Update app.py

app.py

@@ -157,10 +157,10 @@ def remove_bg(fl):
     frame_c = (frame.astype(np.int16)-bg_diff).astype(np.uint8)
 
 
-    blur_s = []
+    blur_s = np.array([])
     edges = cv2.Laplacian(cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY), cv2.CV_64F)
     for i in range(2, frame.shape[0]-2):
-        blur_s.append([])
+        blur_s.append(np.array([]))
         for j in range(2, frame.shape[1]-2):
             d = edges[i-2:i+2,j-2:j+2].var().astype(np.uint8)
             blur_s[i-2].append(np.array([d]))