Update app.py

app.py

@@ -56,6 +56,10 @@ def blend_images(base, overlay, mask):
     if len(base.shape) == 2:
         base = cv2.cvtColor(base, cv2.COLOR_GRAY2BGR)
 
+    # Convert mask to uint8 (0-255) if it's a boolean array
+    if mask.dtype == np.bool_:
+        mask = mask.astype(np.uint8) * 255
+
     # Ensure mask is single-channel grayscale
     if len(mask.shape) == 3:
         mask = cv2.cvtColor(mask, cv2.COLOR_BGR2GRAY)