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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
#ifndef itkAbsImageFilter_h
#define itkAbsImageFilter_h
#include "itkUnaryGeneratorImageFilter.h"
#include "itkConceptChecking.h"
namespace itk
{
namespace Functor
{
/** \class Abs
* \brief Computes the absolute value of a pixel.
* \ingroup ITKImageIntensity
*/
template <typename TInput, typename TOutput>
class Abs
{
public:
bool
operator==(const Abs &) const
{
return true;
}
ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(Abs);
inline TOutput
operator()(const TInput & A) const
{
return static_cast<TOutput>(itk::Math::abs(A));
}
};
} // namespace Functor
/** \class AbsImageFilter
* \brief Computes the absolute value of each pixel.
*
* itk::Math::abs() is used to perform the computation.
*
* \ingroup IntensityImageFilters
* \ingroup MultiThreaded
* \ingroup ITKImageIntensity
*
* \sphinx
* \sphinxexample{Filtering/ImageIntensity/AbsValueOfImage,Absolute Value Of Image}
* \endsphinx
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT AbsImageFilter : public UnaryGeneratorImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(AbsImageFilter);
/** Standard class type aliases. */
using Self = AbsImageFilter;
using Superclass = UnaryGeneratorImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using FunctorType = Functor::Abs<typename TInputImage::PixelType, typename TOutputImage::PixelType>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(AbsImageFilter);
using InputPixelType = typename TInputImage::PixelType;
using OutputPixelType = typename TOutputImage::PixelType;
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(ConvertibleCheck, (Concept::Convertible<InputPixelType, OutputPixelType>));
itkConceptMacro(InputGreaterThanIntCheck, (Concept::GreaterThanComparable<InputPixelType, InputPixelType>));
// End concept checking
#endif
protected:
AbsImageFilter()
{
#if !defined(ITK_WRAPPING_PARSER)
Superclass::SetFunctor(FunctorType());
#endif
}
~AbsImageFilter() override = default;
};
} // end namespace itk
#endif
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