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itk::ExhaustiveOptimizerv4< TInternalComputationValueType > Class Template Reference
Group Numerics » Module ITKOptimizersv4

#include <itkExhaustiveOptimizerv4.h>

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 exhaustive 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 TranslationTransform.

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].

The number of samples for each dimension of the parameter grid are influenced by both the scales and the number of steps along each dimension:

parameter_samples[d] = stepLength*(2*numberOfSteps[d]+1)*scaling[d]

start_parameter[d] = - stepLength * scaling[d] * numberOfSteps[d] end_parameter[d] = + stepLength * scaling[d] * numberOfSteps[d]

Examples
SphinxExamples/src/Numerics/Optimizers/ExhaustiveOptimizer/Code.cxx.

Definition at line 84 of file itkExhaustiveOptimizerv4.h.

+ Inheritance diagram for itk::ExhaustiveOptimizerv4< TInternalComputationValueType >:
+ Collaboration diagram for itk::ExhaustiveOptimizerv4< TInternalComputationValueType >:

Public Types

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

Public Member Functions

virtual const ParametersType & GetCurrentIndex () const
 
virtual const MeasureType & GetCurrentValue () const
 
ParametersType & GetInitialPosition ()
 
virtual const MeasureType & GetMaximumMetricValue () const
 
virtual const ParametersType & GetMaximumMetricValuePosition () const
 
virtual const MeasureType & GetMinimumMetricValue () const
 
virtual const ParametersType & GetMinimumMetricValuePosition () const
 
const char * GetNameOfClass () const override
 
virtual const StepsType & GetNumberOfSteps () const
 
virtual const double & GetStepLength () const
 
std::string GetStopConditionDescription () const override
 
void ResumeWalking ()
 
void SetInitialPosition (const ParametersType &param)
 
virtual void SetNumberOfSteps (StepsType _arg)
 
virtual void SetStepLength (double _arg)
 
void StartOptimization (bool doOnlyInitialization=false) override
 
void StartWalking ()
 
void StopWalking ()
 
- Public Member Functions inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
virtual bool CanUseScales () const
 
virtual SizeValueType GetCurrentIteration () const
 
virtual const MeasureType & GetCurrentMetricValue () const
 
virtual const ParametersType & GetCurrentPosition () const
 
const char * GetNameOfClass () const override
 
virtual SizeValueType GetNumberOfIterations () const
 
virtual const ThreadIdType & GetNumberOfWorkUnits () 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 SetNumberOfWorkUnits (ThreadIdType number)
 
virtual void SetScalesEstimator (ScalesEstimatorType *_arg)
 
virtual void SetWeights (ScalesType _arg)
 
virtual void SetMetric (MetricType *_arg)
 
virtual MetricType * GetModifiableMetric ()
 
virtual void SetScales (const ScalesType &scales)
 
virtual void SetDoEstimateScales (bool _arg)
 
virtual const bool & GetDoEstimateScales () const
 
virtual void DoEstimateScalesOn ()
 
- Public Member Functions inherited from itk::Object
unsigned long AddObserver (const EventObject &event, Command *cmd) const
 
unsigned long AddObserver (const EventObject &event, std::function< void(const EventObject &)> function) const
 
LightObject::Pointer CreateAnother () const override
 
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
 
void Register () const override
 
void RemoveAllObservers ()
 
void RemoveObserver (unsigned long tag) const
 
void SetDebug (bool debugFlag) const
 
void SetReferenceCount (int) override
 
void UnRegister () const noexcept override
 
void SetMetaDataDictionary (const MetaDataDictionary &rhs)
 
void SetMetaDataDictionary (MetaDataDictionary &&rrhs)
 
virtual void SetObjectName (std::string _arg)
 
virtual const std::string & GetObjectName () const
 
- Public Member Functions inherited from itk::LightObject
Pointer Clone () const
 
virtual void Delete ()
 
virtual int GetReferenceCount () const
 
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 val)
 
- Static Public Member Functions inherited from itk::LightObject
static void BreakOnError ()
 
static Pointer New ()
 

