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From: johnmark@neon.Stanford.EDU (John M. Agosta)
Newsgroups: comp.lang.postscript,comp.dcom.fax
Subject: Re: Compression of image matrices
Keywords: images, data compression,
Message-ID: <1991Mar7.232938.3565@neon.Stanford.EDU>
Date: 7 Mar 91 23:29:38 GMT
References: <11757@pasteur.Berkeley.EDU>
Organization: Computer Science Department, Stanford University, Ca , USA
Lines: 22

Heinz W. Schmidt, hws@icsi.berkeley.edu, writes, about sending
compressed images to postscript printers:

>> Before we start writing anything, has anybody ever done something like that?
>> Especially is there a postscript program to decode fax Group3 encoded
>> bitmaps?     

Adobe has. The "level 2" spec for postscript includes both binary
compressed transmission to the printer, and fax images. These are
implemented as "filters."  "CCITTFaxDecode" produces binary data
from fax encoded data. Likewise "DCTDecode" works with a JPEG standard.
I think I have seen ads for level 2 printers, but you'd have to 
check about availability. 

.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.
John Mark Agosta   		      internet: johnmark@neon.stanford.edu
Robotics Lab				     
				         voice: 415/723-1143
P.O. Box 4847			     voicemail: 408/441-1166 x4547
Stanford, CA 94309

"So much uncertainty, so little time."