I generalized the pencil sketch idea to include color as well as black and white and added a few more bells and whistles to the program like a a simple user interface. It runs slower because it's generalized but it has the ability to do almost every type of post processing function imaginable such as enhancing edges, greyscale, gaussian blurs, etc. I think i will put this in the public domain somewhere on Corncucopia and let other Python hacks add more filter functionality.