SimpleITK
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This filter is an implementation of a Canny edge detector for scalar-valued images. More...
#include <sitkCannyEdgeDetectionImageFilter.h>
Public Types | |
using | PixelIDTypeList = RealPixelIDTypeList |
using | Self = CannyEdgeDetectionImageFilter |
Public Types inherited from itk::simple::ImageFilter | |
using | Self = ImageFilter |
Public Types inherited from itk::simple::ProcessObject | |
using | Self = ProcessObject |
Public Member Functions | |
CannyEdgeDetectionImageFilter () | |
Image | Execute (const Image &image1) |
double | GetLowerThreshold () const |
std::vector< double > | GetMaximumError () const |
std::string | GetName () const |
double | GetUpperThreshold () const |
std::vector< double > | GetVariance () const |
Self & | SetLowerThreshold (double LowerThreshold) |
Set the lower threshold value for detected edges. More... | |
Self & | SetMaximumError (double value) |
Self & | SetMaximumError (std::vector< double > MaximumError) |
Self & | SetUpperThreshold (double UpperThreshold) |
Set the upper threshold value for detected edges. TODO: Document in the ITKv4 migration guide that the SetThreshold member function was removed from the CannyEdgeDetectionImageFilter , and that both UpperThreshold and LowerThreshold need to be set. To get the same results as with the SetThreshold method change "myfilter->SetThrehsold" to "myfilter->SetUpperThreshold", and add "myfilter->SetLowerThreshold(GetUpperThreshold()/2.0)". More... | |
Self & | SetVariance (double value) |
Self & | SetVariance (std::vector< double > Variance) |
std::string | ToString () const |
virtual | ~CannyEdgeDetectionImageFilter () |
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 &image1) |
Private Member Functions | |
template<class TImageType > | |
Image | ExecuteInternal (const Image &image1) |
Private Attributes | |
double | m_LowerThreshold {0.0} |
std::vector< double > | m_MaximumError {std::vector<double>(3, 0.01)} |
std::unique_ptr< detail::MemberFunctionFactory< MemberFunctionType > > | m_MemberFactory |
double | m_UpperThreshold {0.0} |
std::vector< double > | m_Variance {std::vector<double>(3, 0.0)} |
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 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::ProcessObject * | GetActiveProcess () |
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 | |
NonCopyable & | operator= (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::EventObject & | GetITKEventObject (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) |
This filter is an implementation of a Canny edge detector for scalar-valued images.
Based on John Canny's paper "A Computational Approach to Edge Detection"(IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. PAMI-8, No.6, November 1986), there are four major steps used in the edge-detection scheme: (1) Smooth the input image with Gaussian filter. (2) Calculate the second directional derivatives of the smoothed image. (3) Non-Maximum Suppression: the zero-crossings of 2nd derivative are found, and the sign of third derivative is used to find the correct extrema. (4) The hysteresis thresholding is applied to the gradient magnitude (multiplied with zero-crossings) of the smoothed image to find and link edges.
TodoEdge-linking will be added when an itk connected component labeling algorithm is available.
Definition at line 70 of file sitkCannyEdgeDetectionImageFilter.h.
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Setup for member function dispatching
Definition at line 145 of file sitkCannyEdgeDetectionImageFilter.h.
Define the pixels types supported by this filter
Definition at line 82 of file sitkCannyEdgeDetectionImageFilter.h.
Definition at line 72 of file sitkCannyEdgeDetectionImageFilter.h.
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Destructor
itk::simple::CannyEdgeDetectionImageFilter::CannyEdgeDetectionImageFilter | ( | ) |
Default Constructor that takes no arguments and initializes default parameters
Execute the filter on the input image
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Definition at line 92 of file sitkCannyEdgeDetectionImageFilter.h.
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Set/Get the maximum error of the Gaussian smoothing kernel in each dimensional direction.
Definition at line 128 of file sitkCannyEdgeDetectionImageFilter.h.
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Name of this class
Implements itk::simple::ProcessObject.
Definition at line 131 of file sitkCannyEdgeDetectionImageFilter.h.
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Definition at line 102 of file sitkCannyEdgeDetectionImageFilter.h.
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Set/Get the variance of the Gaussian smoothing filter.
Definition at line 115 of file sitkCannyEdgeDetectionImageFilter.h.
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Set the lower threshold value for detected edges.
Definition at line 88 of file sitkCannyEdgeDetectionImageFilter.h.
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Set the values of the MaximumError vector all to value
Definition at line 123 of file sitkCannyEdgeDetectionImageFilter.h.
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Set/Get the MaximumError parameter used by the Gaussian smoothing filter in this algorithm
Definition at line 120 of file sitkCannyEdgeDetectionImageFilter.h.
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Set the upper threshold value for detected edges. TODO: Document in the ITKv4 migration guide that the SetThreshold member function was removed from the CannyEdgeDetectionImageFilter , and that both UpperThreshold and LowerThreshold need to be set. To get the same results as with the SetThreshold method change "myfilter->SetThrehsold" to "myfilter->SetUpperThreshold", and add "myfilter->SetLowerThreshold(GetUpperThreshold()/2.0)".
Definition at line 98 of file sitkCannyEdgeDetectionImageFilter.h.
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Set the values of the Variance vector all to value
Definition at line 110 of file sitkCannyEdgeDetectionImageFilter.h.
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Set/Get the variance of the Gaussian smoothing filter.
Definition at line 107 of file sitkCannyEdgeDetectionImageFilter.h.
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Print ourselves out
Reimplemented from itk::simple::ProcessObject.
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Definition at line 149 of file sitkCannyEdgeDetectionImageFilter.h.
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Definition at line 154 of file sitkCannyEdgeDetectionImageFilter.h.
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Definition at line 162 of file sitkCannyEdgeDetectionImageFilter.h.
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Definition at line 151 of file sitkCannyEdgeDetectionImageFilter.h.
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Definition at line 156 of file sitkCannyEdgeDetectionImageFilter.h.
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Definition at line 159 of file sitkCannyEdgeDetectionImageFilter.h.