[vtkusers] vtkDiscreteMarchingCubes 2D equivalent

[Bill Lorensen]

We never implemented a 2D version of Discrete Marching Cubes. The
Threshold/Contour should be fast, depending on how many regions you
have the segment.

Bill

On Tue, Sep 29, 2009 at 12:32 AM, Dário Oliveira <dariodisk at gmail.com> wrote:
> Dear All,
>
> I'm working with GIS applications. Segmentation in this kind of images
> usually generates a very high number of segments.
>
> I'm trying to find region boundaries based on labelled segmented
> images. I've been searching in the mailing list carefully, and one
> suggestion I found was to use vtkThreshold for each region label and
> all the visualization pipeline stuff inside a big loop. I have the
> feeling that this would be really hard to wait for.
>
> I also found a filter that seemed to be perfect:
> vtkDiscreteMarchingCubes. It does exactly what I want, but not for 2D
> images. :-/
>
> Is there any equivalent of vtkDiscreteMarchingCubes for 2D images?
> vtkContour and vtkMarchingSquares don't do exactly the same, as far as
> I know, because each contour is defined by the voxels greater than a
> given value, and I need to have each contour/boundary defined exactly
> by a given value.
>
> Anyone has any suggestion?
> Thanks!
> --
> Dário Oliveira
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