otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep > Class Template Reference

#include <otbHistogramOfOrientedGradientCovariantImageFunction.h>

Inheritance diagram for otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >:

Collaboration diagram for otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >:

Public Types
typedef itk::SmartPointer< const Self >	ConstPointer
typedef Superclass::ContinuousIndexType	ContinuousIndexType
typedef TCoordRep	CoordRepType
typedef Superclass::IndexType	IndexType
typedef TInputImage	InputImageType
typedef InputImageType::PixelType	InputPixelType
typedef TOutputPrecision	OutputPrecisionType
typedef Superclass::OutputType	OutputType
typedef itk::SmartPointer< Self >	Pointer
typedef Superclass::PointType	PointType
typedef HistogramOfOrientedGradientCovariantImageFunction	Self
typedef itk::ImageFunction< TInputImage, std::vector< std::vector< TOutputPrecision > >, TCoordRep >	Superclass

Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
OutputType	EvaluateAtIndex (const IndexType &index) const override
virtual const char *	GetNameOfClass () const

Static Public Member Functions
static Pointer	New ()

Static Public Attributes
static const unsigned int	ImageDimension = InputImageType::ImageDimension
unsigned int	m_NeighborhoodRadius
unsigned int	m_NumberOfOrientationBins
OutputType	Evaluate (const PointType &point) const override
OutputType	EvaluateAtContinuousIndex (const ContinuousIndexType &cindex) const override
virtual void	SetNeighborhoodRadius (unsigned int _arg)
virtual const unsigned int &	GetNeighborhoodRadius () const
virtual void	SetNumberOfOrientationBins (unsigned int _arg)
virtual const unsigned int &	GetNumberOfOrientationBins () const
	HistogramOfOrientedGradientCovariantImageFunction ()
	~HistogramOfOrientedGradientCovariantImageFunction () override
void	PrintSelf (std::ostream &os, itk::Indent indent) const override
	HistogramOfOrientedGradientCovariantImageFunction (const Self &)=delete
void	operator= (const Self &)=delete

Detailed Description

template<class TInputImage, class TOutputPrecision = double, class TCoordRep = double>
class otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >

Calculate the centered HOG features.

This filter implements the centered histogram of gradient feature. It expects a gradient covariant image as input, such as the output of the itk::GradientImageFilter. Steps of the algorithm are as follows.

In order to make the C-HOG descriptor rotation-invariant, a principal gradient orientation is first looked for. Within the m_NeighborhoodRadius ($r$), an histogram of the local orientation is computed with m_NumberOfOrientationBins bins. Values cumulated in this histogram are the gradient magnitude weighted by a gaussian kernel of $\sigma = 0.5 * r$.

From this orientation histogram, the principal orientation is computed by looking for the maximum valued bin.

Once principal orientation is computed, gradient magnitude values weighted by the gaussian kernel are cumulated in five different histograms corresponding to five distinct spatial areas : the center area (radius of the center area is computed using $r_{c}=log_{2}(r)$), and the upper-left, upper-right, lower-left and lower-right radial areas. Orientation of these radial areas is shifted to match the principal orientation, and gradient orientations to determine histogram bins are also compensated with the principal orientation. Last, each histogram is normalized by its $L_2$ norm, ensuring that they all lie in the range $[0, 1]$.

This class is templated over the input image type, the output precision (e.g. float or double) and the coordinate representation type (e.g. float or double).

Definition at line 71 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

Member Typedef Documentation

ConstPointer

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef itk::SmartPointer<const Self> otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::ConstPointer

Definition at line 79 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

ContinuousIndexType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef Superclass::ContinuousIndexType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::ContinuousIndexType

Definition at line 91 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

CoordRepType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef TCoordRep otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::CoordRepType

Definition at line 97 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

IndexType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef Superclass::IndexType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::IndexType

Definition at line 90 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

InputImageType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef TInputImage otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::InputImageType

InputImageType typedef support.

Definition at line 85 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

InputPixelType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef InputImageType::PixelType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::InputPixelType

Definition at line 89 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

OutputPrecisionType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef TOutputPrecision otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::OutputPrecisionType

Definition at line 94 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

OutputType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef Superclass::OutputType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::OutputType

Definition at line 95 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

Pointer

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef itk::SmartPointer<Self> otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::Pointer

Definition at line 78 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

PointType

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef Superclass::PointType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::PointType

Definition at line 92 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

Self

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef HistogramOfOrientedGradientCovariantImageFunction otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::Self

Standard class typedefs.

