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Re: do vector graphics enhance our concept of self?

From: Charles McCathieNevile <charles@w3.org>
Date: Fri, 26 Jul 2002 12:50:41 -0400 (EDT)
To: jonathan chetwynd <j.chetwynd@btinternet.com>
cc: "WAI List (E-mail)" <w3c-wai-ig@w3.org>
Message-ID: <Pine.LNX.4.30.0207261246440.25823-100000@tux.w3.org>

I think SVG is going to be your best bet here. It does have implementation,
it is realtively easy to clip a bit of an image and resize it, I am pretty
sure you can add transparency directly. (I am waiting for Jim Ley to say he
has a tool that does this already, but if he doesn't, I am sure someone else
does).

Cheers

Chaals

On Fri, 26 Jul 2002, jonathan chetwynd wrote:

>Dont get me wrong,  i love svg, not sure its quite the right direction but
>its moving fast.
>
>my point was really that jpegs are quite a few years old, and bar the silly
>copyright issue, surely someone (in scandinavia?) could bring out a mark 1
>version with transparency?
>this might degrade quite nicely from SVG.
>
>seems weird to me, that these 2 standards (gif and jpeg) got stuck in the
>mire of history...
>
>sorry if this is a ramble*, but I spend hours trimming and resizing jpegs
>and then have to convert them to gifs, merely for transparency, and in many
>cases the file size can be up to 3 times, which for (no increase in quality,
>and) transparency is very expensive.
>
>jonathan
>
>*given the very high use of faces, it doesn't seem unreasonable that there
>might be mileage in a specific algorithm, there certainly are very high end
>animated ones.
>vector gradients of tone, which svg most probably is capable of.
>
>----- Original Message -----
>From: "Charles McCathieNevile" <charles@w3.org>
>To: "jonathan chetwynd" <j.chetwynd@btinternet.com>
>Cc: "WAI List (E-mail)" <w3c-wai-ig@w3.org>
>Sent: Friday, July 26, 2002 1:01 PM
>Subject: Re: do vector graphics enhance our concept of self?
>
>
>>
>> Please explain further - I am not sure if I understand...
>>
>> (in case I do:
>>
>> Do you mean photo-realistic pictures of faces, or cartoon-type
>caricatures,
>> or somewhere in between?
>>
>> It seems to me that SVG is in fact a fairly small hammer for most graphics
>> nuts, and it certainly supports transparency and sprites (objects whose
>> position and other properties can be animated) in a fairly lightweight
>> manner.
>>
>> GIF and PNG support transparency for photo-realism - as far as I am
>> aware jpeg does not (but I am not a graphics expert). But if you embed a
>jpeg
>> within SVG you can clip it, set its transparency, use a filter or mask
>> effect, etc.
>>
>> If you can describe an example I will try to produce it in SVG (by using
>bare
>> code editing instead of one of the nice tools that I never quite get
>around
>> to installing - try doing THAT with the source of a GIF <grin/>. However I
>> think editing code is a silly way to author in general, and appreciate
>that
>> this is valuable because you can also do it with graphics tools that have
>a
>> more appropriate user interface).
>>
>> Cheers
>>
>> Charles
>>
>> On Fri, 26 Jul 2002, jonathan chetwynd wrote:
>>
>> >Is there a (popular) graphical compression algorithm for faces? with
>transparency for sprites?
>> >Are vector graphics capable of meeting this need? (svg+jpg seems like a
>large hammer for such a small nut)
>> >Do we need such a minimal standard? (peepo uses gifs, and has done for
>some years, because of the need for transparency.)
>> >
>> >Looking through the music sites, the use of jpeg is noticeable (that is
>the absence of flash, or vector graphics) where representation of the
>artiste is concerned.
>> >(Though flash is frequently used for navigation.)
>> >
>> >for films categorised by disability visit:
>http://www.disabilityfilms.co.uk/
>> >
>> >jonathan chetwynd
>> >http://www.peepo.com
>> >
>> >
>> >
>>
>> --
>> 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)
>>
>>
>
>

-- 
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 Friday, 26 July 2002 12:50:43 GMT

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