itkLandweberDeconvolutionImageFilter.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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 itkLandweberDeconvolutionImageFilter_h
#define itkLandweberDeconvolutionImageFilter_h
 
#include "itkIterativeDeconvolutionImageFilter.h"
 
#include "itkComplexConjugateImageAdaptor.h"
#include "itkTernaryGeneratorImageFilter.h"
 
namespace itk
{
namespace Functor
{
template <typename TInput1, typename TInput2, typename TInput3, typename TOutput>
class ITK_TEMPLATE_EXPORT LandweberMethod
{
public:
  bool
  operator==(const LandweberMethod &) const
  {
    return true;
  }
 
  ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(LandweberMethod);
 
  inline TOutput
  operator()(const TInput1 & estimateFT, const TInput2 & kernelFT, const TInput2 & inputFT) const
  {
    return m_Alpha * std::conj(kernelFT) * inputFT +
           (NumericTraits<typename TInput1::value_type>::OneValue() - m_Alpha * std::norm(kernelFT)) * estimateFT;
  }
 
  typename TInput1::value_type m_Alpha;
};
} // end namespace Functor

template <typename TInputImage,
          typename TKernelImage = TInputImage,
          typename TOutputImage = TInputImage,
          typename TInternalPrecision = double>
class ITK_TEMPLATE_EXPORT LandweberDeconvolutionImageFilter
  : public IterativeDeconvolutionImageFilter<TInputImage, TKernelImage, TOutputImage, TInternalPrecision>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(LandweberDeconvolutionImageFilter);

  using Self = LandweberDeconvolutionImageFilter;
  using Superclass = IterativeDeconvolutionImageFilter<TInputImage, TKernelImage, TOutputImage, TInternalPrecision>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  using InputImageType = TInputImage;
  using KernelImageType = TKernelImage;
  using OutputImageType = TOutputImage;

  using typename Superclass::InternalImageType;
  using typename Superclass::InternalImagePointerType;
  using typename Superclass::InternalComplexType;
  using typename Superclass::InternalComplexImageType;
  using typename Superclass::InternalComplexImagePointerType;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(LandweberDeconvolutionImageFilter);

  itkSetMacro(Alpha, double);
  itkGetMacro(Alpha, double);
 
protected:
  LandweberDeconvolutionImageFilter();
  ~LandweberDeconvolutionImageFilter() override;
 
  void
  Initialize(ProgressAccumulator * progress, float progressWeight, float iterationProgressWeight) override;
 
  void
  Iteration(ProgressAccumulator * progress, float iterationProgressWeight) override;
 
  void
  Finish(ProgressAccumulator * progress, float progressWeight) override;
 
  using typename Superclass::FFTFilterType;
  using typename Superclass::IFFTFilterType;
 
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
private:
  double m_Alpha{};
 
  InternalComplexImagePointerType m_TransformedInput{};
 
  using LandweberFunctor =
    Functor::LandweberMethod<InternalComplexType, InternalComplexType, InternalComplexType, InternalComplexType>;
  using LandweberFilterType = TernaryGeneratorImageFilter<InternalComplexImageType,
                                                          InternalComplexImageType,
                                                          InternalComplexImageType,
                                                          InternalComplexImageType>;
 
  typename LandweberFilterType::Pointer m_LandweberFilter{};
  typename IFFTFilterType::Pointer      m_IFFTFilter{};
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkLandweberDeconvolutionImageFilter.hxx"
#endif
 
#endif