Public Types | Public Member Functions | Private Types | Private Member Functions | Private Attributes | Friends | List of all members
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:

Detailed Description

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

The SegmentationLevelSetImageFilter class and the CannySegmentationLevelSetFunction class contain additional information necessary to the full understanding of how to use this filter.
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 control 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.
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.
The filter outputs a single, scalar, real-valued image. Positive *values in the output image are inside the segmented 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.
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
CannySegmentationLevelSetFunction ,
itk::simple::CannySegmentationLevelSet for the procedural interface
itk::CannySegmentationLevelSetImageFilter for the Doxygen on the original ITK class.

Definition at line 115 of file sitkCannySegmentationLevelSetImageFilter.h.

Public Types

using PixelIDTypeList = RealPixelIDTypeList
using Self = CannySegmentationLevelSetImageFilter
- Public Types inherited from itk::simple::ImageFilter
using Self = ImageFilter
- Public Types inherited from itk::simple::ProcessObject
using Self = ProcessObject

Public Member Functions

 CannySegmentationLevelSetImageFilter ()
Image Execute (const Image &initialImage, const Image &featureImage)
Image Execute (Image &&initialImage, const Image &featureImage)
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
 ImageFilter ()
virtual ~ImageFilter ()=0
- Public Member Functions inherited from itk::simple::ProcessObject
virtual void Abort ()
virtual int AddCommand (itk::simple::EventEnum event, const std::function< void()> &func)
 Directly add a callback to observe an event. More...
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
virtual void SetNumberOfWorkUnits (unsigned int n)
virtual unsigned int GetNumberOfWorkUnits () const

Private Types

using MemberFunctionType = Image(Self::*)(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 {1.0}
Image m_CannyImage {Image()}
double m_CurvatureScaling {1.0}
uint32_t m_ElapsedIterations {0}
bool m_InPlace {false}
double m_IsoSurfaceValue {0.0}
double m_MaximumRMSError {0.02}
std::unique_ptr< detail::MemberFunctionFactory< MemberFunctionType > > m_MemberFactory
uint32_t m_NumberOfIterations {1000u}
double m_PropagationScaling {1.0}
bool m_ReverseExpansionDirection {false}
double m_RMSChange {0.0}
double m_Threshold {0.0}
double m_Variance {0.0}


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 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...
static bool SetGlobalDefaultThreader (const std::string &threader)
 Set/Get the default threader used for process objects. More...
static std::string GetGlobalDefaultThreader ()
 Set/Get the default threader used for process objects. More...
static void SetGlobalDefaultNumberOfThreads (unsigned int n)
static unsigned int GetGlobalDefaultNumberOfThreads ()
 Set/Get the default threader used for process objects. More...
- Protected Member Functions inherited from itk::simple::ImageFilter
void CheckImageMatchingDimension (const Image &image1, const Image &image2, const std::string &image2Name)
void CheckImageMatchingPixelType (const Image &image1, const Image &image2, const std::string &image2Name)
void CheckImageMatchingSize (const Image &image1, const Image &image2, const std::string &image2Name)
- 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) noexcept
virtual void PreUpdate (itk::ProcessObject *p)
virtual void RemoveITKObserver (EventCommand &e)
- Protected Member Functions inherited from itk::simple::NonCopyable
 NonCopyable ()=default
 NonCopyable (const NonCopyable &)=delete
NonCopyableoperator= (const NonCopyable &)=delete
- Static Protected Member Functions inherited from itk::simple::ImageFilter
template<class TImageType >
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 TPixelType , unsigned int VImageDimension, unsigned int VLength, template< typename, unsigned int > class TVector>
static Image CastITKToImage (itk::Image< TVector< TPixelType, VLength >, VImageDimension > *img)
template<unsigned int VImageDimension, unsigned int VLength, template< unsigned int > class TVector>
static Image CastITKToImage (itk::Image< TVector< VLength >, VImageDimension > *img)
template<class TImageType >
static Image CastITKToImage (TImageType *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)

Member Typedef Documentation

◆ MemberFunctionType

using itk::simple::CannySegmentationLevelSetImageFilter::MemberFunctionType = Image (Self::*)( const Image * initialImage, const Image * featureImage )

Setup for member function dispatching

Definition at line 251 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ PixelIDTypeList

Define the pixels types supported by this filter

Definition at line 127 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ Self

Definition at line 117 of file sitkCannySegmentationLevelSetImageFilter.h.

