itkMatchCardinalityImageToImageMetric.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 itkMatchCardinalityImageToImageMetric_h
#define itkMatchCardinalityImageToImageMetric_h

#include "itkImageToImageMetric.h"
#include "itkPoint.h"
#include <vector>

namespace itk
{
template< typename TFixedImage, typename TMovingImage >
class ITK_TEMPLATE_EXPORT MatchCardinalityImageToImageMetric:
  public ImageToImageMetric< TFixedImage, TMovingImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(MatchCardinalityImageToImageMetric);

  using Self = MatchCardinalityImageToImageMetric;
  using Superclass = ImageToImageMetric< TFixedImage, TMovingImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(MatchCardinalityImageToImageMetric, ImageToImageMetric);

  using RealType = typename Superclass::RealType;
  using TransformType = typename Superclass::TransformType;
  using TransformPointer = typename Superclass::TransformPointer;
  using TransformParametersType = typename Superclass::TransformParametersType;
  using TransformJacobianType = typename Superclass::TransformJacobianType;
  using GradientPixelType = typename Superclass::GradientPixelType;

  using MeasureType = typename Superclass::MeasureType;
  using DerivativeType = typename Superclass::DerivativeType;
  using FixedImageType = typename Superclass::FixedImageType;
  using MovingImageType = typename Superclass::MovingImageType;
  using FixedImageConstPointer = typename Superclass::FixedImageConstPointer;
  using MovingImageConstPointer = typename Superclass::MovingImageConstPointer;
  using FixedImageRegionType = typename Superclass::FixedImageRegionType;

  void GetDerivative(const TransformParametersType &,
                     DerivativeType & derivative) const override
  {
    itkWarningMacro(<< "This metric does not provide metric derivatives.");
    derivative.Fill(NumericTraits< typename DerivativeType::ValueType >::ZeroValue());
  }

  MeasureType GetValue(const TransformParametersType & parameters) const override;

  itkSetMacro(MeasureMatches, bool);
  itkBooleanMacro(MeasureMatches);
  itkGetConstMacro(MeasureMatches, bool);

  MultiThreaderBase * GetMultiThreader()
  { return m_Threader; }

protected:
  MatchCardinalityImageToImageMetric();
  ~MatchCardinalityImageToImageMetric() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

  MeasureType GetNonconstValue(const TransformParametersType & parameters);

  virtual
  void ThreadedGetValue(const FixedImageRegionType & outputRegionForThread,
                        ThreadIdType threadId);

  virtual
  ThreadIdType SplitFixedRegion(ThreadIdType i, int num, FixedImageRegionType & splitRegion);

  static ITK_THREAD_RETURN_FUNCTION_CALL_CONVENTION ThreaderCallback(void *arg);

  struct ThreadStruct {
    Pointer Metric;
  };

private:
  bool                         m_MeasureMatches;
  std::vector< MeasureType >   m_ThreadMatches;
  std::vector< SizeValueType > m_ThreadCounts;

  MultiThreaderBase::Pointer m_Threader;
};
} // end namespace itk

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

#endif