Keep the aspect ratio through ImageOps.fit

[milot-mirdita]

With the use of ImageOps.fit the aspect ratio of the picture isn't distorted. This cuts off (in a pretty dumb way) that is outside of the center. A better approach might be something based on image entropy to cut out "uninteresting" parts of the images. Reddit uses a setup similar to this to make good thumbnails.

[ranman]

You can also do this:

imgsize = 900, 900
img.thumbnail(imgsize, Image.ANTIALIAS)

Which will preserve the aspect ratio intelligently.