Histogram specification?

[Tobias]

I think what you are looking for is the CLUT from after-before layers filter from g’mic:

Release of G'MIC 2.4.0

This is the changelog for the release of the 2.4.0 version of the G’MIC software. It lists all new features and changes done since the latest major version 2.3.0. What is G’MIC? G’MIC (GREYC’s Magic for Image Computing) is a full-featured open-source framework for image processing. It provides several different user interfaces to convert/manipulate/filter/visualize generic image datasets, ranging from 1d scalar signals to 3d+t sequences of multi-spectral volumetric images, thus including 2d c…