[vtkusers] Build 3D Mesh from vtkImageData using vtkMarchingCubes - holes filling ?

[Bill Lorensen]

Marching Cubes is the correct filter and your results look good
(except for the missing slice. You could try to create a missing slice
by creating a new slice. Maybe by averaging the slice above and below
the missing slice.

Why is the data missing?

On Tue, Dec 6, 2011 at 12:03 PM, Malsoaz James <jmalsoaz at yahoo.fr> wrote:
> Dear VTK users
>
> I'm trying to build a 3D mesh from a vtkImageData using vtkMarchingCubes.
> The vtkImageData is build from a list of 2D binary slices.
>
> vtkMarchingCubes works great. But when a slice(s) is(are) missing, it
> creates a hole in the 3D mesh (see image in attachment).
>
> 1 - How can I fill this kind of hole ? Ideally, I would like to link the two
> parts of the mesh
>
> 2 - I found a solution in the use of a resampler (vtkImageResample,
> vtkImageShrink3D, don't know which one is recommanded). Unfortunately, it
> sometimes produces ugly mesh with "stair effect" when the spacing is too big
> (still there after decimate and smooth). Is it a good solution ? How to
> solve the stair problem ?
>
> 3 - Browsing the mailing list brings me to the notion of "repair hole" for
> marching cubes. I don't know a lot about it. But should I look into this ?
> Some solutions exist for this such as http://www.opentopology.org/
>
> 4 - Is vtkMarchingCubes the class I should use for my purpose or should I
> look at vtkVoxelContoursSurfaceFilter or any other filter ?
>
>
> Thank you for you help.
> Best.
>
>
>
>
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