Selective tone versus Tone curve

[platypus (Canon & Mac (Intel and M1))]

@Joanna

My questions are…

…and we might add: What effect does such a (luma) curve have on colour’s?

New Luminosity Curve - a word of warning

DxO calls it the luminance or luma curve. Luminosity is a different beast, but related. Luminance is a weighted value that takes human vision into account. Luminosity doesn’t do that and (our perception of) colours can shift due to such differences. [Screen @ 2024-10-31 um 14.01.31] Above, we see the results of pulling the “white point” towards the center of the tone curve’s scope, once for the RGB curve and once for the LUMA curve. Depending on how each RGB triplet travels in 3D, perceived…