Talk:Rank filter

What are "mean filters" and "mode filters", and how are they rank filters? That is, how can a mean be used to determine a rankig? And what is this talk about "gradient diffusion filters"? To me, that looks like a Sobel operator, that is again: no true rank filter. -- 790 ♫ 16:45, 2 December 2008 (UTC)

This page is incorrect, "mean" filters are kernel filters with a matrix of 1, not rank filters. I will alter it accodingly.