[vtk-developers] vtkImageWeightedSum

David Gobbi dgobbi at atamai.com
Fri Apr 21 16:42:11 EDT 2006

Hi Sven,

You could use a vtkCutter to cut through the polydata that the 
segmentation produces, and then draw the resulting polyline on the the 
image (using a vtkDataSetMapper for the polyline and a vtkImageActor for 
the image).  That would probably be the easiest method, if having just 
an outline drawn around the region is good enough.

Doing it with stencils would also work, but vtkPolyDataToImageStencil is 
not completely robust.

 - David

Sven Prevrhal wrote:
> Hi David,
> I segment a piece of bone from a 3D Medical CT dataset and want to create a
> polgonal VOI from that (should be easy). Then I would like to show the VOI
> in 2D slices of the dataset. I guess I can do that with vtkImageBlend or
> with stenciling. 
> Sven
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