rtkSingularValueThresholdImageFilter.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 rtkSingularValueThresholdImageFilter_h
#define rtkSingularValueThresholdImageFilter_h

#include <itkInPlaceImageFilter.h>
#include <itkVector.h>

#include <itkImageRegionSplitterDirection.h>

namespace rtk
{
template <typename TInputImage, typename TRealType = float, typename TOutputImage = TInputImage>
class ITK_TEMPLATE_EXPORT SingularValueThresholdImageFilter : public itk::InPlaceImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(SingularValueThresholdImageFilter);

  using Self = SingularValueThresholdImageFilter;
  using Superclass = itk::ImageToImageFilter<TInputImage, TOutputImage>;
  using Pointer = itk::SmartPointer<Self>;
  using ConstPointer = itk::SmartPointer<const Self>;

  itkNewMacro(Self);

#ifdef itkOverrideGetNameOfClassMacro
  itkOverrideGetNameOfClassMacro(SingularValueThresholdImageFilter);
#else
  itkTypeMacro(SingularValueThresholdImageFilter, ImageToImageFilter);
#endif


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

  using InputImageType = TInputImage;
  using OutputImageType = TOutputImage;
  using InputImagePointer = typename InputImageType::Pointer;
  using OutputImagePointer = typename OutputImageType::Pointer;

  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;

  static constexpr unsigned int VectorDimension = InputPixelType::Dimension;

  using RealType = TRealType;
  using RealVectorType = itk::Vector<TRealType, InputPixelType::Dimension>;
  using RealVectorImageType = itk::Image<RealVectorType, TInputImage::ImageDimension>;

  using OutputImageRegionType = typename Superclass::OutputImageRegionType;

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputHasNumericTraitsCheck, (itk::Concept::HasNumericTraits<typename InputPixelType::ValueType>));
  itkConceptMacro(RealTypeHasNumericTraitsCheck, (itk::Concept::HasNumericTraits<RealType>));

#endif

  itkGetMacro(Threshold, TRealType);
  itkSetMacro(Threshold, TRealType);

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

  void
  ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread, itk::ThreadIdType threadId) override;

  const itk::ImageRegionSplitterBase *
                                             GetImageRegionSplitter() const override;
  itk::ImageRegionSplitterDirection::Pointer m_Splitter;

private:
  TRealType m_Threshold;
};
} // namespace rtk

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

#endif