[Insight-users] ConfidenceConnectendImageFilter: Number of Iterations

[Luis Ibanez]

Hi Zein,

"3" is a good number of iterations
for a typical CT image.

It all depends on how noisy your image is.

It is a good practice to apply a smoothing
filter before using the ConfidenceConnectedImageFilter.

Good options are:

- CurvatureFlow
- GradientAnisotropicDiffussion
- CurvatureAnisotropicDiffusion

This is illustrated in the SoftwareGuide
http://www.itk.org/ItkSoftwareGuide.pdf
Section 8.1.3   pdf-page 253.

Note that this is not a method of convergent
nature. That is, there is no reason to expect
that more iterations will result in a compact
region being selected.

So, 3 to 5 iterations are a good number of iterations
to start experimenting, but make sure that you try
several combinations before sticking to a particular
value.


The Eeasy way to figure this out:

    Make a cup of coffee and play with the
    RegionGrowing example in :


   InsightApplication/RegionGrowingSegmentation



   Regards,


     Luis


-----------------------
salah wrote:
> Hello,
> 
> what could be a good choice for the number of iterations 
> to be used with the ConfidenceConnectendImageFilter.
> 
> Thanks,
> Zein
> 
> ->8<------------->8<------------->8<------------->8<------------->8<------------->8<-
> Zein I. Salah 
> University of Tübingen, WSI-GRIS, Sand 14, 72076 Tübingen 
> Email: salah@gris.uni-tuebingen.de
> Tel.: (07071) 29 75465 (GRIS),           Fax: (07071) 29 54 66
> 
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