itkDirectFourierReconstructionImageToImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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
 *
 *         http://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 itkDirectFourierReconstructionImageToImageFilter_h
#define itkDirectFourierReconstructionImageToImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImage.h"

#include "itkVnlForwardFFTImageFilter.h"
#include "itkVnlInverseFFTImageFilter.h"

#include "itkImageRegionIteratorWithIndex.h"
#include "itkImageSliceConstIteratorWithIndex.h"

#include "itkComplexBSplineInterpolateImageFunction.h"

#include <cmath>

namespace itk
{
template< typename TInputImage, typename TOutputImage=TInputImage >
class ITK_TEMPLATE_EXPORT DirectFourierReconstructionImageToImageFilter:
  public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(DirectFourierReconstructionImageToImageFilter);

  using Self = DirectFourierReconstructionImageToImageFilter;

  using InputImageType = TInputImage;
  using InputPixelType = typename InputImageType::PixelType;
  using OutputImageType = TOutputImage;
  using OutputPixelType = typename OutputImageType::PixelType;

  using Superclass = ImageToImageFilter< InputImageType, OutputImageType >;

  using Pointer = SmartPointer< Self >;

  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);
  itkTypeMacro(DirectFourierReconstructionImageToImageFilter, ImageToImageFilter);

  using RegionType = typename InputImageType::RegionType;

  using IndexType = typename InputImageType::IndexType;

  using SizeType = typename InputImageType::SizeType;

  using PointType = typename InputImageType::PointType;

  using SpacingType = typename InputImageType::SpacingType;

  using ConstInputImagePointer = typename InputImageType::ConstPointer;

  using InputImagePointer = typename InputImageType::Pointer;

  using OutputImagePointer = typename OutputImageType::Pointer;

  itkSetMacro(ZeroPadding, unsigned short int);
  itkGetConstMacro(ZeroPadding, unsigned short int);

  itkSetMacro(OverSampling, unsigned short int);
  itkGetConstMacro(OverSampling, unsigned short int);

  itkSetMacro(Cutoff, double);
  itkGetConstMacro(Cutoff, double);

  itkSetMacro(AlphaRange, double);
  itkGetConstMacro(AlphaRange, double);

  itkSetMacro(AlphaDirection, unsigned short int);
  itkGetConstMacro(AlphaDirection, unsigned short int);

  itkSetMacro(ZDirection, unsigned short int);
  itkGetConstMacro(ZDirection, unsigned short int);

  itkSetMacro(RDirection, unsigned short int);
  itkGetConstMacro(RDirection, unsigned short int);

  itkSetMacro(RadialSplineOrder, unsigned short int);
  itkGetConstMacro(RadialSplineOrder, unsigned short int);

protected:
  DirectFourierReconstructionImageToImageFilter();

  ~DirectFourierReconstructionImageToImageFilter() override {}

  void PrintSelf(std::ostream & os, Indent indent) const override;

  void GenerateOutputInformation() override;

  void GenerateInputRequestedRegion() override;

  void GenerateData() override;

private:
  using InputSliceIteratorType = ImageSliceConstIteratorWithIndex< InputImageType >;

  using LineImageType = Image< double, 1 >;
  using FFTLineFilterType = VnlForwardFFTImageFilter< LineImageType >;

  using FFTLineType = FFTLineFilterType::OutputImageType;

  using ProjectionLineType = FFTLineFilterType::InputImageType;

  using FFTLineIteratorType = ImageRegionIteratorWithIndex< FFTLineType >;

  using FFTLineInterpolatorType = ComplexBSplineInterpolateImageFunction< FFTLineType, double, double >;

  using IFFTImageType = Image< std::complex<double>, 2>;
  using IFFTSliceFilterType = VnlInverseFFTImageFilter< IFFTImageType >;

  using FFTSliceType = IFFTSliceFilterType::InputImageType;

  using OutputSliceType = IFFTSliceFilterType::OutputImageType;

  using FFTSliceIteratorType = ImageRegionIteratorWithIndex< FFTSliceType >;

  using OutputSliceIteratorType = ImageRegionIteratorWithIndex< OutputSliceType >;

};
} // namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkDirectFourierReconstructionImageToImageFilter.hxx"
#endif

#endif /* itkDirectFourierReconstructionImageToImageFilter_h */