Posted: Tue Nov 21, 2006 2:48 pm Post subject: i get, "embedded profile mismatch" warning.
it happens whenever i open any image in cs2. i went to google and got tons of advice regarding color management, but nothing about this warning and how to deal with it. i'd like to open images without having to go through this every time. also, i can't batch actions this way. thanks, boyd.
This basically happens because your colour profiles mismatch - but this you know already. According to your post, you should also know why they mismatch. For those who do not know, here is a brief explanation:
There are many different colour profiles, each with it's own pro's and cons. The reason for many different profiles is because not all profiles cover the same gamut. A gamut is the colour space available to a profile like CMYK or RGB. This simply means that CMYK (printing colours) can reproduce most, but not all, and in some areas more, colours than the RGB (on-screen colours) can and vice versa (i.e. the gamuts overlap but is not identical). This is simply due to physical constraints between the additive (RGB) and subtractive (CMYK) colour models.
Now, there is also an sRGB and Adobe RGB. sRGB was developed for the web in mind - have most colours neccesary to render images fairly photo-realistic, but not all the colours. Adobe RGB has a wider gamut - especially in the green region and is therefore better for photography purposes. Lab colour space have the most info, but is generally too wide for conventional printing. See image...
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Anyway, each of these colour models or profiles have different sub settings which are highly technical. Photoshop notices the difference when you open these, and warn you of them, unless you tell it not to. The reason it warns is that if you have sensitive colour info, they will get distorted if you do not keep the same profile.
To turn it off, go to: Edit > Colour Settings (CTRL+SHIFT+K), and deselect the option "Ask when opening" under Profile Mismatches.
The best profile for the general PS user (99.9% of you) is most probably as follows:
Settings: Custom
RGB: Adobe RGB (1998)
CMYK: U.S. Web Coated (SWOP) v2
Gray: Dot Gain 20%
Spot: Dot Gain 20%
Remember to set your camera's profile to the same as your PS!
Not many photo labs have their Frontier's set up to print Adobe RGB, and they print in sRGB. if this is the case, it is useless for you to work in Adobe RGB, as the extra colour info will get lost in the down filtering anyway. But if you can find a lab that does work with Adobe RGB - better for you!
Also, don't give the labs CMYK. Also not your home printer, as most drivers assume you are sending the image in RGB, and it recalculates accordingly.
Do not worry too much about these anyway. Unless you work in the priting profession in the likes of high-flying glamour / gloss magazines, you, or your clients will most probably never notice the difference.
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