Learn the distance metric base class with sparse set of constraints (i.e., loss function over further target and nearest imposter only). More...

Inheritance diagram for drwnNNGraphSparseLearner:

Public Member Functions
	drwnNNGraphSparseLearner (const drwnNNGraph &graph, double lambda)

Public Member Functions inherited from drwnNNGraphLearner
	drwnNNGraphLearner (const drwnNNGraph &graph, double lambda)

virtual void	setTransform (const MatrixXd &Lt)=0

virtual MatrixXd	getTransform () const =0

virtual double	learn (unsigned maxCycles)

const drwnNNGraph &	getSrcGraph () const

const drwnNNGraph &	getPosGraph () const

const drwnNNGraph &	getNegGraph () const

void	clearLabelWeights ()

void	setLabelWeights (const vector< double > &w)

const vector< double > &	getLabelWeights () const

Protected Member Functions
virtual double	computeLossFunction () const

Protected Member Functions inherited from drwnNNGraphLearner
virtual double	computeObjective () const

virtual MatrixXd	computeSubGradient ()=0

virtual void	subGradientStep (const MatrixXd &G, double alpha)=0

virtual void	startMetricCycle ()

virtual void	endMetricCycle ()

void	updateGraphFeatures ()

void	nearestNeighbourUpdate (unsigned nCycle, unsigned maxIterations)

MatrixXd	initializeTransform () const
	initialize transform as feature whitener (diagonal Mahalanobis)

Additional Inherited Members
Static Public Attributes inherited from drwnNNGraphLearner
static double	ALPHA_ZERO = 5.0e-6

static unsigned	METRIC_ITERATIONS = 500

static unsigned	SEARCH_ITERATIONS = 20

Protected Attributes inherited from drwnNNGraphLearner
const drwnNNGraph &	_graph

double	_lambda

vector< double >	_labelWeights

drwnNNGraph	_posGraph

drwnNNGraph	_negGraph

unsigned	_dim
	feature vector dimensions

MatrixXd	_X
	cached (x_u - x_v) (x_u - x_v)^T

Detailed Description

Learn the distance metric base class with sparse set of constraints (i.e., loss function over further target and nearest imposter only).

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

Public Member Functions