python常常用opencv模块来处理图像。

import cv2 as cv

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默认按照彩色三通道读取：

img = cv2.imread(path)

读取灰度图：

img = cv2.imread(path, cv2.IMREAD_GRAYSCALE)


#彩色图转灰度图
gray = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
#彩色图转HSV [255,255,128]
img2 = cv.cvtColor(img, cv.COLOR_BGR2HSV)
#彩色图转HSV [255,255,255]
img2 = cv.cvtColor(img, cv.COLOR_BGR2HSV_FULL)
#灰度图转伪彩色图 JET
img2 = cv.applyColorMap(gray, cv.COLORMAP_JET)
#JET图转灰度图
img2 = cv.cvtColor(img, cv.COLOR_JET2GRAY)

伪彩色图参考笔记：https://blog.csdn.net/dulingwen/article/details/102739940

cv.imwrite(path, img2)

【持续更新】

参考这篇笔记：

https://www.cnblogs.com/shizhengwen/p/8719062.html