rtkSubSelectImageFilter.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 rtkSubSelectImageFilter_h
#define rtkSubSelectImageFilter_h

#include <itkPasteImageFilter.h>
#include <itkExtractImageFilter.h>
#include "rtkConstantImageSource.h"
#include "rtkThreeDCircularProjectionGeometry.h"

namespace rtk
{

template <typename ProjectionStackType>
class ITK_TEMPLATE_EXPORT SubSelectImageFilter
  : public itk::ImageToImageFilter<ProjectionStackType, ProjectionStackType>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(SubSelectImageFilter);

  using Self = SubSelectImageFilter;
  using Superclass = itk::ImageToImageFilter<ProjectionStackType, ProjectionStackType>;
  using Pointer = itk::SmartPointer<Self>;

  itkTypeMacro(SubSelectImageFilter, itk::ImageToImageFilter);

  void
  SetInputProjectionStack(const ProjectionStackType * Projections);
  typename ProjectionStackType::ConstPointer
  GetInputProjectionStack();

  using PasteFilterType = itk::PasteImageFilter<ProjectionStackType>;
  using ExtractFilterType = itk::ExtractImageFilter<ProjectionStackType, ProjectionStackType>;
  using EmptyProjectionStackSourceType = rtk::ConstantImageSource<ProjectionStackType>;
  using GeometryType = rtk::ThreeDCircularProjectionGeometry;

  itkSetObjectMacro(InputGeometry, GeometryType);
  itkGetModifiableObjectMacro(InputGeometry, GeometryType);

  itkGetMacro(SelectedProjections, std::vector<bool>);

  GeometryType::Pointer
  GetOutputGeometry();

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

  void
  VerifyPreconditions() ITKv5_CONST override;

  void
  GenerateInputRequestedRegion() override;

  void
  GenerateOutputInformation() override;

  void
  GenerateData() override;

  GeometryType::Pointer m_InputGeometry;
  GeometryType::Pointer m_OutputGeometry;
  std::vector<bool>     m_SelectedProjections;
  int                   m_NbSelectedProjs;

private:
  typename EmptyProjectionStackSourceType::Pointer m_EmptyProjectionStackSource;
  typename ExtractFilterType::Pointer              m_ExtractFilter;
  typename PasteFilterType::Pointer                m_PasteFilter;
};
} // namespace rtk


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

#endif