December 13, 2007
(This post is from my old, old, super old site. My views have changed over the years, hopefully my writing has improved, and there is now more than a handful of folks reading my site. Enjoy.)
Michael Tsai has written a handful of Acorn plugins (in python) for trimming images- Acorn Trim Scripts.
"These scripts, inspired by Bosco’s Foto Trimmer, make it easy to crop a single row or column of pixels off the edge of an image. This can save you some intricate mouse work and/or manual typing of pixel values to resize the canvas, and it’s especially useful for manipulating screenshots."