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   -> Volume 5, Issue 4


Web: Internet Imaging Project
 
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Lee Daniel Crocker (lee@piclab.com)
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PostPosted: Wed Dec 04, 2002 9:52 am    
Subject: Web: Internet Imaging Project
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Web: Internet Imaging Project

This is a call for participation in a project to bring new
advanced lossy image compression technology to the Internet
in an open, patent-free, cooperative way.

While GIF and JPEG are at the moment the most commonly used
formats for encoding graphical images and photographic images
respectively in Web pages, the developers of PNG have succeeded
in creating a format to replace GIF that is better-compressed,
patent-free, more capable, and better suited to Internet use.
The PNG specification, published by the World Wide Web Consortium,
has been adopted by CompuServe as their official replacement for
GIF, and is supported by dozens of software vendors in such
products as Adobe Photoshop and Microsoft Internet Explorer 3.0.

(See http://quest.jpl.nasa.gov/PNG/ for more details)

The developers of PNG are now beginning a project to do for
photographic images what they have done for graphical images
by creating a format to replace the aging and less capable JPEG
format with one designed along the lines of PNG. The format
will share much of its design and technology with PNG, enabling
developers to share code with its sister format to reduce
development time and machine resources. The primary adaptation
to photographic images will be the addition of lossy compression,
perhaps wavelet-based or traditional DCT-based, that we hope will
outperform JPEG in compression size and image quality, while
bringing this cutting-edge technology from its current state of
competing proprietary formats to one of standardization and
cooperation. Web-targeted features of PNG that will be shared
with the new format include transparency, robust transmission,
progressive display, and descriptive text.

As with PNG, the new format will be a patent-free, open standard
developed and published publicly, accompanied by freely usable
sample implementations. All interested parties are welcome to
join the effort by adding themselves to the mailing list, or by
using the Web-based mailing list archive.

To add youself to the mailing list, send a message with the
words "subscribe pnp-list" as its only contents to the address
"majordomo@dworkin.wustl.edu", or fill out the Web subscription
form at "http://www.piclab.com/PNP/".

Lee Daniel Crocker
lee@piclab.com
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