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README.md

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+---
+license: apache-2.0
+---
+
+# PP-OCRv4_server_seal_det
+
+## Introduction
+The server-side seal text detection model of PP-OCRv4 boasts higher accuracy and is suitable for deployment on better-equipped servers. The key accuracy metrics are as follow:
+
+
+| Model| Hmean (%) | 
+|  --- | --- | 
+|PP-OCRv4_server_seal_det |  98.21 | 
+
+
+**Note**:  The metric is based on PaddleX Custom Test Dataset, Containing 500 Images of Circular Stamps.
+
+## Quick Start
+
+### Installation
+
+1. PaddlePaddle
+
+Please refer to the following commands to install PaddlePaddle using pip:
+
+```bash
+# for CUDA11.8
+python -m pip install paddlepaddle-gpu==3.0.0 -i https://www.paddlepaddle.org.cn/packages/stable/cu118/
+
+# for CUDA12.6
+python -m pip install paddlepaddle-gpu==3.0.0 -i https://www.paddlepaddle.org.cn/packages/stable/cu126/
+
+# for CPU
+python -m pip install paddlepaddle==3.0.0 -i https://www.paddlepaddle.org.cn/packages/stable/cpu/
+```
+
+For details about PaddlePaddle installation, please refer to the [PaddlePaddle official website](https://www.paddlepaddle.org.cn/en/install/quick).
+
+2. PaddleOCR
+
+Install the latest version of the PaddleOCR inference package from PyPI:
+
+```bash
+python -m pip install paddleocr
+```
+
+### Model Usage
+
+You can quickly experience the functionality with a single command:
+
+```bash
+paddleocr seal_text_detection \
+    --model_name PP-OCRv4_server_seal_det \
+    -i https://cdn-uploads.huggingface.co/production/uploads/63d7b8ee07cd1aa3c49a2026/k02u35x60XZmaL9hzeQ0T.png
+```
+
+You can also integrate the model inference of the seal text detection module into your project. Before running the following code, please download the sample image to your local machine.
+
+```python
+from paddleocr import SealTextDetection
+model = SealTextDetection(model_name="PP-OCRv4_server_seal_det")
+output = model.predict(input="k02u35x60XZmaL9hzeQ0T.png", batch_size=1)
+for res in output:
+    res.print()
+    res.save_to_img(save_path="./output/")
+    res.save_to_json(save_path="./output/res.json")
+```
+
+After running, the obtained result is as follows:
+
+```json
+{'res': {'input_path': 'k02u35x60XZmaL9hzeQ0T.png', 'page_index': None, 'dt_polys': [array([[165, 469],
+       ...,
+       [161, 466]]), array([[444, 444],
+       ...,
+       [441, 443]]), array([[466, 346],
+       ...,
+       [462, 345]]), array([[324,  38],
+       ...,
+       [320,  37]])], 'dt_scores': [0.989991263358307, 0.9934761181445114, 0.9916670610495292, 0.9857514344934838]}}
+```
+
+The visualized image is as follows:
+
+![image/jpeg](https://cdn-uploads.huggingface.co/production/uploads/63d7b8ee07cd1aa3c49a2026/NJmpNFddVH2gCrO9FWpo_.png)
+
+For details about usage command and descriptions of parameters, please refer to the [Document](https://paddlepaddle.github.io/PaddleOCR/latest/en/version3.x/module_usage/seal_text_detection.html#iii-quick-start).
+
+### Pipeline Usage
+
+The ability of a single model is limited. But the pipeline consists of several models can provide more capacity to resolve difficult problems in real-world scenarios.
