Update app.py

app.py

@@ -36,7 +36,7 @@ def run(image, item_name):
     print("sketch updated")
     print(image)
     empty_image = Image.new("L", (512, 512), 255)
-    diff = ImageChops.difference(image, empty_image)
+    diff = ImageChops.difference(image["composite"], empty_image)
     # if image["composite"] is None:
     if not diff.getbbox():
         ones = empty_image