Update app.py

app.py

@@ -101,7 +101,7 @@ def inference(img, version, scale):
         if img_mode == 'RGBA':  # RGBA images should be saved in png format
             extension = 'png'
         else:
-            extension = 'jpg'
+            extension = 'png'
         save_path = f'output/out.{extension}'
         cv2.imwrite(save_path, output)