Please help me to understand "Channel Mixer"

[patdavid]

@hardywang

Based on your formula, I should get

Red: 0.6050 + 0200 + 0.2010 = 32
Green: 050 + 0.60200 + 0.2010 = 122
Blue: -0.2050 + 0.20200 + 0.40*10 = 34

So if I set the slides to:

Red: R64, G0, B0
Green: R0, G61, B0
Blue: R0, G17, B0

It should produce same color?

1. Why are you scaling your slider results? If you wanted the same result as “faded golden 1” you can set the sliders to R32, G122, B34.
2. This is the most important thing: this will make the example pixel value like “faded golden 1” only for this one pixel (R50 G200 B10).

Pretend the very next pixel has a value of R100 G150 B10. Applying your “faded golden 1” channel mixer values to it yields:

Red: 0.60100 + 0150 + 0.2010 = 62
Green: 0100 + 0.60150 + 0.2010 = 92
Blue: -0.20100 + 0.20150 + 0.40*10 = 14

Which is not the same thing as setting the sliders directly to R32 G122 B34…

You will not be able to replicate the color across your entire image to match the “faded golden 1” preset by only modifying the associated color slider with the channel (reds on red, greens on green, blues on blue).