这是相当不寻常的，因为图像处理通常在未压缩的图像上完成 - 这使图像文件格式无关紧要。

That is rather unusual because image processing is normally done on uncompressed images - which makes image file format irrelevant.

In任何情况下你都可以将图像加载到内存中并以任何支持的格式保存。

In any case you can load image into memory and save it in whatever format is supported.