[Insight-users] ITK Polygon representation

[Ofri Sadowsky]

OK. Let me see if I get this right.

1. I should create a Mesh of dimension 2 and some arbitrary PixelType (for
now I'm only interested in the coordinates of the vertices, and
I don't want to store any additional information).
2. I have to create a PolygonalCell using the Mesh's CellType.
3. Somehow, I have to add points to the PolygonalCell. The class provides the
methods SetPointIds with PointIdConstIterator parameters.
But I am still puzzled about how to get point-id's and where to take the
iterator from. This is as far as I could track the documentation.

Ofri.


Luis Ibanez wrote:

> Hi Ofri,
>
> The ImageRegion class is specifically intended to support
> the streaming capabilities of ITK image filters. For this
> reason it only provides rectangular N-D regions.
>
> You may want to take a look at the itk::Mesh class.
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1Mesh.html
> This is the data structure intended for representing
> geometrical objects.
>
> Another option is the family of SpatialObjects
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1SpatialObject.html
> that you can find in the Insight/SpatialObject directory.
>
> Please let us know if you have further questions.
>
> Thanks
>
> Luis
>
> ======================================
> Ofri Sadowsky wrote:
> > Hi Everyone,
> >
> >
> > I am trying to define a polygonal ROI object as part of an initial image
> > segmentation. I looked at the ITK doumentation for itk::Region,
> > itk::ImageRegion, itk::MeshRegion, but they don't seem to provide what
> > I need. Does ITK have a class for simple (planar) polygons? Is there an
> > associated iterator for a plygonal region?
> >
> > Thanks,
> >
> > Ofri Sadowsky.
> >
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> >