Compressing alt.sex.pictures files

[Don Lewis]

In article <1990Aug28.192024.22435 at zorch.SF-Bay.ORG> xanthian at zorch.SF-Bay.ORG (Kent Paul Dolan) writes:
>winans at sirius.mcs.anl.gov (John Winans) writes in news.admin:
>>HOWEVER:
>>What a.s.p might be good for is a place to test image compression programs
>>and stuff like that.  The acive users of the group would probably not want
>>to see it go away and might be willing to work with others to try to reduce
>>it's load on the net.
>
>Hmmm.  Good idea.  Here's one suggestion for an experiment.  Somewhere on
>the net, a month or two back, there was a suggestion that a good way to
>compress realistic images was to XOR scan lines after the first with their
>predecessor line, then LZW compress the output.

Taking differences between the scan lines instead of doing XOR's might
also be interesting.
--
Don "Truck" Lewis                      Harris Semiconductor
Internet:  del at mlb.semi.harris.com     PO Box 883   MS 62A-028
Phone:     (407) 729-5205              Melbourne, FL  32901