Three-dimensional deformable model for image segmentation. More...

#include <itkDeformableSimplexMesh3DFilter.h>

Inheritance diagram for itk::DeformableSimplexMesh3DFilter< TInputMesh, TOutputMesh >:

Collaboration diagram for itk::DeformableSimplexMesh3DFilter< TInputMesh, TOutputMesh >:

Public Types
typedef Image< unsigned char, 3 >	BinaryOutput
typedef InputMeshType::CellsContainer::Iterator	CellsContainerIterator
typedef InputMeshType::CellsContainerPointer	CellsContainerPointer
typedef SmartPointer< const Self >	ConstPointer
typedef CovariantVector < typename VectorType::ValueType, 3 >	CovariantVectorType
typedef GeometryMapType::Iterator	GeometryMapIterator
typedef GeometryMapType::Pointer	GeometryMapPointer
typedef InputMeshType::GeometryMapType	GeometryMapType
typedef GradientImageType::Pointer	GradientImagePointer
typedef GradientImageType::SizeType	GradientImageSizeType
typedef Image< GradientType, 3 >	GradientImageType
typedef GradientImageType::IndexType	GradientIndexType
typedef GradientIndexType::IndexValueType	GradientIndexValueType
typedef GradientImageType::PixelType	GradientPixelType
typedef CovariantVector < PixelType, 3 >	GradientType
typedef IndexSetType::iterator	IndexSetIterator
typedef std::set< IdentifierType >	IndexSetType
typedef InputMeshType::Pointer	InputMeshPointer
typedef TInputMesh	InputMeshType
typedef InputMeshType::NeighborListType	InputNeighbors
typedef InputMeshType::NeighborListType::iterator	InputNeighborsIterator
typedef InputMeshType::PointsContainer	InputPointsContainer
typedef InputMeshType::PointsContainer::ConstIterator	InputPointsContainerConstIterator
typedef InputMeshType::PointsContainerPointer	InputPointsContainerPointer
typedef Image< float, 3 >	MagnitudeOutput
typedef InputMeshType::PointType	MeshPointType
typedef NeighborSetType::iterator	NeighborSetIterator
typedef std::set< IdentifierType >	NeighborSetType
typedef OutputMeshType::Pointer	OutputMeshPointer
typedef TOutputMesh	OutputMeshType
typedef InputMeshType::PixelType	PixelType
typedef SmartPointer< Self >	Pointer
typedef SimplexMeshGeometry::PointType	PointType
typedef DeformableSimplexMesh3DFilter	Self
typedef MeshToMeshFilter < TInputMesh, TOutputMesh >	Superclass
typedef PointType::VectorType	VectorType
typedef itk::MapContainer < IdentifierType, NeighborSetType >	VertexNeighborListType
Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
virtual double	GetAlpha () const
virtual double	GetBeta () const
virtual double	GetDamping () const
virtual const GeometryMapType *	GetData ()
virtual double	GetGamma () const
const GradientImageType *	GetGradient () const
virtual const char *	GetNameOfClass () const
virtual unsigned int	GetRigidity () const
virtual void	SetAlpha (double _arg)
virtual void	SetBeta (double _arg)
virtual void	SetDamping (double _arg)
virtual void	SetData (GeometryMapType *_arg)
virtual void	SetGamma (double _arg)
void	SetGradient (const GradientImageType *gradientImage)
virtual void	SetRigidity (unsigned int _arg)

virtual void	SetIterations (int _arg)
virtual int	GetIterations () const

virtual int	GetImageWidth () const
virtual int	GetImageHeight () const
virtual int	GetImageDepth () const
Static Public Member Functions
static Pointer	New ()
Protected Member Functions
PointType	ComputeBarycentricCoordinates (PointType p, SimplexMeshGeometry *data)
virtual void	ComputeDisplacement ()
virtual void	ComputeExternalForce (SimplexMeshGeometry *data)
virtual void	ComputeGeometry ()
virtual void	ComputeInternalForce (SimplexMeshGeometry *data)
virtual void	ComputeOutput ()
virtual void	GenerateData ()
virtual void	Initialize ()
double	L_Func (double r, double d, double phi)
void	PrintSelf (std::ostream &os, Indent indent) const
virtual void	UpdateReferenceMetrics ()
Protected Attributes
double	m_Alpha
double	m_Beta
double	m_Damping
GeometryMapPointer	m_Data
double	m_Gamma
int	m_ImageDepth
int	m_ImageHeight
int	m_ImageWidth
int	m_Iterations
unsigned int	m_Rigidity
int	m_Step
virtual int	GetStep () const
	DeformableSimplexMesh3DFilter ()
	~DeformableSimplexMesh3DFilter ()
	DeformableSimplexMesh3DFilter (const Self &)
void	operator= (const Self &)

Detailed Description

template<class TInputMesh, class TOutputMesh>
class itk::DeformableSimplexMesh3DFilter< TInputMesh, TOutputMesh >

Three-dimensional deformable model for image segmentation.

DeformableSimplexMesh3DFilter is a discrete three-dimensional deformable model, which can be used to deform a 3-D SimplexMesh.

The mesh deformation is constrained by internal forces. The interal force can be scaled via SetAlpha (typical values are 0.01 < alpha < 0.3). The external force is derived from the image one wants to delineate. Therefore an image of type GradientImageType needs to be set by calling SetGradientImage(...). The external forces are scaled via SetBeta (typical values are 0.01 < beta < 1). One still needs to play around with these values.

To control the smoothness of the mesh a rigidity parameter can be adjusted. Low values (1 or 0) allow areas with high curvature. Higher values (around 7 or 8) will make the mesh smoother.

By setting the gamma parameter the regularity of the mesh is controlled. Low values (< 0.03) produce more regular mesh. Higher values ( 0.3 < gamma < 0.2) will allow to move the vertices to regions of higher curvature.

This approach for segmentation follows that of Delingette et al. (1997).

This filter currently assumes that the spacing of the input image is 1.

The user has to set the number of iterations for mesh evolution.

Author:: Thomas Boettger. Division Medical and Biological Informatics, German Cancer Research Center, Heidelberg.

Definition at line 76 of file itkDeformableSimplexMesh3DFilter.h.