diff --git a/main.py b/main.py
index b3f9c04..3ad7d2a 100755
--- a/main.py
+++ b/main.py
@@ -77,7 +77,7 @@ def main(only_spec=False, only_color=False):
             mask_spec = spec_detector.predict(img_data)
             mask_rgb = rgb_detector.predict(rgb_data)
         # 进行喷阀的合并
-        masks = [utils.valve_merge(mask, merge_size=Config.valve_merge_size) for mask in [mask_spec, mask_rgb]]
+        masks = [utils.valve_expend(mask) for mask in [mask_spec, mask_rgb]]
         # control the size of the output masks, 在resize前，图像的宽度是和喷阀对应的
         masks = [cv2.resize(mask.astype(np.uint8), Config.target_size) for mask in masks]
         # 写出
diff --git a/utils.py b/utils.py
index 538082e..57183cb 100755
--- a/utils.py
+++ b/utils.py
@@ -153,13 +153,18 @@ def size_threshold(img, blk_size, threshold, last_end: np.ndarray = None) -> np.
 def valve_merge(img: np.ndarray, merge_size: int = 2) -> np.ndarray:
     assert img.shape[1] % merge_size == 0  # 列数必须能够被整除
     img_shape = (img.shape[1], img.shape[0])
-    img = img.reshape((img.shape[0], img.shape[1]//merge_size, merge_size))
+    img = img.reshape((img.shape[0], img.shape[1] // merge_size, merge_size))
     img = np.sum(img, axis=2)
     img[img > 0] = 1
     img = cv2.resize(img.astype(np.uint8), dsize=img_shape)
     return img
 
 
+def valve_expend(img: np.ndarray) -> np.ndarray:
+    kernel = np.ones((1, 3), np.uint8)
+    return cv2.dilate(img, kernel)
+
+
 def read_envi_ascii(file_name, save_xy=False, hdr_file_name=None):
     """
     Read envi ascii file. Use ENVI ROI Tool -> File -> output ROIs to ASCII...