opencv黑帽blackhat

#闭运算之后得到的图像与原始图像的差
import cv2
import numpy as np
img = cv2.imread('1.jpg',0)

#用numpy生成卷积核
kernel = np.ones((5,5),np.uint8)
blackhat = cv2.morphologyEx(img, cv2.MORPH_BLACKHAT, kernel)

cv2.imshow('blackhat',blackhat)
cv2.waitKey(0)
cv2.destroyAllWindows()