At 1:34 PM +0100 9/27/05, Steve Kale wrote:
>Hi guys - I hope this question makes sense and is on-topic.
>
>If I were to print and measure a colour test target on non-white (eg light pink) paper and then ICC profile this, what colour would a 100% white page appear in a Photoshop soft proof with this profile WITHOUT Simulate Paper Color checked? White?
monitor white, yes
>When writing A2BO tags, my understanding is that the measured data is luminance scaled to be media relative. How are the a* and b* components scaled (if at all) or rather how should the measured data be scaled such that L*, a* AND b* are scaled properly?
the scaling happens in XYZ and happens on all three coordinates. Subsequently the derived Lab values will be scaled as well. You can find out more in the appendix of the ICC spec.
Regards,
Steve
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o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
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o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
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