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From: avi@hpcehfe.UUCP
Newsgroups: comp.graphics
Subject: Gamma Correction of Monitors
Message-ID: <880002@hpcehfe.HP.COM>
Date: Mon, 16-Nov-87 12:46:11 EST
Article-I.D.: hpcehfe.880002
Posted: Mon Nov 16 12:46:11 1987
Date-Received: Thu, 19-Nov-87 05:51:03 EST
Organization: Hewlett-Packard Corporate Engineering Human Factors
Lines: 47

I am interested in finding out what techniques people use (or know about)
to perform monitor 'gamma correction'.  In particular, does anyone have a
method to linearize screen luminance without a photometer (or similar
measuring device), but simply with some visual task which is independent
of the display hardware.  A matching task using true gray in one field
and a dither pattern of black and white pixels in the other will not
necessarily work, since there's no gaurantee that turning on half the
pixels (for example) will generate a luminance reading halfway between
min and max.  In fact, different layouts of the black and white pixels
can lead to significantly varying luminance readings.

Other than general coverage in computer graphics texts, I have found only
three useful references addressing this topic (see below).  Pointers to
articles or tutorials (for color or monochrome) are appreciated.

%L Catm79
%A E. Catmull
%T A Tutorial on Compensation Tables
%J Computer Graphics
%V 13
%N 2
%D August 1979
%P 1-7
%O SIGGRAPH 1979 Proceedings.

%L Cowa83
%A W. B. Cowan
%T An Inexpensive Scheme for Calibration of a Colour Monitor in Terms of CIE Standard Coordinates
%J Computer Graphics
%V 17
%N 3
%D July 1983
%P 315-321
%O SIGGRAPH 1983 Proceedings.

%L Mart87
%A D. Martindale
%A D. Kochanek
%T Quality Film and Video Output for Computer Graphics and Animation
%R CHI+GI 1987 Tutorial Notes
%D April 1987

Avi Naiman
Hewlett Packard & University of Toronto
(415) 857-6310
avi%hpcea@hplabs.hp.com
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