ITK  4.13.0
Insight Segmentation and Registration Toolkit
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itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage > Class Template Reference

#include <itkCannyEdgeDetectionImageFilter.h>

+ Inheritance diagram for itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >:
+ Collaboration diagram for itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >:

Detailed Description

template<typename TInputImage, typename TOutputImage>
class itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >

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.

Inputs and Outputs
The input to this filter should be a scalar, real-valued Itk image of arbitrary dimension. The output should also be a scalar, real-value Itk image of the same dimensionality.
Parameters
There are four parameters for this filter that control the sub-filters used by the algorithm.
Variance and Maximum error are used in the Gaussian smoothing of the input image. See itkDiscreteGaussianImageFilter for information on these parameters.
Threshold is the lowest allowed value in the output image. Its data type is the same as the data type of the output image. Any values below the Threshold level will be replaced with the OutsideValue parameter value, whose default is zero.
Todo:
Edge-linking will be added when an itk connected component labeling algorithm is available.
See Also
DiscreteGaussianImageFilter
ZeroCrossingImageFilter
ThresholdImageFilter
Examples:
Examples/Filtering/CannyEdgeDetectionImageFilter.cxx, and SphinxExamples/src/Filtering/ImageFeature/DetectEdgesWithCannyFilter/Code.cxx.

Definition at line 87 of file itkCannyEdgeDetectionImageFilter.h.

Classes

struct  CannyThreadStruct
 

Public Types

typedef FixedArray< double,
itkGetStaticConstMacro(ImageDimension) > 
ArrayType
 
typedef SmartPointer< const SelfConstPointer
 
typedef
ZeroFluxNeumannBoundaryCondition
< OutputImageType
DefaultBoundaryConditionType
 
typedef TInputImage::IndexType IndexType
 
typedef TInputImage::PixelType InputImagePixelType
 
typedef TInputImage::RegionType InputImageRegionType
 
typedef TInputImage InputImageType
 
typedef ObjectStore< ListNodeTypeListNodeStorageType
 
typedef ListNode< IndexTypeListNodeType
 
typedef ListType::Pointer ListPointerType
 
typedef SparseFieldLayer
< ListNodeType
ListType
 
typedef
ConstNeighborhoodIterator
< OutputImageType,
DefaultBoundaryConditionType
NeighborhoodType
 
typedef TOutputImage::PixelType OutputImagePixelType
 
typedef TOutputImage::RegionType OutputImageRegionType
 
typedef TOutputImage OutputImageType
 
typedef SmartPointer< SelfPointer
 
typedef
CannyEdgeDetectionImageFilter 
Self
 
typedef TInputImage::SizeValueType SizeValueType
 
typedef ImageToImageFilter
< TInputImage, TOutputImage > 
Superclass
 
- Public Types inherited from itk::ImageToImageFilter< TInputImage, TOutputImage >
typedef SmartPointer< const SelfConstPointer
 
typedef
InputImageType::ConstPointer 
InputImageConstPointer
 
typedef InputImageType::PixelType InputImagePixelType
 
typedef InputImageType::Pointer InputImagePointer
 
typedef InputImageType::RegionType InputImageRegionType
 
typedef TInputImage InputImageType
 
typedef
Superclass::OutputImagePixelType 
OutputImagePixelType
 
typedef
Superclass::OutputImageRegionType 
OutputImageRegionType
 
typedef SmartPointer< SelfPointer
 
typedef ImageToImageFilter Self
 
typedef ImageSource< TOutputImage > Superclass
 
- Public Types inherited from itk::ImageSource< TOutputImage >
typedef SmartPointer< const SelfConstPointer
 
typedef
Superclass::DataObjectIdentifierType 
DataObjectIdentifierType
 
typedef DataObject::Pointer DataObjectPointer
 
typedef
Superclass::DataObjectPointerArraySizeType 
DataObjectPointerArraySizeType
 
typedef OutputImageType::PixelType OutputImagePixelType
 
typedef OutputImageType::Pointer OutputImagePointer
 
typedef OutputImageType::RegionType OutputImageRegionType
 
typedef TOutputImage OutputImageType
 
typedef SmartPointer< SelfPointer
 
typedef ImageSource Self
 
typedef ProcessObject Superclass
 
- Public Types inherited from itk::ProcessObject
typedef SmartPointer< const SelfConstPointer
 
