Image::Magick was also my first idea, but after more thought I doubt if it will be sufficient. I recently had a program that needed to read individual pixel color values from an image. From what I understand about Image::Magick, the underlying libraries support such functionality, however the Perl API for those libraries does not.

I'm pretty sure that we'd have to be able to read pixel values for this problem, so perlMagick won't work. I'd love for someone to prove me wrong though!

-caedes