another filter to consider?

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.

 

Regards

David