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  • Bijective BWT (2 Comments)

    David Scott has written a bijective BWT transform, which brings all the advantages of bijectiveness to BWT based compressors. Among other things, making BWT more suitable for compression-before-encryption and also give (slightly) better compression.

  • Asymmetric Binary System (107 Comments)

    Jarek Duda’s “Asymmetric Binary System” promises to be an alternate to arithmetic coding, having all the advantages, but being much simpler. Matt has coded a PAQ based compressor using ABS for back-end encoding. Update: Andrew Polar has written an alternate implementation of ABS.

  • Precomp: More Compression for your Compressed Files

    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them. Christian Schneider’s Precomp comes to rescue by undoing the harm.

  • On2 Technologies is Hiring

    There aren’t too many companies working on cutting edge codecs, and of those few this one is hiring. Best of luck.

  • China’s AVS Specifications Available (2 Comments)

    Its old news that China has developed their own Advanced Video Standard to avoid high licensing fees. English translation of the standard is now available, along with the IPR policy. Finally something technical that you can get your hands on to feed your appetite.

Version 0.9.6 of the IIPImage Server Released

Posted by Sachin Garg on 9th August 2006 | Permanent Link

IIPImage project is a web client/server system for viewing very high resolution (even gigapixels) images and is designed to be able to work efficiently even over slow dialup connections. The server is an webserver fastcgi plugin and images are viewed via a Java or Javascript client.

Windows installer for server was released in November 2005. The project’s demo got dugg for hosting the The Internet’s Largest Image Online (86400 x 43200 pixels).

New features in this latest version include:

  • 16 bit image compatibility
  • contrast control
  • configurable server tile cache
  • better error handling and various bug fixes

IIPImage authors also presented a paper A New Concept in High Resolution Internet Image Browsing at 10th International Conference on Electronic Publishing held in Bansko, Bulgaria in June, 2006.

3 Responses to “Version 0.9.6 of the IIPImage Server Released”

  1. Sim Says:
    August 10th, 2006 at 11:39 pm

    I read the website and paper, why does it use tiles and pyramidal tiffs? Will it not be easier and better if something like this is built using a progressive format?

    Then it won’t need pyramidal images.

  2. Sim Says:
    August 10th, 2006 at 11:41 pm

    and won’t need dynamic recompression.

  3. Ruven Says:
    August 11th, 2006 at 10:12 am

    A tiled format allows us to extract a subsection of an image without having to decode and send the entire image.

    The pyramidal structure also avoids having to read full-size images if the client only requests a smaller view. Sure, a format with progressive resolution (as opposed to progressive quality like JPEG) could replace the pyramidal structure. JPEG2000 supports this kind of progressive resolution and we’re looking to integrate support for this into IIPImage in the future.

    Dynamic recompression is not strictly required, but it’s included so that the client can set it’s own compression level to optimize bandwidth use.

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This entry was posted on Wednesday, August 9th, 2006 at 3:12 am by Sachin Garg. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.