typedef
DataObject::DataObjectIdentifierType 
DataObjectIdentifierType
 
typedef DataObject::Pointer DataObjectPointer
 
typedef std::vector
< DataObjectPointer
DataObjectPointerArray
 
typedef
DataObjectPointerArray::size_type 
DataObjectPointerArraySizeType
 
typedef MultiThreader MultiThreaderType
 
typedef std::vector
< DataObjectIdentifierType
NameArray
 
typedef SmartPointer< SelfPointer
 
typedef ProcessObject Self
 
typedef Object Superclass
 
- Public Types inherited from itk::Object
typedef SmartPointer< const SelfConstPointer
 
typedef SmartPointer< SelfPointer
 
typedef Object Self
 
typedef LightObject Superclass
 
- Public Types inherited from itk::LightObject
typedef SmartPointer< const SelfConstPointer
 
typedef SmartPointer< SelfPointer
 
typedef LightObject Self
 

Public Member Functions

virtual ::itk::LightObject::Pointer CreateAnother () const
 
virtual void GenerateInputRequestedRegion () override
 
virtual OutputImagePixelType GetLowerThreshold () const
 
virtual const char * GetNameOfClass () const
 
OutputImageTypeGetNonMaximumSuppressionImage ()
 
virtual OutputImagePixelType GetUpperThreshold () const
 
virtual void SetLowerThreshold (OutputImagePixelType _arg)
 
virtual void SetUpperThreshold (OutputImagePixelType _arg)
 
virtual void SetVariance (ArrayType _arg)
 
virtual const ArrayType GetVariance () const
 
virtual void SetMaximumError (ArrayType _arg)
 
virtual const ArrayType GetMaximumError () const
 
void SetVariance (const typename ArrayType::ValueType v)
 
void SetMaximumError (const typename ArrayType::ValueType v)
 
- Public Member Functions inherited from itk::ImageToImageFilter< TInputImage, TOutputImage >
const InputImageTypeGetInput () const
 
const InputImageTypeGetInput (unsigned int idx) const
 
virtual void PopBackInput () override
 
virtual void PopFrontInput () override
 
virtual void PushBackInput (const InputImageType *image)
 
virtual void PushFrontInput (const InputImageType *image)
 
virtual void SetInput (const InputImageType *image)
 
virtual void SetInput (unsigned int, const TInputImage *image)
 
virtual void SetCoordinateTolerance (double _arg)
 
virtual double GetCoordinateTolerance () const
 
virtual void SetDirectionTolerance (double _arg)
 
virtual double GetDirectionTolerance () const
 
- Public Member Functions inherited from itk::ImageSource< TOutputImage >
OutputImageTypeGetOutput (unsigned int idx)
 
virtual void GraftNthOutput (unsigned int idx, DataObject *output)
 
virtual void GraftOutput (const DataObjectIdentifierType &key, DataObject *output)
 
OutputImageTypeGetOutput ()
 
const OutputImageTypeGetOutput () const
 
virtual void GraftOutput (DataObject *output)
 
virtual
ProcessObject::DataObjectPointer 
MakeOutput (ProcessObject::DataObjectPointerArraySizeType idx) override
 
virtual
ProcessObject::DataObjectPointer 
MakeOutput (const ProcessObject::DataObjectIdentifierType &) override
 
- Public Member Functions inherited from itk::ProcessObject
virtual void AbortGenerateDataOff ()
 
virtual void AbortGenerateDataOn ()
 
virtual void EnlargeOutputRequestedRegion (DataObject *)
 
virtual const bool & GetAbortGenerateData () const
 
DataObjectPointerArray GetIndexedInputs ()
 
DataObjectPointerArray GetIndexedOutputs ()
 
NameArray GetInputNames () const
 
DataObjectPointerArray GetInputs ()
 
