The USC-SIPI Image Database
The USC-SIPI image database is a collection of digitized images. It is maintained primarily to support research in image processing, image analysis, and machine vision. Contains copies of the mystical goddess Lenna.
http://sipi.usc.edu/services/database/Database.html
Fractal Frequently Asked Questions and Answers
Tim Bell’s home page
Tim Bell is one of the many compression mavens in Australia and New Zealand. This page contains links to many of his ongoing projects.
http://www.cosc.canterbury.ac.nz/~tim
BMF
BMF program is lossless/near-lossless image compression utility. It
supports true colour, high colour, greyscale and paletted images compression.
ftp://ftp.elf.stuba.sk/pub/pc/pack/bmf_1_10.zip
James Storer’s home page
James Storer chairs the annual DCC event, and keeps busy in many other areas. Back in the bygone era his book on Data Compression had a lock on the market. See what he’s been up to lately here.
http://www.cs.brandeis.edu/~storer/
The Design and Analysis of Efficient Lossless Data Compression Systems
Our thesis is that high compression efficiency for text and images can be obtained by using sophisticated statistical compression techniques, and that greatly increased speed can be achieved at only a small cost in compression efficiency.
Complete paper is included in PS format.
http://www.cs.brown.edu/publications/techreports/reports/CS-93-28.html
Jeff Vitter’s Recent Papers
Jeff Vitter is a publishing machine. A substantial subset of is work deals with data compression and/or information theory. On top of all that, he’s good enough to keep most of his work online in ps and pdf format.
http://www.cs.duke.edu/~jsv/Papers/catalog/
Ashok C. Popat’s dissertation
The dissertation itself, in PS format, along with code used in the dissertation. The code implements k-ary arithmetic compression.
ftp://ftp.media.mit.edu/pub/k-arith-code/
Bernie’s TMW0.51 Page
TMW is a program for losslessly compressing greyscale images that gives world class compression ratios, at the cost of being tremendously CPU intensive. The current version is TMW_0.51, and is still completely experimental.
http://www.cs.monash.edu.au/~bmeyer/tmw/
Bernie’s TMW0.51 Page
The home page for TMW. TMW is a program for losslessly compressing greyscale images that gives world class compression ratios, at the cost of being tremendously CPU intensive. The current version is TMW_0.51, and is still completely experimental
http://www.cs.monash.edu.au/~bmeyer/tmw/index.html
UUNet FTP Site
This ftp site has copies of Zoo, ARC, gzip, and zip, in some cases for multiple platforms.
ftp://ftp.uu.net/pub/archiving/
PKZIP Appnote
This ftp site contains the PKZIP and InfoZip appnotes in various incarnations, plus RFCs 1950, 1951, and 1952. It is referenced in the zlib docs as if it were the official location for the gzip specification. If you are attempting to understand the format of PKZIP archives you need this document Copies of RFCs 1950, 1951, and 1952 are here as will.
ftp://ftp.uu.net/pub/archiving/zip/doc/
Notes on suffix tree construction
Notes on suffix tree construction, some course notes for COMP 612: Graduate Seminar in Compiler Construction, includes some pointers to important papers.
DataCompression.info user David D. had this complaint: None of the links work on this page, all there is is a short paragraph on suffix trees. I have to agree, it’s a rather strange page.
Booz 2.0 — Barebones Zoo Extractor/Lister
Booz 2.0 is a small, memory-efficient, public domain Zoo archive extractor/lister. It is not fancy. It does not recognize the advanced features available in current versions of Zoo, such as long filenames, directory names, comments, and multiple file generations. Extraction always uses a short MS-DOS format filename and all extracted files go
into the current directory
ftp://garbo.uwasa.fi/pc/arcers/booz20.zip
CODEC v3.10
CODEC is a software package that focuses on the non-destructive compression/decompression and the encryption/deciphering of one or more files in the same work session.
