Comments on: Multiply mix LAB vs RGB

By: Commentor

Commentor — Wed, 25 Mar 2009 04:31:31 +0000

1. To get a green when you multiply blue and yellow both the blue and the yellow must have a healthy amount of green in them to begin with — same as with real paint.

http://www.digitalartform.com/archives/images/psColorMixing_1.jpg

2. ‘Subtractive’ color mixing is really based on multiplication, not subtraction. Take the C, M, Y, (and K, if you have one) channels and make them into layers. What blend mode must you use to combine them all into a correct image? Difference? No. Exclusion? No. Mutiplication? Yes, sir.

3. An RGB monitor emulating Lab is no more unusual than a Linux machine emulating Windows.

By: administer

administer — Tue, 27 May 2008 14:06:22 +0000

administer says : I absolutely agree with this !

By: rightthere

rightthere — Tue, 22 Apr 2008 20:22:56 +0000

It’s interesting to see what happens when a monitor (which essentially can only work in the RGB colour space) tries to figure out the LAB gamut…

By: cybernetic nomad

cybernetic nomad — Sun, 11 Mar 2007 13:51:33 +0000

“Then the same test done with blue vs yellow, to my suprise, the RGB version mix are all grey!!”

This is normal, Yellow and Blue are opposites on the colour wheel whereas Red and Green are not.