RE: [WM]: nonlinearity in visual perception

["Madan Ankapura" <micromysore@gmail.com>]

Henry,
I guess, you are searching for "weber's law"
http://www.usd.edu/psyc301/WebersLaw.htm
should get you started .. 

-madan


-----Original Message-----
From: watermarking-owner@watermarkingworld.org
[mailto:watermarking-owner@watermarkingworld.org] On Behalf Of Henry Sonnet
Sent: Wednesday, May 04, 2005 12:38 AM
To: watermarking@watermarkingworld.org
Subject: [WM]: nonlinearity in visual perception

Hello,

I'm interested in the field of human color perception. The correlation between the brightness of a color and how one perceives
slight color differences is non-linear. The brighter a color the earlier differences can be detected.

There is an article that seems to address this aspect, but I can not find it on the web:

G. Buchsbaum: "An analytical derivation of visual nonlinearity". IEEE Trans.
on biomedical engineering, Vol. 27, pp. 237-242, 1980.

Could someone please send me this article or suggest (send) other articles related to this topic?

Thanks in advance,

Henry Sonnet



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