Definition at line 76 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

Superclass

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

typedef itk::ImageFunction<TInputImage, std::vector<std::vector<TOutputPrecision> >, TCoordRep> otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::Superclass

Definition at line 77 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

Constructor & Destructor Documentation

HistogramOfOrientedGradientCovariantImageFunction() [1/2]

template<class TInputImage , class TOutputPrecision , class TCoordRep >

otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::HistogramOfOrientedGradientCovariantImageFunction

protected

Constructor

Definition at line 36 of file otbHistogramOfOrientedGradientCovariantImageFunction.hxx.

~HistogramOfOrientedGradientCovariantImageFunction()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::~HistogramOfOrientedGradientCovariantImageFunction ( )

inlineoverrideprotected

Evaluate the function at non-integer positions

Definition at line 136 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

HistogramOfOrientedGradientCovariantImageFunction() [2/2]

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::HistogramOfOrientedGradientCovariantImageFunction ( const Self &  )

privatedelete

Evaluate the function at non-integer positions

Member Function Documentation

CreateAnother()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

virtual::itk::LightObject::Pointer otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::CreateAnother

(

void

)

const

Evaluate()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

OutputType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::Evaluate ( const PointType &  point ) const

inlineoverride

Evaluate the function at non-integer positions

Definition at line 106 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

EvaluateAtContinuousIndex()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

OutputType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::EvaluateAtContinuousIndex ( const ContinuousIndexType &  cindex ) const

inlineoverride

Evaluate the function at non-integer positions

Definition at line 112 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

EvaluateAtIndex()

template<class TInputImage , class TOutputPrecision , class TCoordRep >

HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::OutputType otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::EvaluateAtIndex ( const IndexType &  index ) const

override

Evalulate the function at specified index

Definition at line 50 of file otbHistogramOfOrientedGradientCovariantImageFunction.hxx.

References otb::CONST_2PI, otb::CONST_PI, and otb::CONST_PI_2.

GetNameOfClass()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

virtual const char* otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

GetNeighborhoodRadius()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

virtual const unsigned int& otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::GetNeighborhoodRadius ( ) const

virtual

Evaluate the function at non-integer positions

GetNumberOfOrientationBins()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

virtual const unsigned int& otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::GetNumberOfOrientationBins ( ) const

virtual

Evaluate the function at non-integer positions

New()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

static Pointer otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::New ( )

static

Method for creation through the object factory.

operator=()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

void otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::operator= ( const Self &  )

privatedelete

Evaluate the function at non-integer positions

PrintSelf()

template<class TInputImage , class TOutputPrecision , class TCoordRep >

void otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::PrintSelf ( std::ostream &  os, itk::Indent  indent  ) const

overrideprotected

Evaluate the function at non-integer positions

Definition at line 42 of file otbHistogramOfOrientedGradientCovariantImageFunction.hxx.

SetNeighborhoodRadius()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

virtual void otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::SetNeighborhoodRadius ( unsigned int  _arg )

virtual

Get/Set the radius of the neighborhood over which the statistics are evaluated

SetNumberOfOrientationBins()

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

virtual void otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::SetNumberOfOrientationBins ( unsigned int  _arg )

virtual

Get/Set the number of bins of the orientation histograms

Member Data Documentation

ImageDimension

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

const unsigned int otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::ImageDimension = InputImageType::ImageDimension

static

Dimension of the underlying image.

Definition at line 100 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

m_NeighborhoodRadius

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

unsigned int otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::m_NeighborhoodRadius

private

Evaluate the function at non-integer positions

Definition at line 146 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

m_NumberOfOrientationBins

template<class TInputImage , class TOutputPrecision = double, class TCoordRep = double>

unsigned int otb::HistogramOfOrientedGradientCovariantImageFunction< TInputImage, TOutputPrecision, TCoordRep >::m_NumberOfOrientationBins

private

Evaluate the function at non-integer positions

Definition at line 149 of file otbHistogramOfOrientedGradientCovariantImageFunction.h.

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

• otbHistogramOfOrientedGradientCovariantImageFunction.h
• otbHistogramOfOrientedGradientCovariantImageFunction.hxx