python实现图片变亮或者变暗的方法

import Image
# open an image file (.jpg or.png) you have in the working folder
im1 = Image.open("angelababy.jpg")
# multiply each pixel by 0.9 (makes the image darker)
# works best with .jpg and .png files, darker 

运行效果如下所示：

希望本文所述对大家的Python程序设计有所帮助。