Update app.py

app.py

@@ -4,9 +4,11 @@ import numpy as np
 
 def preprocess(img):
     img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
-    img_thresh = cv2.adaptiveThreshold(img_gray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, 11, 2)
-    img_dilate = cv2.dilate(img_thresh, np.ones((3, 3)), iterations=2)
-    img_erode = cv2.erode(img_dilate, np.ones((3, 3)), iterations=1)
+    img_blur = cv2.GaussianBlur(img_gray, (5, 5), 1)
+    img_canny = cv2.Canny(img_blur, 50, 50)
+    kernel = np.ones((3, 3))
+    img_dilate = cv2.dilate(img_canny, kernel, iterations=2)
+    img_erode = cv2.erode(img_dilate, kernel, iterations=1)
     return img_erode
 
 def find_tip(points, convex_hull):
@@ -20,6 +22,8 @@ def find_tip(points, convex_hull):
         if np.all(points[j] == points[indices[i - 1] - 2]):
             return tuple(points[j])
 
+
+
 def infer(image_in):
     img = cv2.imread(image_in)