> Since both have huge speed impacts, most people writing graphics libraries don't like to do them. Python Image Library does gamma correct rescale by default.

> Since both have huge speed impacts, most people writing graphics libraries don't like to do them. Python Image Library does gamma correct rescale by default. I did not realize this until I wrote my own implementation. I thought it would be several times slower than the built in, but it was only 3% slower. Boy was I surprised when I figured out why.