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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#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.
*
* \ingroup ITKImageIntensity
*/
namespace Functor
{
template< typename TInput, typename 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) const
{
return static_cast< TOutput >( 1.0 / ( 1.0 + static_cast< double >( A ) ) );
}
};
}
template< typename TInputImage, typename TOutputImage >
class 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() ITK_OVERRIDE {}
private:
ITK_DISALLOW_COPY_AND_ASSIGN(BoundedReciprocalImageFilter);
};
} // end namespace itk
#endif
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