Non Local Means filter behavior

[Sidnei Paciornik]

Dear All, specially Thorsten Wagner,
I have identified a situation in which, apparently, the NLM filter cretes noise
in an image, instead of reducing it.
Specifically, this happens for color images for which Auto Sigma = 6 and we used
Sigma = 3. An example can be found in the following Dropbox folder:
ImageJ List

 Shared with Dropbox

 dropbox.com
 

Any comments?
Thank you very much!Prof. Sidnei PaciornikGrupo de Análise de Imagens e
Microscopia Digital
DEQM - Departamento de Engenharia Química e de Materiais
PUC-Rio

Rua Marquês de São Vicente 225
Prédio Leme, Sala 501L
Gávea - Rio de Janeiro - RJ
22451-900 - Brasil
tel: [phone]

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[jumpfunky]

Dear Sidnei,

unfortunately your link to the example image does not work. Could you
attach it to your email or try it again via dropbox?

Best,
Thorsten
Am Sonntag, den 13.11.2016, 16:36 +0000 schrieb Sidnei Paciornik:

> Dear All, specially Thorsten Wagner,
> I have identified a situation in which, apparently, the NLM filter
> cretes noise
> in an image, instead of reducing it.
> Specifically, this happens for color images for which Auto Sigma = 6
> and we used
> Sigma = 3. An example can be found in the following Dropbox folder:
> ImageJ List
>
>  Shared with Dropbox
>
>  dropbox.com
>  
>
> Any comments?
> Thank you very much!Prof. Sidnei PaciornikGrupo de Análise de Imagens
> e
> Microscopia Digital
> DEQM - Departamento de Engenharia Química e de Materiais
> PUC-Rio
>
> Rua Marquês de São Vicente 225
> Prédio Leme, Sala 501L
> Gávea - Rio de Janeiro - RJ
> 22451-900 - Brasil
> tel: [phone]
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html