MultiThreaderTypeGetMultiThreader () const
 
DataObjectPointerArraySizeType GetNumberOfIndexedInputs () const
 
DataObjectPointerArraySizeType GetNumberOfIndexedOutputs () const
 
DataObjectPointerArraySizeType GetNumberOfInputs () const
 
DataObjectPointerArraySizeType GetNumberOfOutputs () const
 
virtual
DataObjectPointerArraySizeType 
GetNumberOfValidRequiredInputs () const
 
NameArray GetOutputNames () const
 
DataObjectPointerArray GetOutputs ()
 
virtual const float & GetProgress () const
 
NameArray GetRequiredInputNames () const
 
bool HasInput (const DataObjectIdentifierType &key) const
 
bool HasOutput (const DataObjectIdentifierType &key) const
 
virtual void PrepareOutputs ()
 
virtual void PropagateRequestedRegion (DataObject *output)
 
virtual void ResetPipeline ()
 
virtual void SetAbortGenerateData (bool _arg)
 
virtual void Update ()
 
virtual void UpdateLargestPossibleRegion ()
 
virtual void UpdateOutputData (DataObject *output)
 
virtual void UpdateOutputInformation ()
 
void UpdateProgress (float progress)
 
void SetProgress (float progress)
 
virtual void SetReleaseDataFlag (bool flag)
 
virtual bool GetReleaseDataFlag () const
 
void ReleaseDataFlagOn ()
 
void ReleaseDataFlagOff ()
 
virtual void SetReleaseDataBeforeUpdateFlag (bool _arg)
 
virtual const bool & GetReleaseDataBeforeUpdateFlag () const
 
virtual void ReleaseDataBeforeUpdateFlagOn ()
 
virtual void ReleaseDataBeforeUpdateFlagOff ()
 
virtual void SetNumberOfThreads (ThreadIdType _arg)
 
virtual const ThreadIdTypeGetNumberOfThreads () const
 
- Public Member Functions inherited from itk::Object
unsigned long AddObserver (const EventObject &event, Command *)
 
unsigned long AddObserver (const EventObject &event, Command *) const
 
virtual void DebugOff () const
 
virtual void DebugOn () const
 
CommandGetCommand (unsigned long tag)
 
bool GetDebug () const
 
MetaDataDictionaryGetMetaDataDictionary ()
 
const MetaDataDictionaryGetMetaDataDictionary () const
 
virtual ModifiedTimeType GetMTime () const
 
virtual const TimeStampGetTimeStamp () const
 
bool HasObserver (const EventObject &event) const
 
void InvokeEvent (const EventObject &)
 
void InvokeEvent (const EventObject &) const
 
virtual void Modified () const
 
virtual void Register () const override
 
void RemoveAllObservers ()
 
void RemoveObserver (unsigned long tag)
 
void SetDebug (bool debugFlag) const
 
void SetMetaDataDictionary (const MetaDataDictionary &rhs)
 
virtual void SetReferenceCount (int) override
 
virtual void UnRegister () const noexceptoverride
 
virtual void SetObjectName (std::string _arg)
 
virtual const std::string & GetObjectName () const
 
- Public Member Functions inherited from itk::LightObject
virtual void Delete ()
 
virtual int GetReferenceCount () const
 
 itkCloneMacro (Self)
 
void Print (std::ostream &os, Indent indent=0) const
 

Static Public Member Functions

static Pointer New ()
 
- Static Public Member Functions inherited from itk::Object
static bool GetGlobalWarningDisplay ()
 
static void GlobalWarningDisplayOff ()
 
static void GlobalWarningDisplayOn ()
 
static Pointer New ()
 
static void SetGlobalWarningDisplay (bool flag)
 
- Static Public Member Functions inherited from itk::LightObject
static void BreakOnError ()
 
static Pointer New ()
 

Static Public Attributes

static const unsigned int ImageDimension = TInputImage::ImageDimension
 
static const unsigned int OutputImageDimension = TOutputImage::ImageDimension
 
- Static Public Attributes inherited from itk::ImageToImageFilter< TInputImage, TOutputImage >
static const unsigned int InputImageDimension = TInputImage::ImageDimension
 
static const unsigned int OutputImageDimension = TOutputImage::ImageDimension
 
- Static Public Attributes inherited from itk::ImageSource< TOutputImage >
static const unsigned int OutputImageDimension = TOutputImage::ImageDimension
 

