python实现图片变亮或者变暗的方法

本文实例讲述了python实现图片变亮或者变暗的方法。分享给大家供大家参考。具体实现方法如下：

    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 < 1.0 < lighter
    # (.bmp and .gif files give goofy results)
    # note that lambda is akin to a one-line function
    im2 = im1.point(lambda p: p * 0.5)
    # brings up the modified image in a viewer, simply saves the image as
    # a bitmap to a temporary file and calls viewer associated with .bmp
    # make certain you have associated an image viewer with this file type
    im2.show()
    # save modified image to working folder as Audi2.jpg
    im2.save("angelababy2.jpg")

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。