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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkBoundedReciprocalImageFilter.h,v $
Language: C++
Date: $Date: 2007-09-27 11:36:40 $
Version: $Revision: 1.6 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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 __itkBoundedReciprocalImageFilter_h
#define __itkBoundedReciprocalImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
/** \class BoundedReciprocalImageFilter
*
* \brief Computes 1/(1+x) for each pixel in the image
*
* The filter expect both the input and output images to have the same
* number of dimensions, and both of a scalar image type.
*
*/
namespace Functor {
template< class TInput, class TOutput>
class BoundedReciprocal
{
public:
BoundedReciprocal() {};
~BoundedReciprocal() {};
bool operator!=( const BoundedReciprocal & ) const
{
return false;
}
bool operator==( const BoundedReciprocal & other ) const
{
return !(*this != other);
}
inline TOutput operator()( const TInput & A )
{
return static_cast<TOutput>( 1.0 / ( 1.0 + static_cast<double>(A) ) );
}
};
}
template <class TInputImage, class TOutputImage>
class ITK_EXPORT BoundedReciprocalImageFilter :
public
UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::BoundedReciprocal<
typename TInputImage::PixelType,
typename TOutputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef BoundedReciprocalImageFilter Self;
typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::BoundedReciprocal<
typename TInputImage::PixelType,
typename TOutputImage::PixelType>
> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(BoundedReciprocalImageFilter,
UnaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputConvertibleToDoubleCheck,
(Concept::Convertible<typename TInputImage::PixelType, double>));
itkConceptMacro(DoubleConvertibleToOutputCheck,
(Concept::Convertible<double, typename TOutputImage::PixelType>));
/** End concept checking */
#endif
protected:
BoundedReciprocalImageFilter() {}
virtual ~BoundedReciprocalImageFilter() {}
private:
BoundedReciprocalImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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