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/*=========================================================================
Program: Advanced Normalization Tools
Copyright (c) ConsortiumOfANTS. All rights reserved.
See accompanying COPYING.txt or
https://github.com/stnava/ANTs/blob/master/ANTSCopyright.txt 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 __itkAddConstantToImageFilter_h
#define __itkAddConstantToImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
#include "itkNumericTraits.h"
namespace itk
{
/** \class AddConstantToImageFilter
*
* \brief Add a constant to all input pixels.
*
* This filter is templated over the input image type
* and the output image type.
*
* \author Tom Vercauteren, INRIA & Mauna Kea Technologies
*
* Based on filters from the Insight Journal paper:
* http://hdl.handle.net/1926/510
*
* \ingroup IntensityImageFilters Multithreaded
* \sa UnaryFunctorImageFilter
*/
namespace Functor
{
template <typename TInput, typename TConstant, typename TOutput>
class AddConstantTo
{
public:
AddConstantTo()
: m_Constant(NumericTraits<TConstant>::OneValue()){};
~AddConstantTo() = default;
bool
operator!=(const AddConstantTo & other) const
{
return !(*this == other);
}
bool
operator==(const AddConstantTo & other) const
{
return other.m_Constant == m_Constant;
}
inline TOutput
operator()(const TInput & A) const
{
// Because the user has to specify the constant we don't
// check if the cte is not 0;
return static_cast<TOutput>(A + m_Constant);
}
void
SetConstant(TConstant ct)
{
this->m_Constant = ct;
}
const TConstant &
GetConstant() const
{
return m_Constant;
}
TConstant m_Constant;
};
} // namespace Functor
template <typename TInputImage, typename TConstant, typename TOutputImage>
class AddConstantToImageFilter
: public UnaryFunctorImageFilter<
TInputImage,
TOutputImage,
Functor::AddConstantTo<typename TInputImage::PixelType, TConstant, typename TOutputImage::PixelType>>
{
public:
/** Standard class typedefs. */
typedef AddConstantToImageFilter Self;
typedef UnaryFunctorImageFilter<
TInputImage,
TOutputImage,
Functor::AddConstantTo<typename TInputImage::PixelType, TConstant, typename TOutputImage::PixelType>>
Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(AddConstantToImageFilter, UnaryFunctorImageFilter);
/** Set the constant that will be used to multiply all the image
* pixels */
void
SetConstant(TConstant ct)
{
if (ct != this->GetFunctor().GetConstant())
{
this->GetFunctor().SetConstant(ct);
this->Modified();
}
}
const TConstant &
GetConstant() const
{
return this->GetFunctor().GetConstant();
}
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputConvertibleToOutputCheck,
(Concept::Convertible<typename TInputImage::PixelType, typename TOutputImage::PixelType>));
itkConceptMacro(
Input1Input2OutputAddOperatorCheck,
(Concept::AdditiveOperators<typename TInputImage::PixelType, TConstant, typename TOutputImage::PixelType>));
/** End concept checking */
#endif
protected:
AddConstantToImageFilter() = default;
virtual ~AddConstantToImageFilter() = default;
void
PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Constant: " << static_cast<typename NumericTraits<TConstant>::PrintType>(this->GetConstant())
<< std::endl;
}
private:
AddConstantToImageFilter(const Self &) = delete;
void
operator=(const Self &) = delete;
};
} // end namespace itk
#endif
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