A new tool in Rawtherapee “Abstract Profile”
Since yesterday and commit 35abd92, the main branch “dev” contains a new concept “abstract profile”.
Three main uses - this “abstract profile” has 3 components:
TRC: adjust gamma and slope to: a) modify the image rendering which by default is g=2.4 s=12.92; b) raise the shadows and modify the lighter tones
Illuminant (white point): a) adjust the gamut of the Working profile to adapt it to the shooting conditions taking into account the colorimetry. b) used in conjunction with the primary modifications below.
Primaries: this is where the notion of “Abstract profiles” comes into its own. Several possibilities are offered: a) Use this module as a “Channel mixer” in order to achieve, if desired, special effects similar to “Color Toning”, with or without Ciecam; b) Use it to modify or refine the result of the Input profile to improve the colorimetry (calibration)
You will find most of the answers to questions you may have in the documentation. What is an “Abstract profile”, how does it work, etc.
Some components - in particular the “primary” part - are close in their principles to tools found in Lightroom, Darktable, ART,… but the implementation is totally different.
I also thank @Lawrence37 @heckflosse @floessie for the code review work (bug, optimization, readability…), and Wayne @Wayne_Sutton for his advice, his listening and the translation into good English of the labels, tooltips and documentation.
I remain at your disposal for further explanations.