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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkTensorRelativeAnisotropyImageFilter.h,v $
Language: C++
Date: $Date: 2007-10-27 19:51:42 $
Version: $Revision: 1.5 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkTensorRelativeAnisotropyImageFilter_h
#define __itkTensorRelativeAnisotropyImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
// This functor class invokes the computation of relative anisotropy from
// every pixel.
namespace Functor {
template< typename TInput >
class TensorRelativeAnisotropyFunction
{
public:
typedef typename TInput::RealValueType RealValueType;
TensorRelativeAnisotropyFunction() {}
~TensorRelativeAnisotropyFunction() {}
bool operator!=( const TensorRelativeAnisotropyFunction & ) const
{
return false;
}
bool operator==( const TensorRelativeAnisotropyFunction & other ) const
{
return !(*this != other);
}
inline RealValueType operator()( const TInput & x )
{
return x.GetRelativeAnisotropy();
}
};
} // end namespace functor
/** \class TensorRelativeAnisotropyImageFilter
* \brief Computes the Relative Anisotropy for every pixel of a input tensor image.
*
* TensorRelativeAnisotropyImageFilter applies pixel-wise the invokation for
* computing the relative anisotropy of every pixel. The pixel type of the
* input image is expected to implement a method GetRelativeAnisotropy(), and
* to specify its return type as RealValueType.
*
* \sa TensorFractionalAnisotropyImageFilter
* \sa DiffusionTensor3D
*
* \ingroup IntensityImageFilters Multithreaded TensorObjects
*
*/
template <typename TInputImage, typename TOutputImage=TInputImage>
class ITK_EXPORT TensorRelativeAnisotropyImageFilter :
public
UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::TensorRelativeAnisotropyFunction<
typename TInputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef TensorRelativeAnisotropyImageFilter Self;
typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::TensorRelativeAnisotropyFunction<
typename TInputImage::PixelType> > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
typedef typename Superclass::OutputImageType OutputImageType;
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename InputPixelType::ValueType InputValueType;
/** Run-time type information (and related methods). */
itkTypeMacro( TensorRelativeAnisotropyImageFilter, UnaryFunctorImageFilter );
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Print internal ivars */
void PrintSelf(std::ostream& os, Indent indent) const
{ this->Superclass::PrintSelf( os, indent ); }
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputHasNumericTraitsCheck,
(Concept::HasNumericTraits<InputValueType>));
/** End concept checking */
#endif
protected:
TensorRelativeAnisotropyImageFilter() {};
virtual ~TensorRelativeAnisotropyImageFilter() {};
private:
TensorRelativeAnisotropyImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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