#include <itkCurvesLevelSetFunction.h>

Inheritance diagram for itk::CurvesLevelSetFunction< TImageType, TFeatureImageType >:

Collaboration diagram for itk::CurvesLevelSetFunction< TImageType, TFeatureImageType >:

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef TFeatureImageType	FeatureImageType
typedef Superclass::FeatureScalarType	FeatureScalarType
typedef SuperSuperclass::FloatOffsetType	FloatOffsetType
typedef SuperSuperclass::GlobalDataStruct	GlobalDataStruct
typedef Superclass::ImageType	ImageType
typedef Superclass::NeighborhoodType	NeighborhoodType
typedef SuperSuperclass::PixelType	PixelType
typedef SmartPointer< Self >	Pointer
typedef Superclass::RadiusType	RadiusType
typedef Superclass::ScalarValueType	ScalarValueType
typedef CurvesLevelSetFunction	Self
typedef SegmentationLevelSetFunction < TImageType >	Superclass
typedef LevelSetFunction < TImageType >	SuperSuperclass
typedef Superclass::VectorImageType	VectorImageType
Public Member Functions
virtual void	CalculateAdvectionImage ()
virtual void	CalculateSpeedImage ()
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
virtual ScalarValueType	CurvatureSpeed (const NeighborhoodType &neighborhood, const FloatOffsetType &offset, GlobalDataStruct *gd) const
virtual const char *	GetNameOfClass () const
virtual void	Initialize (const RadiusType &r)

void	SetDerivativeSigma (const double v)
double	GetDerivativeSigma ()
Static Public Member Functions
static Pointer	New ()
Static Public Attributes
static const unsigned int	ImageDimension = Superclass::ImageDimension
Protected Member Functions
	CurvesLevelSetFunction ()
	CurvesLevelSetFunction (const Self &)
void	operator= (const Self &)
void	PrintSelf (std::ostream &os, Indent indent) const
virtual	~CurvesLevelSetFunction ()
Private Attributes
OffsetValueType	m_Center
double	m_DerivativeSigma
OffsetValueType	m_xStride [ImageDimension]
std::slice	x_slice [ImageDimension]

Detailed Description

template<class TImageType, class TFeatureImageType = TImageType>
class itk::CurvesLevelSetFunction< TImageType, TFeatureImageType >

This function is used in CurvesLevelSetImageFilter to segment structures in images based on user supplied edge potential map.

CurvesLevelSetFunction is a subclass of the generic LevelSetFunction.: It is useful for segmentations based on a user supplied edge potential map which has values close to zero in regions near edges (or high image gradient) and values close to one in regions with relatively constant intensity. Typically, the edge potential map is a function of the gradient, for example:

$g(I) = 1 / ( 1 + | (\nabla * G)(I)| )$

$g(I) = \exp^{-|(\nabla * G)(I)|}$

where $ I $ is image intensity and $(\nabla * G)$ is the derivative of Gaussian operator.

In this function both the propagation term $(\nabla * G)$ #244: and the curvature spatial modifier term $ $Z(\mathbf{x})$ are taken directly from the edge potential image. The edge potential image is set via the SetFeatureImage() method. An advection term $A(\mathbf{x})$ is constructed from the negative gradient of the edge potential image. This term behaves like a doublet attracting the contour to the edges.

This implementation is based on:: L. Lorigo, O. Faugeras, W.E.L. Grimson, R. Keriven, R. Kikinis, A. Nabavi, and C.-F. Westin, Curves: Curve evolution for vessel segmentation. Medical Image Analysis, 5:195-206, 2001.

See also:: LevelSetFunction; SegmentationLevelSetImageFunction; GeodesicActiveContourLevelSetImageFilter

Definition at line 62 of file itkCurvesLevelSetFunction.h.