv_with_kaiming_uniform(use_gn=False, use_relu=False):
def make_conv(
in_channels, out_channels, kernel_size, stride=1, dilation=1
):
conv = Conv2d(
in_channels,
out_channels,
kernel_size=kernel_size,
stride=stride,
padding=dilation * (kernel_size - 1) // 2,
dilation=dilation,
bias=False if use_gn else True
)
# Caffe2 implementation uses XavierFill, which in fact
# corresponds to kaiming_uniform_ in PyTorch
nn.init.kaiming_uniform_(conv.weight, a=1)
if not use_gn:
nn.init.constant_(conv.bias, 0)
module = [conv,]
if use_gn:
module.append(group_norm(out_channels))
if use_relu:
module.append(nn.ReLU(inplace=True))
if len(module) > 1:
return nn.Sequential(*module)
return conv
return make_conv
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/make_layers.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
import torch
class BalancedPositiveNegativeSampler(object):
"""
This class samples batches, ensuring that they contain a fixed proportion of positives
"""
def __init__(self, batch_size_per_image, positive_fraction):
"""
Arguments:
batch_size_per_image (int): number of elements to be selected per image
positive_fraction (float): percentace of positive elements per batch
"""
self.batch_size_per_image = batch_size_per_image
self.positive_fraction = positive_fraction
def __call__(self, matched_idxs):
"""
Arguments:
matched idxs: list of tensors containing -1, 0 or positive values.
Each tensor corresponds to a specific image.
-1 values are ignored, 0 are considered as negatives and > 0 as
positives.
Returns:
pos_idx (list[tensor])
neg_idx (list[tensor])
Returns two lists of binary masks for each image.
The first list contains the positive elements that were selected,
and the second list the negative example.
"""
pos_idx = []
neg_idx = []
for matched_idxs_per_image in matched_idxs:
positive = torch.nonzero(matched_idxs_per_image >= 1).squeeze(1)
negative = torch.nonzero(matched_idxs_per_image == 0).squeeze(1)
num_pos = int(self.batch_size_per_image * self.positive_fraction)
# protect against not enough positive examples
num_pos = min(positive.numel(), num_pos)
num_neg = self.batch_size_per_image - num_pos
# protect against not enough negative examples
num_neg = min(negative.numel(), num_neg)
# randomly select positive and negative examples
perm1 = torch.randperm(positive.numel(), device=positive.device)[:num_pos]
perm2 = torch.randperm(negative.numel(), device=negative.device)[:num_neg]
pos_idx_per_image = positive[perm1]
neg_idx_per_image = negative[perm2]
# create binary mask from indices
pos_idx_per_image_mask = torch.zeros_like(
matched_idxs_per_image, dtype=torch.bool
)
neg_idx_per_image_mask = torch.zeros_like(
matched_idxs_per_image, dtype=torch.bool
)
pos_idx_per_image_mask[pos_idx_per_image] = 1
neg_idx_per_image_mask[neg_idx_per_image] = 1
pos_idx.append(pos_idx_per_image_mask)
neg_idx.append(neg_idx_per_image_mask)
return pos_idx, neg_idx
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/balanced_positive_negative_sampler.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
import torch
import torch.nn.functional as F
from torch import nn
from maskrcnn_benchmark.modeling import registry
from maskrcnn_benchmark.modeling.box_coder import BoxCoder
from .loss import make_rpn_loss_evaluator
from .anchor_generator import make_anchor_generator
from .inference import make_rpn_postprocessor
@registry.RPN_HEADS.register("SingleConvRPNHead")
class RPNHead(nn.Module):
"""
Adds a simple RPN Head with classification and regression heads
"""
def __init__(self, cfg, in_channels, num_anchors):
"""
Arguments:
cfg : config
in_channels (int): number of channels of the input feature
num_anchors (int): number of anchors to be predicted
"""
super(RPNHead, self).__init__()
self.conv = nn.Conv2d(
in_channels, in_channels, kernel_size=3, stride=1, padding=1
)
self.cls_logits = nn.Conv2d(in_channels, num_anchors, kernel_size=1, stride=1)
self.bbox_pred = nn.Conv2d(
in_channels, num_anchors * 4, kernel_size=1, stride=1
)
for l in [self.conv, self.cls_logits, self.bbox_pred]:
torch.nn.init.normal_(l.weight, std=0.01)
torch.nn.init.constant_(l.bias, 0)
def forward(self, x):
logits = []
bbox_reg = []
for feature in x:
t = F.relu(self.conv(feature))
logits.append(self.cls_logits(t))
bbox_reg.append(self.bbox_pred(t))
return logits, bbox_reg
class RPNModule(torch.nn.Module):
"""
Module for RPN computation. Takes feature maps from the backbone and RPN
proposals and losses. Works for both FPN and non-FPN.
"""
def __init__(self, cfg):
super(RPNModule, self).__init__()
self.cfg = cfg.clone()
anchor_generator = make_anchor_generator(cfg)
in_channels = cfg.MODEL.BACKBONE.OUT_CHANNELS
rpn_head = registry.RPN_HEADS[cfg.MODEL.RPN.RPN_HEAD]
head = rpn_head(
cfg, in_channels, anchor_generator.num_anchors_per_location()[0]
)
rpn_box_coder = BoxCoder(weights=(1.0, 1.0, 1.0, 1.0))
box_selector_train = make_rpn_postprocessor(cfg, rpn_box_coder, is_train=True)
box_selector_test = make_rpn_postprocessor(cfg, rpn_box_coder, is_train=False)
loss_evaluator = make_rpn_loss_evaluator(cfg, rpn_box_coder)
self.anchor_generator = anchor_generator
self.head = head
self.box_selector_train = box_selector_train
self.box_selector_test = box_selector_test
self.loss_evaluator = loss_evaluator
def forward(self, images, features, targets=None):
"""
Arguments:
images (ImageList): images for which we want to compute the predictions
features (list[Tensor]): features computed from the images that are
used for computing the predictions. Each tensor in the list
correspond to different feature levels
targets (list[BoxList): ground-truth boxes present in the image (optional)
Returns:
boxes (list[BoxList]): the predicted boxes from the RPN, one BoxList per
image.
losses (dict[Tensor]): the losses for the model during training. During
testing, it is an empty dict.
"""
objectness, rpn_box_regression = self.head(features)
anchors = self.anchor_generator(images, features)
if self.training:
return self._forward_train(anchors, objectness, rpn_box_regression, targets)
else:
return self._forward_test(anchors, objectness, rpn_box_regression)
def _forward_train(self, anchors, objectness, rpn_box_regression, targets):
if self.cfg.MODEL.RPN_ONLY:
# When training an RPN-only model, the loss is determined by the
# predicted objectness and rpn_box_regression values and there is
# no need to transform the anchors into predicted boxes; this is an
# optimization that avoids the unnecessary transformation.
boxes = anchors
else:
# For end-to-end models, anchors must be transformed into boxes and
# sampled into a training batch.
with torch.no_grad():
boxes = self.box_selector_train(
anchors, objectness, rpn_box_regression, targets
)
loss_objectness, loss_rpn_box_reg = self.loss_evaluator(
anchors, objectness, rpn_box_regression, targets
)
losses = {
"loss_objectness": loss_objectness,
"loss_rpn_box_reg": loss_rpn_box_reg,
}
return boxes, losses
def _forward_test(self, anchors, objectness, rpn_box_regression):
boxes = self.box_selector_test(anchors, objectness, rpn_box_regression)
if self.cfg.MODEL.RPN_ONLY:
# For end-to-end models, the RPN proposals are an intermediate state
# and don't bother to sort them in decreasing score order. For RPN-only
# models, the proposals are the final output and we return them in
# high-to-low confidence order.
inds = [
box.get_field("objectness").sort(descending=True)[1] for box in boxes
]
boxes = [box[ind] for box, ind in zip(boxes, inds)]
return boxes, {}
def build_rpn(cfg):
"""
This gives the gist of it. Not super important because it doesn't change as much
"""
return RPNModule(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/rpn/rpn.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# from .rpn import build_rpn
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/rpn/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
"""
This file contains specific functions for computing losses on the RPN
file
"""
import torch
from torch.nn import functional as F
from ..balanced_positive_negative_sampler import BalancedPositiveNegativeSampler
from ..utils import cat
from maskrcnn_benchmark.layers import smooth_l1_loss
from maskrcnn_benchmark.modeling.matcher import Matcher
from maskrcnn_benchmark.structures.boxlist_ops import boxlist_iou
from maskrcnn_benchmark.structures.boxlist_ops import cat_boxlist
class RPNLossComputation(object):
"""
This class computes the RPN loss.
"""
def __init__(self, proposal_matcher, fg_bg_sampler, box_coder):
"""
Arguments:
proposal_matcher (Matcher)
fg_bg_sampler (BalancedPositiveNegativeSampler)
box_coder (BoxCoder)
"""
# self.target_preparator = target_preparator
self.proposal_matcher = proposal_matcher
self.fg_bg_sampler = fg_bg_sampler
self.box_coder = box_coder
def match_targets_to_anchors(self, anchor, target):
match_quality_matrix = boxlist_iou(target, anchor)
matched_idxs = self.proposal_matcher(match_quality_matrix)
# RPN doesn't need any fields from target
# for creating the labels, so clear them all
target = target.copy_with_fields([])
# get the targets corresponding GT for each anchor
# NB: need to clamp the indices because we can have a single
# GT in the image, and matched_idxs can be -2, which goes
# out of bounds
matched_targets = target[matched_idxs.clamp(min=0)]
matched_targets.add_field("matched_idxs", matched_idxs)
return matched_targets
def prepare_targets(self, anchors, targets):
labels = []
regression_targets = []
for anchors_per_image, targets_per_image in zip(anchors, targets):
matched_targets = self.match_targets_to_anchors(
anchors_per_image, targets_per_image
)
matched_idxs = matched_targets.get_field("matched_idxs")
labels_per_image = matched_idxs >= 0
labels_per_image = labels_per_image.to(dtype=torch.float32)
# discard anchors that go out of the boundaries of the image
labels_per_image[~anchors_per_image.get_field("visibility")] = -1
