Re: Dumb question - Printing Colorchecker
Re: Dumb question - Printing Colorchecker
- Subject: Re: Dumb question - Printing Colorchecker
- From: Steve Upton <email@hidden>
- Date: Wed, 26 Oct 2005 22:48:40 -0700
At 3:52 AM +0200 10/27/05, edmund ronald wrote:
>Roger, in the mean time, Danny Pascale has confirmed that my spectral
>values and LAB values match the colorchecker tiff aRGB file that I
>tried to print. Apart from one square (blue) which may be a
>manipulation mistake.
>
>Now how do I print this thing ? The colors look in-gamut when viewing
>the profile. Why do the neutral square go blue with abs col and stay
>neutral with rel col ? I don't get it ...
The big difference is that Adobe RGB has a blue white point so abs col reproduces the blue white point in the output space. Lab has a D50 white point which doesn't.
So, using Lab values with abs col is much more likely to give you the results you want.
Also, are you measuring or viewing to find the difference? If viewing, make sure you don't have an odd white surround casting everything.
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
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