不能将 RGBA 模式写成 JPEG 格式

我正在学习使用’枕头5.0’下面的书’自动化的无聊的东西与蟒蛇’

关于图像对象的信息

In [79]: audacious = auda
In [80]: print(audacious.format, audacious.size, audacious.mode)
PNG (1094, 960) RGBA

当我尝试转换文件类型时，它报告错误。

In [83]: audacious.save('audacious.jpg')
OSError: cannot write mode RGBA as JPEG

根本没有书中的错误。

95126

小开

最佳答案

JPG does not support transparency - RGBA means Red, Green, Blue, Alpha - Alpha is transparency.

You need to discard the Alpha Channel or save as something that supports transparency - like PNG.

The Image class has a method convert which can be used to convert RGBA to RGB - after that you will be able to save as JPG.

im = Image.open("audacious.png")
rgb_im = im.convert('RGB')
rgb_im.save('audacious.jpg')