Re: Proof Colors in Photoshop
Re: Proof Colors in Photoshop
- Subject: Re: Proof Colors in Photoshop
- From: Andrew Rodney <email@hidden>
- Date: Fri, 02 Aug 2013 20:00:25 -0600
On Aug 2, 2013, at 7:49 PM, Mark Stegman <email@hidden> wrote:
> As for the tip... I don't know when the gamut warning wasn't in Photoshop but it's pretty ugly. If my memory serves me right Andrew thought that they should get rid of it at one stage and just rely on Proof Colors. Perhaps they could implement a version that generated a sort of transparent, posterised overlay based on just how far out of gamut the affected colours are. Personally, I'd rather use a colour space I can actually see.
The "problem" with the OOG overlay is seveal fold. First, it could be a tad more accurate. For example, depending on image content, you can ask Photoshop and Lightroom to show you OOG colors on an sRGB document using sRGB and you see some overlay. That shouldn’t happen but the amount of overlay is usually pertty small. Still, one would expect perfection <g>.
2nd, OOG treats a color that's a tiny bit OOG the same as a color that's way out of OOG. It would be useful if you had some better visual indication of what's OOG enough to be concerned.
3rd, you've got an ugly overlay over your image. Just what are you suppose to do now? The profile you conver TO will deal with this but as Steve pointed out, with simple matrix profiles, you've got no perceptual mapping options. I don't know why it's so 'difficult' to build profiles to provide this, there is an sRGB V4 profile that does and yes, depending on the image, you can find it's perceptual mapping visually superior.
Frankly, in light of many color management issues we have these days, this doesn't seem to be a major one IMHO.
Keep in mind the OOG overlay is really old, predating Photoshop 5 when modern ICC color management was introduced, including soft proofing. In the old days, the idea was, take the sponge tool set to desaturate and rub over the overlay until it disappears and you've got the image 'in gamut'. Soft proofing and viewing the differences in rendering intents, when available seems far more useful and sophisticated. That isn't to say a OOG overlay for the 21st century wouldn't be nice to have in addition.
Andrew Rodney
http://www.digitaldog.net/
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