update padding

app.py

@@ -268,7 +268,7 @@ def preprocess_mask(mask_img: Image.Image) -> Image.Image:
     target_width = 1024
     m = _pad_or_crop_to_width_np(m, target_width, pad_value=0)
 
-    kernel = np.ones((17, 17), np.uint8)
+    kernel = np.ones((12, 12), np.uint8)
     m = cv2.dilate(m, kernel, iterations=1)
 
     if DEBUG_SAVE: