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

#include <itkVectorGradientMagnitudeImageFilter.h>

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

Detailed Description

template<typename TInputImage, typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
class itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >

Computes a scalar, gradient magnitude image from a multiple channel (pixels are vectors) input.

Overview
This filter has two calculation modes. The first (default) mode calculates gradient magnitude as the difference between the largest two eigenvalues in a principle component analysis of the partial derivatives [1]. The gradient is then based on the direction of maximal change, and is a characterization of how "elongated" the point-spread of the analysis is found to be.

The second, more heuristic, calculation mode finds gradient magnitude as the square-root of the sum of the * individual weighted vector component derivative sums squared. That is, * $ \mathbf{magnitude} = \left( \sum_{i=0}^n \sum_{j=0}^m \frac{\delta * \phi_j}{\delta \mathbf{x}_{i}}^2 \right)^{\frac{1}{2}} $, where $\phi_j$ * is the $j^{\mathbf{th}}$ channel of vector image $\phi$ of dimension $n$. * Weighting terms are applied to each vector component.

The second mode is computationally much faster than the first and has the advantage that it is automatically multi-threaded (some vnl functions used in the first mode are not thread-safe). The first mode, however, tends to give intuitively better results with less (or no) parameter tuning.

Template Parameters (Input and Output)
This filter has one required template parameter which defines the input image type. The pixel type of the input image is assumed to be a vector (e.g., itk::Vector, itk::RGBPixel, itk::FixedArray). The scalar type of the vector components must be castable to floating point. Instantiating with an image of RGBPixel<unsigned short>, for example, is allowed, but the filter will convert it to an image of Vector<float,3> for processing.

The second template parameter, TRealType, can be optionally specified to define the scalar numerical type used in calculations. This is the component type of the output image, which will be of itk::Vector<TRealType, N>, where N is the number of channels in the multiple component input image. The default type of TRealType is float. For extra precision, you may safely change this parameter to double.

The third template parameter is the output image type. The third parameter will be automatically constructed from the first and second parameters, so it is not necessary (or advisable) to set this parameter explicitly. Given an M-channel input image with dimensionality N, and a numerical type specified as TRealType, the output image will be of type itk::Image<itk::Vector<TRealType, M>, N>.

Filter Parameters
The methods Set/GetUsePrincipleComponents and SetUsePrincipleComponentsOn/Off determine controls the calculation mode that is used.

The method SetUseImageSpacingOn will cause derivatives in the image to be scaled (inversely) with the pixel size of the input image, effectively taking derivatives in world coordinates (versus isotropic image space). SetUseImageSpacingOff turns this functionality off. Default is UseImageSpacingOn. The parameter UseImageSpacing can be set directly with the method SetUseImageSpacing(bool).

Weights can be applied to the derivatives directly using the SetDerivativeWeights method. Note that if UseImageSpacing is set to TRUE (ON), then these weights will be overridden by weights derived from the image spacing when the filter is updated. The argument to this method is a C array of TRealValue type.

Weights can be applied to each vector component of the image when the component derivative values are summed during computation. Specify these weights using the SetComponentWeights method. The argument to this method is a C array of TRealValue type.

Constraints
The filter requires an image with at least two dimensions and a vector length of at least 2. The theory supports extension to scalar images, but the implementation of the itk vector classes do not

The template parameter TRealType must be floating point (float or double) or a user-defined "real" numerical type with arithmetic operations defined sufficient to compute derivatives.

Performance
This filter will automatically multithread if run with SetUsePrincipleComponents=Off or on 3D data in UsePrincipleComponents=On mode. Unfortunately the ND eigen solver used is not thread safe (a special 3D solver is), so it cannot multithread for data other than 3D in UsePrincipleComponents=On mode.
References

[1] G. Sapiro and D. Ringach, "Anisotropic Diffusion of Multivalued Images with Application to Color Filtering," IEEE Transactions on Image Processing, Vol 5, No. 11 pp. 1582-1586, 1996

See Also
Image
Neighborhood
NeighborhoodOperator
NeighborhoodIterator
Examples:
Examples/IO/VisibleHumanPasteWrite.cxx, and Examples/Segmentation/WatershedSegmentation1.cxx.

Definition at line 139 of file itkVectorGradientMagnitudeImageFilter.h.

Public Types

typedef
ConstNeighborhoodIterator
< RealVectorImageType
ConstNeighborhoodIteratorType
 
typedef SmartPointer< const SelfConstPointer
 
typedef InputImageType::Pointer InputImagePointer
 
typedef TInputImage InputImageType
 
typedef TInputImage::PixelType InputPixelType
 
typedef OutputImageType::Pointer OutputImagePointer
 
typedef
Superclass::OutputImageRegionType 
OutputImageRegionType
 
typedef TOutputImage OutputImageType
 
typedef TOutputImage::PixelType OutputPixelType
 
typedef SmartPointer< SelfPointer
 
typedef
ConstNeighborhoodIteratorType::RadiusType 
RadiusType
 
typedef TRealType RealType
 
typedef Image< RealVectorType,
TInputImage::ImageDimension > 
RealVectorImageType
 
typedef Vector< TRealType,
InputPixelType::Dimension > 
RealVectorType
 
typedef
VectorGradientMagnitudeImageFilter 
Self
 
typedef ImageToImageFilter
< TInputImage, TOutputImage > 
Superclass
 
typedef FixedArray< TRealType,
VectorDimension
WeightsType
 
- 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 const char * GetNameOfClass () const
 
virtual bool GetUseImageSpacing () const
 
void SetUseImageSpacing (bool)
 
void SetUseImageSpacingOff ()
 
void SetUseImageSpacingOn ()
 
void SetUsePrincipleComponentsOff ()
 
virtual void SetDerivativeWeights (WeightsType _arg)
 
virtual const WeightsTypeGetDerivativeWeights () const
 
virtual void SetComponentWeights (WeightsType _arg)
 
virtual const WeightsTypeGetComponentWeights () const
 
virtual void SetUsePrincipleComponents (bool _arg)
 
virtual bool GetUsePrincipleComponents () const
 
void SetUsePrincipleComponentsOn ()
 
- 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 int CubicSolver (double *, double *)
 
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 = TOutputImage::ImageDimension
 
static const unsigned int VectorDimension = InputPixelType::Dimension
 
- 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 InputImageType::Superclass ImageBaseType
 
- 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

void BeforeThreadedGenerateData () override
 
TRealType EvaluateAtNeighborhood (const ConstNeighborhoodIteratorType &it) const
 
TRealType EvaluateAtNeighborhood3D (const ConstNeighborhoodIteratorType &it) const
 
virtual const ImageBaseTypeGetRealValuedInputImage () const
 
TRealType NonPCEvaluateAtNeighborhood (const ConstNeighborhoodIteratorType &it) const
 
void PrintSelf (std::ostream &os, Indent indent) const override
 
void ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId) override
 
 VectorGradientMagnitudeImageFilter ()
 
virtual ~VectorGradientMagnitudeImageFilter () 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 GenerateData () override
 
virtual const
ImageRegionSplitterBase
GetImageRegionSplitter () const
 
 ImageSource ()
 
virtual unsigned int SplitRequestedRegion (unsigned int i, unsigned int pieces, OutputImageRegionType &splitRegion)
 
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 ()
 

Protected Attributes

WeightsType m_ComponentWeights
 
WeightsType m_DerivativeWeights
 
WeightsType m_SqrtComponentWeights
 
- Protected Attributes inherited from itk::ProcessObject
TimeStamp m_OutputInformationMTime
 
bool m_Updating
 
- Protected Attributes inherited from itk::LightObject
AtomicInt< int > m_ReferenceCount
 

Private Attributes

ImageBaseType::ConstPointer m_RealValuedInputImage
 
ThreadIdType m_RequestedNumberOfThreads
 
bool m_UseImageSpacing
 
bool m_UsePrincipleComponents
 

Additional Inherited Members

- Static Protected Member Functions inherited from itk::ImageSource< TOutputImage >
static const
ImageRegionSplitterBase
GetGlobalDefaultSplitter ()
 
static ITK_THREAD_RETURN_TYPE ThreaderCallback (void *arg)
 

