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Accessibility Features in SVG - Image Scaling

From: Dave J Woolley <DJW@bts.co.uk>
Date: Mon, 17 Jul 2000 13:40:12 +0100
Message-ID: <81E4A2BC03CED111845100104B62AFB58247E9@stagecoach.bts.co.uk>
To: "'w3c-wai-ig@w3.org'" <w3c-wai-ig@w3.org>
I'm going to comment on this document in several parts....

The case for image scaling being a benefit is flawed.

A larger image in itself will improve readability, but
not because of greater detail, but rather because it allows
someone with poor eyesight to see the same level of detail
as someone with good vision would see on a smaller image.

In fact, if I look at figure 1.1 without my glasses, the
pixellated image is easier to see than the detailed image,
because the pixellation results in heavy black outlines.

Image scaling can improve readability of technical diagrams
for all users.

In principle, vector formats can reduce the volume of 
transmitted data and therefore improve accessibility to
people who can't afford high bandwidth connections, however,
there have been requests for data compression on the SVG
list, suggesting that real life SVG is fairly bloated.
Received on Monday, 17 July 2000 08:48:28 UTC

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