（13）Corner Detection角点检测

import cv2

import numpy as np

img=cv2.imread('opencv-corner-detection-sample.jpg')

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

gray = np.float32(gray)

#最多使用100个角点，点之间的最小距离是10

corners = cv2.goodFeaturesToTrack(gray,100,0.01,10)

corners = np.int0(corners)

for corner in corners:

        x,y=corner.ravel()

        cv2.circle(img,(x,y),3,255,-1)

cv2.imshow('img',img)

cv2.waitKey(0)

cv2.destroyAllWindows()