# discard indices that are between thresholds
inds_to_discard = matched_idxs == Matcher.BETWEEN_THRESHOLDS
labels_per_image[inds_to_discard] = -1
# compute regression targets
regression_targets_per_image = self.box_coder.encode(
matched_targets.bbox, anchors_per_image.bbox
)
labels.append(labels_per_image)
regression_targets.append(regression_targets_per_image)
return labels, regression_targets
def __call__(self, anchors, objectness, box_regression, targets):
"""
Arguments:
anchors (list[BoxList])
objectness (list[Tensor])
box_regression (list[Tensor])
targets (list[BoxList])
Returns:
objectness_loss (Tensor)
box_loss (Tensor
"""
anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
labels, regression_targets = self.prepare_targets(anchors, targets)
sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
sampled_pos_inds = torch.nonzero(torch.cat(sampled_pos_inds, dim=0)).squeeze(1)
sampled_neg_inds = torch.nonzero(torch.cat(sampled_neg_inds, dim=0)).squeeze(1)
sampled_inds = torch.cat([sampled_pos_inds, sampled_neg_inds], dim=0)
objectness_flattened = []
box_regression_flattened = []
# for each feature level, permute the outputs to make them be in the
# same format as the labels. Note that the labels are computed for
# all feature levels concatenated, so we keep the same representation
# for the objectness and the box_regression
for objectness_per_level, box_regression_per_level in zip(
objectness, box_regression
):
N, A, H, W = objectness_per_level.shape
objectness_per_level = objectness_per_level.permute(0, 2, 3, 1).reshape(
N, -1
)
box_regression_per_level = box_regression_per_level.view(N, -1, 4, H, W)
box_regression_per_level = box_regression_per_level.permute(0, 3, 4, 1, 2)
box_regression_per_level = box_regression_per_level.reshape(N, -1, 4)
objectness_flattened.append(objectness_per_level)
box_regression_flattened.append(box_regression_per_level)
# concatenate on the first dimension (representing the feature levels), to
# take into account the way the labels were generated (with all feature maps
# being concatenated as well)
objectness = cat(objectness_flattened, dim=1).reshape(-1)
box_regression = cat(box_regression_flattened, dim=1).reshape(-1, 4)
labels = torch.cat(labels, dim=0)
regression_targets = torch.cat(regression_targets, dim=0)
box_loss = smooth_l1_loss(
box_regression[sampled_pos_inds],
regression_targets[sampled_pos_inds],
beta=1.0 / 9,
size_average=False,
) / (sampled_inds.numel())
objectness_loss = F.binary_cross_entropy_with_logits(
objectness[sampled_inds], labels[sampled_inds]
)
return objectness_loss, box_loss
def make_rpn_loss_evaluator(cfg, box_coder):
matcher = Matcher(
cfg.MODEL.RPN.FG_IOU_THRESHOLD,
cfg.MODEL.RPN.BG_IOU_THRESHOLD,
allow_low_quality_matches=True,
)
fg_bg_sampler = BalancedPositiveNegativeSampler(
cfg.MODEL.RPN.BATCH_SIZE_PER_IMAGE, cfg.MODEL.RPN.POSITIVE_FRACTION
)
loss_evaluator = RPNLossComputation(matcher, fg_bg_sampler, box_coder)
return loss_evaluator
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/rpn/loss.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
import math
import numpy as np
import torch
from torch import nn
from maskrcnn_benchmark.structures.bounding_box import BoxList
class BufferList(nn.Module):
"""
Similar to nn.ParameterList, but for buffers
"""
def __init__(self, buffers=None):
super(BufferList, self).__init__()
if buffers is not None:
self.extend(buffers)
def extend(self, buffers):
offset = len(self)
for i, buffer in enumerate(buffers):
self.register_buffer(str(offset + i), buffer)
return self
def __len__(self):
return len(self._buffers)
def __iter__(self):
return iter(self._buffers.values())
class AnchorGenerator(nn.Module):
"""
For a set of image sizes and feature maps, computes a set
of anchors
"""
def __init__(
self,
sizes=(128, 256, 512),
aspect_ratios=(0.5, 1.0, 2.0),
anchor_strides=(8, 16, 32),
straddle_thresh=0,
):
super(AnchorGenerator, self).__init__()
if len(anchor_strides) == 1:
anchor_stride = anchor_strides[0]
cell_anchors = [
generate_anchors(anchor_stride, sizes, aspect_ratios).float()
]
else:
if len(anchor_strides) != len(sizes):
raise RuntimeError("FPN should have #anchor_strides == #sizes")
cell_anchors = [
generate_anchors(anchor_stride, (size,), aspect_ratios).float()
for anchor_stride, size in zip(anchor_strides, sizes)
]
self.strides = anchor_strides
self.cell_anchors = BufferList(cell_anchors)
self.straddle_thresh = straddle_thresh
def num_anchors_per_location(self):
return [len(cell_anchors) for cell_anchors in self.cell_anchors]
def grid_anchors(self, grid_sizes):
anchors = []
for size, stride, base_anchors in zip(
grid_sizes, self.strides, self.cell_anchors
):
grid_height, grid_width = size
device = base_anchors.device
shifts_x = torch.arange(
0, grid_width * stride, step=stride, dtype=torch.float32, device=device
)
shifts_y = torch.arange(
0, grid_height * stride, step=stride, dtype=torch.float32, device=device
)
shift_y, shift_x = torch.meshgrid(shifts_y, shifts_x)
shift_x = shift_x.reshape(-1)
shift_y = shift_y.reshape(-1)
shifts = torch.stack((shift_x, shift_y, shift_x, shift_y), dim=1)
anchors.append(
(shifts.view(-1, 1, 4) + base_anchors.view(1, -1, 4)).reshape(-1, 4)
)
return anchors
def add_visibility_to(self, boxlist):
image_width, image_height = boxlist.size
anchors = boxlist.bbox
if self.straddle_thresh >= 0:
inds_inside = (
(anchors[..., 0] >= -self.straddle_thresh)
& (anchors[..., 1] >= -self.straddle_thresh)
& (anchors[..., 2] < image_width + self.straddle_thresh)
& (anchors[..., 3] < image_height + self.straddle_thresh)
)
else:
device = anchors.device
inds_inside = torch.ones(anchors.shape[0], dtype=torch.bool, device=device)
boxlist.add_field("visibility", inds_inside)
def forward(self, image_list, feature_maps):
grid_sizes = [feature_map.shape[-2:] for feature_map in feature_maps]
anchors_over_all_feature_maps = self.grid_anchors(grid_sizes)
anchors = []
for i, (image_height, image_width) in enumerate(image_list.image_sizes):
anchors_in_image = []
for anchors_per_feature_map in anchors_over_all_feature_maps:
boxlist = BoxList(
anchors_per_feature_map, (image_width, image_height), mode="xyxy"
)
self.add_visibility_to(boxlist)
anchors_in_image.append(boxlist)
anchors.append(anchors_in_image)
return anchors
def make_anchor_generator(config):
anchor_sizes = config.MODEL.RPN.ANCHOR_SIZES
aspect_ratios = config.MODEL.RPN.ASPECT_RATIOS
anchor_stride = config.MODEL.RPN.ANCHOR_STRIDE
straddle_thresh = config.MODEL.RPN.STRADDLE_THRESH
if config.MODEL.RPN.USE_FPN:
assert len(anchor_stride) == len(
anchor_sizes
), "FPN should have len(ANCHOR_STRIDE) == len(ANCHOR_SIZES)"
else:
assert len(anchor_stride) == 1, "Non-FPN should have a single ANCHOR_STRIDE"
anchor_generator = AnchorGenerator(
anchor_sizes, aspect_ratios, anchor_stride, straddle_thresh
)
return anchor_generator
# Copyright (c) 2017-present, Facebook, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##############################################################################
#
# Based on:
# --------------------------------------------------------
# Faster R-CNN
# Copyright (c) 2015 Microsoft
# Licensed under The MIT License [see LICENSE for details]
# Written by Ross Girshick and Sean Bell
# --------------------------------------------------------
# Verify that we compute the same anchors as Shaoqing's matlab implementation:
#
# >> load output/rpn_cachedir/faster_rcnn_VOC2007_ZF_stage1_rpn/anchors.mat
# >> anchors
#
# anchors =
#
# -83 -39 100 56
# -175 -87 192 104
# -359 -183 376 200
# -55 -55 72 72
# -119 -119 136 136
# -247 -247 264 264
# -35 -79 52 96
# -79 -167 96 184
# -167 -343 184 360
# array([[ -83., -39., 100., 56.],
# [-175., -87., 192., 104.],
# [-359., -183., 376., 200.],
# [ -55., -55., 72., 72.],
# [-119., -119., 136., 136.],
# [-247., -247., 264., 264.],
# [ -35., -79., 52., 96.],
# [ -79., -167., 96., 184.],
# [-167., -343., 184., 360.]])
def generate_anchors(
stride=16, sizes=(32, 64, 128, 256, 512), aspect_ratios=(0.5, 1, 2)
):
"""Generates a matrix of anchor boxes in (x1, y1, x2, y2) format. Anchors
are centered on stride / 2, have (approximate) sqrt areas of the specified
sizes, and aspect ratios as given.
"""
return _generate_anchors(
stride,
np.array(sizes, dtype=np.float) / stride,
np.array(aspect_ratios, dtype=np.float),
)
def _generate_anchors(base_size, scales, aspect_ratios):
"""Generate anchor (reference) windows by enumerating aspect ratios X
scales wrt a reference (0, 0, base_size - 1, base_size - 1) window.
"""
anchor = np.array([1, 1, base_size, base_size], dtype=np.float) - 1
anchors = _ratio_enum(anchor, aspect_ratios)
anchors = np.vstack(
[_scale_enum(anchors[i, :], scales) for i in range(anchors.shape[0])]
)
return torch.from_numpy(anchors)
def _whctrs(anchor):
"""Return width, height, x center, and y center for an anchor (window)."""
w = anchor[2] - anchor[0] + 1
h = anchor[3] - anchor[1] + 1
x_ctr = anchor[0] + 0.5 * (w - 1)
y_ctr = anchor[1] + 0.5 * (h - 1)
return w, h, x_ctr, y_ctr
def _mkanchors(ws, hs, x_ctr, y_ctr):
"""Given a vector of widths (ws) and heights (hs) around a center
(x_ctr, y_ctr), output a set of anchors (windows).
"""
ws = ws[:, np.newaxis]
hs = hs[:, np.newaxis]
anchors = np.hstack(
(
x_ctr - 0.5 * (ws - 1),
y_ctr - 0.5 * (hs - 1),
x_ctr + 0.5 * (ws - 1),
y_ctr + 0.5 * (hs - 1),
)
)
return anchors
def _ratio_enum(anchor, ratios):
"""Enumerate a set of anchors for each aspect ratio wrt an anchor."""
w, h, x_ctr, y_ctr = _whctrs(anchor)
size = w * h
size_ratios = size / ratios
ws = np.round(np.sqrt(size_ratios))
hs = np.round(ws * ratios)
anchors = _mkanchors(ws, hs, x_ctr, y_ctr)
return anchors
def _scale_enum(anchor, scales):
"""Enumerate a set of anchors for each scale wrt an anchor."""
