I wonder how difficult it would be to make a programmatic BAT to BASH converter that only had to handle these scripts. It would probably get more traction that way.

Bluntly، if I was the author, I'd scream "hell, no!".

Transcribing the scripts is straight forward, if you cannot do that, chances are high I'd like to be payed to debug your problem.

ImageMagick is a beast. Mighty but definitely not user friendly.

edit: trying to say that it can do everything - if you already know image manipulation.

The bottom of the page suggests the author wouldn't object to a third party doing it.

There's a link in the introduction to Fred's ImageMagick scripts, which are also worth a look:

http://www.fmwconcepts.com/imagemagick/index.php

This is coming right on time (I'm looking at various screenshot differs for a 3D tool application (shaders, etc.)) - http://im.snibgo.com/phashthresh.htm