Protected Member Functions

void AdvanceOneStep ()
 
 ExhaustiveOptimizerv4 ()
 
void IncrementIndex (ParametersType &newPosition)
 
void PrintSelf (std::ostream &os, Indent indent) const override
 
 ~ExhaustiveOptimizerv4 () override=default
 
- Protected Member Functions inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
void PrintSelf (std::ostream &os, Indent indent) const override
 
 ObjectToObjectOptimizerBaseTemplate ()
 
 ~ObjectToObjectOptimizerBaseTemplate () override
 
- Protected Member Functions inherited from itk::Object
 Object ()
 
bool PrintObservers (std::ostream &os, Indent indent) const
 
virtual void SetTimeStamp (const TimeStamp &timeStamp)
 
 ~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 { 0 }
 
MeasureType m_CurrentValue { 0 }
 
ParametersType m_InitialPosition {}
 
MeasureType m_MaximumMetricValue { 0.0 }
 
ParametersType m_MaximumMetricValuePosition {}
 
MeasureType m_MinimumMetricValue { 0.0 }
 
ParametersType m_MinimumMetricValuePosition {}
 
StepsType m_NumberOfSteps { 0 }
 
double m_StepLength { 1.0 }
 
bool m_Stop { false }
 
- Protected Attributes inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
SizeValueType m_CurrentIteration {}
 
MeasureType m_CurrentMetricValue {}
 
bool m_DoEstimateScales {}
 
MetricTypePointer m_Metric {}
 
SizeValueType m_NumberOfIterations {}
 
ThreadIdType m_NumberOfWorkUnits {}
 
ScalesType m_Scales {}
 
bool m_ScalesAreIdentity {}
 
ScalesEstimatorType::Pointer m_ScalesEstimator {}
 
ScalesType m_Weights {}
 
bool m_WeightsAreIdentity {}
 
- Protected Attributes inherited from itk::LightObject
std::atomic< int > m_ReferenceCount {}
 

Private Attributes

std::ostringstream m_StopConditionDescription { "" }
 

Member Typedef Documentation

◆ ConstPointer

template<typename TInternalComputationValueType >
using itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ConstPointer = SmartPointer<const Self>

Definition at line 95 of file itkExhaustiveOptimizerv4.h.

◆ Pointer

template<typename TInternalComputationValueType >
using itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::Pointer = SmartPointer<Self>

Definition at line 94 of file itkExhaustiveOptimizerv4.h.

◆ Self

template<typename TInternalComputationValueType >
using itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::Self = ExhaustiveOptimizerv4

Standard "Self" type alias.

Definition at line 92 of file itkExhaustiveOptimizerv4.h.

◆ StepsType

template<typename TInternalComputationValueType >
using itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StepsType = Array<SizeValueType>

Steps type

Definition at line 104 of file itkExhaustiveOptimizerv4.h.

◆ Superclass

template<typename TInternalComputationValueType >
using itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::Superclass = ObjectToObjectOptimizerBaseTemplate<TInternalComputationValueType>

Definition at line 93 of file itkExhaustiveOptimizerv4.h.

Constructor & Destructor Documentation

◆ ExhaustiveOptimizerv4()

template<typename TInternalComputationValueType >
itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ExhaustiveOptimizerv4 ( )
protected

◆ ~ExhaustiveOptimizerv4()

template<typename TInternalComputationValueType >
itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::~ExhaustiveOptimizerv4 ( )
overrideprotecteddefault

Member Function Documentation

◆ AdvanceOneStep()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::AdvanceOneStep ( )
protected

Advance to the next grid position.

◆ GetCurrentIndex()

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

◆ GetCurrentValue()

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

◆ GetInitialPosition()

template<typename TInternalComputationValueType >
ParametersType& itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetInitialPosition ( )
inline

Get the position to initialize the optimization.

Definition at line 151 of file itkExhaustiveOptimizerv4.h.

