More than a year ago (two?) we had a discussion about this very thing - colour perception. Do we all see the same colours? Two people look at a coloured object; both agree that it's yellow-green. But do they actually perceive identically? I think we concluded that it didn't matter whether they did or not. There was mention of eyes and brains and all that stuff too. But I can't find the posts. They may be on a CD somewhere and I'll take a look later.
_______________ Dr E D F Williams http://personal.inet.fi/cool/don.williams Author's Web Site and Photo Gallery See New Pages "The Cement Company from HELL!" Updated: August 15, 2003 ----- Original Message ----- From: "Pat White" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 06, 2003 12:11 AM Subject: Re: Colour fidelity & low-light AF of *ist-D > D. Glenn Arthur wrote: > > First, Google for "anomalous reflectance". I've read about > the effect on film before, and apparently there are certain > fabric/dye combinations that are a real PITA for catalog > photography because of it. (Or maybe you don't have to, since > you already have a handle on the cause. But I found it > interesting reading the last time I dove into the subject.) > > > Anomalous reflectance sounds right, and it's not a problem with the film or > the sensor. A few years ago, I photographed a model wearing a > yellowish-green dress, which looked greenish-yellow on film. It might have > been the other way around, but the picture certainly didn't look like the > fabric. Some shades of purple are difficult for film to reproduce, or at > least to print the way our eyes see the color. Digital sensors will have > trouble with some parts of the spectrum, too. > > Human eyes don't even see everything the same, as you notice when you > disagree with someone over what color something really is. If your own two > eyes match each other, good enough. > > Pat White > >
