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+--- Thread: Rotate/Map/Change a selected range of colors, to corresponding range of grays (/Thread-Rotate-Map-Change-a-selected-range-of-colors-to-corresponding-range-of-grays)
Rotate/Map/Change a selected range of colors, to corresponding range of grays - Brian.Raila - 02-19-2021
Timely assistance earnestly requested. This HAS to be simple; I am at a loss.
A: See attached –– 'Original - Green Halo'
I seek to Rotate Colors, such that the shaded Greens become shaded grays. That's it.
I'm familiar with Colors > Map > Rotate Colors... , and can Rotate the Greens to any arbitrary color range.
B: See attached –– 'Edit - Rotated-Color Halo'
There is no end of guidance on the art of manipulating grayscale images into endless variants. I cannot for the life of me gain insight on the reverse.
Your advice is most gratefully welcome.
– BR
RE: Rotate/Map/Change a selected range of colors, to corresponding range of grays - Ofnuts - 02-20-2021
This is just removing the "saturation". Select the screen (lasso in "Polygon" mode, for instance)(you don't even need to be accurate).
The Color>Saturation and set the Scale to 0.
[attachment=5654]
RE: Rotate/Map/Change a selected range of colors, to corresponding range of grays - Brian.Raila - 02-20-2021
Well I'll be!
To quote Brian.Raila, "This HAS to be simple."
I'd not recognized the notion of "Current Color", being operated on. Yes, I had selected a region, as you suggest, within which to Rotate Colors [using Rectangle Select]. But I'd assumed that subsequent operation therein would affect ALL colors [e.g. the tabletop, wall, flesh].
With thanks, and hats off to Ofnuts !
– BR