w, h, x_ctr, y_ctr = _whctrs(anchor)
ws = w * scales
hs = h * scales
anchors = _mkanchors(ws, hs, x_ctr, y_ctr)
return anchors
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/rpn/anchor_generator.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
from maskrcnn_benchmark.modeling.box_coder import BoxCoder
from maskrcnn_benchmark.structures.bounding_box import BoxList
from maskrcnn_benchmark.structures.boxlist_ops import cat_boxlist
from maskrcnn_benchmark.structures.boxlist_ops import boxlist_nms
from maskrcnn_benchmark.structures.boxlist_ops import remove_small_boxes
from ..utils import cat
from maskrcnn_benchmark import _C as C
class RPNPostProcessor(torch.nn.Module):
"""
Performs post-processing on the outputs of the RPN boxes, before feeding the
proposals to the heads
"""
def __init__(
self,
pre_nms_top_n,
post_nms_top_n,
nms_thresh,
min_size,
box_coder=None,
fpn_post_nms_top_n=None,
):
"""
Arguments:
pre_nms_top_n (int)
post_nms_top_n (int)
nms_thresh (float)
min_size (int)
box_coder (BoxCoder)
fpn_post_nms_top_n (int)
"""
super(RPNPostProcessor, self).__init__()
self.pre_nms_top_n = pre_nms_top_n
self.post_nms_top_n = post_nms_top_n
self.nms_thresh = nms_thresh
self.min_size = min_size
if box_coder is None:
box_coder = BoxCoder(weights=(1.0, 1.0, 1.0, 1.0))
self.box_coder = box_coder
if fpn_post_nms_top_n is None:
fpn_post_nms_top_n = post_nms_top_n
self.fpn_post_nms_top_n = fpn_post_nms_top_n
def add_gt_proposals(self, proposals, targets):
"""
Arguments:
proposals: list[BoxList]
targets: list[BoxList]
"""
# Get the device we're operating on
device = proposals[0].bbox.device
gt_boxes = [target.copy_with_fields([]) for target in targets]
# later cat of bbox requires all fields to be present for all bbox
# so we need to add a dummy for objectness that's missing
for gt_box in gt_boxes:
gt_box.add_field("objectness", torch.ones(len(gt_box), device=device))
proposals = [
cat_boxlist((proposal, gt_box))
for proposal, gt_box in zip(proposals, gt_boxes)
]
return proposals
def forward_for_single_feature_map(self, anchors, objectness, box_regression):
"""
Arguments:
anchors: list[BoxList]
objectness: tensor of size N, A, H, W
box_regression: tensor of size N, A * 4, H, W
"""
device = objectness.device
N, A, H, W = objectness.shape
num_anchors = A * H * W
# If inputs are on GPU, use a faster path
use_fast_cuda_path = (objectness.is_cuda and box_regression.is_cuda)
# Encompasses box decode, clip_to_image and remove_small_boxes calls
if use_fast_cuda_path:
objectness = objectness.reshape(N, -1) # Now [N, AHW]
objectness = objectness.sigmoid()
pre_nms_top_n = min(self.pre_nms_top_n, num_anchors)
objectness, topk_idx = objectness.topk(pre_nms_top_n, dim=1, sorted=True)
# Get all image shapes, and cat them together
image_shapes = [box.size for box in anchors]
image_shapes_cat = torch.tensor([box.size for box in anchors], device=objectness.device).float()
# Get a single tensor for all anchors
concat_anchors = torch.cat([a.bbox for a in anchors], dim=0)
# Note: Take all anchors, we'll index accordingly inside the kernel
# only take the anchors corresponding to the topk boxes
concat_anchors = concat_anchors.reshape(N, -1, 4) # [batch_idx, topk_idx]
# Return pre-nms boxes, associated scores and keep flag
# Encompasses:
# 1. Box decode
# 2. Box clipping
# 3. Box filtering
# At the end we need to keep only the proposals & scores flagged
# Note: topk_idx, objectness are sorted => proposals, objectness, keep are also
# sorted -- this is important later
use_nhwc_kernel = box_regression.is_contiguous(memory_format=torch.channels_last)
proposals, objectness, keep = C.GeneratePreNMSUprightBoxes(
N,
A,
H,
W,
topk_idx,
objectness.float(), # Need to cast these as kernel doesn't support fp16
box_regression.float(),
concat_anchors,
image_shapes_cat,
pre_nms_top_n,
self.min_size,
self.box_coder.bbox_xform_clip,
True,
use_nhwc_kernel)
# view as [N, pre_nms_top_n, 4]
proposals = proposals.view(N, -1, 4)
objectness = objectness.view(N, -1)
else:
# reverse the reshape from before ready for permutation
objectness = objectness.reshape(N, A, H, W)
objectness = objectness.permute(0, 2, 3, 1).reshape(N, -1)
objectness = objectness.sigmoid()
pre_nms_top_n = min(self.pre_nms_top_n, num_anchors)
objectness, topk_idx = objectness.topk(pre_nms_top_n, dim=1, sorted=True)
# put in the same format as anchors
box_regression = box_regression.view(N, -1, 4, H, W).permute(0, 3, 4, 1, 2)
box_regression = box_regression.reshape(N, -1, 4)
batch_idx = torch.arange(N, device=device)[:, None]
box_regression = box_regression[batch_idx, topk_idx]
image_shapes = [box.size for box in anchors]
concat_anchors = torch.cat([a.bbox for a in anchors], dim=0)
concat_anchors = concat_anchors.reshape(N, -1, 4)[batch_idx, topk_idx]
proposals = self.box_coder.decode(
box_regression.view(-1, 4), concat_anchors.view(-1, 4)
)
proposals = proposals.view(N, -1, 4)
# handle non-fast path without changing the loop
if not use_fast_cuda_path:
keep = [None for _ in range(N)]
result = []
keep = keep.to(torch.bool)
for proposal, score, im_shape, k in zip(proposals, objectness, image_shapes, keep):
if use_fast_cuda_path:
# Note: Want k to be applied per-image instead of all-at-once in batched code earlier
# clip_to_image and remove_small_boxes already done in single kernel
p = proposal.masked_select(k[:, None]).view(-1, 4)
score = score.masked_select(k)
boxlist = BoxList(p, im_shape, mode="xyxy")
else:
boxlist = BoxList(proposal, im_shape, mode="xyxy")
boxlist = boxlist.clip_to_image(remove_empty=False)
boxlist = remove_small_boxes(boxlist, self.min_size)
boxlist.add_field("objectness", score)
boxlist = boxlist_nms(
boxlist,
self.nms_thresh,
max_proposals=self.post_nms_top_n,
score_field="objectness",
)
result.append(boxlist)
return result
def forward(self, anchors, objectness, box_regression, targets=None):
"""
Arguments:
anchors: list[list[BoxList]]
objectness: list[tensor]
box_regression: list[tensor]
Returns:
boxlists (list[BoxList]): the post-processed anchors, after
applying box decoding and NMS
"""
sampled_boxes = []
num_levels = len(objectness)
anchors = list(zip(*anchors))
for a, o, b in zip(anchors, objectness, box_regression):
sampled_boxes.append(self.forward_for_single_feature_map(a, o, b))
boxlists = list(zip(*sampled_boxes))
boxlists = [cat_boxlist(boxlist) for boxlist in boxlists]
if num_levels > 1:
boxlists = self.select_over_all_levels(boxlists)
# append ground-truth bboxes to proposals
if self.training and targets is not None:
boxlists = self.add_gt_proposals(boxlists, targets)
return boxlists
def select_over_all_levels(self, boxlists):
num_images = len(boxlists)
# different behavior during training and during testing:
# during training, post_nms_top_n is over *all* the proposals combined, while
# during testing, it is over the proposals for each image
# TODO resolve this difference and make it consistent. It should be per image,
# and not per batch
if self.training:
objectness = torch.cat(
[boxlist.get_field("objectness") for boxlist in boxlists], dim=0
)
box_sizes = [len(boxlist) for boxlist in boxlists]
post_nms_top_n = min(self.fpn_post_nms_top_n, len(objectness))
_, inds_sorted = torch.topk(objectness, post_nms_top_n, dim=0, sorted=True)
inds_mask = torch.zeros_like(objectness, dtype=torch.bool)
inds_mask[inds_sorted] = 1
inds_mask = inds_mask.split(box_sizes)
for i in range(num_images):
boxlists[i] = boxlists[i][inds_mask[i]]
else:
for i in range(num_images):
objectness = boxlists[i].get_field("objectness")
post_nms_top_n = min(self.fpn_post_nms_top_n, len(objectness))
_, inds_sorted = torch.topk(
objectness, post_nms_top_n, dim=0, sorted=True
)
boxlists[i] = boxlists[i][inds_sorted]
return boxlists
def make_rpn_postprocessor(config, rpn_box_coder, is_train):
fpn_post_nms_top_n = config.MODEL.RPN.FPN_POST_NMS_TOP_N_TRAIN
if not is_train:
fpn_post_nms_top_n = config.MODEL.RPN.FPN_POST_NMS_TOP_N_TEST
pre_nms_top_n = config.MODEL.RPN.PRE_NMS_TOP_N_TRAIN
post_nms_top_n = config.MODEL.RPN.POST_NMS_TOP_N_TRAIN
if not is_train:
pre_nms_top_n = config.MODEL.RPN.PRE_NMS_TOP_N_TEST
post_nms_top_n = config.MODEL.RPN.POST_NMS_TOP_N_TEST
nms_thresh = config.MODEL.RPN.NMS_THRESH
min_size = config.MODEL.RPN.MIN_SIZE
box_selector = RPNPostProcessor(
pre_nms_top_n=pre_nms_top_n,
post_nms_top_n=post_nms_top_n,
nms_thresh=nms_thresh,
min_size=min_size,
box_coder=rpn_box_coder,
fpn_post_nms_top_n=fpn_post_nms_top_n,
)
return box_selector
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/rpn/inference.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
"""
Implements the Generalized R-CNN framework
"""
import torch
from torch import nn
from maskrcnn_benchmark.structures.image_list import to_image_list
from ..backbone import build_backbone
from ..rpn.rpn import build_rpn
from ..roi_heads.roi_heads import build_roi_heads
class GeneralizedRCNN(nn.Module):
"""
Main class for Generalized R-CNN. Currently supports boxes and masks.
It consists of three main parts:
- backbone
- rpn
- heads: takes the features + the proposals from the RPN and computes
detections / masks from it.
"""
def __init__(self, cfg):
super(GeneralizedRCNN, self).__init__()
self.backbone = build_backbone(cfg)
self.rpn = build_rpn(cfg)
self.roi_heads = build_roi_heads(cfg)
def forward(self, images, targets=None):
"""
Arguments:
images (list[Tensor] or ImageList): images to be processed
targets (list[BoxList]): ground-truth boxes present in the image (optional)
Returns:
result (list[BoxList] or dict[Tensor]): the output from the model.
During training, it returns a dict[Tensor] which contains the losses.
During testing, it returns list[BoxList] contains additional fields
like `scores`, `labels` and `mask` (for Mask R-CNN models).
"""
if self.training and targets is None:
raise ValueError("In training mode, targets should be passed")
images = to_image_list(images)
features = self.backbone(images.tensors)
proposals, proposal_losses = self.rpn(images, features, targets)
if self.roi_heads:
x, result, detector_losses = self.roi_heads(features, proposals, targets)
else:
# RPN-only models don't have roi_heads
x = features
result = proposals
detector_losses = {}
if self.training:
losses = {}
losses.update(detector_losses)
losses.update(proposal_losses)
return losses
return result
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/detector/generalized_rcnn.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from .detectors import build_detection_model
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/detector/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from .generalized_rcnn import GeneralizedRCNN
_DETECTION_META_ARCHITECTURES = {"GeneralizedRCNN": GeneralizedRCNN}
def build_detection_model(cfg):
meta_arch = _DETECTION_META_ARCHITECTURES[cfg.MODEL.META_ARCHITECTURE]
return meta_arch(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/detector/detectors.py |
DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/__init__.py |
|
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from .box_head.box_head import build_roi_box_head
from .mask_head.mask_head import build_roi_mask_head
class CombinedROIHeads(torch.nn.ModuleDict):
"""
Combines a set of individual heads (for box prediction or masks) into a single
head.
"""
def __init__(self, cfg, heads):
super(CombinedROIHeads, self).__init__(heads)
self.cfg = cfg.clone()
if cfg.MODEL.MASK_ON and cfg.MODEL.ROI_MASK_HEAD.SHARE_BOX_FEATURE_EXTRACTOR:
self.mask.feature_extractor = self.box.feature_extractor
def forward(self, features, proposals, targets=None):
losses = {}
# TODO rename x to roi_box_features, if it doesn't increase memory consumption
x, detections, loss_box = self.box(features, proposals, targets)
losses.update(loss_box)
if self.cfg.MODEL.MASK_ON:
mask_features = features
# optimization: during training, if we share the feature extractor between
# the box and the mask heads, then we can reuse the features already computed
if (
self.training
and self.cfg.MODEL.ROI_MASK_HEAD.SHARE_BOX_FEATURE_EXTRACTOR
):
mask_features = x
# During training, self.box() will return the unaltered proposals as "detections"
# this makes the API consistent during training and testing
x, detections, loss_mask = self.mask(mask_features, detections, targets)
losses.update(loss_mask)
return x, detections, losses
def build_roi_heads(cfg):
# individually create the heads, that will be combined together
# afterwards
roi_heads = []
if not cfg.MODEL.RPN_ONLY:
roi_heads.append(("box", build_roi_box_head(cfg)))
if cfg.MODEL.MASK_ON:
roi_heads.append(("mask", build_roi_mask_head(cfg)))
# combine individual heads in a single module
if roi_heads:
roi_heads = CombinedROIHeads(cfg, roi_heads)
return roi_heads
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/roi_heads.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from torch import nn
from .roi_box_feature_extractors import make_roi_box_feature_extractor
from .roi_box_predictors import make_roi_box_predictor
from .inference import make_roi_box_post_processor
from .loss import make_roi_box_loss_evaluator
class ROIBoxHead(torch.nn.Module):
"""
Generic Box Head class.
"""
def __init__(self, cfg):
super(ROIBoxHead, self).__init__()
self.feature_extractor = make_roi_box_feature_extractor(cfg)
self.predictor = make_roi_box_predictor(cfg)
self.post_processor = make_roi_box_post_processor(cfg)
self.loss_evaluator = make_roi_box_loss_evaluator(cfg)
def forward(self, features, proposals, targets=None):
"""
Arguments:
features (list[Tensor]): feature-maps from possibly several levels
proposals (list[BoxList]): proposal boxes
targets (list[BoxList], optional): the ground-truth targets.
Returns:
x (Tensor): the result of the feature extractor
proposals (list[BoxList]): during training, the subsampled proposals
are returned. During testing, the predicted boxlists are returned
losses (dict[Tensor]): During training, returns the losses for the
head. During testing, returns an empty dict.
"""
if self.training:
# Faster R-CNN subsamples during training the proposals with a fixed
# positive / negative ratio
with torch.no_grad():
proposals = self.loss_evaluator.subsample(proposals, targets)
# extract features that will be fed to the final classifier. The
# feature_extractor generally corresponds to the pooler + heads
x = self.feature_extractor(features, proposals)
# final classifier that converts the features into predictions
class_logits, box_regression = self.predictor(x)
if not self.training:
result = self.post_processor((class_logits, box_regression), proposals)
return x, result, {}
loss_classifier, loss_box_reg = self.loss_evaluator(
[class_logits], [box_regression]
)
return (
x,
proposals,
dict(loss_classifier=loss_classifier, loss_box_reg=loss_box_reg),
)
def build_roi_box_head(cfg):
"""
Constructs a new box head.
