Update app.py

app.py

@@ -126,9 +126,12 @@ def load_image_from_data_url(data_url: str) -> Image.Image:
     """Load image from base64 data URL"""
     if data_url.startswith("data:image/"):
         # Extract base64 data after the comma
-        header, encoded = data_url.split(",", 1)
-        image_data = base64.b64decode(encoded)
-        return Image.open(BytesIO(image_data))
+        if "," in data_url:
+            header, encoded = data_url.split(",", 1)
+            image_data = base64.b64decode(encoded)
+            return Image.open(BytesIO(image_data))
+        else:
+            raise ValueError(f"Invalid data URL format: {data_url[:50]}...")
     else:
         # Regular URL, use existing load_img function
         return load_img(data_url, output_type="pil")