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itk::PowellOptimizerv4< TInternalComputationValueType > Class Template Reference
Group Numerics » Module ITKOptimizersv4

#include <itkPowellOptimizerv4.h>

Detailed Description

template<typename TInternalComputationValueType>
class itk::PowellOptimizerv4< TInternalComputationValueType >

Implements Powell optimization using Brent line search.

The code in this class was adapted from the Wikipedia and the netlib.org zeroin function.

https://www.netlib.org/go/zeroin.f https://en.wikipedia.org/wiki/Brent_method https://en.wikipedia.org/wiki/Golden_section_search

This optimizer needs a cost function. Partial derivatives of that function are not required.

For an N-dimensional parameter space, each iteration minimizes the function in N (initially orthogonal) directions. Typically only 2-5 iterations are required. If gradients are available, consider a conjugate gradient line search strategy.

The SetStepLength determines the initial distance to step in a line direction when bounding the minimum (using bracketing triple spaced using a golden search strategy).

The StepTolerance terminates optimization when the parameter values are known to be within this (scaled) distance of the local extreme.

The ValueTolerance terminates optimization when the cost function values at the current parameters and at the local extreme are likely (within a second order approximation) to be within this is tolerance.

Definition at line 60 of file itkPowellOptimizerv4.h.

+ Inheritance diagram for itk::PowellOptimizerv4< TInternalComputationValueType >:
+ Collaboration diagram for itk::PowellOptimizerv4< TInternalComputationValueType >:

Public Types

using ConstPointer = SmartPointer< const Self >
 
using Pointer = SmartPointer< Self >
 
using Self = PowellOptimizerv4
 
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 void CatchGetValueExceptionOn ()
 
virtual const bool & GetCatchGetValueException () const
 
virtual const unsigned int & GetCurrentLineIteration () const
 
virtual const double & GetMetricWorstPossibleValue () const
 
const char * GetNameOfClass () const override
 
std::string GetStopConditionDescription () const override
 
virtual void SetCatchGetValueException (bool _arg)
 
virtual void SetMetricWorstPossibleValue (double _arg)
 
void StartOptimization (bool doOnlyInitialization=false) override
 
void StopOptimization ()
 
virtual void SetMaximumIteration (unsigned int _arg)
 
virtual const unsigned int & GetMaximumIteration () const
 
virtual void SetMaximumLineIteration (unsigned int _arg)
 
virtual unsigned int GetMaximumLineIteration () const
 
virtual void SetStepLength (double _arg)
 
virtual const double & GetStepLength () const
 
virtual void SetStepTolerance (double _arg)
 
virtual const double & GetStepTolerance () const
 
virtual void SetValueTolerance (double _arg)
 
virtual const double & GetValueTolerance () const
 
virtual const MeasureType & GetCurrentCost () const
 
const MeasureType & GetValue () const override
 
- 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
 
virtual SizeValueType GetNumberOfIterations () const
 
virtual const ThreadIdType & GetNumberOfWorkUnits () const
 
virtual const ScalesType & GetScales () const
 
virtual const bool & GetScalesAreIdentity () const
 
bool GetScalesInitialized () 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

virtual void BracketedLineOptimize (double ax, double bx, double cx, double fa, double functionValueOfb, double fc, double *extX, double *extVal)
 
virtual void BracketedLineOptimize (double ax, double bx, double cx, double fa, double functionValueOfb, double fc, double *extX, double *extVal, ParametersType &tempCoord)
 
double GetLineValue (double x) const
 
double GetLineValue (double x, ParametersType &tempCoord) const
 
virtual unsigned int GetSpaceDimension ()
 
virtual bool GetStop ()
 
virtual void LineBracket (double *x1, double *x2, double *x3, double *f1, double *f2, double *f3)
 
virtual void LineBracket (double *x1, double *x2, double *x3, double *f1, double *f2, double *f3, ParametersType &tempCoord)
 
 PowellOptimizerv4 ()
 
