1 The Puzzle library is designed to quickly find visually similar images
2 (GIF, PNG, JPG), even if they have been resized, recompressed, recolored
4 The library is free, lightweight yet very fast, configurable, easy to use
5 and it has been designed with security in mind.
7 WWW: http://libpuzzle.pureftpd.org/project/libpuzzle