Posted by newmikey on 2023-03-22.

I cannot find the RGB Levels module even if I filter on “levels”. Has it been ditched in favour of something newer? If no, where should I find it and if yes, how can I manually adjust levels?

Version info: I’m running the V0.0.0+280~g34f3da09a as an appimage on Manjaro Linux

This issue (if it is an issue and not my inexperience with Ansel) is present both on my laptop as well as my desktop

[attachment lost: image was hosted on the retired forum]

Replies

Scorpion078 — 2023-03-22

You have to use the color calibration module.

The first tab is CAT what is used for white balance after that you RGB tabs for each of the color channel.

newmikey — 2023-03-22

That doesn’t really look like the levels tool described in the documentation or the one I’m used to in DT - I think you’re very kind to help but I may have misrepresented my question. This is the tool I’m searching for:

[attachment lost: image was hosted on the retired forum]

Scorpion078 — 2023-03-22

The levels and rgb levels modules are deprecated

Scorpion078 — 2023-03-22

Check this link:

https://ansel.photos/en/doc/special-topics/from-darktable/#modules-deprecated

Scorpion078 — 2023-03-22

RGB levels is display referred, Ansel’s philosophy is scene referred

newmikey — 2023-03-22

Thanks for the help!

Aurélien Pierre — 2023-03-23

The whole story is the GUI of levels expect bounded signals in 0-100%. Scene-referred is unbounded by nature, so it’s not compatible. Also, the levels tools is internally just an offset (black) and a gain/exposure (white), with a power function in the middle (grey), so you have already all that in color balance RGB. More on https://ansel.photos/en/workflows/scene-referred/

newmikey — 2023-03-23

Thnks!

Translated from English by : Aurélien Pierre, ChatGPT, Claude, Claude (Anthropic). In case of conflict, inconsistency or error, the English version shall prevail.