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From: jss@sjuvax.UUCP (J. Shapiro)
Newsgroups: net.ai
Subject: Re: Re: An Image Format Standard
Message-ID: <1211@sjuvax.UUCP>
Date: Thu, 25-Jul-85 23:02:20 EDT
Article-I.D.: sjuvax.1211
Posted: Thu Jul 25 23:02:20 1985
Date-Received: Sun, 28-Jul-85 08:24:33 EDT
References: <519@wdl1.UUCP>
Organization: Haverford College, Haverford, Pa.
Lines: 18

> 
>      Take a good look at the standards for facsimile transmission, such as
> CCITT group III and IV FAX compression standards.  This territory is well
> covered.
> 
> 					John Nagle

This things are great for black and white, but it is not clear to me tha
they cover color. In addition, even if all you want to do is move images
as pixel/intensity/color data, the compression achieved bu IV FAX is
a joke.

Finally, neither of these (to my knowledge) facilitates the transmission
of pictures which are _described_ more easily than they are transmitted.
For example, a circle inside a triangle would clearly transmit more effi-
ciently as graphics commands than as a bit image.

Jon Shapiro