With version 7, Photoshop added an anisotropic diffusion option to its diffuse plugin. It does the kind of anisotropic diffusion that is usually called "coherance-enhancing." It's a very useful effect because it has a way of refining lines. Very useful for refining renderings used in photo-art and other things. The problem is, it has no controls.
So I've been looking over the web a plugin or stand-alone, and short of buying magnetic resonance imaging software, scientific development software, or aerial photograph software -- I can't find anything else that can do this. So I thought I would ask here.
BTW, if anyone is curious about anisotropic diffusion, here is a page with some photos of different kinds of anisotropic diffusion:
http://www.mia.uni-saarland.de/weickert/demos.html
And here is a technical PDF file about it
http://www.math.uni-bremen.de/~dlorenz/ ... ancing.pdf