Describes features of an image region. More...

#include <KeyPoint.h>

Public Member Functions
void	addDescriptor (std::vector< double > descriptor)
double	calcIntersection (const KeyPoint &other)
double	calcOverlap (const KeyPoint &other)
template<class T >
void	copyDescriptor (T *descriptor, int length)
	allocate descriptor memory and copy from given source
std::vector< Point2D >	getBoundingBox () const
std::vector< Point2D >	getCenterArrow () const
std::vector< Point2D >	getCircle () const
	KeyPoint (float _x, float _y, float _scale, float _strength, int _sign, float _orientation, std::vector< double > _featureVector)
	The constructor.
	KeyPoint (float _x, float _y, float _scale, float _strength, int _sign)
	KeyPoint ()
	KeyPoint (const KeyPoint &other)
KeyPoint &	operator= (const KeyPoint &other)
Point2D	position ()
double	squaredDistance (const KeyPoint &other) const
double	squaredDistance (const KeyPoint &other, double max) const
	speed-optimized partial calculation of descriptor distance calculates the squared euclidean distance, but cancels the calculation when a given minumum value is reached
std::string	toASCII ()
std::string	toString ()
	~KeyPoint ()
	The destructor.
Public Attributes
std::vector< double >	featureVector
float	orientation
float	scale
int	sign
float	strength
std::vector< unsigned >	vectorLimits
float	x
	properties
float	y

Detailed Description

Describes features of an image region.

Author:: David Gossow (RX)

Definition at line 23 of file KeyPointExtraction/KeyPoint.h.

Constructor & Destructor Documentation

KeyPoint::KeyPoint	(	float	_x,
		float	_y,
		float	_scale,
		float	_strength,
		int	_sign,
		float	_orientation,
		std::vector< double >	_featureVector
	)

The constructor.

Parameters:

x,y	position within the image
scale	describes the dimension of the feature, the actual pixel size depends on which feature extractor is used
strength	strength (e.g. contrast) of the feature
orientation	main direction of the feature
sign	leading sign of the feature (e.g. sign of laplacian provided by SURF)
featureVector	feature data

KeyPoint::KeyPoint	(	float	_x,
		float	_y,
		float	_scale,
		float	_strength,
		int	_sign
	)

KeyPoint::KeyPoint ( )

KeyPoint::~KeyPoint ( )

The destructor.

KeyPoint::KeyPoint ( const KeyPoint & other )

Member Function Documentation

void KeyPoint::addDescriptor ( std::vector< double > descriptor )

double KeyPoint::calcIntersection ( const KeyPoint & other )

Returns:: intersection of area with other keypoint

double KeyPoint::calcOverlap ( const KeyPoint & other )

Returns:: quotient of intersection and union of the keypoint areas

template<class T >

void KeyPoint::copyDescriptor	(	T *	descriptor,
		int	length
	)

allocate descriptor memory and copy from given source

Definition at line 103 of file KeyPointExtraction/KeyPoint.h.

std::vector<Point2D> KeyPoint::getBoundingBox ( ) const

Returns:: vertices of bounding box

std::vector<Point2D> KeyPoint::getCenterArrow ( ) const

Returns:: vertices of arrow pointing to up direction

std::vector<Point2D> KeyPoint::getCircle ( ) const

Returns:: vertices of circle representing detection scale

KeyPoint& KeyPoint::operator= ( const KeyPoint & other )

Point2D KeyPoint::position ( ) [inline]

Definition at line 53 of file KeyPointExtraction/KeyPoint.h.

double KeyPoint::squaredDistance ( const KeyPoint & other ) const

Returns:: squared euclidean distance

double KeyPoint::squaredDistance	(	const KeyPoint &	other,
		double	max
	)		const

speed-optimized partial calculation of descriptor distance calculates the squared euclidean distance, but cancels the calculation when a given minumum value is reached