Update app.py

app.py

@@ -159,9 +159,9 @@ def remove_bg(fl):
 
     blur_s = []
     edges = cv2.Laplacian(cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY), cv2.CV_64F)
-    for i in range(0, frame.shape[0]):
+    for i in range(2, frame.shape[0]-2):
         blur_s.append([])
-        for j in range(0, frame.shape[1]):
+        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].append(d)