RGB filters for different forms of color blindness

Question

My father is color blind and given that I work in games where the visuals are important, I\'ve always wanted to write a filter for screen shots (or even some type of shader) tha

Answer 1

Can't help you on algorithms, but the following article was quite an eye-opener (excuse the pun): http://critiquewall.com/2007/12/10/blindness.

Ah, actually, http://www.vischeck.com/ is useful.