import cv2
import numpy as np
img =cv2.imread('pie.png')
print('img.shape',img.shape)
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
#gray = np.float32(gray)
dst = cv2.cornerHarris(gray,2,3,0.04)
print('dst.shape',dst.shape)
img[dst>0.01*dst.max()]=[0,0,255]
cv2.imshow('dst',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
