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From: amyjo@ames.UUCP (Amy Jo Bilson)
Newsgroups: net.graphics,net.ai
Subject: NASA seminar
Message-ID: <1343@ames.UUCP>
Date: Fri, 17-Jan-86 12:39:21 EST
Article-I.D.: ames.1343
Posted: Fri Jan 17 12:39:21 1986
Date-Received: Mon, 20-Jan-86 03:40:09 EST
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Organization: NASA-Ames Research Center, Mtn. View, CA
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Title: Image processing by constant volume operators.

Speaker: John I. Yellott, Jr.

Affiliation: University of California, Irvine.

Time and date: 2 PM, Thursday January 23, 1986.

Place: Life Sciences Bldg. 239, Conference Rm 177.

Contact: A. Ahumada, x6257, Mail Stop 239-3.

Abstract: A class of image processing operators is described which
can take images with a large variation in quantum catch per pixel
and produce output images with a relatively constant signal-to-noise
ratio per pixel.  These simple operators automatically provide
spatial summation for noise reduction at low signal levels and
high-pass filtering for signal compression at high signal levels.
These operators are shown to obey several basic psychophysical
"laws" of the human visual system.