霍夫变换@Fu Xianjun. All Rights Reserved.

霍夫变换@Fu Xianjun. All Rights Reserved.

使用步骤

1.引入库

代码如下：

import cv2

import numpy as np

2.1读入数据

代码如下：

HoughLines

import cv2

import numpy as np

img = cv2.imread("shape.png")#读取原图

gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

edge = cv2.Canny(gray,50,150)

lines = cv2.HoughLines(edge,1,np.pi/180,50)

#画线

for line in lines:

    rho,theta = line[0]

    a = np.cos(theta)

    b = np.sin(theta)

    x0 = rho * a

    y0 = rho * b

    x1 = int(x0 + 1000 * (-b))

    y1 = int(y0 + 1000 * a)

    x2 = int(x0 - 1000 * (-b))

    y2 = int(y0 - 1000 * a)

    cv2.line(img,(x1,y1),(x2,y2),(0,255,0),2)

cv2.imshow("img",img)

cv2.imshow("gray",gray)

cv2.imshow("