Protected Types

typedef
DiscreteGaussianImageFilter
< InputImageType,
OutputImageType
GaussianImageFilterType
 
typedef MultiplyImageFilter
< OutputImageType,
OutputImageType,
OutputImageType
MultiplyImageFilterType
 
- Protected Types inherited from itk::ImageToImageFilter< TInputImage, TOutputImage >
typedef
ImageToImageFilterDetail::ImageRegionCopier
< itkGetStaticConstMacro(OutputImageDimension),
itkGetStaticConstMacro(InputImageDimension) > 
InputToOutputRegionCopierType
 
typedef
ImageToImageFilterDetail::ImageRegionCopier
< itkGetStaticConstMacro(InputImageDimension),
itkGetStaticConstMacro(OutputImageDimension) > 
OutputToInputRegionCopierType
 

Protected Member Functions

 CannyEdgeDetectionImageFilter ()
 
void GenerateData () override
 
void PrintSelf (std::ostream &os, Indent indent) const override
 
- Protected Member Functions inherited from itk::ImageToImageFilter< TInputImage, TOutputImage >
virtual void CallCopyInputRegionToOutputRegion (OutputImageRegionType &destRegion, const InputImageRegionType &srcRegion)
 
virtual void CallCopyOutputRegionToInputRegion (InputImageRegionType &destRegion, const OutputImageRegionType &srcRegion)
 
 ImageToImageFilter ()
 
virtual void VerifyInputInformation () override
 
 ~ImageToImageFilter () override
 
void PushBackInput (const DataObject *input) override
 
void PushFrontInput (const DataObject *input) override
 
- Protected Member Functions inherited from itk::ImageSource< TOutputImage >
virtual void AfterThreadedGenerateData ()
 
virtual void AllocateOutputs ()
 
virtual void BeforeThreadedGenerateData ()
 
virtual const
ImageRegionSplitterBase
GetImageRegionSplitter () const
 
 ImageSource ()
 
virtual unsigned int SplitRequestedRegion (unsigned int i, unsigned int pieces, OutputImageRegionType &splitRegion)
 
virtual void ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId)
 
virtual ~ImageSource () override
 
- Protected Member Functions inherited from itk::ProcessObject
virtual void AddInput (DataObject *input)
 
void AddOptionalInputName (const DataObjectIdentifierType &)
 
void AddOptionalInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx)
 
virtual void AddOutput (DataObject *output)
 
bool AddRequiredInputName (const DataObjectIdentifierType &)
 
bool AddRequiredInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx)
 
virtual void CacheInputReleaseDataFlags ()
 
virtual void GenerateOutputInformation ()
 
virtual void GenerateOutputRequestedRegion (DataObject *output)
 
DataObjectGetInput (const DataObjectIdentifierType &key)
 
const DataObjectGetInput (const DataObjectIdentifierType &key) const
 
virtual const
DataObjectPointerArraySizeType
GetNumberOfRequiredInputs () const
 
virtual const
DataObjectPointerArraySizeType
GetNumberOfRequiredOutputs () const
 
bool IsIndexedInputName (const DataObjectIdentifierType &) const
 
bool IsIndexedOutputName (const DataObjectIdentifierType &) const
 
bool IsRequiredInputName (const DataObjectIdentifierType &) const
 
 itkLegacyMacro (virtual void RemoveOutput(DataObject *output))
 
 itkLegacyMacro (void SetNumberOfOutputs(DataObjectPointerArraySizeType num))
 
 itkLegacyMacro (virtual void RemoveInput(DataObject *input))
 
 itkLegacyMacro (void SetNumberOfInputs(DataObjectPointerArraySizeType num))
 
DataObjectPointerArraySizeType MakeIndexFromInputName (const DataObjectIdentifierType &name) const
 
DataObjectPointerArraySizeType MakeIndexFromOutputName (const DataObjectIdentifierType &name) const
 
DataObjectIdentifierType MakeNameFromInputIndex (DataObjectPointerArraySizeType idx) const
 
