[SciPy-User] Gaussian filter on an angle

Gary Ruben gruben@bigpond.net...
Fri Jun 4 08:11:07 CDT 2010

I'm probably misunderstanding what you want because I don't know what an 
angle field is, but maybe you want to radon transform (or inverse radon 
transform) the data first, then apply a 1D filter before inverse 
transforming. If you have access to Matlab you could try the radon and 
iradon functions. I have some Python code for doing these, part of which 
has licensing problems wrt getting it into scikits.image.

Apologies if I've completely misunderstood what you want to do,


Matthieu Brucher wrote:
> Hi,
> I'm trying to blur an angle field, but it's not easy ;)
> Applying gaussian_filter (from ndimage) on the sinus and the cos is
> not enough to have a smooth angle field, and of course applying
> gaussian_filter directly on the angle field does not yeild
> satisfactiry results.
> Does anyone know of a function (even if it not in Python yet) that
> could gaussian filter an angle field? Something like a Riemanian
> filter (instead of an Euclidian one)...
> Matthieu

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