Topic awaiting preservation: Much better raw hues with stock (Page 1 of 1)

I think I finally got my uber hue extraction technique.
In all of the other techniques that I've babbled about, negating the RGB/Lum weighting has been imperfect.
Have to negate in two parts: invert + hue.

Because it's stock tools, should work across the board, maybe even with 16 bit.

blah blah blah

1. Copy photo
2. Invert the copy
3. Set blending mode to Luminosity and bring opacity down to 50%
4. Clip a Hue/Sat Ad-Layer and use Hue +180
5. Another Hue/Sat Ad-Layer, not clipped, and Sat +100

In my tests, percent error hasn't been over 1/255.
Very not bad.

edit:
Damn it!
Seems to choke with super low sat values.
:sigh:
~bangs head against chaulk board~

edit2:
Seems to be only when Sat=1.
Because the anomoly is showing as 63 - 191 for Sat=1, I think it's just a rounding problem for 1.
Rounding would also explain 1 - 254 (either, but not both).

(Edited by warjournal on 04-21-2005 15:46)

(Edited by warjournal on 04-21-2005 15:52)

Instead of copy and invert, use Ad-Layer > Invert set to Lum and Opacity=50%.
This will make it non-dependant.
For example, you could toss it all into a Layer Set and drag-n-drop it around.
Would also help in recording an Action that is more universal, so to speak.

meh