DataObjectIdentifierType MakeNameFromOutputIndex (DataObjectPointerArraySizeType idx) const
 
 ProcessObject ()
 
virtual void PropagateResetPipeline ()
 
virtual void ReleaseInputs ()
 
virtual void RemoveInput (const DataObjectIdentifierType &key)
 
virtual void RemoveInput (DataObjectPointerArraySizeType)
 
virtual void RemoveOutput (const DataObjectIdentifierType &key)
 
virtual void RemoveOutput (DataObjectPointerArraySizeType idx)
 
bool RemoveRequiredInputName (const DataObjectIdentifierType &)
 
virtual void RestoreInputReleaseDataFlags ()
 
virtual void SetInput (const DataObjectIdentifierType &key, DataObject *input)
 
virtual void SetNthInput (DataObjectPointerArraySizeType num, DataObject *input)
 
virtual void SetNthOutput (DataObjectPointerArraySizeType num, DataObject *output)
 
void SetNumberOfIndexedInputs (DataObjectPointerArraySizeType num)
 
void SetNumberOfIndexedOutputs (DataObjectPointerArraySizeType num)
 
virtual void SetNumberOfRequiredInputs (DataObjectPointerArraySizeType)
 
virtual void SetNumberOfRequiredOutputs (DataObjectPointerArraySizeType _arg)
 
virtual void SetOutput (const DataObjectIdentifierType &key, DataObject *output)
 
virtual void SetPrimaryInput (DataObject *input)
 
virtual void SetPrimaryOutput (DataObject *output)
 
void SetRequiredInputNames (const NameArray &)
 
virtual void VerifyPreconditions ()
 
 ~ProcessObject () override
 
DataObjectGetInput (DataObjectPointerArraySizeType idx)
 
const DataObjectGetInput (DataObjectPointerArraySizeType idx) const
 
DataObjectGetPrimaryInput ()
 
const DataObjectGetPrimaryInput () const
 
virtual void SetPrimaryInputName (const DataObjectIdentifierType &key)
 
virtual const char * GetPrimaryInputName (void) const
 
DataObjectGetOutput (const DataObjectIdentifierType &key)
 
const DataObjectGetOutput (const DataObjectIdentifierType &key) const
 
virtual void SetPrimaryOutputName (const DataObjectIdentifierType &key)
 
virtual const char * GetPrimaryOutputName (void) const
 
DataObjectGetOutput (DataObjectPointerArraySizeType idx)
 
const DataObjectGetOutput (DataObjectPointerArraySizeType idx) const
 
DataObjectGetPrimaryOutput ()
 
const DataObjectGetPrimaryOutput () const
 
- Protected Member Functions inherited from itk::Object
 Object ()
 
bool PrintObservers (std::ostream &os, Indent indent) const
 
virtual void SetTimeStamp (const TimeStamp &time)
 
virtual ~Object () override
 
- Protected Member Functions inherited from itk::LightObject
virtual LightObject::Pointer InternalClone () const
 
 LightObject ()
 
virtual void PrintHeader (std::ostream &os, Indent indent) const
 
virtual void PrintTrailer (std::ostream &os, Indent indent) const
 
virtual ~LightObject ()
 

Private Member Functions

void AllocateUpdateBuffer ()
 
void Compute2ndDerivative ()
 
void Compute2ndDerivativePos ()
 
OutputImagePixelType ComputeCannyEdge (const NeighborhoodType &it, void *globalData)
 
void FollowEdge (IndexType index, const OutputImageType *multiplyImageFilterOutput)
 
void HysteresisThresholding ()
 
void ThreadedCompute2ndDerivative (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId)
 
void ThreadedCompute2ndDerivativePos (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId)
 
virtual ~CannyEdgeDetectionImageFilter () override
 

Static Private Member Functions

static ITK_THREAD_RETURN_TYPE Compute2ndDerivativePosThreaderCallback (void *arg)
 
static ITK_THREAD_RETURN_TYPE Compute2ndDerivativeThreaderCallback (void *arg)
 

