[Insight-users] Segmentation on Volume Data.

[Luis Ibanez]

Hi Bear,

The reason why most of the examples in the ITK Software Guide
are in 2D is simply that it was easier to illustrates those
images in the book.


In practice, almost all of the segmentation and registration
methods in ITK are N-Dimensionsal. They can be instantiated
for 2D, 3D, 4D... and the only limit is the amount of memory
and computing time that you have available.


If you want to segment images from 3D Dicom slices you may
want to look at the example:

      Insight/Examples/IO/DicomSeriesReadImageWrite.cxx



and any of the following 3D segmentation applications

      InsightApplications/
              RegionGrowingSegmentation
              DeformableModelSimplexMesh
              FastMarchingLevelSet
              GeodesicActiveContour
              IBSRValidation
              LiverTumorSegmentation
              Morphogenesis
              SegmentationEditorFltkGui
              ShapeDetectionLevelSet


For an example that does exacly what you are asking, please
look at the file:


      InsightApplications/Auxiliary/vtk/
              itkReadITKImage3DSegmentShowVTK.cxx


It combines ITK and VTK, and performs the following tasks:


       1- reads a 3D volume,
       2- runs a region growing segmentation algorithms on it
       3- converts the segmented image to vtkImageData
       4- extracts the surface of vtkImageData with vtkContour
       5- displays the resulting surface overlaid on the input image


Please let us know if you have futher questions,



     Thanks



        Luis



-------------------
Bear Neural wrote:

> Hello All,
> 
> Sorry for my simple question. I found most examples in ITK software 
> guide using 2D images for segmentation. Is there any example using 3D 
> image? I have DICOM slices and would like to export to vtk by 
> itk::VTKImageExport after segmentation and then visualize it by 
> vtkContourfilter.
> 
> Thanks a lot.
> 
> NB
> 
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