Update app.py

app.py

@@ -48,7 +48,7 @@ def infer(image_in):
     contours, hierarchy = cv2.findContours(preprocess(img), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
 
     for cnt in contours:
-        peri = cv2.arcLength(cnt, False)
+        peri = cv2.arcLength(cnt, True)
         approx = cv2.approxPolyDP(cnt, 0.02 * peri, True)
         hull = cv2.convexHull(approx, returnPoints=False)
         sides = len(hull)