[Insight-users] Waterfall segmentation algorithm and mean curvature for mesh

[Jana Sefcikova]

Hi Alexandre,
thank you for your response.

1) Segmentation
 I am looking for some algorithm based on region growing,edge detection,
split-and merge, waterfall (
http://en.wikipedia.org/wiki/Segmentation_%28image_processing%29) or other
'shape' segmenting algorithm  for polygonal meshes (prefered data formats
obj, ply ) that could be used for segmenting mesh into 'smooth' (having
relative curvature within region under some treshold) surfaces /regions/.
Reference article could be "Partitioning 3D Surgace Meshes Using Watershed
Segmentation" by Mangan and Whitaker.

2) Curvatures
I read article in the mention journal, but i can not find there a reference
article for Meyer02  ? Which article is meant by this ?
I already tested  vtkCurvature on great part of known Stanfords polygonal
meshes  and curvatures scalar ranges are really .. really high, I would
like try other existing possibilitites before potential reimplementing or
tresholding. I will try to check mention class, thanks again.

Is there some example for computing curvature with tensors in itk ?

Best regards,
Jana

On 10 May 2012 12:11, Alexandre GOUAILLARD <agouaillard at gmail.com> wrote:

> dear jana,
>
> As far as I know, there is no waterfall based segmentation. Can you
> send me a link to the article you are thinking about?
>
> Class to compute discrete surface mesh curvature have been contributed:
> http://www.insight-journal.org/browse/publication/302
>
> and are now in ITK:
>
> http://www.itk.org/Doxygen41/html/classitk_1_1DiscreteMeanCurvatureQuadEdgeMeshFilter.html
> You can start by looking at:
>
> /Modules/Filtering/QuadEdgeMeshFiltering/test/itkDiscreteMeanCurvatureQuadEdgeMeshFilterTest.cxx
>
> you have also the possibility to compute the principal curvatures and
> work with the tensor directly.
>
> regards,
>
> alex.
>
> On Wed, May 9, 2012 at 11:14 PM, Jana Sefcikova <neollie at gmail.com> wrote:
> > Dear users,
> >
> > I would like ask whether itk supports
> > 1) some waterfall based segmentation for polygonal mesh according to
> > something like curvature or other metric
> > 2) some class for computing curvature (mean) for meshes
> > If yes,  could you share with me class names (and if some example for
> > starting point)
> >
> > Thank you
> >
> > Jana
> >
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