ITK
4.4.0
Insight Segmentation and Registration Toolkit
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#include <itkGeodesicActiveContourShapePriorLevelSetFunction.h>
This function is used in GeodesicActiveContourShapePriorSegmentationLevelSetFilter to segment structures in an image based on user supplied edge potential map and shape model.
GeodesicActiveContourShapePriorLevelSetFunction is a subclass of the generic LevelSetFunction. It is used to segment structures in an image 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:
where is image intensity and is the derivative of Gaussian operator.
The edge potential image is set via the SetFeatureImage() method.
In this function both the propagation term and the curvature spatial modifier term are taken directly from the edge potential image such that:
An advection term is constructed from the negative gradient of the edge potential image.
This term behaves like a doublet attracting the contour to the edges.
This class extends the basic LevelSetFunction with a shape prior term as developed in [1].
where is the signed distance function from a target shape and is a scalar constant.
The target shape signed distance function is supplied through a ShapeSignedDistanceFunction object. Typically, the shape is a function of a set of parameters.
Definition at line 93 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
Static Public Member Functions | |
static Pointer | New () |
Static Public Member Functions inherited from itk::ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType > | |
static Pointer | New () |
Static Public Attributes | |
static const unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType > | |
static const unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType > | |
static const unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::LevelSetFunction< TImageType > | |
static const unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::FiniteDifferenceFunction< TImageType > | |
static const unsigned int | ImageDimension = ImageType::ImageDimension |
Private Attributes | |
double | m_DerivativeSigma |
Additional Inherited Members | |
Protected Types inherited from itk::LightObject | |
typedef int | InternalReferenceCountType |
Static Protected Member Functions inherited from itk::LevelSetFunction< TImageType > | |
static VectorType | InitializeZeroVectorConstant () |
Protected Attributes inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType > | |
VectorImageType::Pointer | m_AdvectionImage |
FeatureImageType::ConstPointer | m_FeatureImage |
InterpolatorType::Pointer | m_Interpolator |
ImageType::Pointer | m_SpeedImage |
Functor::VectorCast< typename VectorInterpolatorType::OutputType, VectorType > | m_VectorCast |
VectorInterpolatorType::Pointer | m_VectorInterpolator |
Static Protected Attributes inherited from itk::LevelSetFunction< TImageType > | |
static double | m_DT |
static double | m_WaveDT |
static VectorType | m_ZeroVectorConstant |
typedef SmartPointer< const Self > itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::ConstPointer |
Definition at line 102 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef TFeatureImageType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::FeatureImageType |
Definition at line 103 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::FeatureScalarType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::FeatureScalarType |
Definition at line 116 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::FloatOffsetType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::FloatOffsetType |
Definition at line 118 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::GlobalDataStruct itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::GlobalDataStruct |
Definition at line 120 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::ImageType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::ImageType |
Extract some parameters from the superclass.
Definition at line 110 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::NeighborhoodType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::NeighborhoodType |
Definition at line 114 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef SmartPointer< Self > itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::Pointer |
Definition at line 101 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::RadiusType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::RadiusType |
Definition at line 117 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::ScalarValueType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::ScalarValueType |
Definition at line 115 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef GeodesicActiveContourShapePriorLevelSetFunction itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::Self |
Standard class typedefs.
Definition at line 99 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType > itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::Superclass |
Definition at line 100 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
typedef Superclass::VectorImageType itk::GeodesicActiveContourShapePriorLevelSetFunction< TImageType, TFeatureImageType >::VectorImageType |
Definition at line 119 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Definition at line 156 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Definition at line 166 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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protected |
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Compute the advection field from feature image.
Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.
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Compute speed image from feature image.
Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.
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Create an object from an instance, potentially deferring to a factory. This method allows you to create an instance of an object that is exactly the same type as the referring object. This is useful in cases where an object has been cast back to a base class.
Reimplemented from itk::LightObject.
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inlinevirtual |
The curvature speed is same as the propagation speed.
Definition at line 133 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Set/Get the sigma for the Gaussian kernel used to compute the gradient of the feature image needed for the advection term of the equation.
Definition at line 141 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Run-time type information (and related methods)
Reimplemented from itk::ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >.
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inlinevirtual |
This method creates the appropriate member variable operators for the level-set calculations. The argument to this function is a the radius necessary for performing the level-set calculations.
Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.
Definition at line 145 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Method for creation through the object factory.
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Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.
Reimplemented from itk::FiniteDifferenceFunction< TImageType >.
Definition at line 173 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Set/Get the sigma for the Gaussian kernel used to compute the gradient of the feature image needed for the advection term of the equation.
Definition at line 139 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Extract some parameters from the superclass.
Definition at line 124 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.
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Definition at line 180 of file itkGeodesicActiveContourShapePriorLevelSetFunction.h.