Python Image Library Image Resolution when Resizing

Question

I am trying to shrink some jpeg images from 24X36 inches to 11X16.5 inches using the python image library. Since PIL deals in pixels this should mean scaling from 7200X 4800

Answer 1

To preserve the DPI, you need to specify it when saving; the info attribute is not always preserved across image manipulations:

dpi = im.info['dpi']  # Warning, throws KeyError if no DPI was set to begin with

# resize, etc.

out.save("out.jpg", dpi=dpi)