itkVnlRealToHalfHermitianForwardFFTImageFilter.h

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 *  Copyright NumFOCUS
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 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
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#ifndef itkVnlRealToHalfHermitianForwardFFTImageFilter_h
#define itkVnlRealToHalfHermitianForwardFFTImageFilter_h
 
#include "itkRealToHalfHermitianForwardFFTImageFilter.h"
 
#include "itkVnlFFTCommon.h"
#include "vnl/algo/vnl_fft_base.h"
 
#include "itkFFTImageFilterFactory.h"
 
namespace itk
{
template <typename TInputImage,
          typename TOutputImage = Image<std::complex<typename TInputImage::PixelType>, TInputImage::ImageDimension>>
class ITK_TEMPLATE_EXPORT VnlRealToHalfHermitianForwardFFTImageFilter
  : public RealToHalfHermitianForwardFFTImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(VnlRealToHalfHermitianForwardFFTImageFilter);
 
  using InputImageType = TInputImage;
  using InputPixelType = typename InputImageType::PixelType;
  using InputSizeType = typename InputImageType::SizeType;
  using InputSizeValueType = typename InputImageType::SizeValueType;
  using OutputImageType = TOutputImage;
  using OutputPixelType = typename OutputImageType::PixelType;
  using OutputSizeType = typename OutputImageType::SizeType;
 
  using Self = VnlRealToHalfHermitianForwardFFTImageFilter;
  using Superclass = RealToHalfHermitianForwardFFTImageFilter<TInputImage, TOutputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkNewMacro(Self);
 
  itkOverrideGetNameOfClassMacro(VnlRealToHalfHermitianForwardFFTImageFilter);
 
  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;
  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
 
  SizeValueType
  GetSizeGreatestPrimeFactor() const override;
 
#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro(ImageDimensionsMatchCheck, (Concept::SameDimension<InputImageDimension, OutputImageDimension>));
  // End concept checking
#endif
 
protected:
  VnlRealToHalfHermitianForwardFFTImageFilter() = default;
  ~VnlRealToHalfHermitianForwardFFTImageFilter() override = default;
 
  void
  GenerateData() override;
 
private:
  using SignalVectorType = vnl_vector<std::complex<InputPixelType>>;
};
 
 
// Describe whether input/output are real- or complex-valued
// for factory registration
template <>
struct FFTImageFilterTraits<VnlRealToHalfHermitianForwardFFTImageFilter>
{
  template <typename TUnderlying>
  using InputPixelType = TUnderlying;
  template <typename TUnderlying>
  using OutputPixelType = std::complex<TUnderlying>;
  using FilterDimensions = std::integer_sequence<unsigned int, 4, 3, 2, 1>;
};
 
} // namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkVnlRealToHalfHermitianForwardFFTImageFilter.hxx"
#endif
 
#endif