rtkSeparableQuadraticSurrogateRegularizationImageFilter.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 rtkSeparableQuadraticSurrogateRegularizationImageFilter_h
#define rtkSeparableQuadraticSurrogateRegularizationImageFilter_h

#include <itkConstNeighborhoodIterator.h>
#include <itkImageRegionIterator.h>
#include <itkImageToImageFilter.h>

namespace rtk
{

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

  using Self = SeparableQuadraticSurrogateRegularizationImageFilter;
  using Superclass = itk::ImageToImageFilter<TImage, TImage>;
  using Pointer = itk::SmartPointer<Self>;

  itkNewMacro(Self);

#ifdef itkOverrideGetNameOfClassMacro
  itkOverrideGetNameOfClassMacro(SeparableQuadraticSurrogateRegularizationImageFilter);
#else
  itkTypeMacro(SeparableQuadraticSurrogateRegularizationImageFilter, itk::ImageToImageFilter);
#endif


  itkSetMacro(Radius, typename TImage::RegionType::SizeType);
  itkGetMacro(Radius, typename TImage::RegionType::SizeType);

  itkSetMacro(RegularizationWeights, typename TImage::PixelType);
  itkGetMacro(RegularizationWeights, typename TImage::PixelType);

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

  itk::ProcessObject::DataObjectPointer
  MakeOutput(itk::ProcessObject::DataObjectPointerArraySizeType idx) override;
  itk::ProcessObject::DataObjectPointer
  MakeOutput(const itk::ProcessObject::DataObjectIdentifierType &) override;

  void
  DynamicThreadedGenerateData(const typename TImage::RegionType & outputRegionForThread) override;
  void
  GenerateInputRequestedRegion() override;

  typename TImage::PixelType
  GreenPriorFirstDerivative(typename TImage::PixelType pix);
  typename TImage::PixelType
  GreenPriorSecondDerivative(typename TImage::PixelType pix);

  typename TImage::RegionType::SizeType                            m_Radius;
  typename itk::PixelTraits<typename TImage::PixelType>::ValueType m_C1;
  typename itk::PixelTraits<typename TImage::PixelType>::ValueType m_C2;
  typename TImage::PixelType                                       m_RegularizationWeights;
};
} // namespace rtk


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

#endif