By default, uses ROIBoxHead, but if it turns out not to be enough, just register a new class
and make it a parameter in the config
"""
return ROIBoxHead(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/box_head/box_head.py |
DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/box_head/__init__.py |
|
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from torch.nn import functional as F
from maskrcnn_benchmark.layers import smooth_l1_loss
from maskrcnn_benchmark.modeling.box_coder import BoxCoder
from maskrcnn_benchmark.modeling.matcher import Matcher
from maskrcnn_benchmark.structures.boxlist_ops import boxlist_iou
from maskrcnn_benchmark.modeling.balanced_positive_negative_sampler import (
BalancedPositiveNegativeSampler
)
from maskrcnn_benchmark.modeling.utils import cat
class FastRCNNLossComputation(object):
"""
Computes the loss for Faster R-CNN.
Also supports FPN
"""
def __init__(self, proposal_matcher, fg_bg_sampler, box_coder):
"""
Arguments:
proposal_matcher (Matcher)
fg_bg_sampler (BalancedPositiveNegativeSampler)
box_coder (BoxCoder)
"""
self.proposal_matcher = proposal_matcher
self.fg_bg_sampler = fg_bg_sampler
self.box_coder = box_coder
def match_targets_to_proposals(self, proposal, target):
match_quality_matrix = boxlist_iou(target, proposal)
matched_idxs = self.proposal_matcher(match_quality_matrix)
# Fast RCNN only need "labels" field for selecting the targets
target = target.copy_with_fields("labels")
# get the targets corresponding GT for each proposal
# NB: need to clamp the indices because we can have a single
# GT in the image, and matched_idxs can be -2, which goes
# out of bounds
matched_targets = target[matched_idxs.clamp(min=0)]
matched_targets.add_field("matched_idxs", matched_idxs)
return matched_targets
def prepare_targets(self, proposals, targets):
labels = []
regression_targets = []
for proposals_per_image, targets_per_image in zip(proposals, targets):
matched_targets = self.match_targets_to_proposals(
proposals_per_image, targets_per_image
)
matched_idxs = matched_targets.get_field("matched_idxs")
labels_per_image = matched_targets.get_field("labels")
labels_per_image = labels_per_image.to(dtype=torch.int64)
# Label background (below the low threshold)
bg_inds = matched_idxs == Matcher.BELOW_LOW_THRESHOLD
labels_per_image[bg_inds] = 0
# Label ignore proposals (between low and high thresholds)
ignore_inds = matched_idxs == Matcher.BETWEEN_THRESHOLDS
labels_per_image[ignore_inds] = -1 # -1 is ignored by sampler
# compute regression targets
regression_targets_per_image = self.box_coder.encode(
matched_targets.bbox, proposals_per_image.bbox
)
labels.append(labels_per_image)
regression_targets.append(regression_targets_per_image)
return labels, regression_targets
def subsample(self, proposals, targets):
"""
This method performs the positive/negative sampling, and return
the sampled proposals.
Note: this function keeps a state.
Arguments:
proposals (list[BoxList])
targets (list[BoxList])
"""
labels, regression_targets = self.prepare_targets(proposals, targets)
sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
proposals = list(proposals)
# add corresponding label and regression_targets information to the bounding boxes
for labels_per_image, regression_targets_per_image, proposals_per_image in zip(
labels, regression_targets, proposals
):
proposals_per_image.add_field("labels", labels_per_image)
proposals_per_image.add_field(
"regression_targets", regression_targets_per_image
)
# distributed sampled proposals, that were obtained on all feature maps
# concatenated via the fg_bg_sampler, into individual feature map levels
for img_idx, (pos_inds_img, neg_inds_img) in enumerate(
zip(sampled_pos_inds, sampled_neg_inds)
):
img_sampled_inds = torch.nonzero(pos_inds_img | neg_inds_img).squeeze(1)
proposals_per_image = proposals[img_idx][img_sampled_inds]
proposals[img_idx] = proposals_per_image
self._proposals = proposals
return proposals
def __call__(self, class_logits, box_regression):
"""
Computes the loss for Faster R-CNN.
This requires that the subsample method has been called beforehand.
Arguments:
class_logits (list[Tensor])
box_regression (list[Tensor])
Returns:
classification_loss (Tensor)
box_loss (Tensor)
"""
class_logits = cat(class_logits, dim=0)
box_regression = cat(box_regression, dim=0)
device = class_logits.device
if not hasattr(self, "_proposals"):
raise RuntimeError("subsample needs to be called before")
proposals = self._proposals
labels = cat([proposal.get_field("labels") for proposal in proposals], dim=0)
regression_targets = cat(
[proposal.get_field("regression_targets") for proposal in proposals], dim=0
)
classification_loss = F.cross_entropy(class_logits, labels)
# get indices that correspond to the regression targets for
# the corresponding ground truth labels, to be used with
# advanced indexing
sampled_pos_inds_subset = torch.nonzero(labels > 0).squeeze(1)
labels_pos = labels[sampled_pos_inds_subset]
map_inds = 4 * labels_pos[:, None] + torch.tensor([0, 1, 2, 3], device=device)
box_loss = smooth_l1_loss(
box_regression[sampled_pos_inds_subset[:, None], map_inds],
regression_targets[sampled_pos_inds_subset],
size_average=False,
beta=1,
)
box_loss = box_loss / labels.numel()
return classification_loss, box_loss
def make_roi_box_loss_evaluator(cfg):
matcher = Matcher(
cfg.MODEL.ROI_HEADS.FG_IOU_THRESHOLD,
cfg.MODEL.ROI_HEADS.BG_IOU_THRESHOLD,
allow_low_quality_matches=False,
)
bbox_reg_weights = cfg.MODEL.ROI_HEADS.BBOX_REG_WEIGHTS
box_coder = BoxCoder(weights=bbox_reg_weights)
fg_bg_sampler = BalancedPositiveNegativeSampler(
cfg.MODEL.ROI_HEADS.BATCH_SIZE_PER_IMAGE, cfg.MODEL.ROI_HEADS.POSITIVE_FRACTION
)
loss_evaluator = FastRCNNLossComputation(matcher, fg_bg_sampler, box_coder)
return loss_evaluator
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/box_head/loss.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
import torch.nn.functional as F
from torch import nn
from maskrcnn_benchmark.structures.bounding_box import BoxList
from maskrcnn_benchmark.structures.boxlist_ops import boxlist_nms
from maskrcnn_benchmark.structures.boxlist_ops import cat_boxlist
from maskrcnn_benchmark.modeling.box_coder import BoxCoder
class PostProcessor(nn.Module):
"""
From a set of classification scores, box regression and proposals,
computes the post-processed boxes, and applies NMS to obtain the
final results
"""
def __init__(
self, score_thresh=0.05, nms=0.5, detections_per_img=100, box_coder=None
):
"""
Arguments:
score_thresh (float)
nms (float)
detections_per_img (int)
box_coder (BoxCoder)
"""
super(PostProcessor, self).__init__()
self.score_thresh = score_thresh
self.nms = nms
self.detections_per_img = detections_per_img
if box_coder is None:
box_coder = BoxCoder(weights=(10., 10., 5., 5.))
self.box_coder = box_coder
def forward(self, x, boxes):
"""
Arguments:
x (tuple[tensor, tensor]): x contains the class logits
and the box_regression from the model.
boxes (list[BoxList]): bounding boxes that are used as
reference, one for ech image
Returns:
results (list[BoxList]): one BoxList for each image, containing
the extra fields labels and scores
"""
class_logits, box_regression = x
class_prob = F.softmax(class_logits, -1)
# TODO think about a representation of batch of boxes
image_shapes = [box.size for box in boxes]
boxes_per_image = [len(box) for box in boxes]
concat_boxes = torch.cat([a.bbox for a in boxes], dim=0)
proposals = self.box_coder.decode(
box_regression.view(sum(boxes_per_image), -1), concat_boxes
)
num_classes = class_prob.shape[1]
proposals = proposals.split(boxes_per_image, dim=0)
class_prob = class_prob.split(boxes_per_image, dim=0)
results = []
for prob, boxes_per_img, image_shape in zip(
class_prob, proposals, image_shapes
):
boxlist = self.prepare_boxlist(boxes_per_img, prob, image_shape)
boxlist = boxlist.clip_to_image(remove_empty=False)
boxlist = self.filter_results(boxlist, num_classes)
results.append(boxlist)
return results
def prepare_boxlist(self, boxes, scores, image_shape):
"""
Returns BoxList from `boxes` and adds probability scores information
as an extra field
`boxes` has shape (#detections, 4 * #classes), where each row represents
a list of predicted bounding boxes for each of the object classes in the
dataset (including the background class). The detections in each row
originate from the same object proposal.
`scores` has shape (#detection, #classes), where each row represents a list
of object detection confidence scores for each of the object classes in the
dataset (including the background class). `scores[i, j]`` corresponds to the
box at `boxes[i, j * 4:(j + 1) * 4]`.
"""
boxes = boxes.reshape(-1, 4)
scores = scores.reshape(-1)
boxlist = BoxList(boxes, image_shape, mode="xyxy")
boxlist.add_field("scores", scores)
return boxlist
def filter_results(self, boxlist, num_classes):
"""Returns bounding-box detection results by thresholding on scores and
applying non-maximum suppression (NMS).
"""
