[Insight-users] ITK Watershed Filter

[Iván Macía]

Hi Steffi,

Use a pipeline with

Original image -> GradientAnisotropicDiffusionImageFilter ->
GradientMagnitudeImageFilter or
GradientMagnitudeRecursiveGaussianImageFilter -> watershed filter

Note that the output of the WatershedImageFilter is an image of labels that
uses unsigned shorts as pixel type and with the same dimension as the input
image. You can obtain consecutive labels by using the
RelabelComponentImageFilter. You may also map the labels to RGB values using
the Functor ScalarToRGBPixelFunctor (I haven't tried this yet myself) with
the UnaryFunctorImageFilter.

That should work

Iván 

-----Mensaje original-----
De: insight-users-bounces+imacia=vicomtech.es at itk.org
[mailto:insight-users-bounces+imacia=vicomtech.es at itk.org] En nombre de
Steffi Meyer
Enviado el: viernes, 27 de enero de 2006 15:46
Para: insight-users at itk.org
Asunto: [Insight-users] ITK Watershed Filter

Hi all,

I have some problems with the itk watershed filter. My input is a 3D volume
(grayscale intensities), so no RGB. My problem is how to transfer the
watershed filter to grayscale intensities? The
VectorGradientAnisotropicDiffusionImageFilter has a pendant for non-vector
images: GradientAnisotropicDiffusionImageFilter, but the
VectorGradientMagnitudeImageFilter (SetUsePrincipleComponents)? Is it
GradientMagnitudeImageFilter? Perhaps someone can paste some source code
fragments? Would be very nice. Thanks!
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