[Insight-users] itk transform apply to vtk polydata

[Luis Ibanez]

Hi Flavio,



                   It is your lucky day !  :-)


We recently committed an example to InsightApplications, illustrating
how to do exactly that.

Please look at the code in:


                InsightApplications/Auxiliary/vtk

and the files:

                vtkRegistrationMonitor.cxx
                vtkRegistrationMonitor.h

                itkRegisterITKMonitorVTK.cxx


The itkRegistrer..cxx file performs a 3D registration.
It sends Iteration events that are received by the
vtkRegistrationMonitor, which in its turn updates the
visualization of two polydata surfaces extracted from
the fixed and moving images by using the vtkContour
filter.


the usage should be as simple as:


itkRegisterITKMonitorVTK  fixedImage movingImage outputDir/outputimage

Note that you MUST explicitly add the directory of the output image.

This is because, as a bonus, the application saves into png files
screenshots of the visualization at every 10 iterations. These PNG
files will be saved in the "outputDir" directory.



    Please give it a try and let us konw if you
    find any problems,



       Thanks


          Luis


------------------
flavio wrote:
> hi
> I wrote e MR registration program, between two mri, that return a 
> versorRigid3DTransform.trf.
> I want to use this transform to move a geometric object associeted with 
> the registration's moving image and display it with vtk but I don't 
> understand how to convert itk
> transfom to vtk coordinate system.
> How I should use rotation(get with GetMatrix) and translation  in order 
> to have the right position in vtk space?
> 
> thanks a lot
> Flavio Simonetti
> 
> 
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