Re: Photoshop Gamut warning vs ColorThink
Re: Photoshop Gamut warning vs ColorThink
- Subject: Re: Photoshop Gamut warning vs ColorThink
- From: Steve Upton <email@hidden>
- Date: Thu, 21 Feb 2008 13:45:40 -0800
At 12:33 PM -0800 2/21/08, Chris Cox wrote:
>Yes, I'm still lurking.
good to know, thanks for responding.
>Without a useable gamut table, round trip deltas are the only way you can
>determine the gamut of the profile. Yes, it's not perfect and depends on
>the accuracy of the forward and reverse colorimetric tables in the profile
>-- but with the information available, that's the best you can get (AFAIK).
well, I respectfully disagree. I can see the reasons for choosing it but I think it is susceptible to unrelated flaws & color mapping in profiles. I'm happy to talk with you more offline about it...
Ultimately this means that the 'gamut warning' function is instead a 'significant delta-E' function. This may agree with gamut boundaries on some profiles but not on others.
>
>BTW - I don't believe Photoshop ever used the gamut warning tag, because we
>never found one that was accurate.
thanks for the confirmation. At one time I had considered graphing the gamut tag in addition to our gamut volumes but it seemed a cruel thing to do. Although I suspect it would have helped to put an end to the gamut tag's life long before now.
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
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