# unwrap the boxlist to avoid additional overhead.
# if we had multi-class NMS, we could perform this directly on the boxlist
boxes = boxlist.bbox.reshape(-1, num_classes * 4)
scores = boxlist.get_field("scores").reshape(-1, num_classes)
device = scores.device
result = []
# Apply threshold on detection probabilities and apply NMS
# Skip j = 0, because it's the background class
inds_all = scores > self.score_thresh
for j in range(1, num_classes):
inds = inds_all[:, j].nonzero().squeeze(1)
scores_j = scores[inds, j]
boxes_j = boxes[inds, j * 4 : (j + 1) * 4]
boxlist_for_class = BoxList(boxes_j, boxlist.size, mode="xyxy")
boxlist_for_class.add_field("scores", scores_j)
boxlist_for_class = boxlist_nms(
boxlist_for_class, self.nms, score_field="scores"
)
num_labels = len(boxlist_for_class)
boxlist_for_class.add_field(
"labels", torch.full((num_labels,), j, dtype=torch.int64, device=device)
)
result.append(boxlist_for_class)
result = cat_boxlist(result)
number_of_detections = len(result)
# Limit to max_per_image detections **over all classes**
if number_of_detections > self.detections_per_img > 0:
cls_scores = result.get_field("scores")
image_thresh, _ = torch.kthvalue(
cls_scores.cpu(), number_of_detections - self.detections_per_img + 1
)
keep = cls_scores >= image_thresh.item()
keep = torch.nonzero(keep).squeeze(1)
result = result[keep]
return result
def make_roi_box_post_processor(cfg):
use_fpn = cfg.MODEL.ROI_HEADS.USE_FPN
bbox_reg_weights = cfg.MODEL.ROI_HEADS.BBOX_REG_WEIGHTS
box_coder = BoxCoder(weights=bbox_reg_weights)
score_thresh = cfg.MODEL.ROI_HEADS.SCORE_THRESH
nms_thresh = cfg.MODEL.ROI_HEADS.NMS
detections_per_img = cfg.MODEL.ROI_HEADS.DETECTIONS_PER_IMG
postprocessor = PostProcessor(
score_thresh, nms_thresh, detections_per_img, box_coder
)
return postprocessor
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/box_head/inference.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from torch import nn
class FastRCNNPredictor(nn.Module):
def __init__(self, config, pretrained=None):
super(FastRCNNPredictor, self).__init__()
stage_index = 4
stage2_relative_factor = 2 ** (stage_index - 1)
res2_out_channels = config.MODEL.RESNETS.RES2_OUT_CHANNELS
num_inputs = res2_out_channels * stage2_relative_factor
num_classes = config.MODEL.ROI_BOX_HEAD.NUM_CLASSES
self.avgpool = nn.AvgPool2d(kernel_size=7, stride=7)
self.cls_score = nn.Linear(num_inputs, num_classes)
self.bbox_pred = nn.Linear(num_inputs, num_classes * 4)
nn.init.normal_(self.cls_score.weight, mean=0, std=0.01)
nn.init.constant_(self.cls_score.bias, 0)
nn.init.normal_(self.bbox_pred.weight, mean=0, std=0.001)
nn.init.constant_(self.bbox_pred.bias, 0)
def forward(self, x):
x = self.avgpool(x)
x = x.view(x.size(0), -1)
cls_logit = self.cls_score(x)
bbox_pred = self.bbox_pred(x)
return cls_logit, bbox_pred
class FPNPredictor(nn.Module):
def __init__(self, cfg):
super(FPNPredictor, self).__init__()
num_classes = cfg.MODEL.ROI_BOX_HEAD.NUM_CLASSES
representation_size = cfg.MODEL.ROI_BOX_HEAD.MLP_HEAD_DIM
self.cls_score = nn.Linear(representation_size, num_classes)
self.bbox_pred = nn.Linear(representation_size, num_classes * 4)
nn.init.normal_(self.cls_score.weight, std=0.01)
nn.init.normal_(self.bbox_pred.weight, std=0.001)
for l in [self.cls_score, self.bbox_pred]:
nn.init.constant_(l.bias, 0)
def forward(self, x):
scores = self.cls_score(x)
bbox_deltas = self.bbox_pred(x)
return scores, bbox_deltas
_ROI_BOX_PREDICTOR = {
"FastRCNNPredictor": FastRCNNPredictor,
"FPNPredictor": FPNPredictor,
}
def make_roi_box_predictor(cfg):
func = _ROI_BOX_PREDICTOR[cfg.MODEL.ROI_BOX_HEAD.PREDICTOR]
return func(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/box_head/roi_box_predictors.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
from torch import nn
from torch.nn import functional as F
from maskrcnn_benchmark.modeling import registry
from maskrcnn_benchmark.modeling.backbone import resnet
from maskrcnn_benchmark.modeling.poolers import Pooler
from maskrcnn_benchmark.modeling.make_layers import group_norm
from maskrcnn_benchmark.modeling.make_layers import make_fc
@registry.ROI_BOX_FEATURE_EXTRACTORS.register("ResNet50Conv5ROIFeatureExtractor")
class ResNet50Conv5ROIFeatureExtractor(nn.Module):
def __init__(self, config):
super(ResNet50Conv5ROIFeatureExtractor, self).__init__()
resolution = config.MODEL.ROI_BOX_HEAD.POOLER_RESOLUTION
scales = config.MODEL.ROI_BOX_HEAD.POOLER_SCALES
sampling_ratio = config.MODEL.ROI_BOX_HEAD.POOLER_SAMPLING_RATIO
pooler = Pooler(
output_size=(resolution, resolution),
scales=scales,
sampling_ratio=sampling_ratio,
)
stage = resnet.StageSpec(index=4, block_count=3, return_features=False)
head = resnet.ResNetHead(
block_module=config.MODEL.RESNETS.TRANS_FUNC,
stages=(stage,),
num_groups=config.MODEL.RESNETS.NUM_GROUPS,
width_per_group=config.MODEL.RESNETS.WIDTH_PER_GROUP,
stride_in_1x1=config.MODEL.RESNETS.STRIDE_IN_1X1,
stride_init=None,
res2_out_channels=config.MODEL.RESNETS.RES2_OUT_CHANNELS,
dilation=config.MODEL.RESNETS.RES5_DILATION
)
self.pooler = pooler
self.head = head
def forward(self, x, proposals):
x = self.pooler(x, proposals)
x = self.head(x)
return x
@registry.ROI_BOX_FEATURE_EXTRACTORS.register("FPN2MLPFeatureExtractor")
class FPN2MLPFeatureExtractor(nn.Module):
"""
Heads for FPN for classification
"""
def __init__(self, cfg):
super(FPN2MLPFeatureExtractor, self).__init__()
resolution = cfg.MODEL.ROI_BOX_HEAD.POOLER_RESOLUTION
scales = cfg.MODEL.ROI_BOX_HEAD.POOLER_SCALES
sampling_ratio = cfg.MODEL.ROI_BOX_HEAD.POOLER_SAMPLING_RATIO
pooler = Pooler(
output_size=(resolution, resolution),
scales=scales,
sampling_ratio=sampling_ratio,
is_nhwc=cfg.NHWC
)
input_size = cfg.MODEL.BACKBONE.OUT_CHANNELS * resolution ** 2
representation_size = cfg.MODEL.ROI_BOX_HEAD.MLP_HEAD_DIM
use_gn = cfg.MODEL.ROI_BOX_HEAD.USE_GN
self.pooler = pooler
self.fc6 = make_fc(input_size, representation_size, use_gn)
self.fc7 = make_fc(representation_size, representation_size, use_gn)
def forward(self, x, proposals):
x = self.pooler(x, proposals)
x = torch.flatten(x, start_dim=1)
x = F.relu(self.fc6(x))
x = F.relu(self.fc7(x))
return x
@registry.ROI_BOX_FEATURE_EXTRACTORS.register("FPNXconv1fcFeatureExtractor")
class FPNXconv1fcFeatureExtractor(nn.Module):
"""
Heads for FPN for classification
"""
def __init__(self, cfg):
super(FPNXconv1fcFeatureExtractor, self).__init__()
resolution = cfg.MODEL.ROI_BOX_HEAD.POOLER_RESOLUTION
scales = cfg.MODEL.ROI_BOX_HEAD.POOLER_SCALES
sampling_ratio = cfg.MODEL.ROI_BOX_HEAD.POOLER_SAMPLING_RATIO
pooler = Pooler(
output_size=(resolution, resolution),
scales=scales,
sampling_ratio=sampling_ratio,
)
self.pooler = pooler
use_gn = cfg.MODEL.ROI_BOX_HEAD.USE_GN
in_channels = cfg.MODEL.BACKBONE.OUT_CHANNELS
conv_head_dim = cfg.MODEL.ROI_BOX_HEAD.CONV_HEAD_DIM
num_stacked_convs = cfg.MODEL.ROI_BOX_HEAD.NUM_STACKED_CONVS
dilation = cfg.MODEL.ROI_BOX_HEAD.DILATION
xconvs = []
for ix in range(num_stacked_convs):
xconvs.append(
nn.Conv2d(
in_channels,
conv_head_dim,
kernel_size=3,
stride=1,
padding=dilation,
dilation=dilation,
bias=False if use_gn else True
)
)
in_channels = conv_head_dim
if use_gn:
xconvs.append(group_norm(in_channels))
xconvs.append(nn.ReLU(inplace=True))
self.add_module("xconvs", nn.Sequential(*xconvs))
for modules in [self.xconvs,]:
for l in modules.modules():
if isinstance(l, nn.Conv2d):
torch.nn.init.normal_(l.weight, std=0.01)
if not use_gn:
torch.nn.init.constant_(l.bias, 0)
input_size = conv_head_dim * resolution ** 2
representation_size = cfg.MODEL.ROI_BOX_HEAD.MLP_HEAD_DIM
self.fc6 = make_fc(input_size, representation_size, use_gn=False)
def forward(self, x, proposals):
x = self.pooler(x, proposals)
x = self.xconvs(x)
x = x.view(x.size(0), -1)
x = F.relu(self.fc6(x))
return x
def make_roi_box_feature_extractor(cfg):
func = registry.ROI_BOX_FEATURE_EXTRACTORS[
cfg.MODEL.ROI_BOX_HEAD.FEATURE_EXTRACTOR
]
return func(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/box_head/roi_box_feature_extractors.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from torch import nn
from maskrcnn_benchmark.structures.bounding_box import BoxList
from .roi_mask_feature_extractors import make_roi_mask_feature_extractor
from .roi_mask_predictors import make_roi_mask_predictor
from .inference import make_roi_mask_post_processor
from .loss import make_roi_mask_loss_evaluator
def keep_only_positive_boxes(boxes):
"""
Given a set of BoxList containing the `labels` field,
return a set of BoxList for which `labels > 0`.
Arguments:
boxes (list of BoxList)
"""
assert isinstance(boxes, (list, tuple))
assert isinstance(boxes[0], BoxList)
assert boxes[0].has_field("labels")
positive_boxes = []
positive_inds = []
num_boxes = 0
for boxes_per_image in boxes:
labels = boxes_per_image.get_field("labels")
inds_mask = labels > 0
inds = inds_mask.nonzero().squeeze(1)
positive_boxes.append(boxes_per_image[inds])
positive_inds.append(inds_mask)
return positive_boxes, positive_inds
class ROIMaskHead(torch.nn.Module):
def __init__(self, cfg):
super(ROIMaskHead, self).__init__()
self.cfg = cfg.clone()
self.feature_extractor = make_roi_mask_feature_extractor(cfg)
self.predictor = make_roi_mask_predictor(cfg)
self.post_processor = make_roi_mask_post_processor(cfg)
self.loss_evaluator = make_roi_mask_loss_evaluator(cfg)
def forward(self, features, proposals, targets=None):
"""
Arguments:
features (list[Tensor]): feature-maps from possibly several levels
proposals (list[BoxList]): proposal boxes
targets (list[BoxList], optional): the ground-truth targets.
Returns:
x (Tensor): the result of the feature extractor
proposals (list[BoxList]): during training, the original proposals
are returned. During testing, the predicted boxlists are returned
with the `mask` field set
losses (dict[Tensor]): During training, returns the losses for the
head. During testing, returns an empty dict.
"""
if self.training:
# during training, only focus on positive boxes
all_proposals = proposals
proposals, positive_inds = keep_only_positive_boxes(proposals)
if self.training and self.cfg.MODEL.ROI_MASK_HEAD.SHARE_BOX_FEATURE_EXTRACTOR:
x = features
x = x[torch.cat(positive_inds, dim=0)]
else:
x = self.feature_extractor(features, proposals)
mask_logits = self.predictor(x)
if not self.training:
result = self.post_processor(mask_logits, proposals)
return x, result, {}
loss_mask = self.loss_evaluator(proposals, mask_logits, targets)
return x, all_proposals, dict(loss_mask=loss_mask)
def build_roi_mask_head(cfg):
return ROIMaskHead(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/mask_head/mask_head.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from torch import nn
from torch.nn import functional as F
from ..box_head.roi_box_feature_extractors import ResNet50Conv5ROIFeatureExtractor
from maskrcnn_benchmark.modeling.poolers import Pooler
from maskrcnn_benchmark.modeling.make_layers import make_conv3x3
class MaskRCNNFPNFeatureExtractor(nn.Module):
"""
Heads for FPN for classification
"""
def __init__(self, cfg):
"""
Arguments:
num_classes (int): number of output classes
input_size (int): number of channels of the input once it's flattened
representation_size (int): size of the intermediate representation
"""
super(MaskRCNNFPNFeatureExtractor, self).__init__()
resolution = cfg.MODEL.ROI_MASK_HEAD.POOLER_RESOLUTION
scales = cfg.MODEL.ROI_MASK_HEAD.POOLER_SCALES
sampling_ratio = cfg.MODEL.ROI_MASK_HEAD.POOLER_SAMPLING_RATIO
pooler = Pooler(
output_size=(resolution, resolution),
scales=scales,
sampling_ratio=sampling_ratio,
is_nhwc=cfg.NHWC
)
input_size = cfg.MODEL.BACKBONE.OUT_CHANNELS
self.pooler = pooler
self.nhwc = cfg.NHWC
use_gn = cfg.MODEL.ROI_MASK_HEAD.USE_GN
layers = cfg.MODEL.ROI_MASK_HEAD.CONV_LAYERS
dilation = cfg.MODEL.ROI_MASK_HEAD.DILATION
next_feature = input_size
self.blocks = []
for layer_idx, layer_features in enumerate(layers, 1):
layer_name = "mask_fcn{}".format(layer_idx)
module = make_conv3x3(next_feature, layer_features,
dilation=dilation, stride=1, use_gn=use_gn
)
self.add_module(layer_name, module)
next_feature = layer_features
self.blocks.append(layer_name)
def forward(self, x, proposals):
x = self.pooler(x, proposals)
for layer_name in self.blocks:
x = F.relu(getattr(self, layer_name)(x))
return x
_ROI_MASK_FEATURE_EXTRACTORS = {
"ResNet50Conv5ROIFeatureExtractor": ResNet50Conv5ROIFeatureExtractor,
"MaskRCNNFPNFeatureExtractor": MaskRCNNFPNFeatureExtractor,
}
def make_roi_mask_feature_extractor(cfg):
func = _ROI_MASK_FEATURE_EXTRACTORS[cfg.MODEL.ROI_MASK_HEAD.FEATURE_EXTRACTOR]
return func(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/mask_head/roi_mask_feature_extractors.py |
DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/mask_head/__init__.py |
|
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import torch
from torch.nn import functional as F
from maskrcnn_benchmark.layers import smooth_l1_loss
from maskrcnn_benchmark.modeling.matcher import Matcher
from maskrcnn_benchmark.structures.boxlist_ops import boxlist_iou
from maskrcnn_benchmark.modeling.utils import cat
from maskrcnn_benchmark import _C
import itertools
def project_masks_on_boxes(segmentation_masks, proposals, discretization_size):
"""
Given segmentation masks and the bounding boxes corresponding
to the location of the masks in the image, this function
crops and resizes the masks in the position defined by the
boxes. This prepares the masks for them to be fed to the
loss computation as the targets.
