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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 itkComplexToComplexFFTImageFilter_h
#define itkComplexToComplexFFTImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkMacro.h"
#include "ITKFFTExport.h"
#include <complex>
namespace itk
{
/** \class ComplexToComplexFFTImageFilterEnums
* \brief Contains enum classes used by ComplexToComplexFFTImageFilter class
* \ingroup ITKFFT
* \ingroup FourierTransform
*/
class ComplexToComplexFFTImageFilterEnums
{
public:
/**
* \class TransformDirection
* \ingroup ITKFFT
* \ingroup FourierTransform
* */
enum class TransformDirection : uint8_t
{
FORWARD = 1,
INVERSE = 2
};
};
// Define how to print enumeration
extern ITKFFT_EXPORT std::ostream &
operator<<(std::ostream & out, const ComplexToComplexFFTImageFilterEnums::TransformDirection value);
/**
* \class ComplexToComplexFFTImageFilter
*
* \brief Implements an API to enable the Fourier transform or the inverse
* Fourier transform of images with complex valued voxels to be computed.
*
* \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
*
* \ingroup FourierTransform
* \ingroup ITKFFT
*
* \sa ForwardFFTImageFilter
*/
template <typename TInputImage, typename TOutputImage = TInputImage>
class ITK_TEMPLATE_EXPORT ComplexToComplexFFTImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ComplexToComplexFFTImageFilter);
/** Input and output image types. */
using ImageType = TInputImage;
using InputImageType = TInputImage;
using OutputImageType = TOutputImage;
/** Standard class type aliases. */
using Self = ComplexToComplexFFTImageFilter;
using Superclass = ImageToImageFilter<InputImageType, OutputImageType>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
static constexpr unsigned int ImageDimension = InputImageType::ImageDimension;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(ComplexToComplexFFTImageFilter);
/** Customized object creation methods that support configuration-based
* selection of FFT implementation.
*
* Default implementation is VnlFFT.
*/
itkFactoryOnlyNewMacro(Self);
using TransformDirectionEnum = ComplexToComplexFFTImageFilterEnums::TransformDirection;
#if !defined(ITK_LEGACY_REMOVE)
/**Exposes enums values for backwards compatibility*/
static constexpr TransformDirectionEnum FORWARD = TransformDirectionEnum::FORWARD;
static constexpr TransformDirectionEnum INVERSE = TransformDirectionEnum::INVERSE;
#endif
/** Image type alias support */
using ImageSizeType = typename ImageType::SizeType;
/** Set/Get the direction in which the transform will be applied.
* By selecting FORWARD, this filter will perform a direct, i.e. forward, Fourier Transform,
* By selecting INVERSE, this filter will perform an inverse, i.e. backward, Fourier Transform,
*/
itkSetEnumMacro(TransformDirection, TransformDirectionEnum);
itkGetConstMacro(TransformDirection, TransformDirectionEnum);
protected:
ComplexToComplexFFTImageFilter() = default;
void
GenerateInputRequestedRegion() override;
private:
TransformDirectionEnum m_TransformDirection{ TransformDirectionEnum::FORWARD };
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkComplexToComplexFFTImageFilter.hxx"
#endif
#ifdef ITK_FFTIMAGEFILTERINIT_FACTORY_REGISTER_MANAGER
# include "itkFFTImageFilterInitFactoryRegisterManager.h"
#endif
#endif
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