On Fri, 15 Oct 2004, Ian Ollmann wrote:
[...]
> Where possible, a better approach is to do the linear pass first, then
> rewrite the non-linear pass so that it is linear.
And if you have arbitrary amounts of programmer time to save even more
runtime, you can merge horizontal and vertical passes along the lines of
this (Gaussian blur example):
http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf
This is generally a nice technique because it enables you to do
destructive operations sort of in place (a bit of auxiliary storage is
needed, though).
Holger
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