Update app.py

app.py

@@ -1,6 +1,6 @@
 #This code is from: https://huggingface.co/spaces/diffusers/controlnet-3d-pose
 import gradio as gr
-from PIL import Image, ImageFilter
+from PIL import Image, ImageFilter, ImageOps
 from io import BytesIO
 import numpy as np 
 import base64
@@ -55,6 +55,7 @@ def generate_images(canvas,output_type):
         'RGB').resize((512, 512))
     input_img = input_img.filter(ImageFilter.GaussianBlur(radius=2))
     input_img = get_canny_filter(input_img) if output_type == "Canny" else input_img
+    input_img = ImageOps.invert(input_img)    
     return input_img
 def placeholder_fn(axis):
     pass