[Insight-users] how to create simplex mesh from binary data

[Karthik Krishnan]

You might also consider taking the mesh to VTK land
with itk::MeshToVTKPolyData, and then decimating it
with one of the many topology preserving decimation
filters in VTK that work on triangle meshes.

There's
  vtkDecimate
  vtkDecimatePro
  vtkQuadricClustering
  vtkQuadricDecimation

Each have their own definition of the error metric, which
they try to minimize. None of those is based on a distance
between vertices though.

You can then bring the resulting mesh back from VTK to
ITK. However, at this point, your mesh is no longer
guaranteed to be a simplex mesh. So as a final step, you
can apply the TriangleMeshToSimplexMeshFilter.

HTH
-- 
Karthik Krishnan
R&D Engineer,
Kitware Inc.
Ph: 518 371 3971 x119
Fax: 518 371 3971

On Mon, Jan 19, 2009 at 4:40 PM, Ori Hay <magicdelphis at gmail.com> wrote:

>  Hi
>
>
>
> I want to create a simplex mesh from binary image (segmented volume) , with
> predefined resolution (e.g. if a voxel is 1x1x1 mm create a mesh with 5mm
> spacing between vertices)
>
>
>
> Is there a simple method for doing this ?
>
> I thought of using
>
> itk::BinaryMask3DMeshSource< BinaryImageType, TriangleMeshType >
>
> followed by:
>
> itk::TriangleMeshToSimplexMeshFilter< TriangleMeshType, SimplexMeshType >
>
> Is there a way to define the output resolution when using BinaryMask3DMeshSource
> or TriangleMeshToSimplexMeshFilter?
>
>
>
> One workaround I was thinking of is to resample the binary volume to 5x5x5
> mm voxels and create a mesh from the resample data,
>
> Does it sound wise ?
>
>
>
> Regards
>
>
>
> Ori Hay
>
> PhD. Student
>
> Tel Aviv University
>
>
>
>
>
>
>
> _______________________________________________
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> Insight-users at itk.org
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>
>
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