cv2做hough直线检测

本篇博客主要介绍使用python中的cv2模块做hough直线检测。

示例代码：

import cv2
import  numpy as np

cap = cv2.VideoCapture(0)

while cap.isOpened():
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    edges = cv2.Canny(gray, 50, 150, apertureSize=3)

    minLineLength = 100
    maxLineGap = 10
    lines = cv2.HoughLinesP(edges, 1, np.pi / 180, 100, minLineLength, maxLineGap)
    if lines is None:
        continue
    print("Len of lines:", len(lines))
    print(lines)

    for line in lines:
        x1, y1, x2, y2 = line[0]
        cv2.line(frame, (x1, y1), (x2, y2), (0, 255, 0), 2)

    # cv2.imwrite('houghlines5.jpg',img)
    cv2.imshow("houghlines3.jpg", frame)

    key = cv2.waitKey(1)
    if