SimpleITK  1.3.0.dev466
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itk::simple::CannySegmentationLevelSetImageFilter Class Reference

Segments structures in images based on image features derived from pseudo-canny-edges. More...

#include <sitkCannySegmentationLevelSetImageFilter.h>

+ Inheritance diagram for itk::simple::CannySegmentationLevelSetImageFilter:
+ Collaboration diagram for itk::simple::CannySegmentationLevelSetImageFilter:

Public Types

typedef RealPixelIDTypeList PixelIDTypeList
 
typedef CannySegmentationLevelSetImageFilter Self
 
- Public Types inherited from itk::simple::ImageFilter< 0 >
typedef ImageFilter Self
 
- Public Types inherited from itk::simple::ProcessObject
typedef ProcessObject Self
 

Public Member Functions

 CannySegmentationLevelSetImageFilter ()
 
Image Execute (const Image &initialImage, const Image &featureImage)
 
Image Execute (const Image &initialImage, const Image &featureImage, double threshold, double variance, double maximumRMSError, double propagationScaling, double curvatureScaling, double advectionScaling, uint32_t numberOfIterations, bool reverseExpansionDirection, double isoSurfaceValue)
 
double GetAdvectionScaling () const
 
Image GetCannyImage () const
 
double GetCurvatureScaling () const
 
uint32_t GetElapsedIterations () const
 Number of iterations run. More...
 
double GetIsoSurfaceValue () const
 
double GetMaximumRMSError () const
 
std::string GetName () const
 
uint32_t GetNumberOfIterations () const
 
double GetPropagationScaling () const
 
bool GetReverseExpansionDirection () const
 
double GetRMSChange () const
 The Root Mean Square of the levelset upon termination. More...
 
double GetThreshold () const
 
double GetVariance () const
 
SelfReverseExpansionDirectionOff ()
 
SelfReverseExpansionDirectionOn ()
 
SelfSetAdvectionScaling (double AdvectionScaling)
 
SelfSetCurvatureScaling (double CurvatureScaling)
 
SelfSetIsoSurfaceValue (double IsoSurfaceValue)
 
SelfSetMaximumRMSError (double MaximumRMSError)
 
SelfSetNumberOfIterations (uint32_t NumberOfIterations)
 
SelfSetPropagationScaling (double PropagationScaling)
 
SelfSetReverseExpansionDirection (bool ReverseExpansionDirection)
 
SelfSetThreshold (double Threshold)
 
SelfSetVariance (double Variance)
 
std::string ToString () const
 
virtual ~CannySegmentationLevelSetImageFilter ()
 
- Public Member Functions inherited from itk::simple::ImageFilter< 0 >
 ImageFilter ()
 
virtual ~ImageFilter ()=0
 
- Public Member Functions inherited from itk::simple::ProcessObject
virtual void Abort ()
 
virtual int AddCommand (itk::simple::EventEnum event, itk::simple::Command &cmd)
 Add a Command Object to observer the event. More...
 
virtual float GetProgress () const
 An Active Measurement of the progress of execution. More...
 
virtual bool HasCommand (itk::simple::EventEnum event) const
 Query of this object has any registered commands for event. More...
 
 ProcessObject ()
 
virtual void RemoveAllCommands ()
 Remove all registered commands. More...
 
virtual ~ProcessObject ()
 
virtual void DebugOn ()
 
virtual void DebugOff ()
 
virtual bool GetDebug () const
 
virtual void SetDebug (bool debugFlag)
 
virtual void SetNumberOfThreads (unsigned int n)
 
virtual unsigned int GetNumberOfThreads () const
 

Private Types

typedef Image(Self::* MemberFunctionType) (const Image *initialImage, const Image *featureImage)
 

Private Member Functions

template<class TImageType >
Image ExecuteInternal (const Image *initialImage, const Image *featureImage)
 

