

I had just been taught Scheme when the first alpha versions of the GIMP were released. When the Scheme-based, Script-Fu engine was added to the popular image editor, I was a kiddy in a candy store. I made a few web sites with Script-Fu scripts until I discovered a more Makefile-friendly way of doing some of those tasks (namely, Imagemagick). But the GIMP is always installed on my machine, I use it often, and I occasionally write scripts and add-ons for it.
Download these scripts here. To install, simply copy to your personal GIMP scripts directory. Under UNIX, this is usually ~/.gimp*/scripts/. Then reload the GIMP or go to Xtns → Script-Fu → Refresh.
The scripts are provided under the terms of the GNU General Public License, version 2.DuoTone simulates sepia toning and other toning processes. Subtly toned black and white photographs look much warmer and better than ordinary greyscale ones. DuoTone works like darkroom toning processes, it modifies a photo's midtones.