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|Wavelet Compression Replies
|Licinda Woudberg, University of Otago, New Zealand
|Posted: Fri Nov 29, 2002 2:27 pm
Subject: Wavelet Compression Replies
|Wavelet Compression Replies
% Note for the editor: This is a summary of the replies on the
% submission "Looking for compression software", Topic #5 of
% Wavelet Digest Vol. 1, Nr. 10.
Firstly I would like to appologise for taking so long to
reply. I have managed to find some information and contacts
regarding Wavelet compression - techniques and software, and similar
The following is a reply I received from Victor Wickerhauser
(Washington University). Victor has written a number of papers on
Wavelet compression (mainly using the Best Basis alogorithm) partly
as a result of a FBI project to digitise finger prints for computer
recognition. I am sure you can appreciate the quality of information
that must be retained through a lossy compression. The reply is
regarding wavelet compression papers by Victor. pic.tar.Z can be
obtained through anonynous ftp from ceres.math.yale.edu
[184.108.40.206] (I think!)
From: IN%"email@example.com" 11-DEC-1992 14:43:54.76
> But you can get a much better and more recent paper from wuarchive
> (see below), namely dsp.ps.Z (compress'ed postscript, 300-400dpi
> fonts). pic.tar.Z is a highly preliminary paper which discusses
> how much > distortion it costs to discard a certain fraction of the
Some of Victor's software (the binaries) is also available through
ftp from wuarchive (wuarchive.wustle.edu [220.127.116.11]). It is
called WPLab and is good for examinign how wavelets work. To obtain
the code involves entering into a non-disclosure agreement. The
binaries are avaliable for both the NeXT (in Objective-C) and for the
The following is a reply I received from Eero P. Simoncelli, who has
also written some papers on Wavelet compression.
From: IN%"firstname.lastname@example.org" 21-JAN-1993 05:06:20.08
> Dear Licinda,
> I saw your message on the wavelet digest a while back. I wrote a
> public domain wavelet coder called EPIC that is very efficient.
> Source code is in C. It currently only works on grayscale (8bit)
> square images, but I have used it to compress color images by
> converting them from RGB to YIQ and encoding the three images
> I'm including the README file below. Hope you'll find it useful.
% Note from the editor: I didn't include the readme file here, but it can be
% found in Topic #3, Wavelet Digest Vol. 1 , Nr 2.
I recently attended a workshop called "Wavelets Down Under" (in
Australia!) which was very useful. The software is around, but
exactly where for 'your' purposes I am unsure of.
I hope this has been of help to people. Thank you Victor for your
help, and thank you Eero.
(Miss) Licinda Woudberg
Dept. of Computer Science
University of Otago
email: email@example.com or firstname.lastname@example.org
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