 PowellOptimizerv4 (const PowellOptimizerv4 &)
 
void PrintSelf (std::ostream &os, Indent indent) const override
 
virtual void SetCurrentCost (double _arg)
 
virtual void SetCurrentIteration (unsigned int _arg)
 
void SetCurrentLinePoint (double x, double fx)
 
void SetLine (const ParametersType &origin, const vnl_vector< double > &direction)
 
void SetSpaceDimension (unsigned int dim)
 
virtual void SetStop (bool _arg)
 
void Shift (double *a, double *b, double *c, double d) const
 
void Swap (double *a, double *b) const
 
 ~PowellOptimizerv4 () override=default
 
- Protected Member Functions inherited from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >
 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 ()
 

Private Attributes

bool m_CatchGetValueException { false }
 
MeasureType m_CurrentCost {}
 
unsigned int m_CurrentLineIteration { 0 }
 
ParametersType m_CurrentPosition {}
 
vnl_vector< double > m_LineDirection {}
 
ParametersType m_LineOrigin {}
 
unsigned int m_MaximumIteration { 100 }
 
unsigned int m_MaximumLineIteration { 100 }
 
double m_MetricWorstPossibleValue { 0 }
 
unsigned int m_SpaceDimension { 0 }
 
double m_StepLength { 0 }
 
double m_StepTolerance { 0 }
 
bool m_Stop { false }
 
std::ostringstream m_StopConditionDescription {}
 
double m_ValueTolerance { 0 }
 

Additional Inherited Members

- 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 {}
 

Member Typedef Documentation

◆ ConstPointer

template<typename TInternalComputationValueType >
using itk::PowellOptimizerv4< TInternalComputationValueType >::ConstPointer = SmartPointer<const Self>

Definition at line 68 of file itkPowellOptimizerv4.h.

◆ Pointer

template<typename TInternalComputationValueType >
using itk::PowellOptimizerv4< TInternalComputationValueType >::Pointer = SmartPointer<Self>

Definition at line 67 of file itkPowellOptimizerv4.h.

◆ Self

template<typename TInternalComputationValueType >
using itk::PowellOptimizerv4< TInternalComputationValueType >::Self = PowellOptimizerv4

Standard "Self" type alias.

Definition at line 65 of file itkPowellOptimizerv4.h.

◆ Superclass

template<typename TInternalComputationValueType >
using itk::PowellOptimizerv4< TInternalComputationValueType >::Superclass = ObjectToObjectOptimizerBaseTemplate<TInternalComputationValueType>

Definition at line 66 of file itkPowellOptimizerv4.h.

Constructor & Destructor Documentation

◆ PowellOptimizerv4() [1/2]

template<typename TInternalComputationValueType >
itk::PowellOptimizerv4< TInternalComputationValueType >::PowellOptimizerv4 ( )
protected

◆ PowellOptimizerv4() [2/2]

template<typename TInternalComputationValueType >
itk::PowellOptimizerv4< TInternalComputationValueType >::PowellOptimizerv4 ( const PowellOptimizerv4< TInternalComputationValueType > &  )
protected

◆ ~PowellOptimizerv4()

template<typename TInternalComputationValueType >
itk::PowellOptimizerv4< TInternalComputationValueType >::~PowellOptimizerv4 ( )
overrideprotecteddefault

Member Function Documentation

◆ BracketedLineOptimize() [1/2]

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::BracketedLineOptimize ( double  ax,
double  bx,
double  cx,
double  fa,
double  functionValueOfb,
double  fc,
double *  extX,
double *  extVal 
)
protectedvirtual

Given a bracketing triple of points and their function values, returns a bounded extreme. These values are in parameter space, along the current line and wrt the current origin set via SetLine. Optimization terminates based on MaximumIteration, StepTolerance, or ValueTolerance. Implemented as Brent line optimizers from NRC.

