[Insight-users] Error while trying to read a vector image using VariableLengthVector

[ravikiranj]

Hi all,
    I have run into a problem while trying to write/read vector images and I
hope someone points me the right direction to solve my issue:-

I need to write a 3D image where each pixel has 'k' (varies) values. Hence I
created a dummy image of this by using VariableLengthVector and wrote the
image.

When I try to read the image back again, I get the below compile errors:-
(sorry for the verbose error)

In file included from
/home/ravikiran/ITK/Modules/IO/Base/include/itkImageFileReader.h:25:0,
                 from /home/ravikiran/vectorimg/VectorImage.cxx:11:
/home/ravikiran/ITK/Modules/IO/Base/include/itkDefaultConvertPixelTraits.h:
In static member function ‘static unsigned int
itk::DefaultConvertPixelTraits<PixelType>::GetNumberOfComponents() [with
PixelType = itk::VariableLengthVector<double>]’:
/home/ravikiran/ITK/Modules/IO/Base/include/itkImageFileReader.hxx:398:5:  
instantiated from ‘void itk::ImageFileReader<TOutputImage,
ConvertPixelTraits>::GenerateData() [with TOutputImage =
itk::Image<itk::VariableLengthVector<double>, 3u>, ConvertPixelTraits =
itk::DefaultConvertPixelTraits<itk::VariableLengthVector<double> >]’
/home/ravikiran/vectorimg/VectorImage.cxx:67:1:   instantiated from here
/home/ravikiran/ITK/Modules/IO/Base/include/itkDefaultConvertPixelTraits.h:47:45:
error: ‘GetNumberOfComponents’ is not a member of
‘itk::VariableLengthVector<double>’
/home/ravikiran/ITK/Modules/IO/Base/include/itkDefaultConvertPixelTraits.h:
In static member function ‘static void
itk::DefaultConvertPixelTraits<PixelType>::SetNthComponent(int, PixelType&,
const ComponentType&) [with PixelType = itk::VariableLengthVector<double>,
itk::DefaultConvertPixelTraits<PixelType>::ComponentType = double]’:
/home/ravikiran/ITK/Modules/IO/Base/include/itkConvertPixelBuffer.hxx:705:5:  
instantiated from ‘static void itk::ConvertPixelBuffer<InputPixelType,
OutputPixelType, OutputConvertTraits>::ConvertVectorImage(InputPixelType*,
int, OutputPixelType*, std::size_t) [with InputPixelType = unsigned char,
OutputPixelType = itk::VariableLengthVector<double>, OutputConvertTraits =
itk::DefaultConvertPixelTraits<itk::VariableLengthVector<double> >,
std::size_t = long unsigned int]’
/home/ravikiran/ITK/Modules/IO/Base/include/itkImageFileReader.hxx:528:3:  
instantiated from ‘void itk::ImageFileReader<TOutputImage,
ConvertPixelTraits>::DoConvertBuffer(void*, std::size_t) [with TOutputImage
= itk::Image<itk::VariableLengthVector<double>, 3u>, ConvertPixelTraits =
itk::DefaultConvertPixelTraits<itk::VariableLengthVector<double> >,
std::size_t = long unsigned int]’
/home/ravikiran/ITK/Modules/IO/Base/include/itkImageFileReader.hxx:418:7:  
instantiated from ‘void itk::ImageFileReader<TOutputImage,
ConvertPixelTraits>::GenerateData() [with TOutputImage =
itk::Image<itk::VariableLengthVector<double>, 3u>, ConvertPixelTraits =
itk::DefaultConvertPixelTraits<itk::VariableLengthVector<double> >]’
/home/ravikiran/vectorimg/VectorImage.cxx:67:1:   instantiated from here
/home/ravikiran/ITK/Modules/IO/Base/include/itkDefaultConvertPixelTraits.h:55:5:
error: ‘class itk::VariableLengthVector<double>’ has no member named
‘SetNthComponent’
make[2]: *** [CMakeFiles/VectorImage.dir/VectorImage.cxx.o] Error 1
make[1]: *** [CMakeFiles/VectorImage.dir/all] Error 2
make: *** [all] Error 2

I have attached the .cxx and the CMakeLists.txt file. Is there something
wrong I'm doing in the code ? I cannot use VectorImage as I don't know the
no. of components I need to store per pixel at compile time.

Please let me know if anything is unclear.
http://old.nabble.com/file/p32858761/VectorImage.cxx VectorImage.cxx 
http://old.nabble.com/file/p32858761/CMakeLists.txt CMakeLists.txt 
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