rtkZengBackProjectionImageFilter.h

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/*=========================================================================
 *
 *  Copyright RTK 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
 *
 *         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 rtkZengBackProjectionImageFilter_h
#define rtkZengBackProjectionImageFilter_h

#include "rtkConfiguration.h"
#include "rtkBackProjectionImageFilter.h"
#include "rtkMacro.h"
#include <itkPixelTraits.h>

#include <itkMultiplyImageFilter.h>
#include <itkAddImageFilter.h>
#include <itkDiscreteGaussianImageFilter.h>
#include <itkPasteImageFilter.h>
#include <itkResampleImageFilter.h>
#include <itkVector.h>
#include <itkCenteredEuler3DTransform.h>
#include <itkChangeInformationImageFilter.h>
#include <itkExtractImageFilter.h>
#include <itkRegionOfInterestImageFilter.h>
#include <itkConstantBoundaryCondition.h>
#include <itkUnaryGeneratorImageFilter.h>

#include "rtkConstantImageSource.h"

#include <itkVectorImage.h>
namespace rtk
{

template <class TInputImage, class TOutputImage>
class ITK_TEMPLATE_EXPORT ZengBackProjectionImageFilter : public BackProjectionImageFilter<TInputImage, TOutputImage>
{
public:
  using VectorType = itk::Vector<double, 3>;
  using InputPixelType = typename TInputImage::PixelType;
  using OutputPixelType = typename TOutputImage::PixelType;
  using OutputImageRegionType = typename TOutputImage::RegionType;
  using InputCPUImageType = itk::Image<InputPixelType, 3>;
  using OuputCPUImageType = itk::Image<OutputPixelType, 3>;
  using PointType = typename OuputCPUImageType::PointType;

  using Self = ZengBackProjectionImageFilter;
  using Superclass = BackProjectionImageFilter<TInputImage, TOutputImage>;
  using Pointer = itk::SmartPointer<Self>;
  using ConstPointer = itk::SmartPointer<const Self>;
  using AddImageFilterType = itk::AddImageFilter<InputCPUImageType, InputCPUImageType>;
  using AddImageFilterPointerType = typename AddImageFilterType::Pointer;
  using PasteImageFilterType = itk::PasteImageFilter<InputCPUImageType, OuputCPUImageType>;
  using PasteImageFilterPointerType = typename PasteImageFilterType::Pointer;
  using DiscreteGaussianFilterType = itk::DiscreteGaussianImageFilter<OuputCPUImageType, OuputCPUImageType>;
  using DiscreteGaussianFilterPointeurType = typename DiscreteGaussianFilterType::Pointer;
  using ResampleImageFilterType = itk::ResampleImageFilter<InputCPUImageType, InputCPUImageType>;
  using ResampleImageFilterPointerType = typename ResampleImageFilterType::Pointer;
  using TransformType = itk::CenteredEuler3DTransform<double>;
  using TransformPointerType = typename TransformType::Pointer;
  using ChangeInformationFilterType = itk::ChangeInformationImageFilter<OuputCPUImageType>;
  using ChangeInformationPointerType = typename ChangeInformationFilterType::Pointer;
  using MultiplyImageFilterType = itk::MultiplyImageFilter<InputCPUImageType, InputCPUImageType>;
  using MultpiplyImageFilterPointerType = typename MultiplyImageFilterType::Pointer;
  using ConstantVolumeSourceType = rtk::ConstantImageSource<InputCPUImageType>;
  using ConstantVolumeSourcePointerType = typename ConstantVolumeSourceType::Pointer;
  using ExtractImageFilterType = itk::ExtractImageFilter<OuputCPUImageType, OuputCPUImageType>;
  using ExtractImageFilterPointerType = typename ExtractImageFilterType::Pointer;
  using RegionOfInterestFilterType = itk::RegionOfInterestImageFilter<OuputCPUImageType, OuputCPUImageType>;
  using RegionOfInterestPointerType = typename RegionOfInterestFilterType::Pointer;
  using CustomUnaryFilterType = itk::UnaryGeneratorImageFilter<OuputCPUImageType, OuputCPUImageType>;
  using CustomUnaryFilterPointerType = typename CustomUnaryFilterType::Pointer;

  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;

  using BoundaryCondition = itk::ConstantBoundaryCondition<OuputCPUImageType>;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(ZengBackProjectionImageFilter);

  itkGetMacro(SigmaZero, double);
  itkSetMacro(SigmaZero, double);

  itkGetMacro(Alpha, double);
  itkSetMacro(Alpha, double);


protected:
  ZengBackProjectionImageFilter();
  ~ZengBackProjectionImageFilter() override = default;

  void
  GenerateInputRequestedRegion() override;

  void
  GenerateOutputInformation() override;

  void
  GenerateData() override;

  void
  VerifyInputInformation() const override;

  AddImageFilterPointerType          m_AddImageFilter;
  PasteImageFilterPointerType        m_PasteImageFilter;
  DiscreteGaussianFilterPointeurType m_DiscreteGaussianFilter;
  ResampleImageFilterPointerType     m_ResampleImageFilter;
  TransformPointerType               m_Transform;
  MultpiplyImageFilterPointerType    m_MultiplyImageFilter;
  ConstantVolumeSourcePointerType    m_ConstantVolumeSource;
  ExtractImageFilterPointerType      m_ExtractImageFilter;
  ChangeInformationPointerType       m_ChangeInformation;
  MultpiplyImageFilterPointerType    m_AttenuationMapMultiplyImageFilter;
  RegionOfInterestPointerType        m_AttenuationMapRegionOfInterest;
  ResampleImageFilterPointerType     m_AttenuationMapResampleImageFilter;
  ChangeInformationPointerType       m_AttenuationMapChangeInformation;
  TransformPointerType               m_AttenuationMapTransform;
  BoundaryCondition                  m_BoundsCondition;
  CustomUnaryFilterPointerType       m_CustomUnaryFilter;

private:
  ZengBackProjectionImageFilter(const Self &) = delete; // purposely not implemented
  void
  operator=(const Self &) = delete; // purposely not implemented

  double     m_SigmaZero{ 1.5417233052142099 };
  double     m_Alpha{ 0.016241189545787734 };
  VectorType m_VectorOrthogonalDetector{ 0. };
  PointType  m_centerVolume{ 0 };
};

} // end namespace rtk

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

#endif