图像边缘检测算法

代码：

#coding=utf8
#图像边缘检测
import numpy as np
import cv2
import time
def cannyedge():
    capInput = cv2.VideoCapture(0)
    if not capInput.isOpened(): print('Cap failed because of camera')

    while 1:
        ret, img = capInput.read()
        edges = cv2.Canny(img, 80, 150)#显示图像边缘
        cv2.imshow('Edge', edges)
        if cv2.waitKey(1) & 0xFF == 27:
            break
        elif cv2.waitKey(1) & 0xFF== ord(' '):#按下空格键之后暂停屏幕
            while cv2.waitKey(1) & 0xFF != ord(' '): time.sleep(.1)
    # When everything done, release the capture
    capInput.release()
    cv2.destroyAllWindows()
cannyedge()