Newbie: how should I approach this colormatching ..?

[anon8280290]

@anon8280290

@Acebone

As you can see, the blue is in the blue channel (bottom) is boosted from 100 to 108, which is counteracted by subtracting 4 from the red and the green channel respectively. Net change: 0

But the red is pretty strange: I boost red by 200, and subtract 100 and 3 from the others - giving a net change of 97 … It works, but I am not sure why

The three-channel color mixer is mathematically the same as a 3x3 matrix.

See here for a good reference:

explanation of channel mixer working

A year ago I started using Darktable and, as many, digested all YouTube tutorials. One module stayed an enigma, the channel mixer. The DT manual on it is short and lacks background info, the tutorials vary in extent and approach: some intuitive, others mathematical. I frequently read blogs with statements as ‘I still have problems, don’t fully understand’. Some tutorials needed a second one as the first wasn’t sufficiently clear. Apparently a module hard to explain and grasp. So I scraped all p…