◆ GetMaximumMetricValue()

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

◆ GetMaximumMetricValuePosition()

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

◆ GetMinimumMetricValue()

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

◆ GetMinimumMetricValuePosition()

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

◆ GetNameOfClass()

template<typename TInternalComputationValueType >
const char* itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetNameOfClass ( ) const
overridevirtual
See also
LightObject::GetNameOfClass()

Reimplemented from itk::Object.

◆ GetNumberOfSteps()

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

◆ GetStepLength()

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

◆ GetStopConditionDescription()

template<typename TInternalComputationValueType >
std::string itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::GetStopConditionDescription ( ) const
overridevirtual

Get the reason for termination

Implements itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

◆ IncrementIndex()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::IncrementIndex ( ParametersType &  newPosition)
protected

◆ New()

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

Method for creation through the object factory.

◆ PrintSelf()

template<typename TInternalComputationValueType >
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::Object.

◆ ResumeWalking()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::ResumeWalking ( )

Resume the optimization

◆ SetInitialPosition()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::SetInitialPosition ( const ParametersType &  param)

Set the position to initialize the optimization.

◆ SetNumberOfSteps()

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

◆ SetStepLength()

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

◆ StartOptimization()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StartOptimization ( bool  doOnlyInitialization = false)
overridevirtual

Run the optimization.

Parameters
doOnlyInitializationThis 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 >.

◆ StartWalking()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StartWalking ( )

Start optimization

◆ StopWalking()

template<typename TInternalComputationValueType >
void itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::StopWalking ( )

Stop optimization

Member Data Documentation

◆ m_CurrentIndex

template<typename TInternalComputationValueType >
ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_CurrentIndex { 0 }
protected

Definition at line 175 of file itkExhaustiveOptimizerv4.h.

◆ m_CurrentValue

template<typename TInternalComputationValueType >
MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_CurrentValue { 0 }
protected

Definition at line 171 of file itkExhaustiveOptimizerv4.h.

◆ m_InitialPosition

template<typename TInternalComputationValueType >
ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_InitialPosition {}
protected

Definition at line 170 of file itkExhaustiveOptimizerv4.h.

◆ m_MaximumMetricValue

template<typename TInternalComputationValueType >
MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MaximumMetricValue { 0.0 }
protected

Definition at line 176 of file itkExhaustiveOptimizerv4.h.

◆ m_MaximumMetricValuePosition

template<typename TInternalComputationValueType >
ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MaximumMetricValuePosition {}
protected

Definition at line 179 of file itkExhaustiveOptimizerv4.h.

◆ m_MinimumMetricValue

template<typename TInternalComputationValueType >
MeasureType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MinimumMetricValue { 0.0 }
protected

Definition at line 177 of file itkExhaustiveOptimizerv4.h.

◆ m_MinimumMetricValuePosition

template<typename TInternalComputationValueType >
ParametersType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_MinimumMetricValuePosition {}
protected

Definition at line 178 of file itkExhaustiveOptimizerv4.h.

◆ m_NumberOfSteps

template<typename TInternalComputationValueType >
StepsType itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_NumberOfSteps { 0 }
protected

Definition at line 172 of file itkExhaustiveOptimizerv4.h.

◆ m_StepLength

template<typename TInternalComputationValueType >
double itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_StepLength { 1.0 }
protected

Definition at line 174 of file itkExhaustiveOptimizerv4.h.

◆ m_Stop

template<typename TInternalComputationValueType >
bool itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_Stop { false }
protected

Definition at line 173 of file itkExhaustiveOptimizerv4.h.

◆ m_StopConditionDescription

template<typename TInternalComputationValueType >
std::ostringstream itk::ExhaustiveOptimizerv4< TInternalComputationValueType >::m_StopConditionDescription { "" }
private

Definition at line 182 of file itkExhaustiveOptimizerv4.h.

The documentation for this class was generated from the following file:
itk::GTest::TypedefsAndConstructors::Dimension2::IndexType
ImageBaseType::IndexType IndexType
Definition: itkGTestTypedefsAndConstructors.h:50
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