[Insight-users] ConfidenceImageFilter

[Samuel Rodríguez Bescos]

Hi,

Thanks for adding the new function. I think that It is going to be very
usefull.

Sam

----- Original Message -----
From: "Luis Ibanez" <luis.ibanez@kitware.com>
To: "Samuel Rodríguez Bescos" <srodrigu@gbt.tfo.upm.es>
Cc: <insight-users@public.kitware.com>; "Miller, James V (Research)"
<millerjv@crd.ge.com>
Sent: Thursday, November 14, 2002 8:38 PM
Subject: Re: [Insight-users] ConfidenceImageFilter


>
> Hi Samuel,
>
> As suggested, a method was added to the
> ConfidenceConnectedImageFilter that allows
> to define the size of the initial neighborhood
> over which the mean and variance around the
> seed point will be computed.
>
> Now you can invoke:
>
>   confidenceFilter->SetInitialNeighborhoodRadius( 5 );
>
> The default value is still=1.
>
>
> You can in principle adventure with moderate values
> of the radius (lets say 10~20 pixels). This shouldn't
> have much of a performance hit since the neighborhood
> is used only once in the initial evaluation aroud the
> seed.
>
> In fact, using a large radius should allow you to
> reduce the number of iterations required for the
> filter. Just make sure that whatever the size of the
> neighborhood is, it is fully contained inside the
> region you are intended to segment.
>
> This should make the algorithm less sensitive to
> the initial guess of the seed point.
>
> --
>
> Additionally, the
>
>      - MeanImageFunction
>      - VarianceImageFunction
>
> have now methods:
>
>       SetNeighborhoodRadius()
>
>
> Please let us know if you have further questions.
>
> Thanks
>
>
>      Luis
>
> ===============================================
>
> Samuel Rodríguez Bescos wrote:
>
> > Thanks for the information.
> >
> > Sam
> > ----- Original Message -----
> > From: "Luis Ibanez" <luis.ibanez@kitware.com>
> >
> >>Hi Samuel,
>
> >>
>
> .......
>
> >>
> >>Probably we may want to add a method:
> >>
> >>          void SetInitialNeigborhoodRadius(int)
> >>
> >>to the itk::ConfidenceConnectedImageFilter.
> >>
> >>>
> >>>
> >>>I read the information at the website but I have a question. How are
the
> >>>pixels at the neighborhood seed evualuated in the first iteration?.
What
> >>>are the mean an variance values?.
> >>>
> >>>
> >>>
> >>>Thanks in advance,
> >>>
> >>>
> >>>
> >>>Sam
> >>>
> >>>
> >>
> >>
> >>
> >
> >
>
>
>
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