itkPointSetToImageMetric.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
 *
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 *  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 __itkPointSetToImageMetric_h
#define __itkPointSetToImageMetric_h

#include "itkImageBase.h"
#include "itkTransform.h"
#include "itkInterpolateImageFunction.h"
#include "itkSingleValuedCostFunction.h"
#include "itkMacro.h"
#include "itkGradientRecursiveGaussianImageFilter.h"

namespace itk
{
template< class TFixedPointSet,  class TMovingImage >
class ITK_EXPORT PointSetToImageMetric:public SingleValuedCostFunction
{
public:
  typedef PointSetToImageMetric      Self;
  typedef SingleValuedCostFunction   Superclass;
  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;

  typedef Superclass::ParametersValueType CoordinateRepresentationType;

  itkTypeMacro(PointSetToImageMetric, SingleValuedCostFunction);

  typedef TMovingImage                           MovingImageType;
  typedef typename TMovingImage::PixelType       MovingImagePixelType;
  typedef typename MovingImageType::ConstPointer MovingImageConstPointer;

  typedef TFixedPointSet                           FixedPointSetType;
  typedef typename FixedPointSetType::ConstPointer FixedPointSetConstPointer;

  itkStaticConstMacro(MovingImageDimension, unsigned int,
                      TMovingImage::ImageDimension);
  itkStaticConstMacro(FixedPointSetDimension, unsigned int,
                      TFixedPointSet::PointDimension);

  typedef typename FixedPointSetType::PointsContainer::ConstIterator    PointIterator;
  typedef typename FixedPointSetType::PointDataContainer::ConstIterator PointDataIterator;

  typedef Transform< CoordinateRepresentationType,
                     itkGetStaticConstMacro(MovingImageDimension),
                     itkGetStaticConstMacro(FixedPointSetDimension) > TransformType;

  typedef typename TransformType::Pointer         TransformPointer;
  typedef typename TransformType::InputPointType  InputPointType;
  typedef typename TransformType::OutputPointType OutputPointType;
  typedef typename TransformType::ParametersType  TransformParametersType;
  typedef typename TransformType::JacobianType    TransformJacobianType;

  typedef InterpolateImageFunction<
    MovingImageType,
    CoordinateRepresentationType > InterpolatorType;

  typedef typename NumericTraits< MovingImagePixelType >::RealType RealType;
  typedef CovariantVector< RealType,
                           itkGetStaticConstMacro(MovingImageDimension) > GradientPixelType;
  typedef Image< GradientPixelType,
                 itkGetStaticConstMacro(MovingImageDimension) > GradientImageType;
  typedef SmartPointer< GradientImageType > GradientImagePointer;
  typedef GradientRecursiveGaussianImageFilter< MovingImageType,
                                                GradientImageType >
  GradientImageFilterType;

  typedef typename GradientImageFilterType::Pointer GradientImageFilterPointer;

  typedef typename InterpolatorType::Pointer InterpolatorPointer;

  typedef Superclass::MeasureType MeasureType;

  typedef Superclass::DerivativeType DerivativeType;

  typedef Superclass::ParametersType ParametersType;

  itkSetConstObjectMacro(FixedPointSet, FixedPointSetType);

  itkGetConstObjectMacro(FixedPointSet, FixedPointSetType);

  itkSetConstObjectMacro(MovingImage, MovingImageType);

  itkGetConstObjectMacro(MovingImage, MovingImageType);

  itkSetObjectMacro(Transform, TransformType);

  itkGetObjectMacro(Transform, TransformType);

  itkSetObjectMacro(Interpolator, InterpolatorType);

  itkGetObjectMacro(Interpolator, InterpolatorType);

  itkGetConstObjectMacro(GradientImage, GradientImageType);

  itkGetConstReferenceMacro(NumberOfPixelsCounted, SizeValueType);

  void SetTransformParameters(const ParametersType & parameters) const;

  itkSetMacro(ComputeGradient, bool);
  itkGetConstReferenceMacro(ComputeGradient, bool);

  unsigned int GetNumberOfParameters(void) const
  { return m_Transform->GetNumberOfParameters(); }

  virtual void Initialize(void)
  throw ( ExceptionObject );

protected:
  PointSetToImageMetric();
  virtual ~PointSetToImageMetric() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

  mutable SizeValueType m_NumberOfPixelsCounted;

  FixedPointSetConstPointer m_FixedPointSet;

  MovingImageConstPointer m_MovingImage;

  mutable TransformPointer m_Transform;

  InterpolatorPointer m_Interpolator;

  bool m_ComputeGradient;

  GradientImagePointer m_GradientImage;
private:
  PointSetToImageMetric(const Self &); //purposely not implemented
  void operator=(const Self &);        //purposely not implemented
};
} // end namespace itk

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

#endif