[Insight-users] Bug in itkImageRegion?

[Estanislao Oubel]

Thanks Sergio and Dženan, you confirm what I thought.
My problem was that I had a region defined in word coordinates, and a 
point outside this region (always in WC)
was inside when passing to continuous indexes. This made my program fail.

stan




Le 10/12/2010 12:31, Dženan Zukić a écrit :
> The pixel centered on (10,10,10), has extent 
> ([9.5,10.5],[9.5,10.5],[9.5,10.5]). So it is not an error. Similarly, 
> pixel (0,0) has extent ([-0.5,0.5],[-0.5,0.5]). This comes from DICOM 
> specification logic of interpreting pixel locations as centers of 
> pixels/voxels.
>
> Dženan
>
> On Thu, Dec 9, 2010 at 14:50, Sergio Vera <sergio.vera at alma3d.com 
> <mailto:sergio.vera at alma3d.com>> wrote:
>
>     Hi Estanislao
>
>     I'm just thinking that this behavior is related with the voronoi
>     region that a pixel defines (see pag 40 of the ITK Sotfware Guide)
>     maybe a pixel at 9.5, 9.5, 9.5 has a voronoi area that is inside
>     the region you are defining...
>
>     Maybe anyone more experienced with the tookit can confirm/deny this.
>
>     Regards
>
>     On Wed, Dec 8, 2010 at 12:02 PM, Estanislao Oubel
>     <stan.oubel at gmail.com <mailto:stan.oubel at gmail.com>> wrote:
>
>         Hi all,
>
>         I've defined a region of size = [10 10 10] starting at index =
>         [10 10 10].
>         The method IsInside returns true for a continuous index = [9.5
>         9.5 9.5], but I would have expected a false value since this
>         index  is (strictly) outside the region. So I'm not sure if
>         it's a bug or I'm misinterpreting the result ...
>
>         I've found a similar post here:
>
>         http://www.itk.org/pipermail/insight-users/2002-September/000984.html
>
>         I've attached the source files I used for testing (itk 3.20)
>
>         Thanks,
>
>         stan
>
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>
>     -- 
>     Sergio Vera
>
>      Alma IT Systems
>      C/ Vilana, 4B, 4º 1ª
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>
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