使用houghline变换识别图像中的直线

时间:2017-05-23 04:57:22

标签: python opencv image-processing hough-transform scikit-image

我尝试过openCV和skimage的HoughLine变换

我无法识别此图像的直线。

https://s3.amazonaws.com/imagedata-toi/houghlines5.png

我提到了文件中给出的代码

http://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_imgproc/py_houghlines/py_houghlines.html

我一直在检测一条线。

我甚至尝试了教程中显示的数独图像,并且我一直在检测单行。

我做错了什么?

(如果相关,我正在使用python3)

import cv2
import numpy as np

img = cv2.imread('edges.png')
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
edges = cv2.Canny(gray,50,150,apertureSize = 3)

lines = cv2.HoughLines(edges,1,np.pi/180,200)
for rho,theta in lines[0]:
    a = np.cos(theta)
    b = np.sin(theta)
    x0 = a*rho
    y0 = b*rho
    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),(0,0,255),2)
cv2.imwrite('houghlines3.png',img)

Code Output

0 个答案:

没有答案