itk::ExhaustiveOptimizerv4< TInternalComputationValueType > Class Template Reference

#include <itkExhaustiveOptimizerv4.h>

Inheritance diagram for itk::ExhaustiveOptimizerv4< TInternalComputationValueType >:

Collaboration diagram for itk::ExhaustiveOptimizerv4< TInternalComputationValueType >:

Detailed Description

template<typename TInternalComputationValueType>
class itk::ExhaustiveOptimizerv4< TInternalComputationValueType >

Optimizer that fully samples a grid on the parametric space.

This optimizer is equivalent to an exahaustive search in a discrete grid defined over the parametric space. The grid is centered on the initial position. The subdivisions of the grid along each one of the dimensions of the parametric space is defined by an array of number of steps.

A typical use is to plot the metric space to get an idea of how noisy it is. An example is given below, where it is desired to plot the metric space with respect to translations along x, y and z in a 3D registration application: Here it is assumed that the transform is Euler3DTransform.

*  OptimizerType::StepsType steps( m_Transform->GetNumberOfParameters() );
*  steps[0] = 10;
*  steps[1] = 10;
*  steps[2] = 10;
*  m_Optimizer->SetNumberOfSteps( steps );
*  m_Optimizer->SetStepLength( 2 );
* 

The optimizer throws IterationEvents after every iteration. We use this to plot the metric space in an image as follows:

*  if( itk::IterationEvent().CheckEvent(& event ) )
*  {
*    IndexType index;
*    index[0] = m_Optimizer->GetCurrentIndex()[0];
*    index[1] = m_Optimizer->GetCurrentIndex()[1];
*    index[2] = m_Optimizer->GetCurrentIndex()[2];
*    image->SetPixel( index, m_Optimizer->GetCurrentValue() );
*  }
* 

The image size is expected to be 11 x 11 x 11.

If you wish to use different step lengths along each parametric axis, you can use the SetScales() method. This accepts an array, each element represents the number of subdivisions per step length. For instance scales of [0.5 1 4] along with a step length of 2 will cause the optimizer to search the metric space on a grid with x,y,z spacing of [1 2 8].

Physical dimensions of the grid are influenced by both the scales and the number of steps along each dimension, a side of the region is stepLength*(2*numberOfSteps[d]+1)*scaling[d].

Examples:

WikiExamples/Registration/ExhaustiveOptimizer.cxx.

Definition at line 78 of file itkExhaustiveOptimizerv4.h.

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef Superclass::MeasureType	MeasureType
typedef Superclass::ParametersType	ParametersType
typedef SmartPointer< Self >	Pointer
typedef Superclass::ScalesType	ScalesType
typedef ExhaustiveOptimizerv4	Self
typedef Array< SizeValueType >	StepsType
typedef ObjectToObjectOptimizerBaseTemplate < TInternalComputationValueType >	Superclass
Public Types inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
typedef SmartPointer< const Self >	ConstPointer
typedef MetricType::DerivativeType	DerivativeType
typedef MetricType::MeasureType	MeasureType
typedef ObjectToObjectMetricBaseTemplate < TInternalComputationValueType >	MetricType
typedef MetricType::Pointer	MetricTypePointer
typedef MetricType::NumberOfParametersType	NumberOfParametersType
typedef OptimizerParameters < TInternalComputationValueType >	ParametersType
typedef SmartPointer< Self >	Pointer
typedef OptimizerParameterScalesEstimatorTemplate < TInternalComputationValueType >	ScalesEstimatorType
typedef OptimizerParameters < TInternalComputationValueType >	ScalesType
typedef ObjectToObjectOptimizerBaseTemplate	Self
typedef std::ostringstream	StopConditionDescriptionType
typedef std::string	StopConditionReturnStringType
typedef Object	Superclass
Public Types inherited from itk::Object
typedef SmartPointer< const Self >	ConstPointer
typedef SmartPointer< Self >	Pointer
typedef Object	Self
typedef LightObject	Superclass
Public Types inherited from itk::LightObject
typedef SmartPointer< const Self >	ConstPointer
typedef SmartPointer< Self >	Pointer
typedef LightObject	Self

Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother () const
virtual const ParametersType &	GetCurrentIndex () const
virtual const MeasureType &	GetCurrentValue () const
ParametersType &	GetInitialPosition (void)
virtual const MeasureType &	GetMaximumMetricValue () const
virtual const ParametersType &	GetMaximumMetricValuePosition () const
virtual const MeasureType &	GetMinimumMetricValue () const
virtual const ParametersType &	GetMinimumMetricValuePosition () const
virtual const char *	GetNameOfClass () const
virtual const StepsType &	GetNumberOfSteps () const
virtual const double &	GetStepLength () const
virtual const std::string	GetStopConditionDescription () const override
void	ResumeWalking ()
void	SetInitialPosition (const ParametersType &param)
virtual void	SetNumberOfSteps (StepsType _arg)
virtual void	SetStepLength (double _arg)
virtual void	StartOptimization (bool doOnlyInitialization=false) override
void	StartWalking ()
void	StopWalking ()
Public Member Functions inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
virtual SizeValueType	GetCurrentIteration () const
virtual const MeasureType &	GetCurrentMetricValue () const
virtual const ParametersType &	GetCurrentPosition () const
virtual SizeValueType	GetNumberOfIterations () const
virtual const ThreadIdType &	GetNumberOfThreads () const
virtual const ScalesType &	GetScales () const
virtual const bool &	GetScalesAreIdentity () const
bool	GetScalesInitialized () const
virtual const MeasureType &	GetValue () const
virtual const ScalesType &	GetWeights () const
virtual const bool &	GetWeightsAreIdentity () const
virtual void	SetNumberOfIterations (SizeValueType _arg)
virtual void	SetNumberOfThreads (ThreadIdType number)
virtual void	SetScalesEstimator (ScalesEstimatorType *_arg)
virtual void	SetWeights (ScalesType _arg)
virtual void	SetMetric (MetricType *_arg)
virtual MetricType *	GetModifiableMetric ()
virtual const MetricType *	GetMetric () const
virtual void	SetScales (const ScalesType &scales)
virtual void	SetDoEstimateScales (bool _arg)
virtual const bool &	GetDoEstimateScales () const
virtual void	DoEstimateScalesOn ()
virtual void	DoEstimateScalesOff ()
Public Member Functions inherited from itk::Object
unsigned long	AddObserver (const EventObject &event, Command *)
unsigned long	AddObserver (const EventObject &event, Command *) const
virtual void	DebugOff () const
virtual void	DebugOn () const
Command *	GetCommand (unsigned long tag)
bool	GetDebug () const
MetaDataDictionary &	GetMetaDataDictionary ()
const MetaDataDictionary &	GetMetaDataDictionary () const
virtual ModifiedTimeType	GetMTime () const
virtual const TimeStamp &	GetTimeStamp () const
bool	HasObserver (const EventObject &event) const
void	InvokeEvent (const EventObject &)
void	InvokeEvent (const EventObject &) const
virtual void	Modified () const
virtual void	Register () const override
void	RemoveAllObservers ()
void	RemoveObserver (unsigned long tag)
void	SetDebug (bool debugFlag) const
void	SetMetaDataDictionary (const MetaDataDictionary &rhs)
virtual void	SetReferenceCount (int) override
virtual void	UnRegister () const noexceptoverride
virtual void	SetObjectName (std::string _arg)
virtual const std::string &	GetObjectName () const
Public Member Functions inherited from itk::LightObject
virtual void	Delete ()
virtual int	GetReferenceCount () const
	itkCloneMacro (Self)
void	Print (std::ostream &os, Indent indent=0) const

Static Public Member Functions
static Pointer	New ()
Static Public Member Functions inherited from itk::Object
static bool	GetGlobalWarningDisplay ()
static void	GlobalWarningDisplayOff ()
static void	GlobalWarningDisplayOn ()
static Pointer	New ()
static void	SetGlobalWarningDisplay (bool flag)
Static Public Member Functions inherited from itk::LightObject
static void	BreakOnError ()
static Pointer	New ()

Protected Member Functions
void	AdvanceOneStep ()
	ExhaustiveOptimizerv4 ()
void	IncrementIndex (ParametersType &param)
virtual void	PrintSelf (std::ostream &os, Indent indent) const override
virtual	~ExhaustiveOptimizerv4 () override
Protected Member Functions inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
	ObjectToObjectOptimizerBaseTemplate ()
virtual	~ObjectToObjectOptimizerBaseTemplate () override
Protected Member Functions inherited from itk::Object
	Object ()
bool	PrintObservers (std::ostream &os, Indent indent) const
virtual void	SetTimeStamp (const TimeStamp &time)
virtual	~Object () override
Protected Member Functions inherited from itk::LightObject
virtual LightObject::Pointer	InternalClone () const
	LightObject ()
virtual void	PrintHeader (std::ostream &os, Indent indent) const
virtual void	PrintTrailer (std::ostream &os, Indent indent) const
virtual	~LightObject ()

Protected Attributes
ParametersType	m_CurrentIndex
MeasureType	m_CurrentValue
ParametersType	m_InitialPosition
MeasureType	m_MaximumMetricValue
ParametersType	m_MaximumMetricValuePosition
MeasureType	m_MinimumMetricValue
ParametersType	m_MinimumMetricValuePosition
StepsType	m_NumberOfSteps
double	m_StepLength
bool	m_Stop
Protected Attributes inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
SizeValueType	m_CurrentIteration
MeasureType	m_CurrentMetricValue
bool	m_DoEstimateScales
MetricTypePointer	m_Metric
SizeValueType	m_NumberOfIterations
ThreadIdType	m_NumberOfThreads
ScalesType	m_Scales
bool	m_ScalesAreIdentity
ScalesEstimatorType::Pointer	m_ScalesEstimator
ScalesType	m_Weights
bool	m_WeightsAreIdentity
Protected Attributes inherited from itk::LightObject
AtomicInt< int >	m_ReferenceCount

Private Attributes
std::ostringstream	m_StopConditionDescription

Member Typedef Documentation

template<typename TInternalComputationValueType >

typedef SmartPointer< const Self > itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ConstPointer

Definition at line 86 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef Superclass::MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::MeasureType

Measure type

Definition at line 98 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef Superclass::ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ParametersType

Parameters type

Definition at line 101 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef SmartPointer< Self > itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::Pointer

Definition at line 85 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef Superclass::ScalesType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ScalesType

Scales type

Definition at line 104 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef ExhaustiveOptimizerv4 itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::Self

Standard "Self" typedef.

