This class computes the symmetric resistor-average distance of a given Region. More...

#include <resistoraveragedistance.h>

Inheritance diagram for gaia2::ResistorAverageDistance:

Public Member Functions
	ResistorAverageDistance (const PointLayout &layout, const ParameterMap &params)

Real	operator() (const Point &p1, const Point &p2, int seg1, int seg2) const
	This function computes the distance between the two given points. More...

Public Member Functions inherited from gaia2::DistanceFunction
	DistanceFunction (const PointLayout &layout, const ParameterMap &params)

const PointLayout &	layout () const

const Region &	checkFixedLength (const Region &region) const
	Checks that the given Region only contains fixed-length descriptors and throws an exception if not. More...

Protected Attributes
int	_meanIdx

int	_covIdx

int	_icovIdx

int	_covdetIdx

int	_meanIdxEnd

int	_covIdxEnd

int	_icovIdxEnd

Protected Attributes inherited from gaia2::DistanceFunction
PointLayout	_layout

ParameterMap	_params

Region	_region

Additional Inherited Members
Public Attributes inherited from gaia2::DistanceFunction
QString	name
	Name for the metric, usually the key that was used to instantiate it from the factory.

QStringList	validParams
	List of valid parameters this analyzer accepts. More...

Detailed Description

This class computes the symmetric resistor-average distance of a given Region.

This distance is based on the harmonic mean of the Kullback-Leibler divergence. More details can be found in the "Symmetrizing the Kullback-Leibler Distance" 2001 paper by Don H. Johnson and Sinan Sinanović.

NB: compared to the Kullback-Leibler distance, this one also needs the determinant of the covariance matrix to be precomputed.

Parameters

descriptorName the name of the descriptor for which you want to compute the KL-distance. This descriptor needs to have 4 sub-descriptors: mean, cov, icov and covdet. (representing, resp., the mean of the frames, the covariance matrix, the inverse of the covariance matrix and the determinant of the covariance matrix).

Member Function Documentation

Real ResistorAverageDistance::operator()	(	const Point &	p1,
		const Point &	p2,
		int	seg1,
		int	seg2
	)		const

virtual

This function computes the distance between the two given points.

It needs to be implemented in each subclass. It takes as optional arguments the number of the segments on which to operate.

Implements gaia2::DistanceFunction.

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

src/metrics/resistoraveragedistance.h
src/metrics/resistoraveragedistance.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation