Update app.py

app.py

@@ -3,12 +3,27 @@ import cv2
 import numpy as np
 
 def preprocess(img):
+    # Convert to grayscale
     img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+    cv2.imwrite("1_gray.png", img_gray)
+
+    # Blur the image
     img_blur = cv2.GaussianBlur(img_gray, (5, 5), 1)
-    img_canny = cv2.Canny(img, 50, 50)
+    cv2.imwrite("2_blur.png", img_blur)
+
+    # Detect edges with Canny
+    img_canny = cv2.Canny(img_blur, 50, 50)
+    cv2.imwrite("3_canny.png", img_canny)
+
+    # Dilate the edges
     kernel = np.ones((3, 3))
     img_dilate = cv2.dilate(img_canny, kernel, iterations=2)
+    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_erode
 
 def find_tip(points, convex_hull):