Update app.py

app.py

@@ -435,7 +435,7 @@ def seg_frame(newmask):
     bg = cv2.dilate(newmask, element)
     bg[bg.shape[0]-64:bg.shape[0],0:bg.shape[1]] = 0
 
-    mask = np.zeros(depth.shape[:2],np.uint8)
+    mask = np.zeros(newmask.shape[:2],np.uint8)
     # https://docs.opencv.org/4.x/d8/d83/tutorial_py_grabcut.html
     # wherever it is marked white (sure foreground), change mask=1
     # wherever it is marked black (sure background), change mask=0