[ITK] [ITK-users] FEMRegistration

[Martin Genet]

Thanks a lot, Matt. I'm still a little confused though. I can access the 
mesh using:
> typedef itk::fem::FEMObject< 2 > MeshType;
> MeshType::Pointer mesh =  registrationFilter->GetInputFEMObject();

However, when trying to create a writer using
 > typedef itk::MeshFileWriter< MeshType > MeshWriterType;
 > MeshWriterType::Pointer meshWriter = MeshWriterType::New();
, it complains that InputMeshType (itk::fem::FEMObject< 2 > I guess) is 
missing a lot of stuff (e.g., RegionType, PixelType, GetPoints, etc.).

If I use
 > typedef itk::Mesh< float, 2 > MeshType;
instead, I can define the writer, but then I can't access the mesh from 
the registration filter of course.

Is there a way to write registrationFilter->GetInputFEMObject() into a 
vtk file? Thanks again, and sorry again for the confusion.

Martin

On 09/22/2014 10:54 PM, Matt McCormick wrote:
> Hi Martin,
>
> itk::MeshFileReader and itk::MeshFileWriter are great classes for
> importing / exporting meshes.
>
> HTH,
> Matt
>
> On Mon, Sep 22, 2014 at 3:49 PM, Martin Genet <genet at biomed.ee.ethz.ch> wrote:
>> Dear all:
>>
>> Trying to use FEMRegistration on a bunch of images. Still trying to figure
>> out the following:
>>
>>   - What is the simplest way to convert an external mesh (e.g.,
>> vtkUnstructuredGrid, or GMSH) into an FEMObject (for registration), and vice
>> versa (for post-treatment, vizualization)?
>>
>>   - If the mesh covers only a subset of the image, what happens to the rest
>> of the image?
>>
>> Any help would be super appreciated. Sorry if that's too trivial. Thanks in
>> advance.
>>
>> Martin
>>
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