[Insight-users] ITK to VTK: MHD Vector Fields

[Karthik Krishnan]

There was a bug in Code/IO/itkVTKImageIO.cxx, fixed a couple of weeks 
prior to ITK-2-2 release. Please check the cvs dates of your file:

Here is the CVS log:
http://www.itk.org/cgi-bin/viewcvs.cgi/Code/IO/itkVTKImageIO.cxx?rev=1.34&root=Insight&view=log

-karthik

Hari Sundar wrote:

>Hi,
>
>I know this problem has been discussed earlier ... but the answers were
>not helpful, and I am still having trouble.
>
>I have a vector field, 3D float image with 3 components at each voxel.
>I need to get it into VTK so that I can visualize this using glyphs.
>
>This is what I do ...
>
>const unsigned int ImageDimension = 3;
>  typedef float PixelType;
>
>  typedef itk::Image <PixelType, ImageDimension> ImageType; 
>  typedef itk::Vector < float, ImageDimension > VectorType;
>  typedef itk::Image <VectorType, ImageDimension >
>DeformationFieldType;
>  typedef itk::ImageFileReader < DeformationFieldType >
>FieldReaderType;
>  typedef itk::ImageToVTKImageFilter <DeformationFieldType >
>ITK2VTKAdaptorFilterType;
>  
>
>  FieldReaderType::Pointer fieldReader = FieldReaderType::New (); 
>
>  if (argc >= 1) {
>	  fieldReader->SetFileName (argv[1]);
>      try {
>		  fieldReader->Update ();
>      } catch (itk::ExceptionObject & excp) {
>		  std::cerr << "Exception thrown " << std::endl;
>		  std::cerr << excp << std::endl;
>		  return EXIT_FAILURE;
>      }
>  }
>
>  std::cout << "Finished reading file" << std::endl;
>  ITK2VTKAdaptorFilterType *m_ITK2VTKAdaptor  =
>ITK2VTKAdaptorFilterType::New();
>  m_ITK2VTKAdaptor->SetInput( fieldReader->GetOutput() );
>  m_ITK2VTKAdaptor->Update();
>  
>  std::cout << "Finished converting to VTK" << std::endl;
>... Rest follows ...
>
>I get a segmentation fault within ITK2VTKAdaptorFilterType::Update().
>
>The mhd file I am testing with is correct, since I am able to load it
>within paraview and visualize it.
>
>what am I doing wrong here ?
>
>thanks,
>~Hari
>
>bhogaa na bhuktaa vayameva bhuktaaH
>tapo na tapta.n vayameva taptaaH |
>kaalo na yaato vayameva yaataaH
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>
>
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