[Insight-users] Crash in ShapeDetectionLevelSetImageFilter

[Nils Hanssen]

Hi Luis,

I am using the 1.2.0 web release.

Regards,
Nils

> -----Original Message-----
> From: insight-users-admin at itk . org 
> [mailto:insight-users-admin at itk . org]On
> Behalf Of Luis Ibanez
> Sent: Tuesday, July 08, 2003 3:55 PM
> To: Nils Hanssen
> Cc: Insight-users at public . kitware . com
> Subject: Re: [Insight-users] Crash in 
> ShapeDetectionLevelSetImageFilter
> 
> 
> 
> Hi Nils,
> 
> Are you using a very recent checkout of ITK  ?
> 
> The level set filters have been reworked in
> recent days, so it will help us to know if you
> are experiencing this behavior with the current
> version or with the version as it was two weeks
> ago (or before that).
> 
> Please let us know,
> 
>     Thanks
> 
> 
>       Luis
> 
> 
> ------------------------
> Nils Hanssen wrote:
> > Hi,
> >  
> > I am trying to understand the behaviour of the ShapeDetectionLSIF.
> > Therefore, I set the propagation-weighting to zero. By setting the 
> > curvature-weighting to a value of one I would expect that 
> the inital 
> > surface is shrinking to a point (I set the MaxRMSError to 
> zero) and the 
> > number of iterations very high.
> >  
> > The filter is crashing in
> > SegmentationLevelSetFunction<TImageType, TFeatureImageType>
> > ::PropagationSpeed(const NeighborhoodType &neighborhood, const 
> > FloatOffsetType &offset) const
> > [...]
> > -->  else return ( 
> static_cast<ScalarValueType>(m_SpeedImage->GetPixel(idx)) ); 
> // crashing here
> > [...]
> >  
> > When I set the propagation-weighting to - for instance - 0.0001 the 
> > filter is not crashing, but the contour is not shrinking 
> according to 
> > the mean curvature.
> >  
> > Is that the correct behaviour of the filter?
> >  
> > I would appreciate any suggestions. Thanks!
> >  
> >  
> > Regards,
> > Nils
> >  
> > 
> > -------------------------
> > Nils Hanssen
> > Surgical Systems Laboratory
> > research center c ae sa r
> > Ludwig-Erhard-Allee 2
> > 53175 Bonn
> > fon: +49-228-9656-197
> > fax: +49-228-9656-117
> > ___http://www . caesar . de/ssl_
> > 
> > 
> >  
> 
> 
> 
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