#Introduction and examples to Rainbow Tonemapping.
It is not easy to describe purpose and algorithm behind this plugin. I might say the goal is to create fancy or surrealistic images from your photos. The base explanation is that RGB values (either average of them or each of them separately) are periodically replaced by defined range of colors. Mathematically it resembles sinusoid curve with few periods where
periods = 255 / period_lenght
Resulting effect of this sinusoid looks like this:
bottom strip is original, middle strip is to show tonemapping with lenght 80 (three gradients are created within originale lenght 255) and border colors are black and white.
Upmost strip is example with smaller new gradient lenght and custom border colors (shade of red and yellow).
The plugin work with two modes
For examples look below
Plugin window look like this:
and can be found at FILTERS/ARTISTIC/RAINBOW TONEMAP
Plese note here that when you leave default border colors white and black, result is black and white image. But feel free to experiment and change these border colors.
Well, I have no new ideas. If you have any, let me know.
My email: tiborb95 at gmail dot com
This plugin is distributed for free and under GPL license. I dont expect earning big money from this, but if the tool is useful / fun to use for you, you can consider paying a voluntary price for the time I spent developing and maintaining it.
You can also visit homepages (with introduction and examples) of other gimp plugins I made: