Author Page
The Lossless Compression (Squeeze) Page
This page is designed made to teach people about Lossless compression algorithms through the use of text graphics and Java Applets! Dominik Szopa has created pages that demonstrate Huffman, Adaptive Huffman, and LZW compression.
DCL reader SF has this to say: While the site itself is rather quick, it’s disorganized…the Java applets really don’t show what’s […]
Greenleaf Software
Greenleaf sells ArchiveLib, an archiving library that supports both Zip and a proprietary format
Entropy on the World Wide Web
Chris Hillman’s page of links to Information Theory pages, papers, etc.
http://www.informatik.uni-trier.de/~damm/Lehre/InfoCode/entropy.html
The Calgary Corpus Compression Challenge
Leonid A. Broukhis puts his money where his mouth is by offering a cash prize for good, reproducible compression. He has paid out at least one modest prize.
Complexity On-Line: Frequently Asked Questions
Fractals and Scale
By David G. Green, Environmental and Information Sciences, Charles Sturt University. A short tutorial that provides an introduction to just what fractals are all about.
ACE Archiver
The home page for the shareware ACE archiver, including download links. Both self extracting and Zipped versions of the file are available from this page. This page also includes free source code for UNACE, and variants on ACE and UNACE. Reader comment Excellent user interface, better compression than Zip.
The gzip home page
The home page for gzip, the free compression program.
LZO download site
The primary site for downloading LZO files. This includes mini-LZO, a shrunk down version of the LZO library, Perl-LZO, and Python-LZO.
Pegasus Imaging Corporation
Pegasus Imaging Corporation has their fingers in many different pies, mostly related to imaging and image compression. This home page has links to many of their diffferent products, a variety of programs and libraries.
BWT Animation
The site bills itself as an animation, but in fact it is just a couple of screen captures that demonstrate an animation.
Zip and Unzip for Win95
Windows 95 programs Zip and Unzip that use zlib for the compression engine. These two programs don’t support encryption, multivolume archives, or old PKZip 1.x formats. Don’t confuse thes with the Info-ZIP products, this is something else entirely.
Jeff Vitter
Email address for Jeff Vitter, prolific author of papers which frequently include data compression topics
codecs.tgz
codecs.tgz contains C source code for three different types of codecs: LZW, RLE, and Huffman. The archive contains source code documented in both French and English.
JPEG Group free software
This distribution contains MS-DOS executable copies of version 6b of the Independent JPEG Group’s free JPEG software. Several different programs for conversion and manipulation of JPEG files.
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpeg6b.zip
JPEG Group free software - 32 Bit Versions
This distribution contains MS-DOS 32 bit extended executable copies of version 6b of the Independent JPEG Group’s free JPEG software. Several different programs for conversion and manipulation of JPEG files.
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpeg6b32.zip
JPEG Group free software source
Free, portable C code for JPEG compression is available from the Independent JPEG Group. Source code, documentation, and test files are included.
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpegsr6.zip
Sam’s Compression Links
A short list of assorted compression links, no particular theme.
pbmplus - image file format conversion package
Pbmplus is a toolkit for converting various image formats to and from portable formats, and therefore to and from each other. The idea is, if you want to convert among N image formats, you only need 2*N conversion filters, instead of the N^2 you would need if you wrote each one separately.
This software isn’t necessarily […]
LZO FAQ
The first question in the FAQ: I hate reading docs - just tell me how to add compression to my program
The FBI Fingerprint Image Compression Standard
This page contains a summary of the Federal Bureau of Investigation’s image coding standard for digitized fingerprints, developed and maintained by the FBI, Los Alamos National Lab, and the National Institute for Standards and Technology. The standard is a discrete wavelet transform-based algorithm referred to as Wavelet/Scalar Quantization (WSQ).
Non-US Data Compression and Coding Research
R.M. Gray (Ed.), M. Cohn, L.W. Craver, A. Gersho, T. Lookabaugh, F. Pollara, and M. Vetterli, November 1993. A Foreign Applied Sciences Assessment Center (FASAC) report prepared for Science Applications International Corporation (SAIC) under U.S. Government sponsorship. This is the draft version in Poscript format submitted to SAIC.
SoftSound
SoftSound deals with all aspects of processing the digital audio signal. We build audio coders to drastically reduce the data rate of high quality audio and speech coders for extremely low bandwidth situations. SoftSound produces the Shorten and ATELP audio coders.
Markus Franz Xaver Johannes Oberhume
Personal home page for Markus Franz Xaver Johannes Oberhumer, the author of LZO
Image editors with PNG support
This page has a really big batch of links to editors that have PNG support. The links to the individual editors haven’t been added to the database, so this page should be considered to be the master source.
Calgarry Corpus test results
A set of test results for files run against the Calgary Corpus. This set of test results are kept on the Canterbury web site so that they can be easily referenced for comparison purposes.
Data Compression with the Burrows-Wheeler Transform
An article by Mark Nelson that appeared in the September 1996 issue of Dr. Dobb’s Journal. At the time it appeared, the BWT was relatively unknown among compression enthusiasts. This article includes source code that implements a simple test program that demonstrates BWT compression.
Compress::Zlib and LZO bindings for Perl
This ftp directory contains the source code to provide Perl bindings for two different compression library products: zlib and LZO.
ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/
