Compressing alt.sex.pictures files

[Peter da Silva]

In article <1990Aug28.192024.22435 at zorch.SF-Bay.ORG> xanthian at zorch.SF-Bay.ORG (Kent Paul Dolan) writes:
> 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.

I believe that XORing alternate scan-lines and run-length-encoding the result
would do a better job. I've heard of this algorithm being pretty effective
in past discussions. Should one do this with the image bitplane-mapped or
pixel-mapped?
-- 
Peter da Silva.   `-_-'
<peter at sugar.hackercorp.com>.