python opencv 转为灰色图片
# coding:utf-8
import cv2 as cv
img = cv.imread("a.jpg", cv.IMREAD_GRAYSCALE)
cv.imwrite('grayscale_4.jpg', img)
if __name__ == "__main__":
pass
# coding:utf-8
import cv2 as cv
img = cv.imread("a.jpg", cv.IMREAD_GRAYSCALE)
cv.imwrite('grayscale_4.jpg', img)
if __name__ == "__main__":
pass
