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lti::location

lti::location Class Reference

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

#include <ltiLocation.h>

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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

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.

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

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.

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.

The documentation for this class was generated from the following file:
Generated on Thu Nov 24 16:44:34 2005 for LTI-Lib by Doxygen 1.4.4