Private Attributes

double m_AdvectionScaling
 
Image m_CannyImage
 
double m_CurvatureScaling
 
uint32_t m_ElapsedIterations
 
double m_IsoSurfaceValue
 
double m_MaximumRMSError
 
nsstd::auto_ptr< detail::MemberFunctionFactory< MemberFunctionType > > m_MemberFactory
 
uint32_t m_NumberOfIterations
 
double m_PropagationScaling
 
bool m_ReverseExpansionDirection
 
double m_RMSChange
 
double m_Threshold
 
double m_Variance
 

Friends

struct detail::MemberFunctionAddressor< MemberFunctionType >
 

Additional Inherited Members

- Static Public Member Functions inherited from itk::simple::ProcessObject
static bool GetGlobalDefaultDebug ()
 
static void GlobalDefaultDebugOff ()
 
static void GlobalDefaultDebugOn ()
 
static void SetGlobalDefaultDebug (bool debugFlag)
 
static void GlobalWarningDisplayOn ()
 
static void GlobalWarningDisplayOff ()
 
static void SetGlobalWarningDisplay (bool flag)
 
static bool GetGlobalWarningDisplay ()
 
static void SetGlobalDefaultNumberOfThreads (unsigned int n)
 
static unsigned int GetGlobalDefaultNumberOfThreads ()
 
static double GetGlobalDefaultCoordinateTolerance ()
 Access the global tolerance to determine congruent spaces. More...
 
static void SetGlobalDefaultCoordinateTolerance (double)
 Access the global tolerance to determine congruent spaces. More...
 
static double GetGlobalDefaultDirectionTolerance ()
 Access the global tolerance to determine congruent spaces. More...
 
static void SetGlobalDefaultDirectionTolerance (double)
 Access the global tolerance to determine congruent spaces. More...
 
- Protected Member Functions inherited from itk::simple::ProcessObject
virtual unsigned long AddITKObserver (const itk::EventObject &, itk::Command *)
 
virtual itk::ProcessObjectGetActiveProcess ()
 
virtual void OnActiveProcessDelete ()
 
virtual void onCommandDelete (const itk::simple::Command *cmd) SITK_NOEXCEPT
 
virtual void PreUpdate (itk::ProcessObject *p)
 
virtual void RemoveITKObserver (EventCommand &e)
 
- Protected Member Functions inherited from itk::simple::NonCopyable
 NonCopyable ()
 
- Static Protected Member Functions inherited from itk::simple::ImageFilter< 0 >
static void FixNonZeroIndex (TImageType *img)
 
- Static Protected Member Functions inherited from itk::simple::ProcessObject
template<class TImageType >
static TImageType::ConstPointer CastImageToITK (const Image &img)
 
template<class TImageType >
static Image CastITKToImage (TImageType *img)
 
template<class TPixelType , unsigned int VImageDimension, unsigned int VLength, template< typename, unsigned int > class TVector>
static Image CastITKToImage (itk::Image< TVector< TPixelType, VLength >, VImageDimension > *img)
 
static const itk::EventObjectGetITKEventObject (EventEnum e)
 
template<typename T >
static std::ostream & ToStringHelper (std::ostream &os, const T &v)
 
static std::ostream & ToStringHelper (std::ostream &os, const char &v)
 
static std::ostream & ToStringHelper (std::ostream &os, const signed char &v)
 
static std::ostream & ToStringHelper (std::ostream &os, const unsigned char &v)
 

Detailed Description

Segments structures in images based on image features derived from pseudo-canny-edges.

