Re: Neutral grey under different lighting
Re: Neutral grey under different lighting
- Subject: Re: Neutral grey under different lighting
- From: Marco Ugolini <email@hidden>
- Date: Sun, 2 Sep 2007 23:47:25 -0700 (GMT-07:00)
On Sep 2, 2007 6:27 PM, Scott Martin wrote:
> Metamerism aside, photo paper gray should be very nice.
Here is another one of my periodical reminders:
*Metamerism* is the effect whereby *two* colored objects built with colorants of different spectra appear to match one another colorimetrically under a given illuminant. It's a *positive* effect, not one that should be avoided. Without metamerism, the only way to match a target color would be to create it with exactly the same pigments and materials.
On the other hand, the phenomenon whereby a colored object changes appearance under different illuminants is called *color inconstancy*.
This distinction may seems like nitpicking to some, given how used we have become to hearing "metamerism" used in place of "color inconstancy" even from people who ought to know better -- but it's not, since the two expressions actually indicate two sharply distinct phenomena.
Best.
Marco Ugolini
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