[net.graphics] Compression techniques for images.

msp@ukc.UUCP (M.S.Parsons) (10/26/84)

:-)

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.