ITK/Examples/Broken/ImageProcessing/GradientOfVectorImage

Can't instantiate a GradientImageFilter with a vector image type?

The compiler errors are: /home/doriad/src/ITK/Code/Common/itkConceptChecking.h: In member function ‘void itk::Concept::Convertible<T1, T2>::Constraints::constraints() [with T1 = itk::CovariantVector<float, 2u>, T2 = float]’: /home/doriad/src/ITK/Code/Common/itkConceptChecking.h:192: instantiated from ‘itk::Concept::Convertible<itk::CovariantVector<float, 2u>, float>’ /home/doriad/src/ITK/Code/BasicFilters/itkGradientImageFilter.h:119: instantiated from ‘itk::GradientImageFilter<itk::Image<itk::CovariantVector<float, 2u>, 2u>, itk::CovariantVector<float, 2u>, float>’ /media/portable/Examples/c++/src/ITK/GradientOfVectorImage/GradientOfVectorImage.cxx:37: instantiated from here /home/doriad/src/ITK/Code/Common/itkConceptChecking.h:185: error: invalid static_cast from type ‘itk::CovariantVector<float, 2u>’ to type ‘float’

GradientOfVectorImage.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkCovariantVector.h"
3. include "itkGradientImageFilter.h"
4. include "itkImageRegionIterator.h"

int main(int argc, char * argv[]) {

 // Setup types
 typedef itk::CovariantVector<float, 2> VectorType;
 typedef itk::Image<VectorType, 2>   VectorImageType;
 VectorImageType::Pointer image = VectorImageType::New();

 itk::Size<2> size;
 size[0] = 5;
 size[1] = 5;

 itk::Index<2> index;
 index[0] = 0;
 index[1] = 0;

 VectorImageType::RegionType region;
 region.SetSize(size);
 region.SetIndex(index);

 image->SetRegions(region);
 image->Allocate();

 itk::ImageRegionIterator<VectorImageType> iterator(image, region);

 while(!iterator.IsAtEnd())
   {
   }
   
 // Create and setup a gradient filter
 typedef itk::GradientImageFilter<
     VectorImageType, VectorType>  GradientFilterType;
 GradientFilterType::Pointer gradientFilter = GradientFilterType::New();
 gradientFilter->SetInput(image);
 gradientFilter->Update();

 return EXIT_SUCCESS;

}

</source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(GradientOfVectorImage)

FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})

ADD_EXECUTABLE(GradientOfVectorImage GradientOfVectorImage.cxx) TARGET_LINK_LIBRARIES(GradientOfVectorImage ITKBasicFilters ITKIO ITKCommon)

</source>