Author Page
Tom Lane
email address for Tom Lane, organizer of the Independent JPEG group, omniscient poster to comp.compression on JPEG issues.
I need specs for graphics formats
Links found in the comp.compression FAQ that help with this question
http://www.faqs.org/faqs/compression-faq/part1/section-29.html
JPEGDUMP from Colosseum Builders, Inc.
This application dumps the contents of JPEG blocks in a JFIF file.
Compression Basics by Pasi ‘Albert’ Ojala
An introductory paper. Includes information on Huffman coding, Info Theory, Coding, LZ77, LZ78, and more. This page also has a good set of links.
Ian H. Witten
Ian H. Witten’s Home Page. I’m Professor of Computer Science here in sunny New Zealand — Department of Computer ScienceUniversity of Waikato, New Zealand
History of the Portable Network Graphics (PNG) Format
This article originally appeared in the electronic Linux Gazette in January 1997 and was subsequently (re)printed in the April 1997 issue of Linux Journal. The main text is current as of early January 1997, with updates appearing at the very end as Author’s Notes.
Markov Coders
A set of Markov compressors by Charles Bloom, including source code. This includes links to a wide variety of his programs, including Context Coders, List LRU, and DefSum, along with a link to an early paper of his.
Fractal Image Compression : Theory and Application
by Yuval Fisher (Editor). Featuring a collection of articles by twelve experts in the field of fractal image compression, this book contains the complete details of how to encode and decode images, offering working codes that are usable in applications. Includes some of the latest results in this field..
If you are interested in buying […]
http://www.amazon.com/exec/obidos/ASIN/0387942114/theinternetdatac
Lossless Audio Compression with LTAC
LTAC allows for lossless audio compression of PCM coded audio signals (16 bit), i.e. decoding results bit for bit in the original bit stream of the PCM coded signal. In contrast to LTAC there exist a lot of lossy coding algorithms like MPEG, ATRAC and AC-3, which yield higher compression ratios but in any case […]
ExtractorPC 1.00
ExtractorPC is a free utility for expanding the files in archives created by Compact Pro(tm).
PAK The File Compression Utility Version 2.51
PAK is a utility to create and maintain file archives in compressed form. There are several advantages to compressing files. On a hard disk, most files are accessed infrequently. Reducing the size of these files allows more of them to remain on the hard disk, where they are more accessible than on a […]
Zip 16 and 32 bit Executables, including encryption, alternate site
An alternate site for Zip 2.0
comp.dcom.fax FAX FAQ
This article contains the answers to some Frequently Asked Questions (FAQ) often seen in the USENET newsgroup comp.dcom.fax relating to facsimile standards, software, and hardware. Most importantly, contains an explanation of FAX encoding.
Audio File Programs and Routines
The AFsp package contains audio file utility programs and a library of routines for reading and writing audio files. This ftp site contains three different releases of the software. Includes programs to compare, copy, filter, an analyze audio files. Also has resampling, LPC, and noise generation programs. Executables for Windows and Sun, with a wide […]
Garbo repository for PC archiving programs
This FTP site has copies of a wide variety of archiving programs. Includes current programs such as PKZip, ARJ, and RAR, as well as historically relevant programs such as PAK and ARC. Look at 00index.txt for a directory of what’s on hand.
Lynn Lantz
“I do believe that my product is superior to all other compression algorithms to date. It is lossless, works on any file type on any platform, is recursive (ie, the compressed file can be compressed again, and then again, and so on) so that ANY size file can be compressed to 16 bytes or […]
May97 Benchmark
A comparison of JAR, RAR, and PKZIP. Lacks rigor.
PPM R — implementation by Rogerio Brito
This PPM implementation has a complete batch of source code but no external documentation. I believe that all of the code is documented internally in Portugese. Corrections to this theory are welcome.
Code Design via Selection of a Statistical Model
by John C. Kieffer (Information Theory Research Group, Electrical Engineering, University of Minnesota). A survey of techniques for designing codes with minimal redundancy. A Postscript copy of an academic paper.
Huffman Coding of ACIS Pixel Data
ACIS, the AXAF CCD Imaging Spectrometer, is an instrument being built by a team from the Massachusetts Institute of Technology’s Center for Space Research and the Pennsylvania State University for the Chandra X-ray Observatory (formerly, AXAF), scheduled for launch in 1999.
This is a good paper discussing practical implementation of data compression in a real world […]
Digital Compression for Multimedia: Principles & Standards
Jerry Gibson, Toby Berger, Tom Lookabaugh, Rich Baker and David Lindberg. Drawing on their experience in industry, research, and academia, this powerful author team combines their expertise to provide an accessible guide to data compression standards and techniques and their applications
Please use
this link to purchase the book through Amazon.com. Your purchase will help support […]
JPEG Wizard by Pegasus Imaging
For those individuals looking for an application that deals with all aspects of JPEG imaging–The JPEG Wizard is it! The JPEG Wizard is based around the premise that altering and processing an image at the algorithmic level instead of the visual level greatly preserves the quality of an image.
ZLIB for Visual Basic
Download ZLIB for Visual Basic (26kB 24-8-97) ZLIB has been ported to an .OCX by Mark Nelson. If you don’t want the overhead of an .ocx, you can use this zlibvb.bas file (module) to give you access to the basic routines. In order to use it, you’re going to need one of the ZLIB.DLL files […]
Not Really Vanished
The home page for NRV, the next generation successor to LZO. NRV is a portable lossless data compression library written in C++. It offers pretty fast compression and *very* fast decompression. Decompression requires no memory. NRV is free under the GPL.
DCL reader Luigi T. saidIt would be very useful for my needs, but at […]
Charles Bloom’s Page
Charles has a really great collection of software he has written on this page, much of it is indexed here in the appropriate pages. His home page also contains links to some interesting papers and descriptions on various algorithms, as well as some archived posts that explain some compression topics. It’s well worth nosing around […]
Image Compression via Joint Statistical Characterization in the Wavelet Domain
By Robert W Buccigrossi and Eero P Simoncelli, GRASP Laboratory Technical Report #414, University of Pennsylvania, May 30, 1997. This page contains the abstract, with links to the full paper, as well as software associated with it.
http://www.cis.upenn.edu/~eero/ABSTRACTS/buccigrossi97-abstract.html
Information Theory
Lecture notes for a course on Information Theory, by John Lafferty, School of Computer Science, Carnegie Mellon University. Includes handouts, problem sets, code, additional lectures, and a page of links.
LZRW4: Ziv and Lempel meet Markov
By Ross Williams, 1991. A description of a lossless algorithm invented by Ross Williams. The algorithm is based on LZW compression with the addition of a Markov-like prediction engine. Maybe.
http://www.cs.pdx.edu/~idr/unbzip2.cgi?compression/lzrw4.html.bz2
Compression Ratios
A set of benchmarks for lossless compression of various test sets, including the CCITT B&W images, the Calgary Corpus, and a Gray Scale set. Includes some dates for checking historical progression.
The Compression Site
by Dave Kristula. Has download pages for archivers, plus benchmark results.
