[Insight-users] image to mesh conversions and mesh calculations

[Arnaud Gelas]

Hi Cagatay,

If you are interesting in estimating normals, I would recommend the
following pipeline

1- BinaryMask3DMeshSource
2- NormalQuadEdgeMeshFilter
http://www.itk.org/Doxygen/html/classitk_1_1NormalQuadEdgeMeshFilter.html
You can have a look at
ITK/Modules/Filtering/QuadEdgeMeshFiltering/test/itkNormalQuadEdgeMeshFilterTest.cxx

If you are interesting in estimating curvature, I would recommend using
curvature estimators which are in ITK:

DiscreteGaussianCurvatureQuadEdgeMeshFilter
DiscreteMeanCurvatureQuadEdgeMeshFilter

Best,
Arnaud


On Tue, Feb 21, 2012 at 7:36 PM, cagatay bilgin <bilgincc at gmail.com> wrote:

> I am trying to find the best way to convert
> a binary image to a mesh that I can use to
> calculate the normals, delete a couple of
> these points based on the normals/curvature
> and then convert the mesh back to a binary
> image.
>
> From what I have seen the following pipeline
> should work in this case:
>
> i) itkBinaryMask3DMeshSource.h
> ii) itkTriangularMeshToSimplexMeshFilter
>
> iii)some processing based on the normals of the simplex mesh.
> based on these calculations I will delete some of the nodes
> and hopefully disconnect the mesh
>
> iv) itkSimplexMeshToTriangleMeshFilter
> v) itkTriangleMeshToBinaryImageFilter
>
> The process I will be performing in the thrid step is this:
> http://pointclouds.org/documentation/tutorials/pfh_estimation.php
>
> I am curious if there is a better/shorter pipeline I can
> use. I have seen quad meshes for normal calculations.
> Is there a reason to use one or the other ?
>
> Cagatay
>
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-- 
Arnaud Gelas, Ph. D.
Avenue Beauregard 30
CH-1700 Fribourg
Switzerland
cellphone: (+41) 76-635-08-66
phone: (+41) 26-535-44-36
arnaudgelas at gmail.com
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