I need to correct the formula for genus-zero meshes in my previous email
from: #faces + #edges - #points = 2
to: #faces - #edges + #points = 2
I'm sorry for the confusion.
Regards,
Stefan
On Fri, Sep 21, 2012 at 10:25 AM, Stefan Dänzer <[email protected]>wrote:
> Hi all,
>
> I hope the preparations of the new MITK Release are going well. I wish you
> the best of luck for the new Release!
>
> I've been working on the current trunk version of mitk (git hash:
> 0bc212eb953e81959cd7ce943ed70d3e7d8387cd) on a linux (ubuntu 12.04 x86_64)
> machine in superbuild using VTK 5.10.
>
> I'm experiencing problems when generating an Isosurface (polygonal mesh)
> out of a segmentation. The problem is that for a closed surface there are
> some ghost points/edges/triangles, while I need a closed surface which is
> genus-zero (satifies: #faces + #edges - #points = 2)
> I have tried the following:
>
> 1. Generating an Isosurface via the Context Menu of the node (binary
> segmentation) in the dataManager gives a very poor surface reconstruction,
> see attachment "c3.vtk".
> 2. Generating an Isosurface with the Isosurface plugin gives a visually
> good looking result, but there are still some ghost points/edges/triangles,
> see attachment "c3_iso.vtk".
>
> I've worked around the problem the following way for now:
> Using the MeshDecimation plugin in decimatePro mode with minimal mesh
> reduction percentage (1%) gives a "correct" surface without ghost p/e/ts,
> see attachment "c3_iso_decim.vtk". However this is rather a misusage of
> mesh decimation to correct the given mesh topology.
>
> I have also tried to use vtkCleanPolyDataFilter in my own software to
> eliminate the ghost p/e/ts without success.
>
> Is there another possibility to generate a clean genus-zero surface in
> MITK.
>
> Regards,
>
> Stefan
>
> --
> Stefan Daenzer
> Körnerplatz 8
> 04107 Leipzig
>
> Tel.: +49-157-84993879
>
> "Work like you don't need the money, love like you've never been hurt and
> dance like no one is watching." - Randall G Leighton
>
--
Stefan Daenzer
Körnerplatz 8
04107 Leipzig
Tel.: +49-157-84993879
"Work like you don't need the money, love like you've never been hurt and
dance like no one is watching." - Randall G Leighton
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