python opencv Harris角点检测

原理
https://www.cnblogs.com/ronny/p/4009425.html
讲的比较傲清晰

import cv2
import numpy as np

filename = 'jiaodian.jpg'
img = cv2.imread(filename)
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

gray = np.float32(gray)
dst = cv2.cornerHarris(gray,2,3,0.04)

# #result is dilated for marking the corners, not important
# dst = cv2.dilate(dst,None)

# Threshold for an optimal value, it may vary depending on the image.
img[dst>0.01*dst.max()]