pencv candy边缘检测

opencv将边缘检测方法放到一个函数中。

cv.Canny()

参数|描述
img|图像
minVal|
maxVal|
aperture_size|寻找图像渐变的Sobel内核大小，默认为3

import numpy as np
import cv2 as cv
from matplotlib import pyplot as plt
img = cv.imread('messi5.jpg',0)
edges = cv.Canny(img,100,200)
plt.subplot(121),plt.imshow(img,cmap = 'gray')
plt.title('Original Image'), plt.xticks([]), plt.yticks([])
plt.subplot(122),plt.imshow(edges,cmap = 'gray')
plt.title('Edge Image'), plt.xticks([]), plt.yticks([])
plt.show()