lti::location Class Reference

The location class specifies a small region in an image or channel. More...

#include <ltiLocation.h>

Collaboration diagram for lti::location:

[legend]

List of all members.

Public Member Functions
	location ()
	location (const point &pos, const float &ang, const float &rad)
	location (const tpoint< float > &pos, const float &ang, const float &rad)
	location (const location &other)
location &	copy (const location &other)
location &	operator= (const location &other)
bool	operator== (const location &p) const
bool	operator!= (const location &p) const
bool	operator< (const location &other)
bool	operator> (const location &other)
location &	scale (const float &factor)
location &	scale (const location &other, const float &factor)
location &	shift (const point &shft)
location &	shift (const tpoint< float > &shft)
location &	shift (const location &other, const point &shft)
location &	shift (const location &other, const tpoint< float > &shft)
location &	rotate (const float &factor)
location &	rotate (const location &other, const float &factor)
bool	contains (const point &p) const
bool	contains (const tpoint< float > &p) const
float	distance (const location &other)
Public Attributes
tpoint< float >	position
float	angle
float	radius

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Detailed Description

The location class specifies a small region in an image or channel.

It is mainly used in the extraction of local features. There are some functors to extract the important or salient locations in an image, for example lti::axLocalRegions.

The locations are represented by its position in an image or channel, an orientation and a radius.

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Constructor & Destructor Documentation

lti::location::location

(

)

default constructor

lti::location::location	(	const point &	pos,
		const float &	ang,
		const float &	rad
	)

Constructor.

Parameters:

	pos	position of the middle point of the location
	ang	angle of the location (in radians)
	rad	radius or size of the location

lti::location::location	(	const tpoint< float > &	pos,
		const float &	ang,
		const float &	rad
	)

Constructor.

Parameters:

	pos	position of the middle point of the location
	ang	angle of the location (in radians)
	rad	radius or size of the location

lti::location::location

(

const location &

other

)

copy constructor

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Member Function Documentation

bool lti::location::contains

(

const tpoint< float > &

p

)

const

Check if the given point can be considered within the location, i.e.

if ||p-position|| < radius

bool lti::location::contains

(

const point &

p

)

const

Check if the given point can be considered within the location, i.e.

if ||p-position|| < radius

location& lti::location::copy

(

const location &

other

)

copy operator

float lti::location::distance

(

const location &

other

)

returns the distance between the borders of two locations or zero if they overlap or if one of the locations lies inside the other one.

bool lti::location::operator!=

(

const location &

p

)

const

operator !=

bool lti::location::operator<

(

const location &

other

)

Comparition operator.

A location is smaller than another one if its radius is smaller, or in case of equal radii, if the position is smaller, i.e. if it has smaller y-coordinate, or in case of equal y-position, if it has smaller x-coordinate.

location& lti::location::operator=

(

const location &

other

)

alias for copy operator

bool lti::location::operator==

(

const location &

p

)

const

operator ==

bool lti::location::operator>

(

const location &

other

)

Comparition operator.

A location is greater than another one if its radius is greater, or in case of equal radii, if the position is greater, i.e. if it has greater y-coordinate, or in case of equal y-position, if it has greater x-coordinate.

location& lti::location::rotate	(	const location &	other,
		const float &	factor
	)

Add the given angle in radius to the angle of the other location and leave the result here.

location& lti::location::rotate

(

const float &

factor

)

Add the given angle in radius to the actual angle.

location& lti::location::scale	(	const location &	other,
		const float &	factor
	)

Multiply the other location's radius and position with the given factor and leave the result here.

location& lti::location::scale

(

const float &

factor

)

Multiply the radius and position with the given factor.

location& lti::location::shift	(	const location &	other,
		const tpoint< float > &	shft
	)

Shift the other location by the given point and leave the result here.

location& lti::location::shift	(	const location &	other,
		const point &	shft
	)

Shift the other location by the given point and leave the result here.

location& lti::location::shift

(

const tpoint< float > &

shft

)

Shift the location by the given point.

location& lti::location::shift

(

const point &

shft

)

Shift the location by the given point.

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Member Data Documentation

float lti::location::angle

Angle in radius of the location.

It is usually given for the image coordinates, i.e. for a left coordinate system, in which positive angles are given clock-wise.

tpoint<float> lti::location::position

Position of the location.

float lti::location::radius

Radius or size of the location.

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

• ltiLocation.h