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From: alan@cogswell.Jpl.Nasa.Gov (Alan S. Mazer)
Newsgroups: comp.arch
Subject: Re: Resolution, etc.
Message-ID: <1990Nov23.204238.12597@elroy.jpl.nasa.gov>
Date: 23 Nov 90 20:42:38 GMT
References: <240@csinc.UUCP> <1990Nov15.052925.1265@imax.com> <1990Nov23.182147.26688@zoo.toronto.edu>
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In article <1990Nov23.182147.26688@zoo.toronto.edu>, henry@zoo.toronto.edu (Henry Spencer) writes:
>In article <4027@osc.COM> jgk@osc.COM (Joe Keane) writes:
>>Quantization of display colors is a small problem, since you can use dithering
>>to get what you want...

>I'd also note that for some classes of images, like scientific visualization,
>it is not acceptable to mess with the pixels to make it look better.

Absolutely, which is why we don't use dithering around here.  It's bad enough
having to do the quantization, but if we dithered, individual pixels would be
almost useless.  Dithering is fine if you want to make pretty pictures, but 
if you are actually using the picture for something analytical you lose a lot
of information.
-- 

-- Alan			       # My aptitude test in high school suggested that
   ..!ames!elroy!alan	       # I should become a forest ranger.  Take my
   alan@elroy.jpl.nasa.gov     # opinions on computers with a grain of salt.