IMPORTANT
The SegmentationLevelSetImageFilter class and the CannySegmentationLevelSetFunction 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. It constructs a speed function which is designed to lock onto edges as detected by a Canny filter.
The CannySegmentationLevelSetImageFilter can be a tool for refining an existing segmentation, or it can be used to try to segment a region by itself. Like all other level-set based segmentation filters (see SegmentationLevelSetImageFilter ), it works by first constructing a scalar speed term and a vector advection field based on edge features in the image. The level set front is then moved according to these two terms with the addition of a third curvature term to contol the smoothness of the solution.
The speed term is constructed as the Danielsson distance transform of the Canny edge image, as calculated by the CannyEdgeDetectionImageFilter . This scalar speed can be tuned in and out of the final evolution equation by setting the PropagationScaling parameter (a value of 0 removes the speed term).
The advection field term is constructed by minimizing Danielsson distance squared. i.e. $ \mbox{min} \int D^2 \Rightarrow D \nabla D $ . This term moves the level set down the gradient of the distance transform.
In practice, you may set the speed (propagation) term to zero if your initialization is already close to the edge you are interested in. If you are trying to segment a region by seeding with a small surface (blob, sphere) then you will likely want to add speed (propagation) to the equation so that the levelsets can expand along zero gradients. The relative influence of these two terms are controlled by the SetPropagationScaling and SetAdvectionScaling parameters.
INPUTS
This filter requires two inputs. The first input is a seed image. This seed image must contain an isosurface that you want to use as the seed for your segmentation. It can be a binary, graylevel, or floating point image. The only requirement is that it contain a closed isosurface that you will identify as the seed by setting the IsosurfaceValue parameter of the filter. For a binary image you will want to set your isosurface value halfway between your on and off values (i.e. for 0's and 1's, use an isosurface value of 0.5).
The second input is the feature image. This is the image from which the speed function will be calculated. For most applications, this is the image that you want to segment. The desired isosurface in your seed image should lie within the region of your feature image that you are trying to segment.
See SegmentationLevelSetImageFilter for more information on Inputs.
OUTPUTS
The filter outputs a single, scalar, real-valued image. Positive *values in the output image are inside the segmentated region and negative *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.
See SparseFieldLevelSetImageFilter and SegmentationLevelSetImageFilter for more information.
PARAMETERS
There are five parameters important for controlling the behavior of this filter.
(1) Threshold. Sets the thresholding value of the Canny edge detection. See CannyEdgeDetectionImageFilter for more information.
(2) Variance. Controls the smoothing parameter of the gaussian filtering done during Canny edge detection.
(3) CurvatureScaling. Controls the degree to which curvature influences the evolution of the level set. Higher values relative to Propagation and Advection scalings will yield a smoother surface.
(4) PropagationScaling. Scales the propagation (speed) term of the level set equation. Set this term to zero to allow the level set to flow only down the gradient of the distance transform.
(5) AdvectionScaling. Scales influence of the advection field relative to curvature and propagation terms.
See also
SegmentationLevelSetImageFilter
CannySegmentationLevelSetFunction ,
SparseFieldLevelSetImageFilter
itk::simple::CannySegmentationLevelSet for the procedural interface
itk::CannySegmentationLevelSetImageFilter for the Doxygen on the original ITK class.

Definition at line 97 of file sitkCannySegmentationLevelSetImageFilter.h.

Member Typedef Documentation

typedef Image(Self::* itk::simple::CannySegmentationLevelSetImageFilter::MemberFunctionType) (const Image *initialImage, const Image *featureImage)
private

Setup for member function dispatching

Definition at line 234 of file sitkCannySegmentationLevelSetImageFilter.h.

Define the pixels types supported by this filter

Definition at line 109 of file sitkCannySegmentationLevelSetImageFilter.h.

Definition at line 99 of file sitkCannySegmentationLevelSetImageFilter.h.

Constructor & Destructor Documentation

virtual itk::simple::CannySegmentationLevelSetImageFilter::~CannySegmentationLevelSetImageFilter ( )
virtual

Destructor

itk::simple::CannySegmentationLevelSetImageFilter::CannySegmentationLevelSetImageFilter ( )

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

Image itk::simple::CannySegmentationLevelSetImageFilter::Execute ( const Image initialImage,
const Image featureImage 
)

Execute the filter on the input image

Image itk::simple::CannySegmentationLevelSetImageFilter::Execute ( const Image initialImage,
const Image featureImage,
double  threshold,
double  variance,
double  maximumRMSError,
double  propagationScaling,
double  curvatureScaling,
double  advectionScaling,
uint32_t  numberOfIterations,
bool  reverseExpansionDirection,
double  isoSurfaceValue 
)

Execute the filter on the input image with the given parameters

template<class TImageType >
Image itk::simple::CannySegmentationLevelSetImageFilter::ExecuteInternal ( const Image initialImage,
const Image featureImage 
)
private
double itk::simple::CannySegmentationLevelSetImageFilter::GetAdvectionScaling ( ) const
inline

Definition at line 163 of file sitkCannySegmentationLevelSetImageFilter.h.

Image itk::simple::CannySegmentationLevelSetImageFilter::GetCannyImage ( ) const
inline

Get the Canny image that was used to create the speed and advection images

This is a measurement. Its value is updated in the Execute methods, so the value will only be valid after an execution.

Definition at line 214 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetCurvatureScaling ( ) const
inline

Definition at line 155 of file sitkCannySegmentationLevelSetImageFilter.h.

uint32_t itk::simple::CannySegmentationLevelSetImageFilter::GetElapsedIterations ( ) const
inline

Number of iterations run.

This is a measurement. Its value is updated in the Execute methods, so the value will only be valid after an execution.

Definition at line 198 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetIsoSurfaceValue ( ) const
inline

Definition at line 191 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetMaximumRMSError ( ) const
inline

Definition at line 139 of file sitkCannySegmentationLevelSetImageFilter.h.

std::string itk::simple::CannySegmentationLevelSetImageFilter::GetName ( ) const
inlinevirtual

Name of this class

Implements itk::simple::ProcessObject.

