itkGaussianSmoothingOnUpdateDisplacementFieldTransform.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
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#ifndef __itkGaussianSmoothingOnUpdateDisplacementFieldTransform_h
#define __itkGaussianSmoothingOnUpdateDisplacementFieldTransform_h

#include "itkDisplacementFieldTransform.h"

#include "itkGaussianOperator.h"
#include "itkVectorNeighborhoodOperatorImageFilter.h"

namespace itk
{

template
  <class TScalar, unsigned int NDimensions>
class GaussianSmoothingOnUpdateDisplacementFieldTransform :
  public DisplacementFieldTransform<TScalar, NDimensions>
{
public:
  typedef GaussianSmoothingOnUpdateDisplacementFieldTransform   Self;
  typedef DisplacementFieldTransform<TScalar, NDimensions>      Superclass;
  typedef SmartPointer<Self>                                    Pointer;
  typedef SmartPointer<const Self>                              ConstPointer;

  itkTypeMacro( GaussianSmoothingOnUpdateDisplacementFieldTransform,
                                                DisplacementFieldTransform );

  itkNewMacro( Self );

  typedef typename Superclass::ScalarType               ScalarType;
  typedef typename Superclass::DerivativeType           DerivativeType;
  typedef typename DerivativeType::ValueType            DerivativeValueType;
  typedef typename Superclass::DisplacementFieldType    DisplacementFieldType;
  typedef typename Superclass::DisplacementFieldPointer DisplacementFieldPointer;
  typedef typename DisplacementFieldType::PixelType     DisplacementVectorType;

  typedef typename Transform<TScalar,NDimensions,NDimensions>::Pointer
          TransformPointer;

  itkSetMacro( GaussianSmoothingVarianceForTheUpdateField, ScalarType );
  itkGetConstReferenceMacro( GaussianSmoothingVarianceForTheUpdateField, ScalarType );

  itkSetMacro( GaussianSmoothingVarianceForTheTotalField, ScalarType );
  itkGetConstReferenceMacro( GaussianSmoothingVarianceForTheTotalField, ScalarType );

  virtual void UpdateTransformParameters( const DerivativeType & update, ScalarType factor = 1.0 );

  virtual DisplacementFieldPointer GaussianSmoothDisplacementField( DisplacementFieldType *, ScalarType );

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

  virtual typename LightObject::Pointer InternalClone() const;

  ScalarType                        m_GaussianSmoothingVarianceForTheUpdateField;
  ScalarType                        m_GaussianSmoothingVarianceForTheTotalField;

  typedef GaussianOperator<ScalarType, Superclass::Dimension>
                                                  GaussianSmoothingOperatorType;
  typedef VectorNeighborhoodOperatorImageFilter< DisplacementFieldType,
                                                 DisplacementFieldType >
                                                  GaussianSmoothingSmootherType;
  GaussianSmoothingOperatorType                    m_GaussianSmoothingOperator;

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

};

} // end namespace itk

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

#endif // __itkGaussianSmoothingOnUpdateDisplacementFieldTransform_h