Definition at line 83 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef Array< SizeValueType > itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StepsType

Steps type

Definition at line 92 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

typedef ObjectToObjectOptimizerBaseTemplate<TInternalComputationValueType> itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::Superclass

Definition at line 84 of file itkExhaustiveOptimizerv4.h.

Constructor & Destructor Documentation

template<typename TInternalComputationValueType >

itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ExhaustiveOptimizerv4 ( )

protected

template<typename TInternalComputationValueType >

virtual itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::~ExhaustiveOptimizerv4 ( )

inlineoverrideprotectedvirtual

Definition at line 142 of file itkExhaustiveOptimizerv4.h.

Member Function Documentation

template<typename TInternalComputationValueType >

void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::AdvanceOneStep ( )

protected

Advance to the next grid position.

template<typename TInternalComputationValueType >

virtual::itk::LightObject::Pointer itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::CreateAnother ( ) const

virtual

Create an object from an instance, potentially deferring to a factory. This method allows you to create an instance of an object that is exactly the same type as the referring object. This is useful in cases where an object has been cast back to a base class.

Reimplemented from itk::Object.

template<typename TInternalComputationValueType >

virtual const ParametersType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetCurrentIndex ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const MeasureType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetCurrentValue ( ) const

virtual

template<typename TInternalComputationValueType >

ParametersType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetInitialPosition ( void  )

inline

Get the position to initialize the optimization.

Definition at line 135 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

virtual const MeasureType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetMaximumMetricValue ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const ParametersType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetMaximumMetricValuePosition ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const MeasureType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetMinimumMetricValue ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const ParametersType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetMinimumMetricValuePosition ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const char* itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

Reimplemented from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

template<typename TInternalComputationValueType >

virtual const StepsType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetNumberOfSteps ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const double& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetStepLength ( ) const

virtual

template<typename TInternalComputationValueType >

virtual const std::string itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetStopConditionDescription ( ) const

overridevirtual

Get the reason for termination

Implements itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

template<typename TInternalComputationValueType >

void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::IncrementIndex ( ParametersType &  param )

protected

template<typename TInternalComputationValueType >

static Pointer itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::New ( )

static

Method for creation through the object factory.

template<typename TInternalComputationValueType >

virtual void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::PrintSelf ( std::ostream &  os, Indent  indent  ) const

overrideprotectedvirtual

Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

template<typename TInternalComputationValueType >

void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ResumeWalking

(

)

Resume the optimization

template<typename TInternalComputationValueType >

void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::SetInitialPosition

(

const ParametersType &

param

)

Set the position to initialize the optimization.

template<typename TInternalComputationValueType >

virtual void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::SetNumberOfSteps ( StepsType  _arg )

virtual

template<typename TInternalComputationValueType >

virtual void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::SetStepLength ( double  _arg )

virtual

template<typename TInternalComputationValueType >

virtual void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StartOptimization ( bool  doOnlyInitialization = false )

overridevirtual

Run the optimization.

Parameters

doOnlyInitialization

This is false by default. It should only be set to true for special cases when the class should be initialized to perform optimization, but no optimization should be run. For example, itkMultiGradientOptimizerv4 needs to do this.

Note

Derived classes must override and call this superclass method, then perform any additional initialization before performing optimization.

Reimplemented from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

template<typename TInternalComputationValueType >

void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StartWalking

(

)

Start optimization

template<typename TInternalComputationValueType >

void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StopWalking

(

)

Stop optimization

Member Data Documentation

template<typename TInternalComputationValueType >

ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_CurrentIndex

protected

Definition at line 156 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_CurrentValue

protected

Definition at line 152 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_InitialPosition

protected

Definition at line 151 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MaximumMetricValue

protected

Definition at line 157 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MaximumMetricValuePosition

protected

Definition at line 160 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MinimumMetricValue

protected

Definition at line 158 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MinimumMetricValuePosition

protected

Definition at line 159 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

StepsType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_NumberOfSteps

protected

Definition at line 153 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

double itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_StepLength

protected

Definition at line 155 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

bool itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_Stop

protected

Definition at line 154 of file itkExhaustiveOptimizerv4.h.

template<typename TInternalComputationValueType >

std::ostringstream itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_StopConditionDescription

private

Definition at line 163 of file itkExhaustiveOptimizerv4.h.

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The documentation for this class was generated from the following file:

• itkExhaustiveOptimizerv4.h