Photo Effects
If you've spent much time playing around with The GIMP (or PhotoShop) you've
noticed that there are lots of neat little tricks you can use to alter an
image. Someone had to write routines to make those technique work for The
Gimp (or whatever other photo manipulation program you've played around
with). This lesson shows you a few of these technique so you can try them
out for yourself.
Assignment: Do the assignment for Color Inversion.