Re: source for metamerism target
Re: source for metamerism target
- Subject: Re: source for metamerism target
- From: email@hidden
- Date: Mon, 1 Apr 2002 09:47:00 EST
In a message dated 4/1/02 9:02:43 AM, email@hidden writes:
>
I remember having seen a perfectly metamer target/swatch a while ago
>
but I cant remember or find the source anymore (GretagMacbeth,
>
X-Rite, GTI lightbooth,...?)
GATF has a small purple target that is evenly colored under D50, but shows
stripes under other light colors, if that is what you mean. Its interesting
to measure the two materials on it with a spectro, and compare the match from
spectral data in software that considers the spectral data, not just a Lab
value. This shows equivalent values (delta E of nearly 0) at D50, and
increasing delta Es at light sources further from D50.
C. David Tobie
Design Cooperative
email@hidden
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