Re: Perceptual Javex
Re: Perceptual Javex
- Subject: Re: Perceptual Javex
- From: Steve Upton <email@hidden>
- Date: Sat, 23 Sep 2006 22:59:12 -0700
At 1:26 PM +1000 9/22/06, Graeme Gill wrote:
>eugene appert wrote:
>
>>Thanks for your answer. According to Colorthink this profile is a16 bit, 25 grid point table based profile, L*a*b* PCS Lut. Colothink also describes it as a scnr type, I am not sure what that means.
>
>It means that the profile class is an input profile.
>
>> Though it
>>shows a white and black point of L*0 and L*100 in the devise color space area , it describes the PSC white point as 0,9462, 1,,08249 in ICC technical attributes. However under the tag table tab, it describes the media white point as:
>>
>>XYZ: 0.9640808, 0.9999847, 0.8248901
>>Lab: 100,, -0,03, 0,02
>>LCH: 100, 0.04, 154.72°
>>Yxy: 1, 0.35, 0.36
>>Luv: 100, 0.21, 0.49
>>5000°K
>
>It sounds to me like Colorthink is showing the relative colorimetric
>white point, not the absolute white point.
it should be simply showing the contents of the wtpt tag rather than the results of a transformation...
> ICC relative colorimetric
>white is defined as being D50, so it's not telling you anything useful.
well the usefulness of a number is a very different issue indeed...
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o upton(at)chromix.com 206.985.6837
________________________________________________________________________
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