Re: Run-length encoding for image data?

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#7148

From: Chris Clarkson
Date: Mon, 09 May 1988 00:44

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In article <2387@uvacs.CS.VIRGINIA.EDU>, rwl@uvacs.CS.VIRGINIA.EDU (Ray Lubinsky) writes:
> Has anyone successfully implemented a run-length-encoding scheme for
> compressing pixel information sent to the image operator?  Several attempts
> I have made actually *increased* the processing time of large images on the
> Apple LaserWriter.  I'd love to here about a method for speeding up the
> throughput of images.  If you're interested in what I've tried, read on...

It has been tried here by our (former - he left to greener pastures) TeX and
Postscript guru Andrew Trevorrow. He found the same result. The whole thing
took *CONSIDERABLY* longer to process. He formed the opinion that it couldn't
be done to improve speed only make it worse. It apparently is tied up with
some interaction in the Postscript interpreter in the Lasewriter.

Chris Clarkson
chrisc@augean.oz

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References: <2387@uvacs.CS.VIRGINIA.EDU>

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!munnari!otc!metro!basser!natmlab!dmsadel!augean!chrisc
From: chrisc@augean.OZ (Chris Clarkson)
Newsgroups: comp.lang.postscript
Subject: Re: Run-length encoding for image data?
Message-ID: <325@augean.OZ>
Date: 9 May 88 00:44:12 GMT
References: <2387@uvacs.CS.VIRGINIA.EDU>
Organization: Elec. & Elect. Eng. Dept. University of Adelaide
Lines: 15
Summary: it has been tried here - it met with the same result

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