[GRASS-user] adaptive gaussian filter

[Jachym Cepicky]

Interesting, thanks for the hint

J

st 29. 7. 2020 v 14:24 odesílatel Maris Nartiss <maris.gis at gmail.com> napsal:
>
> Something like anisotropic diffusion described by Perona P. and Malik
> J. 1990? https://en.wikipedia.org/wiki/Anisotropic_diffusion
> I do have a working C module performing aforementioned noise reduction
> (with optional Tukey's conductance function according to Black et al.
> 1998) but I haven't found time (and need) to clean it up + write
> documentation to make it production ready. If you are working on a
> publication where it would be useful, I'm in.
>
> Māris.
>
> Perona P. and Malik J. 1990. Scale-space and edge detection using
> anisotropic diffusion. IEEE transactions on pattern analysis and
> machine intelligence, 12(7).
> Black M.J., Sapiro G., Marimont D.H. and Heeger D. 1998. Robust
> anisotropic diffusion. IEEE transactions on image processing, 7(3).
>
> trešd., 2020. g. 29. jūl., plkst. 14:22 — lietotājs Jachym Cepicky
> (<jachym.cepicky at gmail.com>) rakstīja:
> >
> > Hi all,
> >
> > I would like to ask, whether there is a code or extension, which would
> > apply gaussian filtering on raster data, but with varying sigma value
> > according to one of input raster maps?
> >
> > I would like to blur raster but differently on different regions (e.g.
> > based on texture characteristics)
> >
> > Thank you
> >
> > Jachym
> >
> > --
> > Jachym Cepicky
> > e-mail: jachym.cepicky gmail com
> > URL: http://les-ejk.cz
> > GPG: http://les-ejk.cz/pgp/JachymCepicky.pgp
> > _______________________________________________
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-- 
Jachym Cepicky
e-mail: jachym.cepicky gmail com
URL: http://les-ejk.cz
GPG: http://les-ejk.cz/pgp/JachymCepicky.pgp