[vtkusers] Generate contours around the segmented regions

[Jérôme]

Hi Yang,

Indeed, the vtkContourFilter is doing exactly what you are asking for : it
encloses the binary region inside a contour/surface. If you need to check
the segmentation result on each slice, you can
- either use a vtkCutter after the vtkContourFilter,
vtkImporter2 -> vtkContourFilter -> vtkCutter
- or apply vtkContourFilter on an extracted slice of your input volume (eg.
vtkExtractVOI).
vtkImporter2 -> vtkExtractVOI ->vtkContourFilter

(assumption made that vtkImporter2 is a sort of reader that imports your
binary volume)

I don't know which method is the most efficient.

HTH,
Jerome

2011/2/24 Xiaopeng Yang <yxp233 at postech.ac.kr>

> Hello VTK users,
>
>
>
> After segmentation, I would like to generate contours around the segmented
> regions. And then visualize the contours over the original images. However,
> The generated “contours” look like 3D surface, not 2D contours (see the
> following image). Do you guys know what’s going on?
>
>
>
> The code for generating contours:
>
>
>
> vtkContourFilter * contour = vtkContourFilter::New();
>
> contour->SetInput( vtkImporter2->GetOutput() );
>
> contour->SetValue(0, 128); // edges of a binary image with values 0,255
>
>
>
>
>
> Thanks a lot,
>
> Yang
>
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