#include <itkFEMFiniteDifferenceFunctionLoad.h>

Inheritance diagram for itk::fem::FiniteDifferenceFunctionLoad< TMoving, TFixed >:

Collaboration diagram for itk::fem::FiniteDifferenceFunctionLoad< TMoving, TFixed >:

Public Types
typedef Float	ComputationType
typedef SmartPointer< const Self >	ConstPointer
typedef DemonsRegistrationFunction < FixedImageType, MovingImageType, DisplacementFieldType >	DemonsRegistrationFunctionType
typedef Image< VectorType, itkGetStaticConstMacro(ImageDimension)>	DisplacementFieldType
typedef DisplacementFieldType::Pointer	DisplacementFieldTypePointer
typedef VectorContainer < ElementIdentifier, Element::Pointer >	ElementContainerType
typedef unsigned long	ElementIdentifier
typedef vnl_vector< Float >	FEMVectorType
typedef NeighborhoodIterator < DisplacementFieldType >	FieldIteratorType
typedef PDEDeformableRegistrationFunction < FixedImageType, MovingImageType, DisplacementFieldType >	FiniteDifferenceFunctionType
typedef FiniteDifferenceFunctionType::Pointer	FiniteDifferenceFunctionTypePointer
typedef FixedImageType::ConstPointer	FixedConstPointer
typedef TFixed	FixedImageType
typedef FixedNeighborhoodIteratorType::IndexType	FixedNeighborhoodIndexType
typedef NeighborhoodIterator < FixedImageType >	FixedNeighborhoodIteratorType
typedef FixedImageType::PixelType	FixedPixelType
typedef FixedImageType *	FixedPointer
typedef FixedNeighborhoodIteratorType::RadiusType	FixedRadiusType
typedef ImageRegionIteratorWithIndex < FixedImageType >	FixedRegionIteratorType
typedef LoadElement::Float	Float
typedef Image< PixelType, itkGetStaticConstMacro(ImageDimension)>	ImageType
typedef MeanSquareRegistrationFunction < FixedImageType, MovingImageType, DisplacementFieldType >	MeanSquareRegistrationFunctionType
typedef MIRegistrationFunction < FixedImageType, MovingImageType, DisplacementFieldType >	MIRegistrationFunctionType
typedef MovingImageType::ConstPointer	MovingConstPointer
typedef TMoving	MovingImageType
typedef MovingNeighborhoodIteratorType::IndexType	MovingNeighborhoodIndexType
typedef NeighborhoodIterator < MovingImageType >	MovingNeighborhoodIteratorType
typedef MovingImageType::PixelType	MovingPixelType
typedef MovingImageType *	MovingPointer
typedef MovingNeighborhoodIteratorType::RadiusType	MovingRadiusType
typedef ImageRegionIteratorWithIndex < MovingImageType >	MovingRegionIteratorType
typedef NCCRegistrationFunction < FixedImageType, MovingImageType, DisplacementFieldType >	NCCRegistrationFunctionType
typedef Float	PixelType
typedef SmartPointer< Self >	Pointer
typedef MovingNeighborhoodIteratorType::RadiusType	RadiusType
typedef FiniteDifferenceFunctionLoad	Self
typedef LoadElement	Superclass
typedef FiniteDifferenceFunctionType::TimeStepType	TimeStepType
typedef itk::Vector< float, itkGetStaticConstMacro(ImageDimension)>	VectorType
Public Types inherited from itk::fem::LoadElement
typedef std::vector< const Element * >	ElementPointersVectorType
Public Types inherited from itk::fem::Load
typedef FEMPArray< Self >	ArrayType
Public Types inherited from itk::fem::FEMLightObject
typedef Self	Baseclass
Public Types inherited from itk::LightObject

