itkLandweberDeconvolutionImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software 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
 *
 *         http://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 "itkTernaryFunctorImageFilter.h"

namespace itk
{
namespace Functor
{
template< class TInput1, class TInput2, class TInput3, class TOutput >
class LandweberMethod
{
public:
  LandweberMethod() {}
  ~LandweberMethod() {}

  bool operator!=(const LandweberMethod &) const
  {
    return false;
  }

  bool operator==(const LandweberMethod & other) const
  {
    return !( *this != other );
  }

  inline TOutput operator()(const TInput1 & estimateFT,
                            const TInput2 & kernelFT,
                            const TInput2 & inputFT) const
  {
    return m_Alpha * std::conj( kernelFT ) * inputFT +
      ( 1.0 - m_Alpha * std::norm( kernelFT ) ) * estimateFT;
  }

  typename TInput1::value_type m_Alpha;

};
} // end namespace Functor

template< class TInputImage, class TKernelImage=TInputImage, class TOutputImage=TInputImage >
class ITK_EXPORT LandweberDeconvolutionImageFilter :
    public IterativeDeconvolutionImageFilter< TInputImage, TKernelImage, TOutputImage >
{
public:
  typedef LandweberDeconvolutionImageFilter                 Self;
  typedef IterativeDeconvolutionImageFilter< TInputImage,
                                             TKernelImage,
                                             TOutputImage > Superclass;
  typedef SmartPointer< Self >                              Pointer;
  typedef SmartPointer< const Self >                        ConstPointer;

  typedef TInputImage  InputImageType;
  typedef TKernelImage KernelImageType;
  typedef TOutputImage OutputImageType;

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

  itkNewMacro(Self);

  itkTypeMacro(LandweberDeconvolutionImageFilter,
               IterativeDeconvolutionImageFilter);

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

protected:
  LandweberDeconvolutionImageFilter();
  virtual ~LandweberDeconvolutionImageFilter();

  virtual void Initialize(ProgressAccumulator * progress,
                          float progressWeight,
                          float iterationProgressWeight);

  virtual void Iteration(ProgressAccumulator * progress,
                         float iterationProgressWeight);

  virtual void Finish(ProgressAccumulator *progress, float progressWeight);

  typedef typename Superclass::FFTFilterType  FFTFilterType;
  typedef typename Superclass::IFFTFilterType IFFTFilterType;

  virtual void PrintSelf(std::ostream & os, Indent indent) const;

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

  double m_Alpha;

  InternalComplexImagePointerType m_TransformedInput;

  typedef Functor::LandweberMethod< InternalComplexType,
                                    InternalComplexType,
                                    InternalComplexType,
                                    InternalComplexType > LandweberFunctor;
  typedef TernaryFunctorImageFilter< InternalComplexImageType,
                                     InternalComplexImageType,
                                     InternalComplexImageType,
                                     InternalComplexImageType,
                                     LandweberFunctor >   LandweberFilterType;

  typename LandweberFilterType::Pointer  m_LandweberFilter;
  typename IFFTFilterType::Pointer       m_IFFTFilter;
};

} // end namespace itk

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

#endif