[Insight-users] Crash in ShapeDetectionLevelSetImageFilter

[Luis Ibanez]

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_
> 
> 
>