Gaussian Blur

On another blog, I wrote a post about Gaussian blur and what it actually means. This is a pretty widely used function in Photoshop, so I thought it would be useful to describe what's actually going on at the pixel level. Rather than repeat all this, I'll just include the link:

http://technologyforartists.blogspot.com/2008/07/gaussian-blur.html

That other blog, by the way, was sort of a precursor to this one, so I may refer to it from time to time, but more often, I'll rewrite and repost any good stuff here.