[Insight-users] FEM Registration : using a mesh specified in a .vtk format

[Nicholas Tustison]

Hi Jonathon,

You're correct in that a VTK mesh is incompatible with the FEM  
registration framework.  You're also right in that you probably don't  
want to change the CreateMesh method in the filter.  Unfortunately,  
the ITK mesh is also not compatible with the FEM registration class  
which actually defines its own mesh type internally.  I have code  
written by the authors of the FEM library which will convert a VTK  
mesh to a FEM-compatible mesh.  Let me know if you're interested in  
receiving a copy.

Nick Tustison


On Jan 5, 2007, at 9:45 AM, jonathan orban wrote:

> Hi,
>
>
> I'm currently using the "DeformableRegistration1" example of ITK  
> with the "FiniteElementRegistrationParameters1.txt" file. I used  
> this example on other 2D images for which I created a mesh in a VTK  
> format. I would like to use this newly created mesh to do the  
> registration. I put the name of the vtk file as an input in the  
> MeshFileName line of the parameters file but it gives me an IO  
> error ("IO error in FEM class: Error reading object from stream!").  
> So I guess that the vtk format isn't accepted by the  
> "itkFEMRegistrationFilter". Am I right?
>
> If this is true, how is it possible to use a vtk file as an input  
> mesh? I see two possible solutions for the moment:
> - Change the CreateMesh method in the  
> "itkFEMRegistrationFilter" (but I guess modifying a filter isn't  
> the most generic solution).
> - Use the ITK2VTK classes in the Insight-applications and start by  
> transforming the VTK File in a Mesh Metafile.
>
> Are these solutions correct? Do you see other solutions?
>
>
> Thanks for your time,
>
>
> Jonathan
>
>
>
> -- 
> Jonathan ORBAN
> -----------------------------------------
> Communications and Remote Sensing Lab.
> Universite catholique de Louvain, Belgium
> orban at tele.ucl.ac.be
> +32 (0)10 478074
> http://www.tele.ucl.ac.be
>
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users