Private Attributes

SizeValueType m_Center
 
std::slice m_ComputeCannyEdgeSlice [ImageDimension]
 
GaussianImageFilterType::Pointer m_GaussianFilter
 
OutputImagePixelType m_LowerThreshold
 
ArrayType m_MaximumError
 
MultiplyImageFilterType::Pointer m_MultiplyImageFilter
 
ListPointerType m_NodeList
 
ListNodeStorageType::Pointer m_NodeStore
 
OutputImageTypem_OutputImage
 
SizeValueType m_Stride [ImageDimension]
 
OutputImageType::Pointer m_UpdateBuffer1
 
OutputImagePixelType m_UpperThreshold
 
ArrayType m_Variance
 
DerivativeOperator
< OutputImagePixelType,
itkGetStaticConstMacro(ImageDimension) > 
m_ComputeCannyEdge1stDerivativeOper
 
DerivativeOperator
< OutputImagePixelType,
itkGetStaticConstMacro(ImageDimension) > 
m_ComputeCannyEdge2ndDerivativeOper
 

Additional Inherited Members

- Static Protected Member Functions inherited from itk::ImageSource< TOutputImage >
static const
ImageRegionSplitterBase
GetGlobalDefaultSplitter ()
 
static ITK_THREAD_RETURN_TYPE ThreaderCallback (void *arg)
 
- Protected Attributes inherited from itk::ProcessObject
TimeStamp m_OutputInformationMTime
 
bool m_Updating
 
- Protected Attributes inherited from itk::LightObject
AtomicInt< int > m_ReferenceCount
 

Member Typedef Documentation

template<typename TInputImage, typename TOutputImage>
typedef FixedArray< double, itkGetStaticConstMacro(ImageDimension) > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ArrayType

Typedef of double containers.

Definition at line 143 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef SmartPointer< const Self > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ConstPointer

Definition at line 101 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef ZeroFluxNeumannBoundaryCondition< OutputImageType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::DefaultBoundaryConditionType

The default boundary condition is used unless overridden in the Evaluate() method.

Definition at line 112 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef DiscreteGaussianImageFilter< InputImageType, OutputImageType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GaussianImageFilterType
protected

Definition at line 239 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TInputImage::IndexType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::IndexType

Definition at line 106 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TInputImage::PixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::InputImagePixelType

Define pixel types.

Definition at line 104 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TInputImage::RegionType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::InputImageRegionType

Definition at line 130 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TInputImage itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::InputImageType

Image typedef support

Definition at line 96 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef ObjectStore< ListNodeType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ListNodeStorageType

Definition at line 121 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef ListNode< IndexType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ListNodeType

Definition at line 120 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef ListType::Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ListPointerType

Definition at line 123 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef SparseFieldLayer< ListNodeType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ListType

Definition at line 122 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef MultiplyImageFilter< OutputImageType, OutputImageType, OutputImageType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::MultiplyImageFilterType
protected

Definition at line 241 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef ConstNeighborhoodIterator< OutputImageType, DefaultBoundaryConditionType > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::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.

Definition at line 118 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TOutputImage::PixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::OutputImagePixelType

Definition at line 105 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TOutputImage::RegionType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::OutputImageRegionType

Typedef to describe the output image region type.

Definition at line 126 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TOutputImage itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::OutputImageType

Definition at line 97 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef SmartPointer< Self > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Pointer

SmartPointer typedef support

Definition at line 100 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef CannyEdgeDetectionImageFilter itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Self

Standard "Self" & Superclass typedef.

Definition at line 92 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef TInputImage::SizeValueType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SizeValueType

Definition at line 107 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
typedef ImageToImageFilter< TInputImage, TOutputImage > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Superclass

Definition at line 93 of file itkCannyEdgeDetectionImageFilter.h.

Constructor & Destructor Documentation

template<typename TInputImage, typename TOutputImage>
itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::CannyEdgeDetectionImageFilter ( )
protected
template<typename TInputImage, typename TOutputImage>
virtual itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::~CannyEdgeDetectionImageFilter ( )
inlineoverrideprivatevirtual

Definition at line 246 of file itkCannyEdgeDetectionImageFilter.h.