Arguments:
segmentation_masks: an instance of SegmentationMask
proposals: an instance of BoxList
"""
masks = []
M = discretization_size
device = proposals.bbox.device
proposals = proposals.convert("xyxy")
assert segmentation_masks.size == proposals.size, "{}, {}".format(
segmentation_masks, proposals
)
# CUDA implementation of RLE encoding needs to be fixed to support larger M
if proposals.bbox.is_cuda and M < 32:
polygons_list=[]
for poly_obj in segmentation_masks.polygons:
polygons_per_instance=[]
for poly in poly_obj.polygons:
polygons_per_instance.append(poly)
polygons_list.append(polygons_per_instance)
dense_coordinate_vec=torch.cat(list(itertools.chain(*polygons_list))).double()
if len(polygons_list) == 0:
return torch.empty(0, dtype=torch.float32, device=device)
if len(polygons_list)>0:
masks = _C.generate_mask_targets(dense_coordinate_vec, polygons_list,proposals.bbox,M)
return masks
else:
proposals = proposals.bbox.to(torch.device("cpu"))
for segmentation_mask, proposal in zip(segmentation_masks, proposals):
# crop the masks, resize them to the desired resolution and
# then convert them to the tensor representation,
# instead of the list representation that was used
cropped_mask = segmentation_mask.crop(proposal)
scaled_mask = cropped_mask.resize((M, M))
mask = scaled_mask.convert(mode="mask")
masks.append(mask)
if len(masks) == 0:
return torch.empty(0, dtype=torch.float32, device=device)
return torch.stack(masks, dim=0).to(device, dtype=torch.float32)
class MaskRCNNLossComputation(object):
def __init__(self, proposal_matcher, discretization_size):
"""
Arguments:
proposal_matcher (Matcher)
discretization_size (int)
"""
self.proposal_matcher = proposal_matcher
self.discretization_size = discretization_size
def match_targets_to_proposals(self, proposal, target):
match_quality_matrix = boxlist_iou(target, proposal)
matched_idxs = self.proposal_matcher(match_quality_matrix)
# Mask RCNN needs "labels" and "masks "fields for creating the targets
target = target.copy_with_fields(["labels", "masks"])
# get the targets corresponding GT for each proposal
# NB: need to clamp the indices because we can have a single
# GT in the image, and matched_idxs can be -2, which goes
# out of bounds
matched_targets = target[matched_idxs.clamp(min=0)]
matched_targets.add_field("matched_idxs", matched_idxs)
return matched_targets
def prepare_targets(self, proposals, targets):
labels = []
masks = []
for proposals_per_image, targets_per_image in zip(proposals, targets):
matched_targets = self.match_targets_to_proposals(
proposals_per_image, targets_per_image
)
matched_idxs = matched_targets.get_field("matched_idxs")
labels_per_image = matched_targets.get_field("labels")
labels_per_image = labels_per_image.to(dtype=torch.int64)
# this can probably be removed, but is left here for clarity
# and completeness
neg_inds = matched_idxs == Matcher.BELOW_LOW_THRESHOLD
labels_per_image[neg_inds] = 0
# mask scores are only computed on positive samples
positive_inds = torch.nonzero(labels_per_image > 0).squeeze(1)
segmentation_masks = matched_targets.get_field("masks")
segmentation_masks = segmentation_masks[positive_inds]
positive_proposals = proposals_per_image[positive_inds]
masks_per_image = project_masks_on_boxes(
segmentation_masks, positive_proposals, self.discretization_size
)
labels.append(labels_per_image)
masks.append(masks_per_image)
return labels, masks
def __call__(self, proposals, mask_logits, targets):
"""
Arguments:
proposals (list[BoxList])
mask_logits (Tensor)
targets (list[BoxList])
Return:
mask_loss (Tensor): scalar tensor containing the loss
"""
labels, mask_targets = self.prepare_targets(proposals, targets)
labels = cat(labels, dim=0)
mask_targets = cat(mask_targets, dim=0)
positive_inds = torch.nonzero(labels > 0).squeeze(1)
labels_pos = labels[positive_inds]
# torch.mean (in binary_cross_entropy_with_logits) doesn't
# accept empty tensors, so handle it separately
if mask_targets.numel() == 0:
return mask_logits.sum() * 0
mask_loss = F.binary_cross_entropy_with_logits(
mask_logits[positive_inds, labels_pos], mask_targets
)
return mask_loss
def make_roi_mask_loss_evaluator(cfg):
matcher = Matcher(
cfg.MODEL.ROI_HEADS.FG_IOU_THRESHOLD,
cfg.MODEL.ROI_HEADS.BG_IOU_THRESHOLD,
allow_low_quality_matches=False,
)
loss_evaluator = MaskRCNNLossComputation(
matcher, cfg.MODEL.ROI_MASK_HEAD.RESOLUTION
)
return loss_evaluator
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/mask_head/loss.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
import numpy as np
import torch
from torch import nn
import torch.nn.functional as F
from maskrcnn_benchmark.structures.bounding_box import BoxList
# TODO check if want to return a single BoxList or a composite
# object
class MaskPostProcessor(nn.Module):
"""
From the results of the CNN, post process the masks
by taking the mask corresponding to the class with max
probability (which are of fixed size and directly output
by the CNN) and return the masks in the mask field of the BoxList.
If a masker object is passed, it will additionally
project the masks in the image according to the locations in boxes,
"""
def __init__(self, masker=None):
super(MaskPostProcessor, self).__init__()
self.masker = masker
def forward(self, x, boxes):
"""
Arguments:
x (Tensor): the mask logits
boxes (list[BoxList]): bounding boxes that are used as
reference, one for ech image
Returns:
results (list[BoxList]): one BoxList for each image, containing
the extra field mask
"""
mask_prob = x.sigmoid()
# select masks coresponding to the predicted classes
num_masks = x.shape[0]
labels = [bbox.get_field("labels") for bbox in boxes]
labels = torch.cat(labels)
index = torch.arange(num_masks, device=labels.device)
mask_prob = mask_prob[index, labels][:, None]
boxes_per_image = [len(box) for box in boxes]
mask_prob = mask_prob.split(boxes_per_image, dim=0)
if self.masker:
mask_prob = self.masker(mask_prob, boxes)
results = []
for prob, box in zip(mask_prob, boxes):
bbox = BoxList(box.bbox, box.size, mode="xyxy")
for field in box.fields():
bbox.add_field(field, box.get_field(field))
bbox.add_field("mask", prob)
results.append(bbox)
return results
class MaskPostProcessorCOCOFormat(MaskPostProcessor):
"""
From the results of the CNN, post process the results
so that the masks are pasted in the image, and
additionally convert the results to COCO format.
"""
def forward(self, x, boxes):
import pycocotools.mask as mask_util
import numpy as np
results = super(MaskPostProcessorCOCOFormat, self).forward(x, boxes)
for result in results:
masks = result.get_field("mask").cpu()
rles = [
mask_util.encode(np.array(mask[0, :, :, np.newaxis], order="F"))[0]
for mask in masks
]
for rle in rles:
rle["counts"] = rle["counts"].decode("utf-8")
result.add_field("mask", rles)
return results
# the next two functions should be merged inside Masker
# but are kept here for the moment while we need them
# temporarily gor paste_mask_in_image
def expand_boxes(boxes, scale):
w_half = (boxes[:, 2] - boxes[:, 0]) * .5
h_half = (boxes[:, 3] - boxes[:, 1]) * .5
x_c = (boxes[:, 2] + boxes[:, 0]) * .5
y_c = (boxes[:, 3] + boxes[:, 1]) * .5
w_half *= scale
h_half *= scale
boxes_exp = torch.zeros_like(boxes)
boxes_exp[:, 0] = x_c - w_half
boxes_exp[:, 2] = x_c + w_half
boxes_exp[:, 1] = y_c - h_half
boxes_exp[:, 3] = y_c + h_half
return boxes_exp
def expand_masks(mask, padding):
N = mask.shape[0]
M = mask.shape[-1]
pad2 = 2 * padding
scale = float(M + pad2) / M
padded_mask = mask.new_zeros((N, 1, M + pad2, M + pad2))
padded_mask[:, :, padding:-padding, padding:-padding] = mask
return padded_mask, scale
def paste_mask_in_image(mask, box, im_h, im_w, thresh=0.5, padding=1):
# Need to work on the CPU, where fp16 isn't supported - cast to float to avoid this
mask = mask.float()
box = box.float()
padded_mask, scale = expand_masks(mask[None], padding=padding)
mask = padded_mask[0, 0]
box = expand_boxes(box[None], scale)[0]
box = box.to(dtype=torch.int32)
TO_REMOVE = 1
w = int(box[2] - box[0] + TO_REMOVE)
h = int(box[3] - box[1] + TO_REMOVE)
w = max(w, 1)
h = max(h, 1)
# Set shape to [batchxCxHxW]
mask = mask.expand((1, 1, -1, -1))
# Resize mask
mask = mask.to(torch.float32)
mask = F.interpolate(mask, size=(h, w), mode='bilinear', align_corners=False)
mask = mask[0][0]
if thresh >= 0:
mask = mask > thresh
else:
# for visualization and debugging, we also
# allow it to return an unmodified mask
mask = (mask * 255).to(torch.uint8)
im_mask = torch.zeros((im_h, im_w), dtype=torch.uint8)
x_0 = max(box[0], 0)
x_1 = min(box[2] + 1, im_w)
y_0 = max(box[1], 0)
y_1 = min(box[3] + 1, im_h)
im_mask[y_0:y_1, x_0:x_1] = mask[
(y_0 - box[1]) : (y_1 - box[1]), (x_0 - box[0]) : (x_1 - box[0])
]
return im_mask
class Masker(object):
"""
Projects a set of masks in an image on the locations
specified by the bounding boxes
"""
def __init__(self, threshold=0.5, padding=1):
self.threshold = threshold
self.padding = padding
def forward_single_image(self, masks, boxes):
boxes = boxes.convert("xyxy")
im_w, im_h = boxes.size
res = [
paste_mask_in_image(mask[0], box, im_h, im_w, self.threshold, self.padding)
for mask, box in zip(masks, boxes.bbox)
]
if len(res) > 0:
res = torch.stack(res, dim=0)[:, None]
else:
res = masks.new_empty((0, 1, masks.shape[-2], masks.shape[-1]))
return res
def __call__(self, masks, boxes):
if isinstance(boxes, BoxList):
boxes = [boxes]
# Make some sanity check
assert len(boxes) == len(masks), "Masks and boxes should have the same length."
