This is primarily a library for reading portable bitmap (PBM),
portable graymap (PGM), and portable pixmap (PPM) files. These image
formats are only the barest step up from raw data, and have a very
simple format which is the key to be "portable". Writing out images in
these formats is very easy.

WWW:	http://search.cpan.org/dist/Image-PBMlib/