[Insight-users] Watershed Segmentation of 3D RGB Image

[Luis Ibanez]

Hi Kevin,

Yes, you can indirectly use Watersheds on RGB images in 3D.


You will find an example on the use of Watersheds on RGB images
in the ITK Software Guide:


         http://www.itk.org/ItkSoftwareGuide.pdf


Section 9.2.2, pdf-page 359. "Using the ITK Watershed Filter".


The changes that you made to the example look fine,

I would suspect first of the process that you may be using
for reading your RGB image...

What image file format are you using ?

Are you sure that you got a segmentation fault, and not
an Exception ?



    Thanks


      Luis



----------------------
Kevin H. Hobbs wrote:

> I tried watershed segmentation on my 3D RGB image and I got a segfault.
> Is this supported?  I figure I might as well ask before I beat myself up
> too much.  I'm using the CVS version of ITK and I made the following
> changes to the example.
> 
> [khobbs at biowulf stomach_sections]$ diff
> ~/kitware/Insight/Examples/Segmentation/WatershedSegmentation1.cxx
> WatershedSegmentation1.cxx
> 81c81
> <   typedef itk::Image<RGBPixelType, 2>    RGBImageType;
> ---
> 
>>  typedef itk::Image<RGBPixelType, 3>    RGBImageType;
> 
> 83,85c83,85
> <   typedef itk::Image<VectorPixelType, 2> VectorImageType;
> <   typedef itk::Image<unsigned long, 2>   LabeledImageType;
> <   typedef itk::Image<float, 2>           ScalarImageType;
> ---
> 
>>  typedef itk::Image<VectorPixelType, 3> VectorImageType;
>>  typedef itk::Image<unsigned long, 3>   LabeledImageType;
>>  typedef itk::Image<float, 3>           ScalarImageType;
> 
> 
> 
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