On Monday, June 9, 2003, at 11:06 am, michael shaffer wrote:
I have heard of the occasional task, for which "filtering" one of the Lab
channels was of some help, but I haven't heard of any advantage of using Lab
for tonal or color adjustments.
A disadvantage would be 2 additional color conversions, but this might be
somewhat dependent on the version of Photoshop.
Is selecting mode LAB a colour conversion? I understand that it is the same information as RGB but dealt with in a different way. I've just tested a few multiple conversions, LAB and CMYK, and LAB conversions don't seem to show the deterioration that CMYK obviously does.
There was a query on another list a week or so ago about achieving a certain type of colour effect. I can't find the exact description but from memory it was that type of full colour, not-quite-duo-tone, with one overall colour emphasis but with highlights still clear. Hard to do in RGB alone but I just tried in LAB and it came close easier.
Bob Croxford
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