Re: Just Normlicht vs. Graphiclite or GTI
Re: Just Normlicht vs. Graphiclite or GTI
- Subject: Re: Just Normlicht vs. Graphiclite or GTI
- From: Steve Upton <email@hidden>
- Date: Thu, 5 May 2005 15:34:40 -0700
At 6:13 PM -0400 5/5/05, stevej wrote:
>And if you load these four spectra(as read with an i1) into the
>i1Share app you'll see why all this happens. Load the 2 RHEM
>colors into "Evaluate:Accuracy" reference and sample circles.
>Then load the 2 light sources(GTI and JUST) into "Evaluate:Light";
>sample 1 and sample 2.
>
>Since RHEM strips are especially susceptible to red metamerism
>and the JUST tubes have a sharp drop beyond 650nm, you've
>got metamerism even though the JUST lights DO have a
>higher CRI. Go figure...
true but this only shows the difference between the illuminants, not the correctness of one over another.
A better test would be to compare each of them to the D50 illuminant (where the CRI number comes from) and see which one is closer....
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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