Balance filter based of Gauss blur.
Balance is a thin filter (unlike others that use a thick difference between
the original image and its blurred version) that uses the difference between
a single and double radius blurred version of the original image
(single and double sigma).
This difference is used not directly, but by applying an overlay four times,
with the colors inverted.
This filter was first applied in STEX (2024) in a single-component version (Y, the values of the color components were aligned in accordance with the brightness values before and after the filter).
It was later implemented in a full-color version in stbibalance (2024).
Copy balance.scm in:
- Linux:
~/.config/GIMP/2.10/scripts - Windows:
C:\Program Files\GIMP 2\lib\gimp\3.0\scripts
- CLI based STB: stbibalance.
- Examples: stbibalance-examples.
Homepage: https://github.com/ImageProcessing-ElectronicPublications/gimp-plugin-balance
2025