#include <itkCenteredTransformInitializer.h>

Detailed Description

template<typename TTransform, typename TFixedImage, typename TMovingImage>
class itk::CenteredTransformInitializer< TTransform, TFixedImage, TMovingImage >

CenteredTransformInitializer is a helper class intended to initialize the center of rotation and the translation of Transforms having the center of rotation among their parameters.

This class is connected to the fixed image, moving image and transform involved in the registration. Two modes of operation are possible:

Geometrical,
Center of mass

In the first mode, the geometrical center of the moving image is passed as initial center of rotation to the transform and the vector from the center of the fixed image to the center of the moving image is passed as the initial translation. This mode basically assumes that the anatomical objects to be registered are centered in their respective images. Hence the best initial guess for the registration is the one that superimposes those two centers.

In the second mode, the moments of gray level values are computed for both images. The center of mass of the moving image is then used as center of rotation. The vector between the two centers of mass is passes as the initial translation to the transform. This second approach assumes that the moments of the anatomical objects are similar for both images and hence the best initial guess for registration is to superimpose both mass centers. Note that this assumption will probably not hold in multi-modality registration.

Examples: Examples/RegistrationITKv4/DeformableRegistration15.cxx, Examples/RegistrationITKv4/ImageRegistration12.cxx, Examples/RegistrationITKv4/ImageRegistration13.cxx, Examples/RegistrationITKv4/ImageRegistration14.cxx, Examples/RegistrationITKv4/ImageRegistration19.cxx, Examples/RegistrationITKv4/ImageRegistration20.cxx, Examples/RegistrationITKv4/ImageRegistration6.cxx, Examples/RegistrationITKv4/ImageRegistration7.cxx, Examples/RegistrationITKv4/ImageRegistration8.cxx, Examples/RegistrationITKv4/ImageRegistration9.cxx, Examples/RegistrationITKv4/MultiResImageRegistration2.cxx, SphinxExamples/src/Numerics/Optimizers/ExhaustiveOptimizer/Code.cxx, and SphinxExamples/src/Registration/Common/WatchRegistration/Code.cxx.

Definition at line 61 of file itkCenteredTransformInitializer.h.

Inheritance diagram for itk::CenteredTransformInitializer< TTransform, TFixedImage, TMovingImage >:

Collaboration diagram for itk::CenteredTransformInitializer< TTransform, TFixedImage, TMovingImage >:

Public Types
using	ConstPointer = SmartPointer< const Self >

using	FixedImageCalculatorPointer = typename FixedImageCalculatorType::Pointer

using	FixedImageCalculatorType = ImageMomentsCalculator< FixedImageType >

using	FixedImagePointer = typename FixedImageType::ConstPointer

using	FixedImageType = TFixedImage

using	InputPointType = typename TransformType::InputPointType

using	MovingImageCalculatorPointer = typename MovingImageCalculatorType::Pointer

using	MovingImageCalculatorType = ImageMomentsCalculator< MovingImageType >

using	MovingImagePointer = typename MovingImageType::ConstPointer

using	MovingImageType = TMovingImage

using	OffsetType = typename TransformType::OffsetType

using	OutputVectorType = typename TransformType::OutputVectorType

using	Pointer = SmartPointer< Self >

using	Self = CenteredTransformInitializer

using	Superclass = Object

using	TransformPointer = typename TransformType::Pointer

using	TransformType = TTransform

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
const char *	GetNameOfClass () const override

virtual void	InitializeTransform ()

virtual void	SetFixedImage (const FixedImageType *_arg)

virtual void	SetMovingImage (const MovingImageType *_arg)

virtual void	SetTransform (TransformType *_arg)


void	GeometryOn ()

void	MomentsOn ()


virtual FixedImageCalculatorType *	GetModifiableFixedCalculator ()

virtual MovingImageCalculatorType *	GetModifiableMovingCalculator ()

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 ()

Static Public Attributes
static constexpr unsigned int	InputSpaceDimension = TransformType::InputSpaceDimension

static constexpr unsigned int	OutputSpaceDimension = TransformType::OutputSpaceDimension

Protected Member Functions
	CenteredTransformInitializer ()=default

virtual TransformType *	GetModifiableTransform ()

void	PrintSelf (std::ostream &os, Indent indent) const override

	~CenteredTransformInitializer () override=default

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
const FixedImageCalculatorPointer	m_FixedCalculator { FixedImageCalculatorType::New() }

FixedImagePointer	m_FixedImage {}

const MovingImageCalculatorPointer	m_MovingCalculator { MovingImageCalculatorType::New() }

MovingImagePointer	m_MovingImage {}

TransformPointer	m_Transform {}

bool	m_UseMoments { false }

Additional Inherited Members
Protected Attributes inherited from itk::LightObject
std::atomic< int >	m_ReferenceCount {}