This class computes the symmetric Kullback-Leibler distance of a given Region. More...

#include <kullbackleiblerdistance.h>

Inheritance diagram for gaia2::KullbackLeiblerDistance:

Public Member Functions
	KullbackLeiblerDistance (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	_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 Kullback-Leibler distance of a given Region.

Parameters

descriptorName the name of the descriptor for which you want to compute the KL-distance. This descriptor needs to have 3 sub-descriptors: mean, cov, and icov. (representing, resp., the mean of the frames, the covariance matrix, and the inverse of the covariance matrix.

Member Function Documentation

Real KullbackLeiblerDistance::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.

References gaia2::traceMatrixProduct(), and gaia2::traceMatrixProductMean().

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

src/metrics/kullbackleiblerdistance.h
src/metrics/kullbackleiblerdistance.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation