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All about the most recent compression techniques, algorithms, patents, products, tools and events.


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Recent Posts

  • Google Snaps Up On2 (12 Comments)

  • Bijective BWT (37 Comments)

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  • Asymmetric Binary System (172 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 (9 Comments)

    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them.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 (11 Comments)

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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:

    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:

    and won’t need dynamic recompression.

  3. Ruven Says:

    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.