Definition at line 217 of file sitkCannySegmentationLevelSetImageFilter.h.

uint32_t itk::simple::CannySegmentationLevelSetImageFilter::GetNumberOfIterations ( ) const
inline

Definition at line 171 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetPropagationScaling ( ) const
inline

Definition at line 147 of file sitkCannySegmentationLevelSetImageFilter.h.

bool itk::simple::CannySegmentationLevelSetImageFilter::GetReverseExpansionDirection ( ) const
inline

Definition at line 183 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetRMSChange ( ) const
inline

The Root Mean Square of the levelset upon termination.

This is a measurement. Its value is updated in the Execute methods, so the value will only be valid after an execution.

Definition at line 206 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetThreshold ( ) const
inline

Set the Threshold parameter of the CannyEdgeDetectionImageFilter used by the underlying level set function.

Definition at line 121 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::GetVariance ( ) const
inline

Set the Variance parameter of the CannyEdgeDetectionImageFilter used by the underlying level set function.

Definition at line 131 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::ReverseExpansionDirectionOff ( )
inline

Definition at line 179 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::ReverseExpansionDirectionOn ( )
inline

Set the value of ReverseExpansionDirection to true or false respectfully.

Definition at line 178 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetAdvectionScaling ( double  AdvectionScaling)
inline

Definition at line 159 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetCurvatureScaling ( double  CurvatureScaling)
inline

Definition at line 151 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetIsoSurfaceValue ( double  IsoSurfaceValue)
inline

Definition at line 187 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetMaximumRMSError ( double  MaximumRMSError)
inline

Definition at line 135 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetNumberOfIterations ( uint32_t  NumberOfIterations)
inline

Definition at line 167 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetPropagationScaling ( double  PropagationScaling)
inline

Definition at line 143 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetReverseExpansionDirection ( bool  ReverseExpansionDirection)
inline

Definition at line 175 of file sitkCannySegmentationLevelSetImageFilter.h.

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetThreshold ( double  Threshold)
inline

Set the Threshold parameter of the CannyEdgeDetectionImageFilter used by the underlying level set function.

Definition at line 116 of file sitkCannySegmentationLevelSetImageFilter.h.

References itk::simple::Threshold().

Self& itk::simple::CannySegmentationLevelSetImageFilter::SetVariance ( double  Variance)
inline

Set the Variance parameter of the CannyEdgeDetectionImageFilter used by the underlying level set function.

Definition at line 126 of file sitkCannySegmentationLevelSetImageFilter.h.

std::string itk::simple::CannySegmentationLevelSetImageFilter::ToString ( ) const
virtual

Print ourselves out

Reimplemented from itk::simple::ProcessObject.

Friends And Related Function Documentation

Definition at line 238 of file sitkCannySegmentationLevelSetImageFilter.h.

Member Data Documentation

double itk::simple::CannySegmentationLevelSetImageFilter::m_AdvectionScaling
private

Definition at line 252 of file sitkCannySegmentationLevelSetImageFilter.h.

Image itk::simple::CannySegmentationLevelSetImageFilter::m_CannyImage
private

Definition at line 264 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_CurvatureScaling
private

Definition at line 250 of file sitkCannySegmentationLevelSetImageFilter.h.

uint32_t itk::simple::CannySegmentationLevelSetImageFilter::m_ElapsedIterations
private

Definition at line 260 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_IsoSurfaceValue
private

Definition at line 258 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_MaximumRMSError
private

Definition at line 246 of file sitkCannySegmentationLevelSetImageFilter.h.

nsstd::auto_ptr<detail::MemberFunctionFactory<MemberFunctionType> > itk::simple::CannySegmentationLevelSetImageFilter::m_MemberFactory
private

Definition at line 240 of file sitkCannySegmentationLevelSetImageFilter.h.

uint32_t itk::simple::CannySegmentationLevelSetImageFilter::m_NumberOfIterations
private

Definition at line 254 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_PropagationScaling
private

Definition at line 248 of file sitkCannySegmentationLevelSetImageFilter.h.

bool itk::simple::CannySegmentationLevelSetImageFilter::m_ReverseExpansionDirection
private

Definition at line 256 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_RMSChange
private

Definition at line 262 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_Threshold
private

Definition at line 243 of file sitkCannySegmentationLevelSetImageFilter.h.

double itk::simple::CannySegmentationLevelSetImageFilter::m_Variance
private

Definition at line 244 of file sitkCannySegmentationLevelSetImageFilter.h.


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