[SciPy-Dev] Two dimensional Savitzky-Golay least-square filtering.

[Davide Lasagna]

Hi all,

I have added to the Scipy Cookbook a code that performs filtering of 2D data
using the Savitsky-Golay algorithm, which is based on local least-square
fitting with bivariate polynomials. It also allows to compute the first
derivatives of the 2D data, but i'm going to add higher order derivatives
soon. It works quite well and the code is reasonably fast for "large" data
sets. It would be nice to have this function available in scipy.interpolate,
and i'm asking to the list if it is worth improving the code and adding
documentation. To have an idea of what it can be achieved have a look at the
attachments in the cookbook.


Cheers

Davide Lasagna

PhD in Fluid Dynamics
Politecnico di Torino, Italy
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