HistogramOfGradients Class Reference

Inheritance diagram for HistogramOfGradients:

Collaboration diagram for HistogramOfGradients:

Public Member Functions
	HistogramOfGradients (bool normalize=true, Dims cellDims=Dims(8, 8), bool fixedCells=false, int numOrientations=9, bool signedOrient=false)
	Constructor.
virtual HistogramOfGradients *	clone ()
virtual	~HistogramOfGradients ()
	Destructor.
virtual void	calculateGradient (const Image< float > &img, const Image< float > &img2, const Image< float > &img3, Image< float > &gradmag, Image< float > &gradang)
	Calculate the gradient of 1-3 chanels of images.
virtual std::vector< float >	createHistogramFromGradient (const Image< float > &gradmag, const Image< float > &gradang)
	Calculate histogram using a gradient.
virtual std::vector< float >	createHistogram (const Image< float > &img, const Image< float > &img2=Image< float >(), const Image< float > &img3=Image< float >())
	Create histogram of max of gradient across 1-3 channels of an image.
virtual std::vector< float >	normalizeFeatureVector (FeatureVector featureVector)
	Normalize block using nearby blocks.
virtual void	addToBin (const float xf, const float yf, const float ang_in, const float mag, const bool oriSigned, FeatureVector &fv)
	Force angle to conform to oriSigned option and add to histogram.
Protected Attributes
bool	itsNormalize
	Whether to normalize columns in the histogram.
Dims	itsCellDims
bool	itsFixedDims
	If true, fix the size of the histogram no matter the image size, if false, fix the size of the cell no matter the image size.
int	itsOriBins
	Number of bins to categorize orientations.
bool	itsOriSigned
float	itsEpsilon

Detailed Description

Definition at line 52 of file HistogramOfGradients.H.

Constructor & Destructor Documentation

HistogramOfGradients::HistogramOfGradients	(	bool	normalize = `true`,
		Dims	cellDims = `Dims(8,8)`,
		bool	fixedCells = `false`,
		int	numOrientations = `9`,
		bool	signedOrient = `false`
	)

Constructor.

Definition at line 49 of file HistogramOfGradients.C.

HistogramOfGradients::~HistogramOfGradients ( ) [virtual]

Destructor.

Definition at line 60 of file HistogramOfGradients.C.

Member Function Documentation

void HistogramOfGradients::addToBin	(	const float	xf,
		const float	yf,
		const float	ang_in,
		const float	mag,
		const bool	oriSigned,
		FeatureVector &	fv
	)			`[virtual]`

Force angle to conform to oriSigned option and add to histogram.

Definition at line 211 of file HistogramOfGradients.C.

References FeatureVector::addValue(), and FeatureVector::getZSize().

Referenced by JunctionHOG::calculateJunctionHistogram(), and createHistogramFromGradient().

void HistogramOfGradients::calculateGradient	(	const Image< float > &	img,
		const Image< float > &	img2,
		const Image< float > &	img3,
		Image< float > &	gradmag,
		Image< float > &	gradang
	)			`[virtual]`

Calculate the gradient of 1-3 chanels of images.

Definition at line 72 of file HistogramOfGradients.C.

References gradientSobel(), Image< T >::initialized(), and takeLinkedMax().

Referenced by createHistogram().

std::vector< float > HistogramOfGradients::createHistogram	(	const Image< float > &	img,
		const Image< float > &	img2 = `Image<float>()`,
		const Image< float > &	img3 = `Image<float>()`
	)			`[virtual]`

Create histogram of max of gradient across 1-3 channels of an image.

Definition at line 64 of file HistogramOfGradients.C.

References calculateGradient(), and createHistogramFromGradient().

std::vector< float > HistogramOfGradients::createHistogramFromGradient	(	const Image< float > &	gradmag,
		const Image< float > &	gradang
	)			`[virtual]`

Calculate histogram using a gradient.

Reimplemented in JunctionHOG.

Definition at line 97 of file HistogramOfGradients.C.

References addToBin(), Image< T >::coordsOk(), Image< T >::getHeight(), Image< T >::getValInterp(), Image< T >::getWidth(), Dims::h(), itsCellDims, itsFixedDims, itsNormalize, itsOriBins, normalizeFeatureVector(), and Dims::w().

Referenced by createHistogram().

std::vector< float > HistogramOfGradients::normalizeFeatureVector ( FeatureVector featureVector ) [virtual]

Normalize block using nearby blocks.

Definition at line 142 of file HistogramOfGradients.C.

References FeatureVector::getFeatureVector(), FeatureVector::getXSize(), FeatureVector::getYSize(), FeatureVector::getZSize(), and sqrt().

Referenced by JunctionHOG::calculateJunctionHistogram(), and createHistogramFromGradient().

Member Data Documentation

Dims HistogramOfGradients::itsCellDims [protected]

If fixed dims is true, itsCellDims is the number of cells in the histogram whose cell size depends on the input image If fixed dims is false, itsCellDims is the size of an individual cell, and the number of cells depends on the input image

Definition at line 88 of file HistogramOfGradients.H.

Referenced by JunctionHOG::calculateJunctionHistogram(), and createHistogramFromGradient().

bool HistogramOfGradients::itsFixedDims [protected]

If true, fix the size of the histogram no matter the image size, if false, fix the size of the cell no matter the image size.

Definition at line 90 of file HistogramOfGradients.H.

Referenced by JunctionHOG::calculateJunctionHistogram(), and createHistogramFromGradient().

bool HistogramOfGradients::itsNormalize [protected]

Whether to normalize columns in the histogram.

Definition at line 85 of file HistogramOfGradients.H.

Referenced by JunctionHOG::calculateJunctionHistogram(), and createHistogramFromGradient().

int HistogramOfGradients::itsOriBins [protected]

Number of bins to categorize orientations.