原始图 角点检测 points = cv2.goodFeaturesToTrack(gray, 100, 0.01, 10) points = np.int0(points).reshape(-1,2) for point in points: x, y = point.ravel() cv2.circle(img, (x, y), 10, (0, 255, 0), -1) 连线 cv2.line(img, (0, y1), (1000, y1), (0, 255, 0), th