◆ BracketedLineOptimize() [2/2]

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::BracketedLineOptimize ( double  ax,
double  bx,
double  cx,
double  fa,
double  functionValueOfb,
double  fc,
double *  extX,
double *  extVal,
ParametersType &  tempCoord 
)
protectedvirtual

◆ CatchGetValueExceptionOn()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::CatchGetValueExceptionOn ( )
virtual

◆ GetCatchGetValueException()

template<typename TInternalComputationValueType >
virtual const bool& itk::PowellOptimizerv4< TInternalComputationValueType >::GetCatchGetValueException ( ) const
virtual

◆ GetCurrentCost()

template<typename TInternalComputationValueType >
virtual const MeasureType& itk::PowellOptimizerv4< TInternalComputationValueType >::GetCurrentCost ( ) const
virtual

Return Current Value

◆ GetCurrentLineIteration()

template<typename TInternalComputationValueType >
virtual const unsigned int& itk::PowellOptimizerv4< TInternalComputationValueType >::GetCurrentLineIteration ( ) const
virtual

Get the current line search iteration

◆ GetLineValue() [1/2]

template<typename TInternalComputationValueType >
double itk::PowellOptimizerv4< TInternalComputationValueType >::GetLineValue ( double  x) const
protected

Get the value of the n-dimensional cost function at this scalar step distance along the current line direction from the current line origin. Line origin and distances are set via SetLine

◆ GetLineValue() [2/2]

template<typename TInternalComputationValueType >
double itk::PowellOptimizerv4< TInternalComputationValueType >::GetLineValue ( double  x,
ParametersType &  tempCoord 
) const
protected

◆ GetMaximumIteration()

template<typename TInternalComputationValueType >
virtual const unsigned int& itk::PowellOptimizerv4< TInternalComputationValueType >::GetMaximumIteration ( ) const
virtual

Set/Get maximum iteration limit.

◆ GetMaximumLineIteration()

template<typename TInternalComputationValueType >
virtual unsigned int itk::PowellOptimizerv4< TInternalComputationValueType >::GetMaximumLineIteration ( ) const
virtual

Set/Get the maximum number of line search iterations

◆ GetMetricWorstPossibleValue()

template<typename TInternalComputationValueType >
virtual const double& itk::PowellOptimizerv4< TInternalComputationValueType >::GetMetricWorstPossibleValue ( ) const
virtual

◆ GetNameOfClass()

template<typename TInternalComputationValueType >
const char* itk::PowellOptimizerv4< TInternalComputationValueType >::GetNameOfClass ( ) const
overridevirtual
See also
LightObject::GetNameOfClass()

Reimplemented from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

◆ GetSpaceDimension()

template<typename TInternalComputationValueType >
virtual unsigned int itk::PowellOptimizerv4< TInternalComputationValueType >::GetSpaceDimension ( )
protectedvirtual

◆ GetStepLength()

template<typename TInternalComputationValueType >
virtual const double& itk::PowellOptimizerv4< TInternalComputationValueType >::GetStepLength ( ) const
virtual

Set/Get StepLength for the (scaled) spacing of the sampling of parameter space while bracketing the extremum

◆ GetStepTolerance()

template<typename TInternalComputationValueType >
virtual const double& itk::PowellOptimizerv4< TInternalComputationValueType >::GetStepTolerance ( ) const
virtual

Set/Get StepTolerance. Once the local extreme is known to be within this distance of the current parameter values, optimization terminates

◆ GetStop()

template<typename TInternalComputationValueType >
virtual bool itk::PowellOptimizerv4< TInternalComputationValueType >::GetStop ( )
protectedvirtual

◆ GetStopConditionDescription()

template<typename TInternalComputationValueType >
std::string itk::PowellOptimizerv4< TInternalComputationValueType >::GetStopConditionDescription ( ) const
overridevirtual

Stop condition return string type

Implements itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

◆ GetValue()

template<typename TInternalComputationValueType >
const MeasureType& itk::PowellOptimizerv4< TInternalComputationValueType >::GetValue ( ) const
inlineoverridevirtual

Return Current Value

Reimplemented from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

Definition at line 112 of file itkPowellOptimizerv4.h.