+
+#### Seal Text Recognition Pipeline
+
+Seal text recognition is a technology that automatically extracts and recognizes the content of seals from documents or images. The recognition of seal text is part of document processing and has many applications in various scenarios, such as contract comparison, warehouse entry and exit review, and invoice reimbursement review.And there are 5 modules in the pipeline: 
+
+* Seal Text Detection Module
+* Text Recognition Module
+* Layout Detection Module (Optional)
+* Document Image Orientation Classification Module (Optional)
+* Text Image Unwarping Module (Optional)
+
+Run a single command to quickly experience the OCR pipeline:
+
+```bash
+paddleocr seal_recognition -i https://cdn-uploads.huggingface.co/production/uploads/63d7b8ee07cd1aa3c49a2026/k02u35x60XZmaL9hzeQ0T.png \
+    --seal_text_detection_model_name PP-OCRv4_server_seal_det \
+    --use_doc_orientation_classify False \
+    --use_doc_unwarping False \
+    --save_path ./output \
+    --device gpu:0 
+```
+
+Results are printed to the terminal:
+
+```json
+{'res': {'input_path': '/root/.paddlex/predict_input/k02u35x60XZmaL9hzeQ0T.png', 'model_settings': {'use_doc_preprocessor': True, 'use_layout_detection': True}, 'doc_preprocessor_res': {'input_path': None, 'page_index': None, 'model_settings': {'use_doc_orientation_classify': False, 'use_doc_unwarping': False}, 'angle': -1}, 'layout_det_res': {'input_path': None, 'page_index': None, 'boxes': [{'cls_id': 16, 'label': 'seal', 'score': 0.9755404591560364, 'coordinate': [6.19458, 0.17910767, 634.38385, 628.8424]}]}, 'seal_res_list': [{'input_path': None, 'page_index': None, 'model_settings': {'use_doc_preprocessor': False, 'use_textline_orientation': False}, 'dt_polys': [array([[320,  38],
+       ...,
+       [315,  38]]), array([[461, 347],
+       ...,
+       [456, 346]]), array([[439, 445],
+       ...,
+       [434, 444]]), array([[158, 468],
+       ...,
+       [154, 466]])], 'text_det_params': {'limit_side_len': 736, 'limit_type': 'min', 'thresh': 0.2, 'max_side_limit': 4000, 'box_thresh': 0.6, 'unclip_ratio': 0.5}, 'text_type': 'seal', 'textline_orientation_angles': array([-1, ..., -1]), 'text_rec_score_thresh': 0, 'rec_texts': ['天津君和缘商贸有限公司', '发票专用章', '吗繁物', '5263647368706'], 'rec_scores': array([0.99340463, ..., 0.9916274 ]), 'rec_polys': [array([[320,  38],
+       ...,
+       [315,  38]]), array([[461, 347],
+       ...,
+       [456, 346]]), array([[439, 445],
+       ...,
+       [434, 444]]), array([[158, 468],
+       ...,
+       [154, 466]])], 'rec_boxes': array([], dtype=float64)}]}}
+```
+
+If save_path is specified, the visualization results will be saved under `save_path`. The visualization output is shown below:
+
+![image/jpeg](https://cdn-uploads.huggingface.co/production/uploads/63d7b8ee07cd1aa3c49a2026/VVhOMXvWrlrIhTsq97as4.png)
+
+The command-line method is for quick experience. For project integration, also only a few codes are needed as well:
+
+```python
+from paddleocr import PaddleOCR  
+
+ocr = PaddleOCR(
+    seal_text_detection_model_name="PP-OCRv4_server_seal_det",
+    use_doc_orientation_classify=False, # Use use_doc_orientation_classify to enable/disable document orientation classification model
+    use_doc_unwarping=False, # Use use_doc_unwarping to enable/disable document unwarping module
+    device="gpu:0", # Use device to specify GPU for model inference
+)
+result = ocr.predict("https://cdn-uploads.huggingface.co/production/uploads/63d7b8ee07cd1aa3c49a2026/k02u35x60XZmaL9hzeQ0T.png")  
+for res in result:  
+    res.print()  
+    res.save_to_img("output")  
+    res.save_to_json("output")
+```
+
+The default model used in pipeline is `PP-OCRv4_server_seal_det`. For details about usage command and descriptions of parameters, please refer to the [Document](https://paddlepaddle.github.io/PaddleOCR/latest/en/version3.x/pipeline_usage/seal_recognition.html#2-quick-start).
+
+## Links
+
+[PaddleOCR Repo](https://github.com/paddlepaddle/paddleocr)
+
+[PaddleOCR Documentation](https://paddlepaddle.github.io/PaddleOCR/latest/en/index.html)