Update app.py

app.py

@@ -33,7 +33,7 @@ def infer(image_in):
         hull = cv2.convexHull(approx, returnPoints=False)
         sides = len(hull)
 
-        if 4 > sides > 2 and sides + 2 == len(approx):
+        if 6 > sides > 3 and sides + 2 == len(approx):
             arrow_tip = find_tip(approx[:,0,:], hull.squeeze())
             if arrow_tip:
                 cv2.drawContours(img, [cnt], -1, (0, 255, 0), 3)