itkWarpHarmonicEnergyCalculator.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 __itkWarpHarmonicEnergyCalculator_h
#define __itkWarpHarmonicEnergyCalculator_h

#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itkConstNeighborhoodIterator.h"
#include "itkVector.h"

namespace itk
{
template< class TInputImage >
class ITK_EXPORT WarpHarmonicEnergyCalculator:public Object
{
public:
  typedef WarpHarmonicEnergyCalculator Self;
  typedef Object                       Superclass;
  typedef SmartPointer< Self >         Pointer;
  typedef SmartPointer< const Self >   ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(WarpHarmonicEnergyCalculator, Object);

  typedef TInputImage ImageType;

  typedef typename TInputImage::Pointer ImagePointer;

  typedef typename TInputImage::ConstPointer ImageConstPointer;

  typedef typename TInputImage::PixelType PixelType;

  typedef typename TInputImage::IndexType IndexType;

  typedef typename TInputImage::RegionType RegionType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

  itkStaticConstMacro(VectorDimension, unsigned int,
                      PixelType::Dimension);

  typedef ConstNeighborhoodIterator< ImageType >             ConstNeighborhoodIteratorType;
  typedef typename ConstNeighborhoodIteratorType::RadiusType RadiusType;

  void SetUseImageSpacingOn()
  {
    this->SetUseImageSpacing(true);
  }

  void SetUseImageSpacingOff()
  {
    this->SetUseImageSpacing(false);
  }

  void SetUseImageSpacing(bool);

  itkGetConstMacro(UseImageSpacing, bool);

  typedef FixedArray< double, ImageDimension > WeightsType;

  itkSetMacro(DerivativeWeights, WeightsType);
  itkGetConstReferenceMacro(DerivativeWeights, WeightsType);

  itkSetConstObjectMacro(Image, ImageType);

  void Compute(void);

  itkGetConstMacro(HarmonicEnergy, double);

  void SetRegion(const RegionType & region);

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

  itkGetConstReferenceMacro(NeighborhoodRadius, RadiusType);
  itkSetMacro(NeighborhoodRadius, RadiusType);

  double EvaluateAtNeighborhood(ConstNeighborhoodIteratorType & it) const;

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

  double            m_HarmonicEnergy;
  ImageConstPointer m_Image;

  RegionType m_Region;
  bool       m_RegionSetByUser;

  bool m_UseImageSpacing;

  WeightsType m_DerivativeWeights;

  RadiusType m_NeighborhoodRadius;
};
} // end namespace itk

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

#endif /* __itkWarpHarmonicEnergyCalculator_h */