Re: a link to some interesting illusions

[Bernard Cleyet <anngeorg@PACBELL.NET>]

I forgot to mention that at least one of the originally posted referrals
(optical illusions) are  on permanent display (at least a year anyway) at the
Exploratorium.  They recently showcased "Seeing" which dealt with some of this
thread's discussion.  I recommend the Exploratorium highly and have not noticed
any "physics errors".

preview:  http://www.exploratorium.edu/seeing/about/collection.html

evidently current!

bc

John Clement wrote:

> > Stating that the eye-brain system perceives color independently of
> > illumination is in general false (although it is true in various
> > situations). This can be easily proved by anyone who has bought an article
> > of clothing in a store and then noticed that the color appears very
> > different when taken outside.
> However the idea that the 3 color additive model predicts the color seen, is
> also false.  The 3 color additive model works well for color television and
> for photos, but has great difficulty with real life situations.  If you go
> to http://www.hhmi.org/senses/b140.html you will see the following text
> -----------------------------------------
> "Color constancy is the most important property of the color system,"

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