本文主要是介绍python实现opencv学习十八：直线检测，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
代码如下：
# -*- coding=GBK -*-
import cv2 as cv
import numpy as np#霍夫直线检测
def line_image(image):gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)edges = cv.Canny(gray, 50, 150, apertureSize=3)lines = cv.HoughLines(edges, 1, np.pi/180, 200)for line in lines:rho, theta = line[0]a = np.cos(theta)b = np.sin(theta)x0 = a * rhoy0 = b * rhox1 = int(x0+1000*(-b))y1 = int(y0+1000*(a))x2 = int(x0-1000*(-b))y2 = int(y0-1000*(a))cv.line(image, (x1, y1), (x2, y2), (0, 0, 255), 2)cv.imshow("直线", image)src = cv.imread("C://01.png")
cv.imshow("原来", src)
line_image(src)
cv.waitKey(0)
cv.destroyAllWindows()运行结果：
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