Rob A's (Im)personal Blog.

A few improvements have been made to my histogram match script. The big new features include histogram interpolation, and adjustments for saturation and contrast. Special thanks to Isomage who helped with some of the scheme subroutines.

The download can be found here...

For some bizarre reason I needed to transfer the histogram profile from one image to another image. Turning to Gimp, I decided to script it. I used script-fu, as I am still trying to learn python. The basic premise is to sample the histogram of both images, then convert them into an incremental function. Following that, you determine the transfer function to convert back from the one to the other. I realize that sounds complicated, but it isn't that bad. Here is a diagram:

So all I had to do was write a gimp script to do this. No Problem!

Previously, I had developed a small script to take an image and turn it into a GIMP gradient. This was mainly due to my desire to convert some of these tonal gradients into actual GIMP gradients. This script was posted to the gimp-plugin^[?] repository by someone else (with my permission) but seems to have been removed.

My work with paths when creating the tapered stroke script got me thinking about making a script that could sample along a path and create a gradient.