Bug with Working Space Tone Response Curve and bundled profiles

[samuelchia]

@gaaned92

In countless posts, @aurelienpierre mightly asserts that processing must be done in a linear RGB space (surely with the exception of artistic functions).

Hmm, you make it sound like some kind of gospel truth from Aurelien. Processing of raw images isn’t done in linear RGB because Aurelien says so, it is that way because it is optimal and was certainly known before Aurelien asserted it.

Correct me if I’m wrong, RawTherapee has been processing raw images in linear space for almost a decade already.

@gaaned92

So if a non linear TRC is defined in workingspace/TRC , the rawpedia pipeline page shows that whole RGB pipeline is performed in non linear space.
@jdc could you clarify, and if required correct accordingly rawpedia. thanks in advance.

I think he already answered this here:

Rawtherapee Working Profile TRC

All the threatment in RT is in linear mode : TRC with gamma=1 slope = 0 But at the end, in such a way that the image is viewable, it’s applied a gamma sRGB (g=2.4 s=12.92) But there are 2 exceptions: in “Color” / “Color management” /“Tone response curve” you can change gamma sRGB by a TRC with gamma and slope as you want. This thretament is apply at the beginning of RGB in “Local adjustements” / shadowsHighlight -Tone equalizer TRC If you choose “Tone equalizer TRC” you can change T…