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Re: New subsection in techniques doc: Accessibility Reviewed Technologies

From: Alan J. Flavell <flavell@a5.ph.gla.ac.uk>
Date: Wed, 2 Feb 2000 23:40:31 +0000 (GMT)
To: Chris Kreussling <CHRIS.KREUSSLING@ny.frb.org>
cc: w3c-wai-gl@w3.org
Message-ID: <Pine.OSF.4.21.0002022336400.23664-100000@a5.ph.gla.ac.uk>
On Wed, 2 Feb 2000, Chris Kreussling wrote:

> PNG in its full specification is a superset of both GIF and JPG:
> Anything that can be done in either can be done in PNG, and done
> better.

Then it is surprising that the PNG's own introduction makes no
such claim, indeed it states:

 The Portable Network Graphics (PNG) format was designed to replace
 the older and simpler GIF format and, to some extent, the much more
 complex TIFF format.


 Note that for transmission of finished truecolor
 images--especially photographic ones--JPEG is almost always a better
 choice. Although JPEG's lossy compression can introduce visible
 artifacts, these can be minimized, and the savings in file size even
 at high quality levels is much better than is generally possible with
 a lossless format like PNG.


Best regards
Received on Wednesday, 2 February 2000 18:40:35 UTC

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