[lug] Image processing

[Richard Hollos]

>On that note, the operation you describe would be trivially easy with
>Mathematica:  import bitmaps as lists of intetegers, subtract the
>resulting 2 lists, export bitmap.

>Mathematica is amazingly expensive, but if you have it that is what I
>would probably do.  (I've gotten good enough with Mathematica that
>doing stuff like this is easier that way than reading the man page
>for free tools I have that could do it too).

If you can do it in Mathematica, you should be able to do it in Maxima,
which is free (GPL) http://maxima.sourceforge.net/

Richard Hollos