Jeff Harmon schrieb:
My understanding also is that workspace profiles such as Adobe RGB are perceptually uniform, in the sense that edits of the same increments anywhere amount to the same amount of change.
No, not really. But of course more uniform than for instance a raw scan with gamma=1.
I cannot imagine that a preceptually uniform RGB color space, based on additive mixing of three colorants, is realizable at all, is it?
Perceptually uniform color spaces like the CIECAM02 or CIECAM97s appearance models, or CIELAB (only approximately uniform) are on the other hand usually based on a lightness/hue/chroma representation of the colors, so image manipulation algorithms designed for a trichromatic RGB representation cannot be applied to colors in these color spaces (e.g. in Photoshop you can use a CIELAB working space if you want an approximately perceptually uniform working space, but then you will notice, that many operations are either not available or behave differently than in RGB).
Regards, Gerhard
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