◆ GetValueTolerance()

template<typename TInternalComputationValueType >
virtual const double& itk::PowellOptimizerv4< TInternalComputationValueType >::GetValueTolerance ( ) const
virtual

Set/Get ValueTolerance. Once this current cost function value is known to be within this tolerance of the cost function value at the local extreme, optimization terminates

◆ LineBracket() [1/2]

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::LineBracket ( double *  x1,
double *  x2,
double *  x3,
double *  f1,
double *  f2,
double *  f3 
)
protectedvirtual

The LineBracket routine from NRC. Later reimplemented from the description of the method available in the Wikipedia.

Uses current origin and line direction (from SetLine) to find a triple of points (ax, bx, cx) that bracket the extreme "near" the origin. Search first considers the point StepLength distance from ax.

IMPORTANT: The value of ax and the value of the function at ax (i.e., fa), must both be provided to this function.

◆ LineBracket() [2/2]

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::LineBracket ( double *  x1,
double *  x2,
double *  x3,
double *  f1,
double *  f2,
double *  f3,
ParametersType &  tempCoord 
)
protectedvirtual

◆ New()

template<typename TInternalComputationValueType >
static Pointer itk::PowellOptimizerv4< TInternalComputationValueType >::New ( )
static

Method for creation through the object factory.

◆ PrintSelf()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< 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 >.

◆ SetCatchGetValueException()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetCatchGetValueException ( bool  _arg)
virtual

◆ SetCurrentCost()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetCurrentCost ( double  _arg)
protectedvirtual

◆ SetCurrentIteration()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetCurrentIteration ( unsigned int  _arg)
protectedvirtual

◆ SetCurrentLinePoint()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::SetCurrentLinePoint ( double  x,
double  fx 
)
protected

Set the given scalar step distance (x) and function value (fx) as the "best-so-far" optimizer values.

◆ SetLine()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::SetLine ( const ParametersType &  origin,
const vnl_vector< double > &  direction 
)
protected

Used to specify the line direction through the n-dimensional parameter space the is currently being bracketed and optimized.

◆ SetMaximumIteration()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetMaximumIteration ( unsigned int  _arg)
virtual

Set/Get maximum iteration limit.

◆ SetMaximumLineIteration()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetMaximumLineIteration ( unsigned int  _arg)
virtual

Set/Get the maximum number of line search iterations

◆ SetMetricWorstPossibleValue()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetMetricWorstPossibleValue ( double  _arg)
virtual

◆ SetSpaceDimension()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::SetSpaceDimension ( unsigned int  dim)
inlineprotected

Definition at line 225 of file itkPowellOptimizerv4.h.

◆ SetStepLength()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetStepLength ( double  _arg)
virtual

Set/Get StepLength for the (scaled) spacing of the sampling of parameter space while bracketing the extremum

◆ SetStepTolerance()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetStepTolerance ( double  _arg)
virtual

Set/Get StepTolerance. Once the local extreme is known to be within this distance of the current parameter values, optimization terminates

◆ SetStop()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetStop ( bool  _arg)
protectedvirtual

◆ SetValueTolerance()

template<typename TInternalComputationValueType >
virtual void itk::PowellOptimizerv4< TInternalComputationValueType >::SetValueTolerance ( double  _arg)
virtual

Set/Get ValueTolerance. Once this current cost function value is known to be within this tolerance of the cost function value at the local extreme, optimization terminates

◆ Shift()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::Shift ( double *  a,
double *  b,
double *  c,
double  d 
) const
protected

Used in bracketing the extreme along the current line. Adapted from NRC

◆ StartOptimization()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::StartOptimization ( bool  doOnlyInitialization = false)
overridevirtual

Start optimization.

Reimplemented from itk::ObjectToObjectOptimizerBaseTemplate< TInternalComputationValueType >.

◆ StopOptimization()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::StopOptimization ( )
inline

When users call StartOptimization, this value will be set false. By calling StopOptimization, this flag will be set true, and optimization will stop at the next iteration.

Definition at line 129 of file itkPowellOptimizerv4.h.

◆ Swap()

template<typename TInternalComputationValueType >
void itk::PowellOptimizerv4< TInternalComputationValueType >::Swap ( double *  a,
double *  b 
) const
protected

Used in bracketing the extreme along the current line. Adapted from NRC

Member Data Documentation

◆ m_CatchGetValueException

template<typename TInternalComputationValueType >
bool itk::PowellOptimizerv4< TInternalComputationValueType >::m_CatchGetValueException { false }
private

Definition at line 249 of file itkPowellOptimizerv4.h.

