ITK  4.0.0
Insight Segmentation and Registration Toolkit
Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions
itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType > Class Template Reference

This function is used in the ShapeDetectionLevelSetImageFilter to segment structures in an image based on a user supplied edge potential map. More...

#include <itkShapeDetectionLevelSetFunction.h>

Inheritance diagram for itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >:
Collaboration diagram for itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >:

List of all members.

Public Types

typedef SmartPointer< const SelfConstPointer
typedef TFeatureImageType FeatureImageType
typedef
Superclass::FeatureScalarType 
FeatureScalarType
typedef Superclass::FloatOffsetType FloatOffsetType
typedef
Superclass::GlobalDataStruct 
GlobalDataStruct
typedef Superclass::ImageType ImageType
typedef
Superclass::NeighborhoodType 
NeighborhoodType
typedef SmartPointer< SelfPointer
typedef Superclass::RadiusType RadiusType
typedef Superclass::ScalarValueType ScalarValueType
typedef
ShapeDetectionLevelSetFunction 
Self
typedef
SegmentationLevelSetFunction
< TImageType,
TFeatureImageType > 
Superclass

Public Member Functions

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)

Static Public Member Functions

static Pointer New ()

Static Public Attributes

static const unsigned int ImageDimension = Superclass::ImageDimension

Protected Member Functions

void operator= (const Self &)
 ShapeDetectionLevelSetFunction ()
 ShapeDetectionLevelSetFunction (const Self &)
virtual ~ShapeDetectionLevelSetFunction ()

Detailed Description

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

This function is used in the ShapeDetectionLevelSetImageFilter to segment structures in an image based on a user supplied edge potential map.

IMPORTANT
The LevelSetFunction class contain additional information necessary to gain full understanding of how to use this function.

ShapeDetectionLevelSetFunction is a subclass of the generic LevelSetFunction. It is used to segment structures in an image based on a user supplied edge potential map $ g(I) $, 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 image 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.

The edge potential image is set via the SetFeatureImage() method.

In this function both the propagation term $ P(\mathbf{x}) $ and the curvature spatial modifier term $ Z(\mathbf{x}) $ are taken directly from the edge potential image such that:

\[ P(\mathbf{x}) = g(\mathbf{x}) \]

\[ Z(\mathbf{x}) = g(\mathbf{x}) \]

Note that there is no advection term in this function.

This implementation is based on: "Shape Modeling with Front Propagation: A Level Set Approach", R. Malladi, J. A. Sethian and B. C. Vermuri. IEEE Trans. on Pattern Analysis and Machine Intelligence, Vol 17, No. 2, pp 158-174, February 1995

See also:
LevelSetFunction
SegmentationLevelSetImageFunction
ShapeDetectionLevelSetImageFilter

Definition at line 72 of file itkShapeDetectionLevelSetFunction.h.


Member Typedef Documentation

template<class TImageType , class TFeatureImageType = TImageType>
typedef SmartPointer< const Self > itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::ConstPointer
template<class TImageType , class TFeatureImageType = TImageType>
typedef TFeatureImageType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::FeatureImageType
template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::FeatureScalarType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::FeatureScalarType
template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::FloatOffsetType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::FloatOffsetType

A floating point offset from an image grid location. Used for interpolation among grid values in a neighborhood.

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

Definition at line 95 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::GlobalDataStruct itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::GlobalDataStruct
template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::ImageType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::ImageType

Extract some parameters from the superclass.

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

Definition at line 87 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::NeighborhoodType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::NeighborhoodType

The type of data structure that is passed to this function object to evaluate at a pixel that does not lie on a data set boundary.

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

Definition at line 91 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
typedef SmartPointer< Self > itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::Pointer
template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::RadiusType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::RadiusType
template<class TImageType , class TFeatureImageType = TImageType>
typedef Superclass::ScalarValueType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::ScalarValueType
template<class TImageType , class TFeatureImageType = TImageType>
typedef ShapeDetectionLevelSetFunction itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::Self

Standard class typedefs.

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

Definition at line 77 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
typedef SegmentationLevelSetFunction< TImageType, TFeatureImageType > itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::Superclass

Constructor & Destructor Documentation

template<class TImageType , class TFeatureImageType = TImageType>
itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::ShapeDetectionLevelSetFunction ( ) [inline, protected]

Definition at line 119 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
virtual itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::~ShapeDetectionLevelSetFunction ( ) [inline, protected, virtual]

Definition at line 126 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::ShapeDetectionLevelSetFunction ( const Self ) [protected]

Member Function Documentation

template<class TImageType , class TFeatureImageType = TImageType>
virtual void itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::CalculateSpeedImage ( ) [virtual]

This method must be defined in a subclass to implement a working function object. This method is called before the solver begins its work to produce the speed image used as the level set function's Propagation speed term. See LevelSetFunction for more information.

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

template<class TImageType , class TFeatureImageType = TImageType>
virtual::itk::LightObject::Pointer itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::CreateAnother ( void  ) const [virtual]

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::LevelSetFunction< TImageType >.

template<class TImageType , class TFeatureImageType = TImageType>
virtual ScalarValueType itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::CurvatureSpeed ( const NeighborhoodType neighborhood,
const FloatOffsetType offset,
GlobalDataStruct gd 
) const [inline, virtual]

The curvature speed is same as the propagation speed.

Reimplemented from itk::LevelSetFunction< TImageType >.

Definition at line 105 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
virtual const char* itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::GetNameOfClass ( ) const [virtual]

Run-time type information (and related methods)

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

template<class TImageType , class TFeatureImageType = TImageType>
virtual void itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::Initialize ( const RadiusType r) [inline, virtual]

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 109 of file itkShapeDetectionLevelSetFunction.h.

template<class TImageType , class TFeatureImageType = TImageType>
static Pointer itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::New ( ) [static]

Method for creation through the object factory.

Reimplemented from itk::LevelSetFunction< TImageType >.

template<class TImageType , class TFeatureImageType = TImageType>
void itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::operator= ( const Self ) [protected]

Laplacean smoothing term

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.


Member Data Documentation

template<class TImageType , class TFeatureImageType = TImageType>
const unsigned int itk::ShapeDetectionLevelSetFunction< TImageType, TFeatureImageType >::ImageDimension = Superclass::ImageDimension [static]

Extract some parameters from the superclass.

Reimplemented from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >.

Definition at line 100 of file itkShapeDetectionLevelSetFunction.h.


The documentation for this class was generated from the following file: