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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkShapePriorMAPCostFunctionBase.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkShapePriorMAPCostFunctionBase_h
#define __itkShapePriorMAPCostFunctionBase_h
#include "itkSingleValuedCostFunction.h"
#include "itkLevelSet.h"
#include "itkShapeSignedDistanceFunction.h"
namespace itk
{
/** \class ShapePriorMAPCostFunctionBase
* \brief Represents the base class of maximum aprior (MAP) cost function used
* ShapePriorSegmentationLevelSetImageFilter to estimate the shape paramaeters.
*
* This class follows the shape and pose parameters estimation developed in [1].
*
* This class has two template parameters, the feature image type representing the
* edge potential map and the pixel type used to
* represent the output level set in the ShapePriorSegmentationLevelSetImageFilter.
*
* \sa ShapePriorSegmentationLevelSetImageFilter
*
* \par REFERENCES
* \par
* [1] Leventon, M.E. et al. "Statistical Shape Influence in Geodesic Active Contours", CVPR 2000.
*
*
* \ingroup Numerics Optimizers
*/
template <class TFeatureImage, class TOutputPixel>
class ITK_EXPORT ShapePriorMAPCostFunctionBase :
public SingleValuedCostFunction
{
public:
/** Standard class typedefs. */
typedef ShapePriorMAPCostFunctionBase Self;
typedef SingleValuedCostFunction Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro( ShapePriorMAPCostFunctionBase, SingleValuedCostFunction );
/** MeasureType typedef.
* It defines a type used to return the cost function value. */
typedef typename Superclass::MeasureType MeasureType;
/** DerivativeType typedef.
* It defines a type used to return the cost function derivative. */
typedef typename Superclass::DerivativeType DerivativeType;
/** ParametersType typedef.
* It defines a position in the optimization search space. */
typedef typename Superclass::ParametersType ParametersType;
/** Type of the feature image representing the edge potential map. */
typedef TFeatureImage FeatureImageType;
typedef typename FeatureImageType::ConstPointer FeatureImagePointer;
/** Dimension constant. */
itkStaticConstMacro( ImageDimension, unsigned int, TFeatureImage::ImageDimension);
/** Type of pixel used to represent the level set. */
typedef TOutputPixel PixelType;
/** Type of node used to represent the active region around the zero set. */
typedef LevelSetNode<PixelType, itkGetStaticConstMacro(ImageDimension)> NodeType;
/** Type of container used to store the level set nodes. */
typedef VectorContainer<unsigned int, NodeType> NodeContainerType;
typedef typename NodeContainerType::ConstPointer NodeContainerPointer;
/** Type of the shape signed distance function. */
typedef ShapeSignedDistanceFunction<double,
itkGetStaticConstMacro(ImageDimension)> ShapeFunctionType;
typedef typename ShapeFunctionType::Pointer ShapeFunctionPointer;
/** Set/Get the shape distance function. */
itkSetObjectMacro( ShapeFunction, ShapeFunctionType );
itkGetObjectMacro( ShapeFunction, ShapeFunctionType );
/** Set/Get the active region. */
itkSetConstObjectMacro( ActiveRegion, NodeContainerType );
itkGetConstObjectMacro( ActiveRegion, NodeContainerType );
/** Set/Get the feature image. */
itkSetConstObjectMacro( FeatureImage, FeatureImageType );
itkGetConstObjectMacro( FeatureImage, FeatureImageType );
/** This method returns the value of the cost function corresponding
* to the specified parameters. */
virtual MeasureType GetValue( const ParametersType & parameters ) const;
/** This method returns the derivative of the cost function corresponding
* to the specified parameters. */
virtual void GetDerivative( const ParametersType &, DerivativeType & ) const
{ itkExceptionMacro( << "This function is currently not supported." ); }
/** Return the number of parameters. */
virtual unsigned int GetNumberOfParameters(void) const
{ return m_ShapeFunction->GetNumberOfParameters(); }
/** Compute the inside term component of the MAP cost function.
* Subclasses should override this function */
virtual MeasureType ComputeLogInsideTerm( const ParametersType & ) const = 0;
/** Compute the gradient term component of the MAP cost function.
* Subclasses should override this function */
virtual MeasureType ComputeLogGradientTerm( const ParametersType & ) const = 0;
/** Compute the shape prior component of the MAP cost function.
* Subclasses should override this function */
virtual MeasureType ComputeLogShapePriorTerm( const ParametersType & ) const = 0;
/** Compute the pose prior component of the MAP cost function.
* Subclasses should override this function */
virtual MeasureType ComputeLogPosePriorTerm( const ParametersType & ) const = 0;
/** Initialize the cost function by making sure that all the components
* are present. */
virtual void Initialize(void) throw ( ExceptionObject );
protected:
ShapePriorMAPCostFunctionBase();
virtual ~ShapePriorMAPCostFunctionBase() {};
void PrintSelf(std::ostream& os, Indent indent) const;
ShapeFunctionPointer m_ShapeFunction;
NodeContainerPointer m_ActiveRegion;
FeatureImagePointer m_FeatureImage;
private:
ShapePriorMAPCostFunctionBase(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkShapePriorMAPCostFunctionBase.txx"
#endif
#endif
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