[Insight-users] Concept checking warnings when using BinaryThinningImageFilter with unsigned int image

[David Doria]

With this code:

typedef itk::Image<unsigned int, 2>  ImageType;

int main(int, char *[])
{
  ImageType::Pointer image = ImageType::New();

  typedef itk::BinaryThinningImageFilter <ImageType, ImageType>
          BinaryThinningImageFilterType;
  BinaryThinningImageFilterType::Pointer filter
          = BinaryThinningImageFilterType::New();
  filter->SetInput(image);
  filter->Update();
}

I get 6 signed/unsigned comparison concept check warnings:

/home/doriad/src/ITK/Modules/Core/Common/include/itkConceptChecking.h: In
member function ‘void itk::Concept::Comparable<T1,
T2>::Constraints::constraints() [with T1 = unsigned int, T2 = int]’:
/home/doriad/src/ITK/Modules/Core/Common/include/itkConceptChecking.h:289:
instantiated from ‘itk::Concept::Comparable<unsigned int, int>’
/home/doriad/src/ITK/Modules/Filtering/MathematicalMorphology/include/itkBinaryThinningImageFilter.h:123:
  instantiated from ‘itk::BinaryThinningImageFilter<itk::Image<unsigned int,
2u>, itk::Image<unsigned int, 2u> >’
/media/portable/Examples/c++/src/ITK/BinaryThinningImageFilter/BinaryThinningImageFilter.cxx:17:
  instantiated from here
/home/doriad/src/ITK/Modules/Core/Common/include/itkConceptChecking.h:277:
warning: comparison between signed and unsigned integer expressions
/home/doriad/src/ITK/Modules/Core/Common/include/itkConceptChecking.h:289:
instantiated from ‘itk::Concept::Comparable<unsigned int, int>’

Is there a reason that BinaryThinningImageFilter can't be used with an
unsigned int image?

Thanks,

David
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