#include <itkSingleValuedVnlCostFunctionAdaptor.h>

Inheritance diagram for itk::SingleValuedVnlCostFunctionAdaptor:

Collaboration diagram for itk::SingleValuedVnlCostFunctionAdaptor:

Detailed Description

This class is an Adaptor that allows to pass itk::SingleValuedCostFunctions to vnl_optimizers expecting a vnl_cost_function.

This class returns a single valued.

Definition at line 36 of file itkSingleValuedVnlCostFunctionAdaptor.h.

Public Types
typedef SingleValuedCostFunction::DerivativeType	DerivativeType

typedef vnl_vector< double >	InternalDerivativeType

typedef double	InternalMeasureType

typedef vnl_vector< double >	InternalParametersType

typedef SingleValuedCostFunction::MeasureType	MeasureType

typedef SingleValuedCostFunction::ParametersType	ParametersType

typedef Array< double >	ScalesType

Public Member Functions
unsigned long	AddObserver (const EventObject &event, Command *) const

virtual void	compute (const InternalParametersType &x, InternalMeasureType f, InternalDerivativeType g)

void	ConvertExternalToInternalGradient (const DerivativeType &input, InternalDerivativeType &output) const

virtual InternalMeasureType	f (const InternalParametersType &inparameters)

const ParametersType &	GetCachedCurrentParameters () const

const DerivativeType &	GetCachedDerivative () const

const MeasureType &	GetCachedValue () const

const SingleValuedCostFunction *	GetCostFunction (void) const

bool	GetNegateCostFunction () const

virtual void	gradf (const InternalParametersType &inparameters, InternalDerivativeType &gradient)

void	NegateCostFunctionOff ()

void	NegateCostFunctionOn ()

void	SetCostFunction (SingleValuedCostFunction *costFunction)

void	SetNegateCostFunction (bool value)

void	SetScales (const ScalesType &scales)

	SingleValuedVnlCostFunctionAdaptor (unsigned int spaceDimension)

Protected Member Functions
void	ReportIteration (const EventObject &event) const

Private Attributes
ParametersType	m_CachedCurrentParameters

DerivativeType	m_CachedDerivative

MeasureType	m_CachedValue

SingleValuedCostFunction::Pointer	m_CostFunction

bool	m_NegateCostFunction

Object::Pointer	m_Reporter

ScalesType	m_Scales

bool	m_ScalesInitialized

Member Typedef Documentation

typedef SingleValuedCostFunction::DerivativeType itk::SingleValuedVnlCostFunctionAdaptor::DerivativeType

Derivatives of the SingleValuedCostFunction

Definition at line 54 of file itkSingleValuedVnlCostFunctionAdaptor.h.

typedef vnl_vector< double > itk::SingleValuedVnlCostFunctionAdaptor::InternalDerivativeType

InternalGradientType typedef.

Definition at line 48 of file itkSingleValuedVnlCostFunctionAdaptor.h.

typedef double itk::SingleValuedVnlCostFunctionAdaptor::InternalMeasureType

InternalMeasureType typedef.

Definition at line 45 of file itkSingleValuedVnlCostFunctionAdaptor.h.

typedef vnl_vector< double > itk::SingleValuedVnlCostFunctionAdaptor::InternalParametersType

InternalParametersType typedef.

Definition at line 42 of file itkSingleValuedVnlCostFunctionAdaptor.h.

typedef SingleValuedCostFunction::MeasureType itk::SingleValuedVnlCostFunctionAdaptor::MeasureType

Type of the SingleValuedCostFunction value

Definition at line 57 of file itkSingleValuedVnlCostFunctionAdaptor.h.

typedef SingleValuedCostFunction::ParametersType itk::SingleValuedVnlCostFunctionAdaptor::ParametersType

Parameters of the SingleValuedCostFunction

Definition at line 51 of file itkSingleValuedVnlCostFunctionAdaptor.h.

typedef Array< double > itk::SingleValuedVnlCostFunctionAdaptor::ScalesType

Scales typedef

Definition at line 60 of file itkSingleValuedVnlCostFunctionAdaptor.h.

