I was wondering; if you change color mode from rgb to lab, and then back again, will there be any changes in the colors? It wont be much of course, I mean that a color could be rgb 116,213,212 first and it would change to 117,213,212 or whatever...
from what I understand, with the newer versions of PS, you can safely change back and forth between RGB & Lab without degradation. Going to cmyk is a different story.
I've just tested it by flipping back & forth between Lab and rgb once with a copy of the background. Then changed the top layer mode from 'normal' to difference. I then flattened the (almost completely dark) image and used levels on it, and unfortunately yes.... there is a difference :(
Btw, when doing this on a 24 bit picture, and changing it to 16 bits/channel before changing color modes, and then changing back afterwards, the difference is a lot less; but still it is a bit destructive, especially when doing this multiple times, I guess. I've tested it on CS, have to do it at home on CS3, to see if that works better...
Thats TRUE, but... you don't need to sharpen all channels in any color mode (RGB, CMYK, LAB)
PS Using LAB we can clean color noise easy without contrast loss :-)
Just blur A abd B channels
leszken 4 years ago
I was wondering; if you change color mode from rgb to lab, and then back again, will there be any changes in the colors? It wont be much of course, I mean that a color could be rgb 116,213,212 first and it would change to 117,213,212 or whatever...
omega6667 4 years ago
from what I understand, with the newer versions of PS, you can safely change back and forth between RGB & Lab without degradation. Going to cmyk is a different story.
chbphoto 4 years ago
I've just tested it by flipping back & forth between Lab and rgb once with a copy of the background. Then changed the top layer mode from 'normal' to difference. I then flattened the (almost completely dark) image and used levels on it, and unfortunately yes.... there is a difference :(
omega6667 4 years ago
Btw, when doing this on a 24 bit picture, and changing it to 16 bits/channel before changing color modes, and then changing back afterwards, the difference is a lot less; but still it is a bit destructive, especially when doing this multiple times, I guess. I've tested it on CS, have to do it at home on CS3, to see if that works better...
omega6667 4 years ago
especially much damage to the blue channel, I noticed. Sometimes as much as 4 numbers of difference!
omega6667 4 years ago