[Insight-users] Question about SignedMaurerDistanceMapImageFilter

[anna han wan]

Thanks Brad for your relpy. But I dont have any problem with my contours
thay are connected and close and I dont want to fill the inside as I want
to have negative distance in this region.
Anna

On Thu, Apr 26, 2012 at 1:50 PM, Bradley Lowekamp <blowekamp at mail.nih.gov>wrote:

> Have you looked at filling the wholes caused by you contours with an
> algorithm such as BinaryFillholeImageFilter or a RegionGrowing methods?
> This hopefully will make the image compliant with the expected input to the
> signed distance function.
>
> Brad
>
>
>   On Apr 26, 2012, at 8:13 AM, anna han wan wrote:
>
>  Hi
>
> I am using SignedMaurerDistanceMapImageFilter to compute the distance map
> of my 3D images in which I have shapes like empty spheres and cubes(only
> the contour).
>
> My question is similar to the question asked in
> http://www.itk.org/pipermail/insight-users/2007-September/023496.html.
>
> I want to have negative distance values inside the sphere and positive
> outside the sphere knowing that I don’t want to fill in my contour.
>
> Is there any way to do that?
>
> Also what’s the role of function setInsideIsPositive ? can you give me
> more explanation that the one provided  in the class number definition?
>
> I believe this toggles when the inside is positive, and the outside
> negative and visa versa.
>
>  Thanks
>
> Anna.
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>  ========================================================
>
> Bradley Lowekamp
>
> Medical Science and Computing for
>
> Office of High Performance Computing and Communications
>
> National Library of Medicine
>
> blowekamp at mail.nih.gov
>
>
>
>
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