Member Function Documentation

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::AllocateUpdateBuffer ( )
private

Allocate storage for update buffers used during calculation of multiple steps.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Compute2ndDerivative ( )
private

Calculate the second derivative of the smoothed image, it writes the result to the update buffer using the ThreadedCompute2ndDerivative() method and multithreading mechanism.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Compute2ndDerivativePos ( )
private

Calculate the gradient of the second derivative of the smoothed image, it writes the result to m_UpdateBuffer1 using the ThreadedCompute2ndDerivativePos() method and multithreading mechanism.

template<typename TInputImage, typename TOutputImage>
static ITK_THREAD_RETURN_TYPE itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Compute2ndDerivativePosThreaderCallback ( void *  arg)
staticprivate

This callback method uses ImageSource::SplitRequestedRegion to acquire an output region that it passes to ThreadedCompute2ndDerivative for processing.

template<typename TInputImage, typename TOutputImage>
static ITK_THREAD_RETURN_TYPE itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::Compute2ndDerivativeThreaderCallback ( void *  arg)
staticprivate

This callback method uses ImageSource::SplitRequestedRegion to acquire an output region that it passes to ThreadedCompute2ndDerivative for processing.

template<typename TInputImage, typename TOutputImage>
OutputImagePixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ComputeCannyEdge ( const NeighborhoodType it,
void *  globalData 
)
private

This method is used to calculate the 2nd derivative for non-boundary pixels. It is called by the ThreadedCompute2ndDerivative method.

template<typename TInputImage, typename TOutputImage>
virtual::itk::LightObject::Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::CreateAnother ( ) 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::Object.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::FollowEdge ( IndexType  index,
const OutputImageType multiplyImageFilterOutput 
)
private

Edge linking function.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GenerateData ( )
overrideprotectedvirtual

A version of GenerateData() specific for image processing filters. This implementation will split the processing across multiple threads. The buffer is allocated by this method. Then the BeforeThreadedGenerateData() method is called (if provided). Then, a series of threads are spawned each calling ThreadedGenerateData(). After all the threads have completed processing, the AfterThreadedGenerateData() method is called (if provided). If an image processing filter cannot be threaded, the filter should provide an implementation of GenerateData(). That implementation is responsible for allocating the output buffer. If a filter an be threaded, it should NOT provide a GenerateData() method but should provide a ThreadedGenerateData() instead.

See Also
ThreadedGenerateData()

Reimplemented from itk::ImageSource< TOutputImage >.

template<typename TInputImage, typename TOutputImage>
virtual void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GenerateInputRequestedRegion ( )
overridevirtual

CannyEdgeDetectionImageFilter needs a larger input requested region than the output requested region ( derivative operators, etc). As such, CannyEdgeDetectionImageFilter needs to provide an implementation for GenerateInputRequestedRegion() in order to inform the pipeline execution model.

See Also
ImageToImageFilter::GenerateInputRequestedRegion()

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

template<typename TInputImage, typename TOutputImage>
virtual OutputImagePixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GetLowerThreshold ( ) const
virtual
template<typename TInputImage, typename TOutputImage>
virtual const ArrayType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GetMaximumError ( ) const
virtual

Set/Get the maximum error of the Gaussian smoothing kernel in each dimensional direction.

template<typename TInputImage, typename TOutputImage>
virtual const char* itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GetNameOfClass ( ) const
virtual

Run-time type information (and related methods).

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

template<typename TInputImage, typename TOutputImage>
OutputImageType* itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GetNonMaximumSuppressionImage ( )
inline

Definition at line 203 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
virtual OutputImagePixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GetUpperThreshold ( ) const
virtual
template<typename TInputImage, typename TOutputImage>
virtual const ArrayType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::GetVariance ( ) const
virtual

Set/Get the variance of the Gaussian smoothing filter.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::HysteresisThresholding ( )
private

Implement hysteresis thresholding.

template<typename TInputImage, typename TOutputImage>
static Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::New ( )
static
template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::PrintSelf ( std::ostream &  os,
Indent  indent 
) const
overrideprotectedvirtual

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::ImageToImageFilter< TInputImage, TOutputImage >.

