🚀 go-pugleaf

In article <BxIAy0.3Mu@dcs.ed.ac.uk> cdw@dcs.ed.ac.uk (Christopher Walton) writes:
>Has anyone got any C source for fractal compression or are we all
>just crying out in vain? Please send me some if you do!
>
crying out in vain, methinks...
>Thanks - Chris (cdw@dcs.ed.ac.uk)
>         "all in the name of ..."
the only working group doing anything about fractal compression as far as
I know are the originators, Barnsley et. al.... (correct me if I'm wrong)...

don't think they're up to releasing source code though, heh... they've got
a company (Iterated Systems) to cash in on their research stuff...

however, don't bet on anything substantial coming up...in the past 5 years,
nothing much has been done, though I've heard here and there about some sort
of compression standard and commercial software based on it...

_BUT_ the kicker is that fractal compression is not the holy grail nor panacea
they thought it would be ... even Barnsley's fantastic figures that got
everybody excited in the first place used algorithms that were hand-fudged -
the Collage Theorem doesn't work too well with computers...

anyway, the image quality leaves a lot to be desired... 

the decompression routines are easy to code...

it's the compression one that's a bitch and a half - i.e. the collage theorem
and buddies... blecch...

don't look for any freebies here guys...first person to make it really work
gets all the dough...

though IMHO it'll take more than a long while.

Sean. fractal compression? like beating someone with the mandelbrot set?



--
-----
Sean Chen.  hhc@athena.mit.edu
"Nunc in scutella iaceo,/et volitare nequeo,/dentes fredentes video./Miser!"
  Olim lacus colueram, _Carmina Burana_

In article <1992Nov14.173749.1842@ccsvax.sfasu.edu>, z_youngwd@ccsvax.sfasu.edu writes:
|> In article <1992Nov12.013337.9851@athena.mit.edu>, hhc@athena.mit.edu (Hong-Hsiang Chen) writes:
|> > In article <BxIAy0.3Mu@dcs.ed.ac.uk> cdw@dcs.ed.ac.uk (Christopher Walton) writes:
|> >>Has anyone got any C source for fractal compression or are we all
|> >>just crying out in vain? Please send me some if you do!
|> >>
|> > crying out in vain, methinks...
|> >>Thanks - Chris (cdw@dcs.ed.ac.uk)
|> >>         "all in the name of ..."
|> > the only working group doing anything about fractal compression as far as
|> > I know are the originators, Barnsley et. al.... (correct me if I'm wrong)...
|> 
|> OK.  You're wrong.  There are several groups of people worldwide working on
|> this problem. 
|> 
|> > don't think they're up to releasing source code though, heh... they've got
|> > a company (Iterated Systems) to cash in on their research stuff...
|> 
|> Correct.  That's why so many people have been quietly developing _working_
|> algorithms on their own.
|> 
|> > however, don't bet on anything substantial coming up...in the past 5 years,
|> > nothing much has been done, though I've heard here and there about some sort
|> > of compression standard and commercial software based on it...
|>  
|> Iterated Systems has released a commercial product.
|> 
|> > _BUT_ the kicker is that fractal compression is not the holy grail nor panacea
|> > they thought it would be ... even Barnsley's fantastic figures that got
|> > everybody excited in the first place used algorithms that were hand-fudged -
|> > the Collage Theorem doesn't work too well with computers...
|> 
|> I agree with statement about Barnsley's fantastic figures... but, personally
|> the Collage Theorem serves only as motivation.
|> 
|> > anyway, the image quality leaves a lot to be desired... 
|> 
|> Where did you get this info from?  Have you seen any working demos?
|> If not, why not?  There are 2 posted at lyapunov.ucsd.edu 
|> 1) /pub/inls-ucsd/fractal-2.0.tar  <-- Yuval Fisher's, PS paper and code.
|> 2) /pub/young-fractal  <-- mine.  old, but will be updated soon.
|>  
|> > the decompression routines are easy to code...
|>  
|> Correct.
|> 
|> > it's the compression one that's a bitch and a half - i.e. the collage theorem
|> > and buddies... blecch...
|>  
|> Its not that bad... but close. :)
|> 
|> > don't look for any freebies here guys...first person to make it really work
|> > gets all the dough...
|> 
|> I've posted some source that together with the paper in /pub/inls-ucsd
|> will make the algorithm easier to understand. 
|>  
|> > Sean. fractal compression? like beating someone with the mandelbrot set?
|> 
|> Cute.
|> 
|> 
|> I noticed you are at mit.  I imagine X is a BIG thing there huh?  I have
|> some decompression code for X-windows that I'll send you if you wish.
|> 
|> Enjoy.
|> 
|> Wayne Young
|> z_youngwd@ccsvax.sfasu.edu
|> 
|> 

I HAVE a demo di Iterated Systems on their fractal compression program!
It does work, is fast but, obviously there's no source code with it :-)

Arrigo

-- 
Arrigo G.B. Triulzi (a.triulzi@imperial.ac.uk)
Mathematics Dept. - Imperial College of Science and Tech. - London - UK