Update

app.py

@@ -167,11 +167,15 @@ class webui:
         lineart = process_XDoG(image_path).convert('L')
         replace_color_image = process_image(rgb_image, lineart).convert('RGBA')
         if alpha:
-            replace_color_image.putalpha(alpha)
+            alpha_channel = np.array(alpha)
+            inverted_alpha = 255 - alpha_channel
+            inverted_alpha_image = Image.fromarray(inverted_alpha)
+            replace_color_image.putalpha(inverted_alpha_image)
         replace_color_image_path = f"{image_name}_noline.png"
         replace_color_image.save(replace_color_image_path)
         lineart_image = lineart.convert('RGBA')
-        lineart_image.putalpha(255 - lineart_image.getchannel('A'))
+        lineart_alpha = 255 - np.array(lineart) 
+        lineart_image.putalpha(Image.fromarray(lineart_alpha))      
         lineart_image_path = f"{image_name}_lineart.png"
         lineart_image.save(lineart_image_path)