[Insight-users] itkGeodesicActiveContourLevelSetImageFilter extract outer contour

[Luis Ibanez]

Hi Matthias,



a) for an ITK + VTK solution:

You may want to look at the examples:

    itkReadITKImage3DSegmentShowVTK.cxx
    itkReadITKImageSegmentShowVTK.cxx


They show how to display the contour of a segmentation
on top of the original image by using an ITK to VTK
image conversion and the vtkContour filter.



b) for a full ITK solution

If you want to do the following:

    - Threshold the output level set to produce a binary image.

    - Use the SimpleContourExtractorImageFilter:
http://www.itk.org/Insight/Doxygen/html/classitk_1_1SimpleContourExtractorImageFilter.html
       to generate a 1-pixel wide contour

    - then connect the input image and the contour image to
      the label overlay image filter:
http://www.itk.org/Insight/Doxygen/html/classitk_1_1LabelOverlayImageFilter.html



Regards,


    Luis


---------------------
Matthias Ebert wrote:
> Hi everybody,
> 
> i am using the itkGeodesicActiveContourLevelSetImageFilter to segment a
> region in my images.
> In the GeodesicActiveContourImageFilter.cxx example the resulting image
> is the whole segmented region.
> Thats nice so far but i only want the outer contour of my segmented
> region, to draw it in the original image.
> For the contour is concave it is difficult to iterate through the binary
> image an extract it.
> Is there a good way to extract the outer contour and draw it in my
> original image?
> 
> Thank You
> 
> Matthias
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
>