Some WWW Image Compression
Warning!! Most of the external links in this page are out of date and therefore broken. They are retained with the hope that they can be eventually updated.
If you have a contribution that can be added to this page please
send an e-mail to one address listed in the
For introductory information about compression in general, a good
place to start is
Frequently Asked Questions. (Note: some of its contents about the
best compression methods are obsolete.) Links directly related to image
For information about medical imaging resources, try this
Papers Related to SPIHT
- The Waterloo BragZone,
maintained by John Kominek,
presents comparisons of several image compression schemes in various tests. Both
numerical results and images are available.
- See the
of PSNR results for the best Wavelet image compression
methods, maintained by the
Image Communications Lab
at UCLA. (Among those listed, guess how many also have
the same set of advantages.)
- ARCHIVE1.COM is a site where you can compress with SPIHT interactively. The site has a large database of color images or you can upload your own images. You need a broadband connection to
use this site effectively.
- VcDemo is an Image and Video
Compression Learning Tool
developed by the Information and Communication Theory Group at Delft University of Technology that runs
several image and video coders and displays the results before your eyes. With its
intuitive graphical interface (Windows 95/98/NT), you can easily compare
SPIHT against a host of other coders (EZW, VQ, fractal, JPEG,...) using your
Some Other Interesting Papers
Need a simple program for lossless and also high-quality lossy
compression? Try the Huffman-based program we use
everyday, called lsp.
Is it good enough? Well, we used it for lossless compression in
Stuart Inglis' se
9 test images (
Goldhill, Babboon, Camera, etc.) and obtained an average 1.72 compression ratio,
while the state-of-the-art
yielded 1.78 (only 3% larger!). And lsp it can be used for lossy
- The JPEG images shown in our comparisons
were obtained with the program
John Bradley. (Alternative link.
Links to other pages.
SPIHT Home Page;
Properties of the Method