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Re: do vector graphics enhance our concept of self?

From: Charles McCathieNevile <charles@w3.org>
Date: Tue, 30 Jul 2002 07:48:23 -0400 (EDT)
To: jonathan chetwynd <j.chetwynd@btinternet.com>
cc: David Woolley <david@djwhome.demon.co.uk>, <w3c-wai-ig@w3.org>
Message-ID: <Pine.LNX.4.30.0207300742290.15179-101000@tux.w3.org>
I have attached an SVG image. The file size is a bit bigger than the listed
3.2k, because it downloads two jpeg images.

But it shows photo-realistic transparent jpegs which can be animated to move
around like sprites.

This was generated by Jim Ley's annotation tool - you load up a jpeg and
trace around the bit you want, then say who it is.

I found it by looking through his search tool -

The one modification I made to the code was to change the opacity value - it
had opacity="1" for both photos, and for one I made it opacity="0.5" (1 means
not at all transparent, 0 means completely transparent). It is not difficult
to adapts Nick's tool to do this by default, or as an option.

What this shows is that with SVG you can easily select a piece of a jpeg you
want, and use it as a photo-realistic transparent animated sprite. It adds
around 1-2k per image. It works in the Adobe SVG plugin (available for many
browsers - I used it in iCab on MacOSX but it works in Explorer, Netscape,
and compatible browsers. I haven't tested this yet in other substantial SVG
browsers such as Batik but expect it to work fine).



On Tue, 30 Jul 2002, jonathan chetwynd wrote:

>Unfortunately, given our obsession with identity, if SVG is not capable of
>photorealistic representation, in a small file size, then we might then seem
>to need a (jpeg like?) high compression format, with transparency, and
>capable of scaling. Alternatively if it were capable, perhaps a camera, or
>at least a conversion tool would be extremely popular.
>In terms of images, bandwidth and accessibility, this may well be one of the
>critical areas for development in the near future.
>many images are just not accessible.
>----- Original Message -----
>From: "David Woolley" <david@djwhome.demon.co.uk>
>To: <w3c-wai-ig@w3.org>
>Sent: Monday, July 29, 2002 10:33 PM
>Subject: Re: do vector graphics enhance our concept of self?
>> > Can anyone point to realistic vector portraits, with a small file size?
>> That's really a research topic for low bandwidth telephones, although
>> the games people may also have something, but I suspect it is
>> proprietory and may still require a texture map, as JPEG etc.
>> It seems to me, though that this mailing list is not a good place for
>> asking the question.  If you are lucky, someone will know, but you
>> are not targetting the question well.
>> I'd try the BT Research web site, as they were interested in this sort
>> of thing at one time.  TV broadcasters may be as well.

Charles McCathieNevile    http://www.w3.org/People/Charles  phone: +61 409 134 136
W3C Web Accessibility Initiative     http://www.w3.org/WAI  fax: +33 4 92 38 78 22
Location: 21 Mitchell street FOOTSCRAY Vic 3011, Australia
(or W3C INRIA, Route des Lucioles, BP 93, 06902 Sophia Antipolis Cedex, France)

Received on Tuesday, 30 July 2002 07:48:26 UTC

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