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From: dmt@mtgzz.UUCP (d.m.tutelman)
Newsgroups: net.graphics
Subject: Re: Difference between Computer Graphics and Image Processing
Message-ID: <946@mtgzz.UUCP>
Date: Thu, 18-Jul-85 11:20:29 EDT
Article-I.D.: mtgzz.946
Posted: Thu Jul 18 11:20:29 1985
Date-Received: Sat, 20-Jul-85 02:27:05 EDT
References: <305@ur-laser.uucp> <823@turtlevax.UUCP> <113@usna.UUCP> <362@utastro.UUCP>
Organization: AT&T Information Systems Labs, Middletown NJ
Lines: 31
Cc: dmt

> > .....So, we get:
> > 1.	numbers -> computer -> image	(show me the line)
> > 2.	image   -> computer -> image	(anti-alias this image)
> > 3.	image   -> computer -> numbers	(what was that check number?)
> > 
> > For the net.graphics group, I think enough overlap in various areas
> > exist that a good number of the people will be subscribing to all
> > sub-groups.
> 
> Well, this categorization totally misses the operations astronomers refer
> to as image processing, where we are concerned with extracting quantitative
> values from digital images -- values which represent, in some way, the
> physics involved in the processes the images represent.  I suspect other
> disciplines do similar, but different, things.  I find the proposed
> categories too limited to be of much value.

Am I missing something?  It looks like a nice categorization to me, if
you don't mistake the example for the scope of the category.  The astronomical
problem is clearly (to me, at least) image->computer->number, or
IMAGE ANALYSIS.  OK, so it isn't ONE number.  But the essence of image
analysis is to go from the pixels to the ABSTRACTION of which they
are an image. Reading a check for text is only one such example.
Finding a person in a photo is another [harder] example.  But if you
read "number" to mean "semantics of the abstraction", this is a much
better system of nomenclature than the one I proposed a few days ago.
 
			Dave Tutelman
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