diff --git a/图像识别CV/pythoncv_learn/detection_chessboard_v4.py b/图像识别CV/pythoncv_learn/detection_chessboard_v4.py
index ede7d39..b9c8d71 100644
--- a/图像识别CV/pythoncv_learn/detection_chessboard_v4.py
+++ b/图像识别CV/pythoncv_learn/detection_chessboard_v4.py
@@ -136,6 +136,9 @@ cv2.imshow('houghLinesImage', houghLinesImage)
 thresh_min = min(dst.shape)
 lines = cv2.HoughLinesP(dst, 1, np.pi / 180, 200, minLineLength=int(dst.shape[0] * 0.45), maxLineGap=int(thresh_min * 0.5))
 
+# 过滤斜率
+lines = list(filter(lambda line: True if abs(line[0][0] - line[0][2]) < 280 or abs(line[0][1] - line[0][3]) < 280 else False, lines))
+
 houghLinesImage = img.copy()
 for line in lines:
     x1,y1,x2,y2 = line[0]