Public Member Functions
virtual void	ApplyLoad (Element::ConstPointer element, Element::VectorType &Fe)
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
Float	EvaluateMetricGivenSolution (ElementContainerType *el, Float step=1.0)
FEMVectorType	Fe (FEMVectorType)
double	GetCurrentEnergy ()
DisplacementFieldTypePointer	GetDisplacementField ()
FixedPointer	GetFixedImage ()
MovingRadiusType	GetMetricRadius ()
MovingPointer	GetMovingImage ()
virtual const char *	GetNameOfClass () const
unsigned int	GetNumberOfIntegrationPoints ()
Solution::ConstPointer	GetSolution ()
Float	GetSolution (unsigned int i, unsigned int which=0)
void	InitializeIteration ()
void	InitializeMetric ()
void	PrintCurrentEnergy ()
void	SetCurrentEnergy (double e=0.0)
void	SetDescentDirectionMaximize ()
void	SetDescentDirectionMinimize ()
void	SetDifferenceFunction (FiniteDifferenceFunctionTypePointer drfp)
void	SetDisplacementField (DisplacementFieldTypePointer df)
void	SetGamma (Float s)
void	SetMetric (FiniteDifferenceFunctionTypePointer drfp)
void	SetMetricRadius (MovingRadiusType T)
void	SetNumberOfIntegrationPoints (unsigned int i)
void	SetSolution (Solution::ConstPointer ptr)

void	SetMovingImage (MovingImageType *R)

void	SetFixedImage (FixedImageType *T)
Public Member Functions inherited from itk::fem::LoadElement
void	AddNextElement (Element::ConstPointer e)
void	AddNextElement (Element::Pointer e)
Element::ConstPointer	GetElement (int i)
ElementPointersVectorType &	GetElementArray ()
const ElementPointersVectorType &	GetElementArray () const
unsigned int	GetNumberOfElements (void)
	LoadElement ()
Public Member Functions inherited from itk::fem::Load
const Element *	GetElement () const
void	SetElement (const Element *el)
Public Member Functions inherited from itk::fem::FEMLightObject
int	GetGlobalNumber () const
void	SetGlobalNumber (int)
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
virtual void	Register () const
virtual void	SetReferenceCount (int)
virtual void	UnRegister () const

Static Public Member Functions
static Pointer	New ()

Static Public Attributes
static const unsigned int	ImageDimension = MovingImageType::ImageDimension

Private Member Functions
	FiniteDifferenceFunctionLoad ()

Private Attributes
FiniteDifferenceFunctionTypePointer	m_DifferenceFunction
DisplacementFieldType::Pointer	m_DisplacementField
FixedPointer	m_FixedImage
FixedImageType::SizeType	m_FixedSize
Float	m_Gamma
float	m_GradSigma
MovingPointer	m_MovingImage
MovingImageType::SizeType	m_MovingSize
unsigned int	m_NumberOfIntegrationPoints
float	m_Sign
Solution::ConstPointer	m_Solution
unsigned int	m_SolutionIndex
unsigned int	m_SolutionIndex2
float	m_WhichMetric

Additional Inherited Members
Protected Member Functions inherited from itk::fem::LoadElement
void	AddNextElementInternal (const Element *e)
virtual void	PrintSelf (std::ostream &os, Indent indent) const

Detailed Description

template<class TMoving, class TFixed>
class itk::fem::FiniteDifferenceFunctionLoad< TMoving, TFixed >

General image pair load that uses the itkFiniteDifferenceFunctions.

This load computes FEM gravity loads by using derivatives provided by itkFiniteDifferenceFunctions (e.g. mean squares intensity difference.) The function responsible for this is called Fg, as required by the FEMLoad standards. It takes a vnl_vector as input. We assume the vector input is of size 2*ImageDimension. The 0 to ImageDimension-1 elements contain the position, p, in the reference (moving) image. The next ImageDimension to 2*ImageDimension-1 elements contain the value of the vector field at that point, v(p). The metrics return both a scalar similarity value and vector-valued derivative. The derivative is what gives us the force to drive the FEM registration. These values are computed with respect to some region in the Fixed image. This region size may be set by the user by calling SetMetricRadius. As the metric derivative computation evolves, performance should improve and more functionality will be available (such as scale selection).

Definition at line 67 of file itkFEMFiniteDifferenceFunctionLoad.h.