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Tue, Apr 19, 2011 10:35 PM


Lightroom/Camera Raw: HSL Luminance Constraint

Presently, we can adjust hue, saturation, & luminance: constrained by hue (the 8 different HSL colors).

I'd really like to be able to constrain HSL adjustments based on luminance range too. A saturation constraint would also be nice, or even the ability to fine tune the hue constraints, but a luminance constraint would also be very useful.

- Increase the saturation of the lightest purples, without affecting the darker purples.
- Decrease the luminance of the lightest yellows, without affecting the already dark yellows...
- Shift the hue of the darker aquas, without affecting the lightest aquas.

I use split-toning a lot to make luminance based color adjustments, but its too limiting - it *only* discriminates luminance (*all* hues are altered).

Likewise, I sometimes tweak shadow tint, but its also a poor substitute for luminance discriminating HSL adjustment.

PS - RGB curves would also be welcome, as would integrated DNG color profile technology, but the addition of a luminance constraint to the existing HSL tool would be a step in the right direction.

Note: this idea can be canceled if better masking invented (to support local adjustments) - since if one can define masks to select any color/luminance ranges, and then tie an HSL adjustment to it, the luminance constraints on the HSL tool would be essentially redundent - this is more of a backup idea - I'd like better color control, somehow.


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