# TODO: Is this JIT compatible?
# If not we should make it compatible.
results = []
for mask, box in zip(masks, boxes):
assert mask.shape[0] == len(box), "Number of objects should be the same."
result = self.forward_single_image(mask, box)
results.append(result)
return results
def make_roi_mask_post_processor(cfg):
if cfg.MODEL.ROI_MASK_HEAD.POSTPROCESS_MASKS:
mask_threshold = cfg.MODEL.ROI_MASK_HEAD.POSTPROCESS_MASKS_THRESHOLD
masker = Masker(threshold=mask_threshold, padding=1)
else:
masker = None
mask_post_processor = MaskPostProcessor(masker)
return mask_post_processor
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/mask_head/inference.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
from torch import nn
from torch.nn import functional as F
from maskrcnn_benchmark.layers import Conv2d
from maskrcnn_benchmark.layers import ConvTranspose2d
class MaskRCNNC4Predictor(nn.Module):
def __init__(self, cfg):
super(MaskRCNNC4Predictor, self).__init__()
num_classes = cfg.MODEL.ROI_BOX_HEAD.NUM_CLASSES
dim_reduced = cfg.MODEL.ROI_MASK_HEAD.CONV_LAYERS[-1]
if cfg.MODEL.ROI_HEADS.USE_FPN:
num_inputs = dim_reduced
else:
stage_index = 4
stage2_relative_factor = 2 ** (stage_index - 1)
res2_out_channels = cfg.MODEL.RESNETS.RES2_OUT_CHANNELS
num_inputs = res2_out_channels * stage2_relative_factor
self.conv5_mask = ConvTranspose2d(num_inputs, dim_reduced, 2, 2, 0)
self.mask_fcn_logits = Conv2d(dim_reduced, num_classes, 1, 1, 0)
for name, param in self.named_parameters():
if "bias" in name:
nn.init.constant_(param, 0)
elif "weight" in name:
# Caffe2 implementation uses MSRAFill, which in fact
# corresponds to kaiming_normal_ in PyTorch
nn.init.kaiming_normal_(param, mode="fan_out", nonlinearity="relu")
def forward(self, x):
x = F.relu(self.conv5_mask(x))
return self.mask_fcn_logits(x)
_ROI_MASK_PREDICTOR = {"MaskRCNNC4Predictor": MaskRCNNC4Predictor}
def make_roi_mask_predictor(cfg):
func = _ROI_MASK_PREDICTOR[cfg.MODEL.ROI_MASK_HEAD.PREDICTOR]
return func(cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/roi_heads/mask_head/roi_mask_predictors.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import torch
import torch.nn.functional as F
from torch import nn
class FPN(nn.Module):
"""
Module that adds FPN on top of a list of feature maps.
The feature maps are currently supposed to be in increasing depth
order, and must be consecutive
"""
def __init__(
self, in_channels_list, out_channels, conv_block, top_blocks=None, nhwc=False
):
"""
Arguments:
in_channels_list (list[int]): number of channels for each feature map that
will be fed
out_channels (int): number of channels of the FPN representation
top_blocks (nn.Module or None): if provided, an extra operation will
be performed on the output of the last (smallest resolution)
FPN output, and the result will extend the result list
nhwc (bool): specify is FPN is running at nhwc mode
"""
super(FPN, self).__init__()
self.inner_blocks = []
self.layer_blocks = []
for idx, in_channels in enumerate(in_channels_list, 1):
inner_block = "fpn_inner{}".format(idx)
layer_block = "fpn_layer{}".format(idx)
inner_block_module = conv_block(in_channels, out_channels, 1)
layer_block_module = conv_block(out_channels, out_channels, 3, 1)
self.add_module(inner_block, inner_block_module)
self.add_module(layer_block, layer_block_module)
self.inner_blocks.append(inner_block)
self.layer_blocks.append(layer_block)
self.top_blocks = top_blocks
def forward(self, x):
"""
Arguments:
x (list[Tensor]): feature maps for each feature level.
Returns:
results (tuple[Tensor]): feature maps after FPN layers.
They are ordered from highest resolution first.
"""
last_inner = getattr(self, self.inner_blocks[-1])(x[-1])
results = []
results.append(getattr(self, self.layer_blocks[-1])(last_inner))
for feature, inner_block, layer_block in zip(
x[:-1][::-1], self.inner_blocks[:-1][::-1], self.layer_blocks[:-1][::-1]
):
inner_top_down = F.interpolate(last_inner, scale_factor=2, mode="nearest")
inner_lateral = getattr(self, inner_block)(feature)
# TODO use size instead of scale to make it robust to different sizes
# inner_top_down = F.upsample(last_inner, size=inner_lateral.shape[-2:],
# mode='bilinear', align_corners=False)
last_inner = inner_lateral + inner_top_down
results.insert(0, getattr(self, layer_block)(last_inner))
if self.top_blocks is not None:
last_results = self.top_blocks(results[-1])
results.extend(last_results)
return tuple(results)
class LastLevelMaxPool(nn.Module):
def forward(self, x):
return [F.max_pool2d(x, 1, 2, 0)]
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/backbone/fpn.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
from collections import OrderedDict
from torch import nn
from maskrcnn_benchmark.modeling import registry
from maskrcnn_benchmark.modeling.make_layers import conv_with_kaiming_uniform
from . import fpn as fpn_module
from . import resnet
@registry.BACKBONES.register("R-50-C4")
@registry.BACKBONES.register("R-50-C5")
@registry.BACKBONES.register("R-101-C4")
@registry.BACKBONES.register("R-101-C5")
def build_resnet_backbone(cfg):
body = resnet.ResNet(cfg)
model = nn.Sequential(OrderedDict([("body", body)]))
return model
@registry.BACKBONES.register("R-50-FPN")
@registry.BACKBONES.register("R-101-FPN")
def build_resnet_fpn_backbone(cfg):
body = resnet.ResNet(cfg)
in_channels_stage2 = cfg.MODEL.RESNETS.RES2_OUT_CHANNELS
out_channels = cfg.MODEL.BACKBONE.OUT_CHANNELS
fpn = fpn_module.FPN(
in_channels_list=[
in_channels_stage2,
in_channels_stage2 * 2,
in_channels_stage2 * 4,
in_channels_stage2 * 8,
],
out_channels=out_channels,
conv_block=conv_with_kaiming_uniform(
cfg.MODEL.FPN.USE_GN, cfg.MODEL.FPN.USE_RELU
),
top_blocks=fpn_module.LastLevelMaxPool(),
nhwc=cfg.NHWC,
)
model = nn.Sequential(OrderedDict([("body", body), ("fpn", fpn)]))
return model
def build_backbone(cfg):
assert cfg.MODEL.BACKBONE.CONV_BODY in registry.BACKBONES, \
"cfg.MODEL.BACKBONE.CONV_BODY: {} are not registered in registry".format(
cfg.MODEL.BACKBONE.CONV_BODY
)
return registry.BACKBONES[cfg.MODEL.BACKBONE.CONV_BODY](cfg)
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/backbone/backbone.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from .backbone import build_backbone
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/backbone/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
"""
Variant of the resnet module that takes cfg as an argument.
Example usage. Strings may be specified in the config file.
model = ResNet(
"StemWithFixedBatchNorm",
"BottleneckWithFixedBatchNorm",
"ResNet50StagesTo4",
)
OR:
model = ResNet(
"StemWithGN",
"BottleneckWithGN",
"ResNet50StagesTo4",
)
Custom implementations may be written in user code and hooked in via the
`register_*` functions.
"""
from collections import namedtuple
import torch
import torch.nn.functional as F
from torch import nn
from maskrcnn_benchmark.layers import FrozenBatchNorm2d
from maskrcnn_benchmark.layers import Conv2d
from maskrcnn_benchmark.modeling.make_layers import group_norm
from maskrcnn_benchmark.utils.registry import Registry
# ResNet stage specification
StageSpec = namedtuple(
"StageSpec",
[
"index", # Index of the stage, eg 1, 2, ..,. 5
"block_count", # Numer of residual blocks in the stage
"return_features", # True => return the last feature map from this stage
],
)
# -----------------------------------------------------------------------------
# Standard ResNet models
# -----------------------------------------------------------------------------
# ResNet-50 (including all stages)
ResNet50StagesTo5 = tuple(
StageSpec(index=i, block_count=c, return_features=r)
for (i, c, r) in ((1, 3, False), (2, 4, False), (3, 6, False), (4, 3, True))
)
# ResNet-50 up to stage 4 (excludes stage 5)
ResNet50StagesTo4 = tuple(
StageSpec(index=i, block_count=c, return_features=r)
for (i, c, r) in ((1, 3, False), (2, 4, False), (3, 6, True))
)
# ResNet-101 (including all stages)
ResNet101StagesTo5 = tuple(
StageSpec(index=i, block_count=c, return_features=r)
for (i, c, r) in ((1, 3, False), (2, 4, False), (3, 23, False), (4, 3, True))
)
# ResNet-101 up to stage 4 (excludes stage 5)
ResNet101StagesTo4 = tuple(
StageSpec(index=i, block_count=c, return_features=r)
for (i, c, r) in ((1, 3, False), (2, 4, False), (3, 23, True))
)
# ResNet-50-FPN (including all stages)
ResNet50FPNStagesTo5 = tuple(
StageSpec(index=i, block_count=c, return_features=r)
for (i, c, r) in ((1, 3, True), (2, 4, True), (3, 6, True), (4, 3, True))
)
# ResNet-101-FPN (including all stages)
ResNet101FPNStagesTo5 = tuple(
StageSpec(index=i, block_count=c, return_features=r)
for (i, c, r) in ((1, 3, True), (2, 4, True), (3, 23, True), (4, 3, True))
)
class ResNet(nn.Module):
def __init__(self, cfg):
super(ResNet, self).__init__()
# If we want to use the cfg in forward(), then we should make a copy
# of it and store it for later use:
# self.cfg = cfg.clone()
# Translate string names to implementations
stem_module = _STEM_MODULES[cfg.MODEL.RESNETS.STEM_FUNC]
stage_specs = _STAGE_SPECS[cfg.MODEL.BACKBONE.CONV_BODY]
transformation_module = _TRANSFORMATION_MODULES[cfg.MODEL.RESNETS.TRANS_FUNC]
# Construct the stem module
self.stem = stem_module(cfg)
# Constuct the specified ResNet stages
num_groups = cfg.MODEL.RESNETS.NUM_GROUPS
width_per_group = cfg.MODEL.RESNETS.WIDTH_PER_GROUP
in_channels = cfg.MODEL.RESNETS.STEM_OUT_CHANNELS
stage2_bottleneck_channels = num_groups * width_per_group
stage2_out_channels = cfg.MODEL.RESNETS.RES2_OUT_CHANNELS
self.stages = []
self.return_features = {}
for stage_spec in stage_specs:
name = "layer" + str(stage_spec.index)
stage2_relative_factor = 2 ** (stage_spec.index - 1)
bottleneck_channels = stage2_bottleneck_channels * stage2_relative_factor
out_channels = stage2_out_channels * stage2_relative_factor
module = _make_stage(
transformation_module,
in_channels,
bottleneck_channels,
out_channels,
stage_spec.block_count,
num_groups,
cfg.MODEL.RESNETS.STRIDE_IN_1X1,
first_stride=int(stage_spec.index > 1) + 1,
)
in_channels = out_channels
self.add_module(name, module)
self.stages.append(name)
self.return_features[name] = stage_spec.return_features
# Optionally freeze (requires_grad=False) parts of the backbone
self._freeze_backbone(cfg.MODEL.BACKBONE.FREEZE_CONV_BODY_AT)
def _freeze_backbone(self, freeze_at):
if freeze_at < 0:
return
for stage_index in range(freeze_at):
if stage_index == 0:
m = self.stem # stage 0 is the stem
else:
m = getattr(self, "layer" + str(stage_index))
for p in m.parameters():
p.requires_grad = False
def forward(self, x):
outputs = []
x = self.stem(x)
for stage_name in self.stages:
x = getattr(self, stage_name)(x)
if self.return_features[stage_name]:
outputs.append(x)
return outputs
class ResNetHead(nn.Module):
def __init__(
self,
block_module,
stages,
num_groups=1,
width_per_group=64,
stride_in_1x1=True,
stride_init=None,
res2_out_channels=256,
dilation=1
):
super(ResNetHead, self).__init__()
stage2_relative_factor = 2 ** (stages[0].index - 1)
stage2_bottleneck_channels = num_groups * width_per_group
out_channels = res2_out_channels * stage2_relative_factor
in_channels = out_channels // 2
bottleneck_channels = stage2_bottleneck_channels * stage2_relative_factor
block_module = _TRANSFORMATION_MODULES[block_module]
self.stages = []
stride = stride_init
for stage in stages:
name = "layer" + str(stage.index)
if not stride:
stride = int(stage.index > 1) + 1
module = _make_stage(
block_module,
in_channels,
bottleneck_channels,
out_channels,
stage.block_count,
num_groups,
stride_in_1x1,
first_stride=stride,
dilation=dilation
)
stride = None
self.add_module(name, module)
self.stages.append(name)
def forward(self, x):
