[Insight-users] Problems taking a vtk dataset into itk

[John David Fleig]

We updated our copy of itk through cvs here and I tried the following 
code:

  typedef itk::Image<unsigned char,2> CharType;

  vtkTIFFReader* imageReader = vtkTIFFReader::New();
  imageReader->SetFileName("Wrath.tif"); 
  imageReader->Update();
    
  imageReader->Print(cerr);

  cerr << "About to run itk::VTKImageToImageFilter" << endl;
  typedef itk::VTKImageToImageFilter<CharType> ImporterToITK;
  ImporterToITK::Pointer movingItkImporter = ImporterToITK::New();
  movingItkImporter->SetInput(imageReader->GetOutput());
  movingItkImporter->Update();

  cerr << "printing pipe in middle" << endl;
  movingItkImporter->GetOutput()->Print(cerr);

  cerr << "About to run itk::ImageToVTKImageFilter" << endl;
  typedef itk::ImageToVTKImageFilter<CharType> ImporterToVTK;
  ImporterToVTK::Pointer vtkimporter = ImporterToVTK::New();
  vtkimporter->SetInput( movingItkImporter->GetOutput() );
  vtkimporter->Update();

  cerr << "About to run vtkImageCast" << endl;
  vtkImageCast *caster = vtkImageCast::New();
  caster->SetInput( vtkimporter->GetOutput() );
  caster->SetOutputScalarTypeToUnsignedChar();
  cerr << "update" << endl;
  caster->Update();
  
  cerr << "writing image" << endl;
  vtkTIFFWriter* imageWriter = vtkTIFFWriter::New();
  imageWriter->SetInput(caster->GetOutput());
  imageWriter->SetFileName("Wrath_copy.tif");
  imageWriter->Write();

What I get out is a dump of imageReader which looks fine.
the dump of the movingItkImporter still looks a little funny to me, but 
the big thing is that it will print me "update" message, but it will not 
get to the "writing image" part.

I still might be missing something easy and fundamental about how these 
things work with each other, but I don't know.

David





On Tue, 14 Jan 2003, Luis Ibanez wrote:

> Hi John,
> 
> Please use the class
> 
>       itkVTKImageToImageFilter
> 
> available in
> 
>       Insight/Auxiliary/vtk
> 
> This class encapsulates the vtkExporter
> and itkImporter that will move image
> data from VTK to ITK and viceversa.
>