#include <itkCenteredTransformInitializer.h>

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

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

Detailed Description

template<class TTransform, class TFixedImage, class 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.

Definition at line 63 of file itkCenteredTransformInitializer.h.

Public Types
typedef SmartPointer< const Self >	ConstPointer

typedef FixedImageCalculatorType::Pointer	FixedImageCalculatorPointer

typedef ImageMomentsCalculator < FixedImageType >	FixedImageCalculatorType

typedef FixedImageType::ConstPointer	FixedImagePointer

typedef TFixedImage	FixedImageType

typedef TransformType::InputPointType	InputPointType

typedef MovingImageCalculatorType::Pointer	MovingImageCalculatorPointer

typedef ImageMomentsCalculator < MovingImageType >	MovingImageCalculatorType

typedef MovingImageType::ConstPointer	MovingImagePointer

typedef TMovingImage	MovingImageType

typedef TransformType::OffsetType	OffsetType

typedef TransformType::OutputVectorType	OutputVectorType

typedef SmartPointer< Self >	Pointer

typedef CenteredTransformInitializer	Self

typedef Object	Superclass

typedef TransformType::Pointer	TransformPointer

typedef TTransform	TransformType

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 (void) const

virtual const char *	GetNameOfClass () const

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 const FixedImageCalculatorType *	GetFixedCalculator () const

virtual MovingImageCalculatorType *	GetModifiableMovingCalculator ()

virtual const MovingImageCalculatorType *	GetMovingCalculator () const

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 (void)

const MetaDataDictionary &	GetMetaDataDictionary (void) 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

void	RemoveAllObservers ()

void	RemoveObserver (unsigned long tag)

void	SetDebug (bool debugFlag) const

void	SetMetaDataDictionary (const MetaDataDictionary &rhs)

virtual void	SetReferenceCount (int)

virtual void	UnRegister () 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 ()

Static Public Attributes

static const unsigned int	InputSpaceDimension = TransformType::InputSpaceDimension

static const unsigned int	OutputSpaceDimension = TransformType::OutputSpaceDimension

Protected Member Functions
	CenteredTransformInitializer ()

virtual TransformType *	GetModifiableTransform ()

virtual const TransformType *	GetTransform () const

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

	~CenteredTransformInitializer ()

Protected Member Functions inherited from itk::Object
	Object ()

bool	PrintObservers (std::ostream &os, Indent indent) const

virtual void	SetTimeStamp (const TimeStamp &time)

virtual	~Object ()

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 Member Functions
	CenteredTransformInitializer (const Self &)

void	operator= (const Self &)

Private Attributes
FixedImageCalculatorPointer	m_FixedCalculator

FixedImagePointer	m_FixedImage

MovingImageCalculatorPointer	m_MovingCalculator

MovingImagePointer	m_MovingImage

TransformPointer	m_Transform

bool	m_UseMoments

Additional Inherited Members
Protected Types inherited from itk::LightObject
typedef int	InternalReferenceCountType

Protected Attributes inherited from itk::LightObject
InternalReferenceCountType	m_ReferenceCount

SimpleFastMutexLock	m_ReferenceCountLock