python 图片灰度化处理

import cv2

def Image_gray(image):#灰度化函数
    h, w, ch = image.shape
    for row in range(h):
        for col in range(w):
            b = image[row, col, 0]
            g = image[row, col, 1]
            r = image[row, col, 2]
            k = int(max(b,g,r))
            # 取三个通道内的最大值来计算每一个像素值
            image[row, col, 0] = k
            image[row, col, 1] = k
            image[row, col, 2] = k
    print("Ok！")
    cv2.imshow("noise", image)
    cv2.waitKey(1000)
    cv2.imwrite("gray.png", image)


img=cv2.imread('4.png')#读取图像信息
cv2.imshow('img',img)
cv2.waitKey(1000)
blur=Image_gray(img)

 转载于：

https://blog.csdn.net/qq_49385628/article/details/118935148