◆ m_CurrentCost

template<typename TInternalComputationValueType >
MeasureType itk::PowellOptimizerv4< TInternalComputationValueType >::m_CurrentCost {}
private

Internal storage for the value type / used as a cache

Definition at line 262 of file itkPowellOptimizerv4.h.

◆ m_CurrentLineIteration

template<typename TInternalComputationValueType >
unsigned int itk::PowellOptimizerv4< TInternalComputationValueType >::m_CurrentLineIteration { 0 }
private

Current iteration

Definition at line 243 of file itkPowellOptimizerv4.h.

◆ m_CurrentPosition

template<typename TInternalComputationValueType >
ParametersType itk::PowellOptimizerv4< TInternalComputationValueType >::m_CurrentPosition {}
private

Definition at line 270 of file itkPowellOptimizerv4.h.

◆ m_LineDirection

template<typename TInternalComputationValueType >
vnl_vector<double> itk::PowellOptimizerv4< TInternalComputationValueType >::m_LineDirection {}
private

Definition at line 257 of file itkPowellOptimizerv4.h.

◆ m_LineOrigin

template<typename TInternalComputationValueType >
ParametersType itk::PowellOptimizerv4< TInternalComputationValueType >::m_LineOrigin {}
private

Definition at line 256 of file itkPowellOptimizerv4.h.

◆ m_MaximumIteration

template<typename TInternalComputationValueType >
unsigned int itk::PowellOptimizerv4< TInternalComputationValueType >::m_MaximumIteration { 100 }
private

Maximum iteration limit.

Definition at line 246 of file itkPowellOptimizerv4.h.

◆ m_MaximumLineIteration

template<typename TInternalComputationValueType >
unsigned int itk::PowellOptimizerv4< TInternalComputationValueType >::m_MaximumLineIteration { 100 }
private

Definition at line 247 of file itkPowellOptimizerv4.h.

◆ m_MetricWorstPossibleValue

template<typename TInternalComputationValueType >
double itk::PowellOptimizerv4< TInternalComputationValueType >::m_MetricWorstPossibleValue { 0 }
private

Definition at line 250 of file itkPowellOptimizerv4.h.

◆ m_SpaceDimension

template<typename TInternalComputationValueType >
unsigned int itk::PowellOptimizerv4< TInternalComputationValueType >::m_SpaceDimension { 0 }
private

Definition at line 240 of file itkPowellOptimizerv4.h.

◆ m_StepLength

template<typename TInternalComputationValueType >
double itk::PowellOptimizerv4< TInternalComputationValueType >::m_StepLength { 0 }
private

The minimal size of search

Definition at line 253 of file itkPowellOptimizerv4.h.

◆ m_StepTolerance

template<typename TInternalComputationValueType >
double itk::PowellOptimizerv4< TInternalComputationValueType >::m_StepTolerance { 0 }
private

Definition at line 254 of file itkPowellOptimizerv4.h.

◆ m_Stop

template<typename TInternalComputationValueType >
bool itk::PowellOptimizerv4< TInternalComputationValueType >::m_Stop { false }
private

this is user-settable flag to stop optimization. when users call StartOptimization, this value will be set false. By calling StopOptimization, this flag will be set true, and optimization will stop at the next iteration.

Definition at line 268 of file itkPowellOptimizerv4.h.

◆ m_StopConditionDescription

template<typename TInternalComputationValueType >
std::ostringstream itk::PowellOptimizerv4< TInternalComputationValueType >::m_StopConditionDescription {}
private

Definition at line 272 of file itkPowellOptimizerv4.h.

◆ m_ValueTolerance

template<typename TInternalComputationValueType >
double itk::PowellOptimizerv4< TInternalComputationValueType >::m_ValueTolerance { 0 }
private

Definition at line 259 of file itkPowellOptimizerv4.h.

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