Re: Neutral grey under different lighting
Re: Neutral grey under different lighting
- Subject: Re: Neutral grey under different lighting
- From: Randy Norian <email@hidden>
- Date: Sun, 9 Sep 2007 10:17:01 -0500
While Roger's point may theoretically be possible (ie: objects that
happen to respond the same under a variety of specific illuminants,
but do not correspond at other wavelengths), if two objects match
"under all illuminants", then you have pretty much defined them as
having the same spectral response across the board.
In which case, it would seem very likely that they were made/
pigmented with the same stuff (note my highly technical jargon)
I'd say Marco's theory would hold!
Randy Norian
On Sep 9, 2007, at 9:48 AM, Roger Breton wrote:
Marco,
It would seem to me that if two colored objects match under all
illuminants,
they are very likely to match spectrally too, which also makes it
highly
likely that they are made from the same, or very similar,
materials and
pigments.
Well, I'm not so sure. I remember hearing about industrial color
formulation
used in textile, for instance, where the choice of "ingredients"
was such
that it minimized metamerism. So, I am tempted to hypothesize in
view of my
limited knowledge that it's possible to have two color surfaces
match under
a variety of light sources yet they don't exhibit the same spectral
reflectance.
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