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itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType > Class Template Reference
[Level Set-Based Segmentation Filters]

Segments structures in images based on user supplied edge potential map. More...

#include <itkNarrowBandCurvesLevelSetImageFilter.h>

Inheritance diagram for itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >:

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Collaboration diagram for itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >:

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List of all members.

Public Types

typedef NarrowBandCurvesLevelSetImageFilter Self
typedef NarrowBandLevelSetImageFilter<
TInputImage, TFeatureImage,
TOutputPixelType, Image<
TOutputPixelType,::itk::GetImageDimension<
TInputImage >::ImageDimension > > 		Superclass
typedef SmartPointer< Self > Pointer
typedef SmartPointer< const
Self > 		ConstPointer
typedef Superclass::ValueType ValueType
typedef Superclass::OutputImageType OutputImageType
typedef Superclass::FeatureImageType FeatureImageType
typedef CurvesLevelSetFunction<
OutputImageType, FeatureImageType > 		CurvesFunctionType
typedef CurvesFunctionType::Pointer CurvesFunctionPointer

Public Member Functions

virtual const char * GetNameOfClass () const
void SetDerivativeSigma (float value)
float GetDerivativeSigma () const

Static Public Member Functions

Pointer New ()

Protected Member Functions

 ~NarrowBandCurvesLevelSetImageFilter ()
 NarrowBandCurvesLevelSetImageFilter ()
virtual void PrintSelf (std::ostream &os, Indent indent) const
 NarrowBandCurvesLevelSetImageFilter (const Self &)
void operator= (const Self &)
void GenerateData ()

Detailed Description

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
class itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >

Segments structures in images based on user supplied edge potential map.

IMPORTANT
The NarrowBandLevelSetImageFilter class and the CurvesLevelSetFunction class contain additional information necessary to the full understanding of how to use this filter.
OVERVIEW
This class is a level set method segmentation filter. An initial contour is propagated outwards (or inwards) until it sticks to the shape boundaries. This is done by using a level set speed function based on a user supplied edge potential map.
INPUTS
This filter requires two inputs. The first input is a initial level set. The initial level set is a real image which contains the initial contour/surface as the zero level set. For example, a signed distance function from the initial contour/surface is typically used. Unlike the simpler ShapeDetectionLevelSetImageFilter the initial contour does not have to lie wholly within the shape to be segmented. The intiial contour is allow to overlap the shape boundary. The extra advection term in the update equation behaves like a doublet and attracts the contour to the boundary. This approach for segmentation follows that of Lorigo et al (2001).
The second input is the feature image. For this filter, this is the edge potential map. General characteristics of an edge potential map is that it has values close to zero in regions near the edges and values close to one inside the shape itself. Typically, the edge potential map is compute from 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.

See NarrowBandLevelSetImageFilter and NarrowBandImageFilterBase for more information on Inputs.
PARAMETERS
The method SetUseNegatiiveFeatures() can be used to switch from propagating inwards (false) versus propagting outwards (true).
This implementation allows the user to set the weights between the propagation, advection and curvature term using methods SetPropagationScaling(), SetAdvectionScaling(), SetCurvatureScaling(). In general, the larger the CurvatureScaling, the smoother the resulting contour. To follow the implementation in Caselles's paper, set the PropagationScaling to $ c $ (the inflation or ballon force) and AdvectionScaling and CurvatureScaling both to 1.0.

OUTPUTS
The filter outputs a single, scalar, real-valued image. Negative values in the output image are inside the segmentated region and positive values in the image are outside of the inside region. The zero crossings of the image correspond to the position of the level set front.
REFERENCES
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 NarrowBandImageFilterBase and NarrowBandLevelSetImageFilter for more information.
See also:
NarrowBandLevelSetImageFilter

CurvesLevelSetFunction

Definition at line 101 of file itkNarrowBandCurvesLevelSetImageFilter.h.

Member Typedef Documentation

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef SmartPointer<const Self> itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::ConstPointer
 

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 109 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef CurvesFunctionType::Pointer itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::CurvesFunctionPointer
 

Definition at line 120 of file itkNarrowBandCurvesLevelSetImageFilter.h.

Referenced by itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::~NarrowBandCurvesLevelSetImageFilter().

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef CurvesLevelSetFunction<OutputImageType, FeatureImageType> itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::CurvesFunctionType
 

Type of the segmentation function

Definition at line 118 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef Superclass::FeatureImageType itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::FeatureImageType
 

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 114 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef Superclass::OutputImageType itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::OutputImageType
 

Local image typedefs

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 113 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef SmartPointer<Self> itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Pointer
 

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 108 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef NarrowBandCurvesLevelSetImageFilter itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Self
 

Standard class typedefs

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 106 of file itkNarrowBandCurvesLevelSetImageFilter.h.

Referenced by itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::~NarrowBandCurvesLevelSetImageFilter().

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef NarrowBandLevelSetImageFilter<TInputImage, TFeatureImage, TOutputPixelType, Image<TOutputPixelType, ::itk::GetImageDimension<TInputImage>::ImageDimension> > itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Superclass
 

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 107 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
typedef Superclass::ValueType itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::ValueType
 

Inherited typedef from the superclass.

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

Definition at line 112 of file itkNarrowBandCurvesLevelSetImageFilter.h.

Constructor & Destructor Documentation

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::~NarrowBandCurvesLevelSetImageFilter (   )  [inline, protected]
 

Definition at line 137 of file itkNarrowBandCurvesLevelSetImageFilter.h.

References itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::CurvesFunctionPointer, and itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Self.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::NarrowBandCurvesLevelSetImageFilter (   )  [protected]
 

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::NarrowBandCurvesLevelSetImageFilter (  const Self &   )  [protected]
 

Member Function Documentation

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
void itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::GenerateData (   )  [protected, virtual]
 

Overridden from Superclass to handle the case when Propagation Scaling is zero.

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
float itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::GetDerivativeSigma (   )  const [inline]
 

Set the value of sigma used to compute derivatives

Definition at line 132 of file itkNarrowBandCurvesLevelSetImageFilter.h.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
virtual const char* itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::GetNameOfClass (   )  const [virtual]
 

Run-time type information (and related methods).

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
Pointer itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::New (   )  [static]
 

Method for creation through the object factory

Reimplemented from itk::Object.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
void itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::operator= (  const Self &   )  [protected]
 

Reimplemented from itk::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
virtual void itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::PrintSelf (  std::ostream &  os,
Indent  indent
)  const [protected, virtual]
 

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::NarrowBandLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType, TOutputImage >.

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
void itk::NarrowBandCurvesLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::SetDerivativeSigma (  float  value  )  [inline]
 

Set the value of sigma used to compute derivatives

Definition at line 129 of file itkNarrowBandCurvesLevelSetImageFilter.h.

The documentation for this class was generated from the following file:
Generated at Thu May 25 01:50:31 2006 for ITK by doxygen 1.3.5 written by Dimitri van Heesch, © 1997-2000