Member Typedef Documentation

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef ConstNeighborhoodIterator< RealVectorImageType > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::ConstNeighborhoodIteratorType

Type of the iterator that will be used to move through the image. Also the type which will be passed to the evaluate function

Definition at line 183 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef SmartPointer< const Self > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::ConstPointer

Definition at line 147 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef InputImageType::Superclass itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::ImageBaseType
protected

Definition at line 302 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef InputImageType::Pointer itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::InputImagePointer

Definition at line 163 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef TInputImage itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::InputImageType

Image typedef support

Definition at line 161 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef TInputImage::PixelType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::InputPixelType

Definition at line 158 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef OutputImageType::Pointer itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::OutputImagePointer

Definition at line 164 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef Superclass::OutputImageRegionType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::OutputImageRegionType

Superclass typedefs.

Definition at line 187 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef TOutputImage itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::OutputImageType

Definition at line 162 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef TOutputImage::PixelType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::OutputPixelType

Extract some information from the image types. Dimensionality of the two images is assumed to be the same.

Definition at line 153 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef SmartPointer< Self > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::Pointer

Definition at line 146 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef ConstNeighborhoodIteratorType::RadiusType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::RadiusType

Definition at line 184 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef TRealType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::RealType

Define the data type and the vector of data type used in calculations.

Definition at line 175 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef Image< RealVectorType, TInputImage::ImageDimension > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::RealVectorImageType

Definition at line 179 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef Vector< TRealType, InputPixelType::Dimension > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::RealVectorType

Definition at line 177 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef VectorGradientMagnitudeImageFilter itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::Self

Standard class typedefs.

Definition at line 144 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef ImageToImageFilter< TInputImage, TOutputImage > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::Superclass

Definition at line 145 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
typedef FixedArray< TRealType, VectorDimension > itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::WeightsType

Definition at line 216 of file itkVectorGradientMagnitudeImageFilter.h.

Constructor & Destructor Documentation

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::VectorGradientMagnitudeImageFilter ( )
protected
template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::~VectorGradientMagnitudeImageFilter ( )
inlineoverrideprotectedvirtual

Definition at line 279 of file itkVectorGradientMagnitudeImageFilter.h.

Member Function Documentation

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::BeforeThreadedGenerateData ( )
overrideprotectedvirtual

Do any necessary casting/copying of the input data. Input pixel types whose value types are not real number types must be cast to real number types.

Reimplemented from itk::ImageSource< TOutputImage >.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual::itk::LightObject::Pointer itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, 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 TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
static int itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::CubicSolver ( double *  ,
double *   
)
static

A specialized solver for finding the roots of a cubic polynomial. Necessary to multi-thread the 3D case

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
TRealType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::EvaluateAtNeighborhood ( const ConstNeighborhoodIteratorType it) const
inlineprotected
template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
TRealType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::EvaluateAtNeighborhood3D ( const ConstNeighborhoodIteratorType it) const
inlineprotected
template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GenerateInputRequestedRegion ( )
overridevirtual

VectorGradientMagnitudeImageFilter needs a larger input requested region than the output requested region (larger by the kernel size to calculate derivatives). As such, VectorGradientMagnitudeImageFilter 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 TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual const WeightsType& itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GetComponentWeights ( ) const
virtual

Set/Get the array of weightings for the different components of the vector. Default values are 1.0.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual const WeightsType& itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GetDerivativeWeights ( ) const
virtual

Directly Set/Get the array of weights used in the gradient calculations. Note that calling UseImageSpacingOn will clobber these values.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual const char* itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GetNameOfClass ( ) const
virtual

Run-time type information (and related methods)

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

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual const ImageBaseType* itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GetRealValuedInputImage ( ) const
protectedvirtual

Get access to the input image casted as real pixel values

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual bool itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GetUseImageSpacing ( ) const
virtual
template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual bool itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::GetUsePrincipleComponents ( ) const
virtual

Set/Get principle components calculation mode. When this is set to TRUE/ON, the gradient calculation will involve a priniciple component analysis of the partial derivatives of the color components. When this value is set to FALSE/OFF, the calculation is done as a square root of weighted sum of the derivatives squared. Default is UsePrincipleComponents = true.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
static Pointer itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::New ( )
static

Method for creation through the object factory.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
TRealType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::NonPCEvaluateAtNeighborhood ( const ConstNeighborhoodIteratorType it) const
inlineprotected
template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, 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 TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetComponentWeights ( WeightsType  _arg)
virtual

Set/Get the array of weightings for the different components of the vector. Default values are 1.0.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetDerivativeWeights ( WeightsType  _arg)
virtual

Directly Set/Get the array of weights used in the gradient calculations. Note that calling UseImageSpacingOn will clobber these values.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetUseImageSpacing ( bool  )

Set/Get whether or not the filter will use the spacing of the input image in its calculations

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetUseImageSpacingOff ( )
inline

Reset the derivative weights to ignore image spacing. Use this option if you want to calculate the gradient in the image space. Default is ImageSpacingOn.

Definition at line 209 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetUseImageSpacingOn ( )
inline

Set the derivative weights according to the spacing of the input image (1/spacing). Use this option if you want to calculate the gradient in the space in which the data was acquired. Default is ImageSpacingOn.

Definition at line 203 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
virtual void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetUsePrincipleComponents ( bool  _arg)
virtual

Set/Get principle components calculation mode. When this is set to TRUE/ON, the gradient calculation will involve a priniciple component analysis of the partial derivatives of the color components. When this value is set to FALSE/OFF, the calculation is done as a square root of weighted sum of the derivatives squared. Default is UsePrincipleComponents = true.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetUsePrincipleComponentsOff ( )
inline

Definition at line 259 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::SetUsePrincipleComponentsOn ( )
inline

Set/Get principle components calculation mode. When this is set to TRUE/ON, the gradient calculation will involve a priniciple component analysis of the partial derivatives of the color components. When this value is set to FALSE/OFF, the calculation is done as a square root of weighted sum of the derivatives squared. Default is UsePrincipleComponents = true.

Definition at line 253 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
void itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::ThreadedGenerateData ( const OutputImageRegionType outputRegionForThread,
ThreadIdType  threadId 
)
overrideprotectedvirtual

VectorGradientMagnitudeImageFilter can be implemented as a multithreaded filter. Therefore, this implementation provides a ThreadedGenerateData() routine which is called for each processing thread. The output image data is allocated automatically by the superclass prior to calling ThreadedGenerateData(). ThreadedGenerateData can only write to the portion of the output image specified by the parameter "outputRegionForThread"

See Also
ImageToImageFilter::ThreadedGenerateData(), ImageToImageFilter::GenerateData()

Reimplemented from itk::ImageSource< TOutputImage >.

Member Data Documentation

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
const unsigned int itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::ImageDimension = TOutputImage::ImageDimension
static

The dimensionality of the input and output images.

Definition at line 168 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
WeightsType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_ComponentWeights
protected

These weights are used to scale vector component values when they are combined to produce a scalar. The square root

Definition at line 484 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
WeightsType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_DerivativeWeights
protected

The weights used to scale derivatives during processing

Definition at line 479 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
ImageBaseType::ConstPointer itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_RealValuedInputImage
private

Definition at line 493 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
ThreadIdType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_RequestedNumberOfThreads
private

Definition at line 491 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
WeightsType itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_SqrtComponentWeights
protected

Definition at line 485 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
bool itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_UseImageSpacing
private

Definition at line 488 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
bool itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::m_UsePrincipleComponents
private

Definition at line 489 of file itkVectorGradientMagnitudeImageFilter.h.

template<typename TInputImage , typename TRealType = float, typename TOutputImage = Image< TRealType, TInputImage::ImageDimension >>
const unsigned int itk::VectorGradientMagnitudeImageFilter< TInputImage, TRealType, TOutputImage >::VectorDimension = InputPixelType::Dimension
static

Length of the vector pixel type of the input image.

Definition at line 172 of file itkVectorGradientMagnitudeImageFilter.h.


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