Using LAB as a colour correction

[Tony_photoplus]

Thanks to Tamlin's pic and links ref LAB colour in PS I seem to have been hooked and looked for ages for links on colour correction with LAB. I have found a few more links that those who did not see the discussion might be interested in. As you said Tamlin there is nothing better than Dan Marquilis's book. Maybe one day I will see it in a charity book shop at 50p. I also thought that possibly the concept could get more debated here.

Have had a few goes with different results, but here is a link with those discussions >>>

Photoshop Lab Color: Ch. 1 - Digital Grin Photography Forum

Photoshop LAB color: Chapter 14: "Once for Color, Once for Contrast" - Digital Grin Photography Forum

Look forward to any other links and discussions. it certainly has got me thinking and working on the concepts. Thanks Tamlin

Tony_photoplus

[Tony_photoplus]

Just another add on link using LAB mode

Sharpening images the pro way » Photoshop Ninja - Expert Photoshop tips and tricks

HALF-LIME Photo / Video

Tony_photoplus

[Tamlin]

That last link is quite interesting, and is a good example of how some photo-retouchers think that LAB mode is mainly used for sharpening - if you're changing to LAB anyway to do your sharpening, why not do the colour-correction there too? As Dan Margulis points out, LAB colour-correction isn't a cure-all for every photograph but with an image like the one shown, it would offer far more control (and be a lot quicker) than faffing about with channels and luminosity in RGB mode. You could even reduce the noise in LAB, too.

Sorry, I'm starting to sound a bit evangelical about LAB mode. I'll get my coat...

[Tony_photoplus]

I am trying to think, as the other day I saw an argument against LAB as they said it degraded the picture going from RGB to LAB and back again. Trying to find the link if I can. But, it certainly has changed my view and way to work. Always something that changes your view and ways of working. By the way, its not a coat its an anorak.

Tony_photoplus

[Sasha Cooper]

Originally Posted by tamlin

That last link is quite interesting, and is a good example of how some photo-retouchers think that LAB mode is mainly used for sharpening - if you're changing to LAB anyway to do your sharpening, why not do the colour-correction there too? As Dan Margulis points out, LAB colour-correction isn't a cure-all for every photograph but with an image like the one shown, it would offer far more control (and be a lot quicker) than faffing about with channels and luminosity in RGB mode. You could even reduce the noise in LAB, too.

Sorry, I'm starting to sound a bit evangelical about LAB mode. I'll get my coat...

I'm author of the tutorial on HALF-LIME. If you read Dan Margulis's later book Amazon.com: Professional Photoshop: The Classic Guide to Color Correction (5th Edition): Books: Dan Margulis, you will be surprised! Dan Margulis considers LAB mode correction as a "hammer" tool in color correction, and accurate RBG color enhancements and blending as the best choose if the original is tagged as RGB and destined to RGB color space. "Every photo has 10 channels" - Dan Margulis (the same book) )


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Sasha Cooper

[Tony_photoplus]

It great to hear another side, not having read the book only finding websites that extol the virtues of using this method. Thanks, I am sure that someone will give other arguments.

Tony_photoplus