Constructor & Destructor Documentation

itk::SingleValuedVnlCostFunctionAdaptor::SingleValuedVnlCostFunctionAdaptor ( unsigned int spaceDimension )

Constructor with size

Member Function Documentation

unsigned long itk::SingleValuedVnlCostFunctionAdaptor::AddObserver	(	const EventObject &	event,
		Command *
	)		const

This AddObserver method allows to simulate that this class derives from an itkObject for the purpose of reporting iteration events. The goal of this method is to allow ITK-vnl optimizer adaptors to get iteration events despite the fact that VNL does not provide callbacks.

virtual void itk::SingleValuedVnlCostFunctionAdaptor::compute	(	const InternalParametersType &	x,
		InternalMeasureType *	f,
		InternalDerivativeType *	g
	)

virtual

Delegate computation of value and gradient to the costFunction.

void itk::SingleValuedVnlCostFunctionAdaptor::ConvertExternalToInternalGradient	(	const DerivativeType &	input,
		InternalDerivativeType &	output
	)		const

Convert external derviative measures into internal type

virtual InternalMeasureType itk::SingleValuedVnlCostFunctionAdaptor::f ( const InternalParametersType & inparameters )

virtual

Delegate computation of the value to the CostFunction.

const ParametersType& itk::SingleValuedVnlCostFunctionAdaptor::GetCachedCurrentParameters ( ) const

const DerivativeType& itk::SingleValuedVnlCostFunctionAdaptor::GetCachedDerivative ( ) const

const MeasureType& itk::SingleValuedVnlCostFunctionAdaptor::GetCachedValue ( ) const

Return the value of the last evaluation to the value of the cost function. Note that this method DOES NOT triggers a computation of the function or the derivatives, it only returns previous values. Therefore the values here are only valid after you invoke the f() or gradf() methods.

const SingleValuedCostFunction* itk::SingleValuedVnlCostFunctionAdaptor::GetCostFunction ( void ) const

inline

Get the CostFunction deriving from SingleValuedCostFunction

Definition at line 70 of file itkSingleValuedVnlCostFunctionAdaptor.h.

bool itk::SingleValuedVnlCostFunctionAdaptor::GetNegateCostFunction ( ) const

virtual void itk::SingleValuedVnlCostFunctionAdaptor::gradf	(	const InternalParametersType &	inparameters,
		InternalDerivativeType &	gradient
	)

virtual

Delegate computation of the gradient to the costFunction.

void itk::SingleValuedVnlCostFunctionAdaptor::NegateCostFunctionOff ( )

inline

Definition at line 106 of file itkSingleValuedVnlCostFunctionAdaptor.h.

void itk::SingleValuedVnlCostFunctionAdaptor::NegateCostFunctionOn ( )

inline

Definition at line 105 of file itkSingleValuedVnlCostFunctionAdaptor.h.

void itk::SingleValuedVnlCostFunctionAdaptor::ReportIteration ( const EventObject & event ) const

protected

This method is intended to be called by the derived classes in order to notify of an iteration event to any Command/Observers

void itk::SingleValuedVnlCostFunctionAdaptor::SetCostFunction ( SingleValuedCostFunction * costFunction )

inline

Set the CostFunction deriving from SingleValuedCostFunction

Definition at line 66 of file itkSingleValuedVnlCostFunctionAdaptor.h.

void itk::SingleValuedVnlCostFunctionAdaptor::SetNegateCostFunction ( bool value )

Set/Get Negate cost function. The purpose of this boolean flag is to make possible to take certain VNL optimizers that are only minimizers, and use them for maximizing functions. When the boolean flag is set to true, the values returned by GetValue in the internal ITK cost function will be multiplied by -1 before returning it in the f() function. Similar operations will be done for the gradf() and compute() methods. When the boolean flag is set to false, then the values returned by the ITK cost function will be passed unchanged to the VNL optimizers.

void itk::SingleValuedVnlCostFunctionAdaptor::SetScales ( const ScalesType & scales )

Set current parameters scaling.