Update app.py

app.py

@@ -17,14 +17,14 @@ def preprocess(img):
 
     # Dilate the edges
     kernel = np.ones((3, 3))
-    img_dilate = cv2.dilate(img_canny, kernel, iterations=2)
+    img_dilate = cv2.dilate(img_canny, kernel, iterations=1)
     cv2.imwrite("4_dilate.png", img_dilate)
 
     # Erode the dilated edges
     img_erode = cv2.erode(img_dilate, kernel, iterations=1)
     cv2.imwrite("5_erode.png", img_erode)
 
-    return img_canny
+    return img_dilate
 
 def find_tip(points, convex_hull):
     length = len(points)