ftp://garbo.uwasa.fi/pc/arcers/codec31.zip
CCITT standard fax images
JAM ™ Version 1.25
JAM is a transparent hard disk compressor, which enlarges your disk space. With the JAM you will forget about annoying messages like ‘Insufficient disk space…’ with no need to purchase a new hard disk.
ftp://garbo.uwasa.fi/pc/arcers/jam125sw.zip
JRCHIVE 1.10
JRchive is a program for compressing and storing files in an archive. It has a “concatenated archive” option that puts the files in the archive first, then compresses it for better compression ratios.
ftp://garbo.uwasa.fi/pc/arcers/jrc110.zip
Common Archives Library Project
Home page for the Common Archivers Library project. This page is completely in Japanese, but an English version of the index is available at a single click. The goal of this project appears to be to provide standard library software that works with any and all archives. Good idea.
http://www.csdinc.co.jp/archiver/
LHA Ver 2.55E English version
LHarc, a precursor to the LHA file utility, became one of the standard file compression/extraction utility in Japan despite its slowness. I am also pleased that some overseas users have taken to using this tool.
ftp://garbo.uwasa.fi/pc/arcers/lha255e.exe
RAR 2.06
The RAR Archivever - text UI.
An enthusiastic DCL user had this to say about RAR: The king of archivers, period. Nothing comes close - no laughable zippers, the slow Jar, or the useless program that tries to be a competition for RAR (winace). This is the best! I’ve used RAR since its DOS beginnings, for years, and it only gets better and better!.
ftp://garbo.uwasa.fi/pc/arcers/rar206.exe
Streamline Archival Utility Ver 1.00
SAR is a simple archival utility that uses the Huffman algorithms. It has been designed to utilize a single executable for all functionality and has proven to be more effective than most archival utilities on the market today. Although SAR does not have a lot of the commands other utilities have, it more than makes up for it in compression and ease of use. Future releases of SAR will continually include more functionality.
ftp://garbo.uwasa.fi/pc/arcers/sar1.zip
July 96 Benchmark
SARJ v1.21 - FreeWare by TSF SoftWare
Create and expand solid archives with the well-known ARJ, able to handle fool archives as it was an ARJ archive (GUS), support of Win95’s long file names, ANSI archive comment allowed, with a fast display, ANSI.SYS *not* necessary, protection against ANSI-BOMB, optimized for a minimal use of the RAM (memory), compatibility with ARJ;
- security improved for encrypted arjives, often beter than C**** (a similar product);
ftp://garbo.uwasa.fi/pc/arcers/sarj121.exe
UNSIT — StuffIt Archive File Disassembler
UNSIT is a simple utility for PC users to extract files from a StuffIt file. StuffIt files usually appear with the “.SIT” extension. StuffIt is a program for Macs similar to ARC for PCs. It collects several files in a single file and also compresses the data using run length, Huffman, or LZW compression. Unfortunately, this means Mac files are frequently inaccessible to PC users as they are now “stuffed” to save transmission costs and disk space.
ftp://garbo.uwasa.fi/pc/arcers/unsit30.zip
Secção de Análise de Sinais
A set of links that includes a few data compression sites. This page is from Instituto Superior de Engenharia de Lisboa (a Lisbon Polytechnic school), Portugal, and is in Portuguese. This page contains a link to the Data Compression Group object oriented framework for teaching C++. (Indexed here as The DCG Framework.
http://www.deetc.isel.ipl.pt/analisedesinai/
zoo - manipulate archives of files in compressed form
Zoo is used to create and maintain collections of files in compressed form. It uses a Lempel-Ziv compression algorithm that gives space savings in the range of 20% to 80% depending on the type of file data. Zoo can store and selectively extract multiple generations of the same file. Data can be recovered from damaged archives by skipping the damaged portion and locating undamaged data with the help of fiz(1).
ftp://garbo.uwasa.fi/pc/arcers/zoo210.exe
