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Fwd: another filter to consider?

From: Doug Schepers <schepers@w3.org>
Date: Sat, 16 Apr 2011 13:08:06 -0400
Message-ID: <4DA9CCF6.5050709@w3.org>
To: "public-fx@w3.org" <public-fx@w3.org>, ddailey <ddailey@zoominternet.net>
Forwarding to FXTF list, since we are now working on filters as a joint 
SVG-CSS project.

-------- Original Message --------
Subject: 	another filter to consider?
Resent-Date: 	Sat, 16 Apr 2011 15:57:01 +0000
Resent-From: 	www-svg@w3.org
Date: 	Sat, 16 Apr 2011 11:53:55 -0400
From: 	David Dailey <ddailey@zoominternet.net>
To: 	<www-svg@w3.org>

Internet Explorer/ HTML/CSS has had, for at least 10 years, something
present, I think, in versions 5 through 9, a wave filter. See

http://srufaculty.sru.edu/david.dailey/javascript/ani/waves.html .

If you don’t have IE, basically, it allows sinusoidal distortion of an
image (until today I always used jpgs but today I discovered that it
also works in IE9 with <img src=”file.svg”>, though the wave distortion
is applied to a pixel-based rendition of the SVG file). It’s not quite
as flexible, as I recall, as the bivariate sinusoidal wave function in
Adobe Photoshop (that allows arbitrarily many generators to be added to
the transform), but it is a step in the right direction!

Anyhow, it is more what, in SVG, we would call a “transform” than a
“filter”, but this sort of transform as well as projections (conic,
spherical, and so forth) would be nice additions as well. I think the
underlying math is probably simpler than the non-affine transforms being
discussed for SVG 2.0.

Applications are, as always, artistic, scientific and geographic.


Received on Saturday, 16 April 2011 17:08:09 UTC

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