update blend

app.py

@@ -4504,7 +4504,7 @@ with demo:
                 for i, ncut_image in enumerate(ncut_images):
                     original_image = original_images[i]
                     original_image = np.array(original_image)
-                    if original_image.dim == 2:
+                    if len(original_image.shape) == 2:
                         original_image = np.stack([original_image] * 3, axis=-1)
                     ncut_image = ncut_image.resize(original_image.shape[:2][::-1], Image.LANCZOS)
                     ncut_image = np.array(ncut_image)