[Image-SIG] reading part of an image

[Xiao]

Hi, is it possible to read only a part of an image (png or gif) by PIL?

For example, an image is 20000x20000 in pixels. Is it possible for python to
read only 100x100 of the picture (not loading the whole picture) and save
the small part to a new png file?

Any ideas would be appreciated. Thanks.
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