Update app.py

app.py

@@ -153,10 +153,10 @@ def remove_bg(fl):
     #correct hue against light
     bg_gray = cv2.cvtColor(cv2.cvtColor(bg, cv2.COLOR_BGR2GRAY), cv2.COLOR_GRAY2BGR)
     bg_diff = (bg-bg_gray).astype(np.int16)
-    frame = (frame.astype(np.int16)-bg_diff).astype(np.uint8)
+    frame_c = (frame.astype(np.int16)-bg_diff).astype(np.uint8)
     
     #remove regions of low saturation (get scene without shadow)
-    m = cv2.inRange(cv2.cvtColor(frame, cv2.COLOR_RGB2HSV), np.array([0,0,0]), np.array([180,32,256]))
+    m = cv2.inRange(cv2.cvtColor(frame_c, cv2.COLOR_RGB2HSV), np.array([0,0,0]), np.array([180,32,256]))
     frame[m>0] = (127,127,127)
     frame = cv2.medianBlur(frame, b)