[Insight-users] 3D Segmentation Mask

[Luis Ibanez]

Hi Cameron,

It seems that what you are looking for is a VTK interactive
method for selecting a region of interest of your 3D image,
that will be later passed to an ITK segmentation pipeline.

Is that correct ?

If so, one thing you could easily use is the

       vtkAffineWidget
http://www.vtk.org/doc/nightly/html/classvtkAffineWidget.html

or the

       vtkBoxWidget
http://www.vtk.org/doc/nightly/html/classvtkBoxWidget.html

or a combination of 3 ImagePlaneWidgets:
http://www.vtk.org/doc/nightly/html/classvtkImagePlaneWidget.html


That you will find the widgets under


                 VTK/Widgets/


You could interactively manipulate their handles until you have
captured the region of interest and then (programatically)
you could query the current state of the widget in order to
deduce the coordinates of its corners.

The coordinate of the region of interest could then be passed
as a Region to the itkRegionOfInterestImageFilter.




     Regards,


        Luis



----------------------
Cameron Burnett wrote:
> Hi,
> 
> Currently I'm trying to figure out how to create a mask for 
> segmentation. The way i'm thinking of doing it is using a 
> MaskImageFilter to mask my DICOM object with a vtkActor cube object that 
> I generated just from points. To do that I need to figure out 1 of 2 
> things (due to the fact that you can't plug an actor straight into the 
> mask filter). Either I replace that vtkActor with some sort of ITK box 
> primitive that can go straight into the filter, OR I somehow convert the 
> object into the correct itk image form.
> 
> Does that make sense?? Generally I just want to segment only the stuff 
> inside a box that I can move around. That's the simple way of putting it.
> 
> I was looking at this example in the Insight Applications  
> "vtkPolyDataToITKMesh.cxx" , but I'm not sure thats what I'm after. Also 
> I found a bit on the mailing list about 
> "TriangleMeshToBinaryImageFilter" but that has just left me even more 
> confused.
> 
> Is there an easier way to create an interactive/movable/scaleable 3D 
> mask, other than a cube represented by a vtkActor? What sort of stuff 
> should I be looking to use for this approach (or a similar one) ??
> 
> Thanks in advance,
> Cameron.
> 
> 
> 
> 
> 
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