我希望您能使用霍夫变换检测这些矩形的边线,
以下是OpenCV代码:
但它只能检测到一行,如何检测所有行?
在测试此代码并选择这些参数后:
我得到了这个结果:
我更改了参数,但那一行没有被检测到,我应该如何更改参数以使该行被检测到?
![enter image description here](https://istack.dev59.com/V3Z51.webp)
import cv2
import numpy as np
img = cv2.imread('C:/Users/hp/rectangles.jpg')
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.jpg',img)
在测试此代码并选择这些参数后:
import cv2
import numpy as np
img = cv2.imread('dave.jpg')
gray = cv2.cvtColor(img,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)
for x1,y1,x2,y2 in lines[0]:
cv2.line(img,(x1,y1),(x2,y2),(0,255,0),2)
cv2.imwrite('houghlines5.jpg',img)
findContours()
来完成这个任务吧? - Mark Setchell