[Insight-users] Creating and Using Spatial Objects from Labeled Images

[lynx.abraxas at freenet.de]

Hi Neal,


If  you  want  orientations, sizes, surfaceareas and such from labeled objects
itkLabelImageToShapeLabelMapFilter from the  contribution  of  G.  Lehmann  is
exactly  what  you  want.  The  IJ  article  discribes  most  of the available
attributes the filter can evaluate. GetPerimeter() can be found  only  in  the
examples of that contribution. It calculates the surface area.
What  Do you mean by spatial objects? If you want to create a mesh have a look
at Bills example:
http://www.vtk.org/Wiki/Create_cubes_from_labeled_volume_data

Lynx

On 11/08/09 16:20:31, Neal R. Harvey wrote:
> I would like to be able to start using more of the ITK functionality,  
> with regard to registration.
>
> In particular, I would like to register objects that I have segmented.
>
> The result of the segmentation is a labeled connected component image
> (created using  ConnectedComponentImageFilter followed by
> RelabelComponentImageFilter).
>
> Now, I would have thought that the next step would be to create a  
> collection of spatial objects
> and calculate some characteristics of these objects (such as  
> orientation,  etc.) that might be useful
> in the subsequent registering of the objects.
>
> However, regarding this step of taking the labeled connected component  
> image and creating the
> spatial objects, I can't seem to find any good documentation for doing  
> that. I would have thought
> that this was quite common practice and there would be ample tools and  
> associated documentation.
> However, I have come up short so far in my searches.
>
> I found a document entitled "Label Object Representation and  
> Manipulation with ITK" by G. Lehmann,
> which I thought was going to be helpful. But, it hasn't so far.
>
> Any help with this would be much appreciated.
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