[Insight-users] GrayscaleErodeImageFilter and boundary

[Yann GAVET]

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very good, thank you.

Miller, James V (Research) wrote:

>I modified the superclass so that a boundary condition can be
>set by the user.  See MorphologyImageFilter::OverrideBoundaryCondition().
>
>I changed the default boundary conditions used by the dilation filters to be
>NumericTraits<>::NonpositiveMin() and NumericTraits<>::max() for erosion
>filters.
>
>
>
>-----Original Message-----
>From: Miller, James V (Research) 
>Sent: Friday, April 30, 2004 12:45 PM
>To: 'Yann GAVET'; insight-users at itk.org
>Subject: RE: [Insight-users] GrayscaleErodeImageFilter and boundary
>
>
>The morphology filters default to using a constant (zero) 
>boundary condition.  
>
>I can look into adding a capability to override the default 
>boundary condition.
>
>In the short term, you can edit itkMorphologyImageFilter.txx and 
>change the boundary that is set up at the beginning of the
>ThreadedGenerateData() method.
>
>Jim
>
>-----Original Message-----
>From: Yann GAVET [mailto:yann.gavet at univ-st-etienne.fr]
>Sent: Friday, April 30, 2004 9:08 AM
>To: insight-users at itk.org
>Subject: [Insight-users] GrayscaleErodeImageFilter and boundary
>
>
>Hi all.
>
>I cant find how to manage the behavior of the outside of my image with 
>grascale erode and dilate filters.
>I used :
>typedef itk::ConstantBoundaryCondition< InputImageType > 
>BoundaryConditionType;
>typedef itk::ConstShapedNeighborhoodIterator< InputImageType,
>                        BoundaryConditionType > 
>ShapedNeighborhoodIteratorType;
>
>in the example given in ShapedNeighborhoodIterator1, and it works pretty 
>well. But how can I set the boundary conditions directly from the filter 
>(ie. grayscale or binary image filter)?
>
>Do I have to do code erosion and dilation by hand ?
>
>regards.
>Yann
>
>  
>

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