for stage in self.stages:
x = getattr(self, stage)(x)
return x
def _make_stage(
transformation_module,
in_channels,
bottleneck_channels,
out_channels,
block_count,
num_groups,
stride_in_1x1,
first_stride,
dilation=1
):
blocks = []
stride = first_stride
for _ in range(block_count):
blocks.append(
transformation_module(
in_channels,
bottleneck_channels,
out_channels,
num_groups,
stride_in_1x1,
stride,
dilation=dilation
)
)
stride = 1
in_channels = out_channels
return nn.Sequential(*blocks)
class Bottleneck(nn.Module):
def __init__(
self,
in_channels,
bottleneck_channels,
out_channels,
num_groups,
stride_in_1x1,
stride,
dilation,
norm_func
):
super(Bottleneck, self).__init__()
self.downsample = None
if in_channels != out_channels:
down_stride = stride if dilation == 1 else 1
self.downsample = nn.Sequential(
Conv2d(
in_channels, out_channels,
kernel_size=1, stride=down_stride, bias=False
),
norm_func(out_channels),
)
for modules in [self.downsample,]:
for l in modules.modules():
if isinstance(l, Conv2d):
nn.init.kaiming_uniform_(l.weight, a=1)
if dilation > 1:
stride = 1 # reset to be 1
# The original MSRA ResNet models have stride in the first 1x1 conv
# The subsequent fb.torch.resnet and Caffe2 ResNe[X]t implementations have
# stride in the 3x3 conv
stride_1x1, stride_3x3 = (stride, 1) if stride_in_1x1 else (1, stride)
self.conv1 = Conv2d(
in_channels,
bottleneck_channels,
kernel_size=1,
stride=stride_1x1,
bias=False,
)
self.bn1 = norm_func(bottleneck_channels)
# TODO: specify init for the above
self.conv2 = Conv2d(
bottleneck_channels,
bottleneck_channels,
kernel_size=3,
stride=stride_3x3,
padding=dilation,
bias=False,
groups=num_groups,
dilation=dilation
)
self.bn2 = norm_func(bottleneck_channels)
self.conv3 = Conv2d(
bottleneck_channels, out_channels, kernel_size=1, bias=False
)
self.bn3 = norm_func(out_channels)
for l in [self.conv1, self.conv2, self.conv3,]:
nn.init.kaiming_uniform_(l.weight, a=1)
def forward(self, x):
identity = x
out = self.conv1(x)
out = self.bn1(out)
out = F.relu_(out)
out = self.conv2(out)
out = self.bn2(out)
out = F.relu_(out)
out0 = self.conv3(out)
out = self.bn3(out0)
if self.downsample is not None:
identity = self.downsample(x)
out += identity
out = F.relu_(out)
return out
class BaseStem(nn.Module):
def __init__(self, cfg, norm_func):
super(BaseStem, self).__init__()
out_channels = cfg.MODEL.RESNETS.STEM_OUT_CHANNELS
self.conv1 = Conv2d(
3, out_channels, kernel_size=7, stride=2, padding=3, bias=False
)
self.bn1 = norm_func(out_channels)
for l in [self.conv1,]:
nn.init.kaiming_uniform_(l.weight, a=1)
def forward(self, x):
x = self.conv1(x.float())
x = self.bn1(x)
x = F.relu_(x)
x = F.max_pool2d(x, kernel_size=3, stride=2, padding=1)
return x
class BottleneckWithFixedBatchNorm(Bottleneck):
def __init__(
self,
in_channels,
bottleneck_channels,
out_channels,
num_groups=1,
stride_in_1x1=True,
stride=1,
dilation=1
):
super(BottleneckWithFixedBatchNorm, self).__init__(
in_channels=in_channels,
bottleneck_channels=bottleneck_channels,
out_channels=out_channels,
num_groups=num_groups,
stride_in_1x1=stride_in_1x1,
stride=stride,
dilation=dilation,
norm_func=FrozenBatchNorm2d
)
class StemWithFixedBatchNorm(BaseStem):
def __init__(self, cfg):
super(StemWithFixedBatchNorm, self).__init__(
cfg, norm_func=FrozenBatchNorm2d
)
class BottleneckWithGN(Bottleneck):
def __init__(
self,
in_channels,
bottleneck_channels,
out_channels,
num_groups=1,
stride_in_1x1=True,
stride=1,
dilation=1
):
super(BottleneckWithGN, self).__init__(
in_channels=in_channels,
bottleneck_channels=bottleneck_channels,
out_channels=out_channels,
num_groups=num_groups,
stride_in_1x1=stride_in_1x1,
stride=stride,
dilation=dilation,
norm_func=group_norm
)
class StemWithGN(BaseStem):
def __init__(self, cfg):
super(StemWithGN, self).__init__(cfg, norm_func=group_norm)
_TRANSFORMATION_MODULES = Registry({
"BottleneckWithFixedBatchNorm": BottleneckWithFixedBatchNorm,
"BottleneckWithGN": BottleneckWithGN,
})
_STEM_MODULES = Registry({
"StemWithFixedBatchNorm": StemWithFixedBatchNorm,
"StemWithGN": StemWithGN,
})
_STAGE_SPECS = Registry({
"R-50-C4": ResNet50StagesTo4,
"R-50-C5": ResNet50StagesTo5,
"R-101-C4": ResNet101StagesTo4,
"R-101-C5": ResNet101StagesTo5,
"R-50-FPN": ResNet50FPNStagesTo5,
"R-101-FPN": ResNet101FPNStagesTo5,
})
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/modeling/backbone/resnet.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved..
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
import bisect
import copy
import logging
import torch.utils.data
from maskrcnn_benchmark.data.datasets.coco import HybridDataLoader
from maskrcnn_benchmark.utils.comm import get_world_size
from maskrcnn_benchmark.utils.imports import import_file
from . import datasets as D
from . import samplers
from .collate_batch import BatchCollator
from .transforms import build_transforms
def build_dataset(dataset_list, transforms, dataset_catalog, is_train=True):
"""
Arguments:
dataset_list (list[str]): Contains the names of the datasets, i.e.,
coco_2014_trian, coco_2014_val, etc
transforms (callable): transforms to apply to each (image, target) sample
dataset_catalog (DatasetCatalog): contains the information on how to
construct a dataset.
is_train (bool): whether to setup the dataset for training or testing
"""
if not isinstance(dataset_list, (list, tuple)):
raise RuntimeError(
"dataset_list should be a list of strings, got {}".format(dataset_list)
)
datasets = []
total_datasets_size = 0
for dataset_name in dataset_list:
data = dataset_catalog.get(dataset_name)
factory = getattr(D, data["factory"])
args = data["args"]
# for COCODataset, we want to remove images without annotations
# during training
if data["factory"] == "COCODataset":
args["remove_images_without_annotations"] = is_train
if data["factory"] == "PascalVOCDataset":
args["use_difficult"] = not is_train
args["transforms"] = transforms
# make dataset from factory
dataset = factory(**args)
total_datasets_size += len(dataset)
datasets.append(dataset)
# for testing, return a list of datasets
if not is_train:
return datasets, total_datasets_size
# for training, concatenate all datasets into a single one
dataset = datasets[0]
if len(datasets) > 1:
dataset = D.ConcatDataset(datasets)
return [dataset], total_datasets_size
def make_data_sampler(dataset, shuffle, distributed):
if distributed:
return samplers.DistributedSampler(dataset, shuffle=shuffle)
if shuffle:
sampler = torch.utils.data.sampler.RandomSampler(dataset)
else:
sampler = torch.utils.data.sampler.SequentialSampler(dataset)
return sampler
def _quantize(x, bins):
bins = copy.copy(bins)
bins = sorted(bins)
quantized = list(map(lambda y: bisect.bisect_right(bins, y), x))
return quantized
def _compute_aspect_ratios(dataset):
aspect_ratios = []
for i in range(len(dataset)):
img_info = dataset.get_img_info(i)
aspect_ratio = float(img_info["height"]) / float(img_info["width"])
aspect_ratios.append(aspect_ratio)
return aspect_ratios
def make_batch_data_sampler(
dataset, sampler, aspect_grouping, images_per_batch, num_iters=None, start_iter=0
):
if aspect_grouping:
if not isinstance(aspect_grouping, (list, tuple)):
aspect_grouping = [aspect_grouping]
aspect_ratios = _compute_aspect_ratios(dataset)
group_ids = _quantize(aspect_ratios, aspect_grouping)
batch_sampler = samplers.GroupedBatchSampler(
sampler, group_ids, images_per_batch, drop_uneven=False
)
else:
batch_sampler = torch.utils.data.sampler.BatchSampler(
sampler, images_per_batch, drop_last=False
)
if num_iters is not None:
batch_sampler = samplers.IterationBasedBatchSampler(
batch_sampler, num_iters, start_iter
)
return batch_sampler
def make_data_loader(cfg, is_train=True, is_distributed=False, start_iter=0):
num_gpus = get_world_size()
if is_train:
images_per_batch = cfg.SOLVER.IMS_PER_BATCH
assert (
images_per_batch % num_gpus == 0
), "SOLVER.IMS_PER_BATCH ({}) must be divisible by the number "
"of GPUs ({}) used.".format(images_per_batch, num_gpus)
images_per_gpu = images_per_batch // num_gpus
shuffle = True
num_iters = cfg.SOLVER.MAX_ITER
else:
images_per_batch = cfg.TEST.IMS_PER_BATCH
assert (
images_per_batch % num_gpus == 0
), "TEST.IMS_PER_BATCH ({}) must be divisible by the number "
"of GPUs ({}) used.".format(images_per_batch, num_gpus)
images_per_gpu = images_per_batch // num_gpus
shuffle = False if not is_distributed else True
num_iters = None
start_iter = 0
if images_per_gpu > 1:
logger = logging.getLogger(__name__)
logger.warning(
"When using more than one image per GPU you may encounter "
"an out-of-memory (OOM) error if your GPU does not have "
"sufficient memory. If this happens, you can reduce "
"SOLVER.IMS_PER_BATCH (for training) or "
"TEST.IMS_PER_BATCH (for inference). For training, you must "
"also adjust the learning rate and schedule length according "
"to the linear scaling rule. See for example: "
"https://github.com/facebookresearch/Detectron/blob/master/configs/getting_started/tutorial_1gpu_e2e_faster_rcnn_R-50-FPN.yaml#L14"
)
# group images which have similar aspect ratio. In this case, we only
# group in two cases: those with width / height > 1, and the other way around,
# but the code supports more general grouping strategy
aspect_grouping = [1] if cfg.DATALOADER.ASPECT_RATIO_GROUPING else []
hybrid_dataloader = cfg.DATALOADER.HYBRID
paths_catalog = import_file(
"maskrcnn_benchmark.config.paths_catalog", cfg.PATHS_CATALOG, True
)
DatasetCatalog = paths_catalog.DatasetCatalog
dataset_list = cfg.DATASETS.TRAIN if is_train else cfg.DATASETS.TEST
transforms = build_transforms(cfg, is_train)
if hybrid_dataloader:
datasets, epoch_size = build_dataset(dataset_list, None, DatasetCatalog, is_train)
else:
datasets, epoch_size = build_dataset(dataset_list, transforms, DatasetCatalog, is_train)
data_loaders = []
for dataset in datasets:
sampler = make_data_sampler(dataset, shuffle, is_distributed)
batch_sampler = make_batch_data_sampler(
dataset, sampler, aspect_grouping, images_per_gpu, num_iters, start_iter
)
collator = BatchCollator(cfg.DATALOADER.SIZE_DIVISIBILITY)
if hybrid_dataloader:
data_loader = HybridDataLoader(cfg, is_train,
images_per_gpu, batch_sampler,
dataset, collator,
transforms,
cfg.DATALOADER.SIZE_DIVISIBILITY)
else:
num_workers = cfg.DATALOADER.NUM_WORKERS
data_loader = torch.utils.data.DataLoader(
dataset,
num_workers=num_workers,
batch_sampler=batch_sampler,
collate_fn=collator)
data_loaders.append(data_loader)
if is_train:
# during training, a single (possibly concatenated) data_loader is returned
assert len(data_loaders) == 1
iterations_per_epoch = epoch_size // images_per_batch
return data_loaders[0], iterations_per_epoch
return data_loaders
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/data/build.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from .build import make_data_loader
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/data/__init__.py |
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from maskrcnn_benchmark.structures.image_list import to_image_list
class BatchCollator(object):
"""
From a list of samples from the dataset,
returns the batched images and targets.
This should be passed to the DataLoader
"""
def __init__(self, size_divisible=0):
self.size_divisible = size_divisible
def __call__(self, batch):
transposed_batch = list(zip(*batch))
images = to_image_list(transposed_batch[0], self.size_divisible)
targets = transposed_batch[1]
img_ids = transposed_batch[2]
return images, targets, img_ids
| DeepLearningExamples-master | PyTorch/Segmentation/MaskRCNN/pytorch/maskrcnn_benchmark/data/collate_batch.py |
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