Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 5/3/83; site ukc.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!mcvax!ukc!msp From: msp@ukc.UUCP (M.S.Parsons) Newsgroups: net.graphics Subject: Compression techniques for images. Message-ID: <4447@ukc.UUCP> Date: Fri, 26-Oct-84 12:15:18 EDT Article-I.D.: ukc.4447 Posted: Fri Oct 26 12:15:18 1984 Date-Received: Sat, 20-Oct-84 07:36:39 EDT Organization: Computing Lab. Kent University, England Lines: 15 :-) Here at Kent University, we encode images using both quadtree and run-length codings. The amount of compression due to these techniques is usually about the same, in the order of 30-80 %. On top of this we use a standard compression utility, either compact or compress (the latter is rather better). The resulting file is often 80-95 % smaller than the original raster, (very dependent on image type, though). Mail me if you want more details, ------------------------------------------------------------------------------- Mike Parsons UUCP: {edcaad,qtlon,ucl-cs,mcvax,vax135}!ukc!msp ARPA: MSP%UKC@UCL-CS.ARPA Mail: Computing Lab, University of Kent, Canterbury, England.