[Insight-developers] strange background values and BinaryErodeImageFilter

[Gaetan Lehmann]

I forgot the modified files (renamed BinaryErodeImageFilter):
http://voxel.jouy.inra.fr/itkBinaryErodeImageFilter.h
http://voxel.jouy.inra.fr/itkBinaryErodeImageFilter.txx

BTW, can't we use FastIncrementalBinaryDilateImageFilter instead of  
BinaryDilateImageFilter and this class instead of current  
BinaryErodeImageFilter ?

Gaetan

On Thu, 25 Aug 2005 13:41:52 +0200, Gaetan Lehmann  
<gaetan.lehmann at jouy.inra.fr> wrote:

> Hi,
>
> I have modified FastIncrementalBinaryDilateImageFilter to implement an
> efficient binary erosion filter.
>
> I'm not able to easily reproduce the way BinaryErodeImageFilter set the
> background value. In fact, it seems to be quite strange.
> I have attached 3 files :
>   + bw.png is the source image. There is 3 colors in it. The white is the
> foreground value for erosion while gray and black are
> both background.
>   + out-current.png is the result of a binary erosion with a circular
> kernel with a radius of 15
>   You can notice that the eroded disk in the middle of the shape is grey
> while the others eroded pixels are black. Also, the 2
> gray shapes in the top of the image are modified.
>   + out-fast.png is the result of the same erosion with the modified
> FastIncrementalBinaryDilateImageFilter. The white shape is
> the same (great !). All eroded pixels are black, shapes at the top of the
> image are not modified, and the gray disk is still
> visible inside the white shape.
>
> Can we use the second behavior for the binary erode image filter ? I find
> it really more consistent than the current behavior, and it should avoid
> to spend time to reproduce a quite strange behavior.
>
> Regards,
>
> Gaetan
>



-- 
Gaetan Lehmann <gaetan.lehmann at jouy.inra.fr>
Tel: +33 1 34 65 29 66
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
Web: http://voxel.jouy.inra.fr