W3C home > Mailing lists > Public > w3c-wai-ig@w3.org > April to June 2004

Re: alt text & punctuation - best practice?

From: David Woolley <david@djwhome.demon.co.uk>
Date: Wed, 23 Jun 2004 07:57:08 +0100 (BST)
Message-Id: <200406230657.i5N6v8201902@djwhome.demon.co.uk>
To: w3c-wai-ig@w3.org

> If it is blurred at its intended size, zooming in will only make it worse.

It is not a fault for raster image text to be blurred at its intended
resolution; it is how dot matric characters can work at all without
looking pixellated.  In fact, anti-aliasing is itself a blurring
(low pass spatial filter, operation, and that is generally considered
desirable).  My argument is that oversized pixellated images, when
blurred to the same relative level are no less readable than would
be the intended size viewed by someone with good vision.

There may be issues that the perception process for large print is
fundamentally different, e.g. because the whole image cannot be on
the fovea at the same time, and because non-integral scaling factors
do introduce artifacts.

Interestingly, I'm getting attacked from both sides here, as someone
else is suggesting that I'm totally against text as images (I do
tbink that most web use of them is misuse of the technology - it needs
a powerful graphics language, not a back with bitmaps, to do it
properly - so that the text is really there but transformed in the user
agent).
Received on Wednesday, 23 June 2004 02:57:12 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 5 February 2014 07:13:33 UTC