Constructor & Destructor Documentation

◆ ~CannySegmentationLevelSetImageFilter()

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


◆ CannySegmentationLevelSetImageFilter()

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

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

◆ Execute() [1/2]

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

◆ Execute() [2/2]

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

Execute the filter on the input image

◆ ExecuteInternal()

template<class TImageType >
Image itk::simple::CannySegmentationLevelSetImageFilter::ExecuteInternal ( const Image initialImage,
const Image featureImage 

◆ GetAdvectionScaling()

double itk::simple::CannySegmentationLevelSetImageFilter::GetAdvectionScaling ( ) const

Definition at line 180 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetCannyImage()

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

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 231 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetCurvatureScaling()

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

Definition at line 172 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetElapsedIterations()

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

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 215 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetIsoSurfaceValue()

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

Definition at line 208 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetMaximumRMSError()

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

Definition at line 156 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetName()

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

Name of this class

Implements itk::simple::ProcessObject.

Definition at line 235 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetNumberOfIterations()

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

Definition at line 188 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetPropagationScaling()

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

Definition at line 164 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetReverseExpansionDirection()

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

Definition at line 200 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetRMSChange()

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

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 223 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetThreshold()

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

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

Definition at line 138 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ GetVariance()

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

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

Definition at line 148 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ ReverseExpansionDirectionOff()

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

Definition at line 196 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ ReverseExpansionDirectionOn()

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

Set the value of ReverseExpansionDirection to true or false respectfully.

Definition at line 195 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetAdvectionScaling()

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

Definition at line 176 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetCurvatureScaling()

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

Definition at line 168 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetIsoSurfaceValue()

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

Definition at line 204 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetMaximumRMSError()

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

Definition at line 152 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetNumberOfIterations()

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

Definition at line 184 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetPropagationScaling()

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

Definition at line 160 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetReverseExpansionDirection()

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

Definition at line 192 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ SetThreshold()

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

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

Definition at line 133 of file sitkCannySegmentationLevelSetImageFilter.h.

References itk::simple::Threshold().

◆ SetVariance()

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

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

Definition at line 143 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ ToString()

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

Print ourselves out

Reimplemented from itk::simple::ProcessObject.

Friends And Related Function Documentation

◆ detail::MemberFunctionAddressor< MemberFunctionType >

Definition at line 255 of file sitkCannySegmentationLevelSetImageFilter.h.

Member Data Documentation

◆ m_AdvectionScaling

double itk::simple::CannySegmentationLevelSetImageFilter::m_AdvectionScaling {1.0}

Definition at line 274 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_CannyImage

Image itk::simple::CannySegmentationLevelSetImageFilter::m_CannyImage {Image()}

Definition at line 290 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_CurvatureScaling

double itk::simple::CannySegmentationLevelSetImageFilter::m_CurvatureScaling {1.0}

Definition at line 271 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_ElapsedIterations

uint32_t itk::simple::CannySegmentationLevelSetImageFilter::m_ElapsedIterations {0}

Definition at line 286 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_InPlace

bool itk::simple::CannySegmentationLevelSetImageFilter::m_InPlace {false}

Definition at line 293 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_IsoSurfaceValue

double itk::simple::CannySegmentationLevelSetImageFilter::m_IsoSurfaceValue {0.0}

Definition at line 283 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_MaximumRMSError

double itk::simple::CannySegmentationLevelSetImageFilter::m_MaximumRMSError {0.02}

Definition at line 265 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_MemberFactory

std::unique_ptr<detail::MemberFunctionFactory<MemberFunctionType> > itk::simple::CannySegmentationLevelSetImageFilter::m_MemberFactory

Definition at line 257 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_NumberOfIterations

uint32_t itk::simple::CannySegmentationLevelSetImageFilter::m_NumberOfIterations {1000u}

Definition at line 277 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_PropagationScaling

double itk::simple::CannySegmentationLevelSetImageFilter::m_PropagationScaling {1.0}

Definition at line 268 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_ReverseExpansionDirection

bool itk::simple::CannySegmentationLevelSetImageFilter::m_ReverseExpansionDirection {false}

Definition at line 280 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_RMSChange

double itk::simple::CannySegmentationLevelSetImageFilter::m_RMSChange {0.0}

Definition at line 288 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_Threshold

double itk::simple::CannySegmentationLevelSetImageFilter::m_Threshold {0.0}

Definition at line 260 of file sitkCannySegmentationLevelSetImageFilter.h.

◆ m_Variance

double itk::simple::CannySegmentationLevelSetImageFilter::m_Variance {0.0}

Definition at line 262 of file sitkCannySegmentationLevelSetImageFilter.h.

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