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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 itkMagnitudeAndPhaseToComplexImageFilter_h
#define itkMagnitudeAndPhaseToComplexImageFilter_h
#include "itkBinaryGeneratorImageFilter.h"
namespace itk
{
/** \class MagnitudeAndPhaseToComplexImageFilter
*
* \brief Implements pixel-wise conversion of magnitude and phase data into
* complex voxels.
*
* This filter is parameterized over the types of the two
* input images and the type of the output image.
*
* The filter expect all images to have the same dimension
* (e.g. all 2D, or all 3D, or all ND)
*
* \ingroup IntensityImageFilters MultiThreaded
*
* \weakgroup FourierTransform
*
* \author Simon K. Warfield simon.warfield\@childrens.harvard.edu
*
* \note Attribution Notice. This research work was made possible by Grant
* Number R01 RR021885 (PI Simon K. Warfield, Ph.D.) from the National Center
* for Research Resources (NCRR), a component of the National Institutes of
* Health (NIH). Its contents are solely the responsibility of the authors
* and do not necessarily represent the official view of NCRR or NIH.
*
* This class was taken from the Insight Journal paper:
* https://www.insight-journal.org/browse/publication/128
*
* \sa ComposeImageFilter
*
* \ingroup ITKImageIntensity
*/
namespace Functor
{
template <typename TInput1, typename TInput2, typename TOutput>
class MagnitudeAndPhaseToComplex
{
public:
bool
operator==(const MagnitudeAndPhaseToComplex &) const
{
return true;
}
ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(MagnitudeAndPhaseToComplex);
inline std::complex<TOutput>
operator()(const TInput1 & A, const TInput2 & B) const
{
return std::complex<TOutput>(std::polar(static_cast<TOutput>(A), static_cast<TOutput>(B)));
}
};
} // namespace Functor
template <typename TInputImage1,
typename TInputImage2 = TInputImage1,
typename TOutputImage =
itk::Image<std::complex<typename TInputImage1::PixelType>, TInputImage1::ImageDimension>>
class MagnitudeAndPhaseToComplexImageFilter
: public BinaryGeneratorImageFilter<TInputImage1, TInputImage2, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(MagnitudeAndPhaseToComplexImageFilter);
/** Standard class type aliases. */
using Self = MagnitudeAndPhaseToComplexImageFilter;
using Superclass = BinaryGeneratorImageFilter<TInputImage1, TInputImage2, TOutputImage>;
using InputPixel1Type = typename TInputImage1::PixelType;
using InputPixel2Type = typename TInputImage2::PixelType;
using OutputPixelType = typename TOutputImage::PixelType;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using FunctorType = Functor::MagnitudeAndPhaseToComplex<typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType::value_type>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(MagnitudeAndPhaseToComplexImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(Input1ConvertibleToDoubleCheck, (Concept::Convertible<InputPixel1Type, double>));
itkConceptMacro(Input2ConvertibleToDoubleCheck, (Concept::Convertible<InputPixel2Type, double>));
itkConceptMacro(DoubleConvertibleToOutputCheck, (Concept::Convertible<double, OutputPixelType>));
// End concept checking
#endif
protected:
MagnitudeAndPhaseToComplexImageFilter()
{
#if !defined(ITK_WRAPPING_PARSER)
Superclass::SetFunctor(FunctorType());
#endif
}
~MagnitudeAndPhaseToComplexImageFilter() override = default;
};
} // end namespace itk
#endif
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