template<typename TInputImage, typename TOutputImage>
virtual void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SetLowerThreshold ( OutputImagePixelType  _arg)
virtual
template<typename TInputImage, typename TOutputImage>
virtual void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SetMaximumError ( ArrayType  _arg)
virtual

Set/Get the maximum error of the Gaussian smoothing kernel in each dimensional direction.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SetMaximumError ( const typename ArrayType::ValueType  v)
inline

Set/Get the MaximumError parameter used by the Gaussian smoothing filter in this algorithm

Definition at line 173 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
virtual void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SetUpperThreshold ( OutputImagePixelType  _arg)
virtual

Set the 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)"

template<typename TInputImage, typename TOutputImage>
virtual void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SetVariance ( ArrayType  _arg)
virtual

Set/Get the variance of the Gaussian smoothing filter.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::SetVariance ( const typename ArrayType::ValueType  v)
inline

Set/Get the variance of the Gaussian smoothing filter.

Definition at line 157 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ThreadedCompute2ndDerivative ( const OutputImageRegionType outputRegionForThread,
ThreadIdType  threadId 
)
private

Split the input into "num" pieces, returning region "i" as "splitRegion". This method is called "num" times to return non-overlapping regions. The method returns the number of pieces that the input can be split into by the routine. i.e. return value is less than or equal to "num".

See Also
ImageSourceDoes the actual work of calculating of the 2nd derivative over a region supplied by the multithreading mechanism.
Compute2ndDerivative
Compute2ndDerivativeThreaderCallBack
template<typename TInputImage, typename TOutputImage>
void itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ThreadedCompute2ndDerivativePos ( const OutputImageRegionType outputRegionForThread,
ThreadIdType  threadId 
)
private

Does the actual work of calculating of the 2nd derivative over a region supplied by the multithreading mechanism.

See Also
Compute2ndDerivativePos
Compute3ndDerivativePosThreaderCallBack

Member Data Documentation

template<typename TInputImage, typename TOutputImage>
const unsigned int itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::ImageDimension = TInputImage::ImageDimension
static

ImageDimension constant.

Definition at line 137 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
SizeValueType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_Center
private

Definition at line 347 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
DerivativeOperator< OutputImagePixelType, itkGetStaticConstMacro(ImageDimension) > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_ComputeCannyEdge1stDerivativeOper
private

Function objects that are used in the inner loops of derivatiVex calculations.

Definition at line 339 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
DerivativeOperator< OutputImagePixelType, itkGetStaticConstMacro(ImageDimension) > itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_ComputeCannyEdge2ndDerivativeOper
private

Function objects that are used in the inner loops of derivatiVex calculations.

Definition at line 341 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
std::slice itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_ComputeCannyEdgeSlice[ImageDimension]
private

Definition at line 344 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
GaussianImageFilterType::Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_GaussianFilter
private

Gaussian filter to smooth the input image.

Definition at line 330 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
OutputImagePixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_LowerThreshold
private

Definition at line 325 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
ArrayType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_MaximumError
private

Definition at line 321 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
MultiplyImageFilterType::Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_MultiplyImageFilter
private

Multiply image filter to multiply with the zero crossings of the second derivative.

Definition at line 334 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
ListPointerType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_NodeList
private

Definition at line 350 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
ListNodeStorageType::Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_NodeStore
private

Definition at line 349 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
OutputImageType* itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_OutputImage
private

Definition at line 352 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
SizeValueType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_Stride[ImageDimension]
private

Definition at line 346 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
OutputImageType::Pointer itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_UpdateBuffer1
private

Definition at line 327 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
OutputImagePixelType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_UpperThreshold
private

Definition at line 323 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
ArrayType itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::m_Variance
private

Definition at line 319 of file itkCannyEdgeDetectionImageFilter.h.

template<typename TInputImage, typename TOutputImage>
const unsigned int itk::CannyEdgeDetectionImageFilter< TInputImage, TOutputImage >::OutputImageDimension = TOutputImage::ImageDimension
static

ImageDimension constant.

Definition at line 139 of file itkCannyEdgeDetectionImageFilter.h.


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