Re: metamerism and metameric color - more
Re: metamerism and metameric color - more
- Subject: Re: metamerism and metameric color - more
- From: neilB <email@hidden>
- Date: Fri, 22 Jun 2001 12:12:22 +0100
Roberto
On 21-6-01 at 5:46 PM, email@hidden (Roberto Michelena) wrote:
>
So the thing is, "two printed patches produce two reflected
>
spectras under illuminant #1, and these spectras are metameric
>
because they produce the same color stimuli (tristimulus
>
values); then the same printed patches produce two other
>
reflected spectras under illuminant #2, and these spectras are
>
not metameric because they produce different color stimuli."
>
>
Is that clear, or what?
yes
nice description
can we then call the behaviour under varying illuminants of these
two patches a kind of "metamerism"?
And can we extend that permission to use the term to describe the
behaviour in differing illuminants [ie uneven alterations in
apparent colour caste] of a grayscale wedge [ essentially a
large number of tonally varying patches, which all appear to be
neutral gray in a lightbox]. I suggest that we are in practice
comparing these to an idealized [caste free] grayscale, whether
it is present or not - so, are we stretching the term metamerism
too far to use it to suggest this behaviour in, say , inkjet
printers?
Or am I being dim and I missed the point [ask my wife - it happens].
neilB
Neil Barstow Colour Management Consultancy Services
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