data compression link collection


Quantization techniques generally compress by compressing a range of values to a single quantum value. By reducing the number of discrete symbols in a given stream, the stream becomes more compressible.

QColorQuantizer Gets the Most out of Your Picture

This is a nice article posted on by Sjaak Priester. In this article Sjaak uses octree color quantization to reduce a JPEG image with millions of colors down to a GIF with 256, as
well as giving you a look or two at Microsoft’s nice GDI+ API.


Posted in February 8th, 2004

University of Washington Data Compression Laboratory

Current research projects in our lab include research into vector quantization (VQ), wavelets, image compression, edge detection using VQ, VQ for image browsing, VQ design for noisy channels, halftoning, and color palette management.

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Posted in May 4th, 2003

Data Compression Bibliography

The University of Washington has a nice bibliography here, with pointers to books on Data Compression, VQ, Wavelets, and Information Theory.


Posted in May 4th, 2003

VQ Code

This page has source code for a couple of different VQ compression programs from the University of Washington’s EE Data Compression Labs.


Posted in May 4th, 2003

Poynton’s Color FAQ

This document clarifies aspects of colour specification and image coding that are important to computer graphics, image processing, video, and the transfer of digital images to print.


Posted in March 20th, 2003

Image Compression with Vector Quantization

This is billed as an introductory article with illustrations. I haven’t seen it - it requires free registration with this game development site. If you’re interested, please check it out and send me your thoughts.

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Posted in May 1st, 2002

Nearly Optimal Vector Quantization via Linear Programming

This paper by Jyh-Han Lin and Jeff Vitter outlines new VQ algorithms based on linear programming. According to the abstract, the algorithm is the first known polynomial-time codebook design algorithm.


Posted in April 7th, 2002

Vector Quantization and Signal Compression by Allen Gersho

Published in Books, Quantization

Kluwer Academic Publishers, Boston Hardbound, ISBN 0-7923-9181-0 November 1991, 760 pp.

Please use
this link to purchase the book through Your purchase will help support this web site.

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Posted in January 19th, 2002

Vector Quantization

Mohamed Qasem’s page dealing with VQ. A nice overview of what it’s all about, plus links to other sites and people in the VQ world.

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Posted in December 15th, 2001

Vector Quantization and Signal Compression

Published in Books, Quantization

by Allen Gersho and Robert M. Gray. This book shows up in at least one bibiblography, I would appreciate reviews from a reader.

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Posted in August 5th, 2001


An audio compression format invented at NTT’s Cyber Space Laboratories. Get your player and compressor right here. (English avaible by following the sharp-eyed link.)

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Posted in July 30th, 2000

Vector Quantization

A short description of VQ by Nam Phamdo. Contains an animation which provides a nice picture of what actually happens in VQ.


Posted in July 29th, 2000

An LBG VQ program in C

This program by Nam Phambdo doesn’t have any declaration regarding use, so please contact the author before attempting to use it.

Reader Prabhu S. pronounced this program “Nice.”

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Posted in July 29th, 2000


The Signal Processing and Coding Laboratory (SPACL) at The University of Arizona has some papers on line, plus some information on their current projects. They seem to be interested in wavelets, quantization, and signal coding.

A DCL reader complained: Very little useful information on the website. On topic, but not helpful at all.

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Posted in July 15th, 2000

Publications of Pamela C. Cosman

A bibliography of Pamela C. Cosman’s papers, with links to many that are available on line. Many papers on wavelet-based and VQ image compression, along with a few miscellaneous others.


Posted in July 2nd, 2000

Lossy Compression of Individual Signals based on One Pass Codebook Adaptation

Paper by Christopher Chan, discussing quick and easy codebook development with VQ schemes.


Posted in July 2nd, 2000

Adaptive Vector Quantization for the Coding of Nonstationary Sources

Adaptive VQ describes a way to get asymptotically optimal results from VQ while adapting to changes in input statistics.


Posted in July 2nd, 2000

Vladimir Valenta’s Home Page

Vladimir has pointers to a batch of his papers here, which seem to concentrate on image compression, including VQ and Wavelet based compression. Plus many links to image compression, fractal, and wavelet pages.

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Posted in June 3rd, 2000

Mary Holly Johnson’s source code

Mary Holly Johnson wrote a couple of papers on something called ECVQ, which I’m guessing is a type of vector quantization. This ftp directory has a bunch of C code that probably implements the code from one or more of her papers.

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Posted in February 21st, 2000

Papers of Antonio Ortega

Antonio Ortega at USC has quite a few compression related papers on line. They include papers on wavelets and quantization.

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Posted in January 23rd, 2000

Vector quantization of image subbands: a survey

by P.C. Cosman, R.M. Gray, and M. Vetterli, IEEE Transactions on Image Processing, February 1996. They discuss using VQ in combination with subband and wavelet decompositions.

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Posted in November 14th, 1999

What is Vector Quantization?

The comp.compression FAQ provides you with an answer to this question.

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Posted in November 14th, 1999

Bayes risk weighted vector quantization with posterior estimation for image compression and classification

by Keren O. Perlmutter, Sharon M. Perlmutter, Robert M. Gray, Richard A. Olshen, and Karen L. Oehler IEEE Transactions on Image Processing, February 1996). We investigate several VQ-based algorithms that seek to minimize both the distortion of compressed images and errors in classifying their pixel blocks.

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Posted in November 13th, 1999

NeuQuant: Fast High-Quality Image QuantizationNeuQuant: Fast High-Quality Image Quantization

The NeuQuant Neural-Net image quantization algorithm (© Anthony Dekker 1994) is a replacement for the common Median Cut algorithm. It is described in the article Kohonen neural networks for optimal colour quantization in Volume 5, pp 351-367 of the journal Network: Computation in Neural Systems (Institute of Physics Publishing, 1994).

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Posted in November 11th, 1999