Package edu.gsu.cs.dmlab.tracking.stages

Class BaseEdgeWeightCalculator

java.lang.Object

edu.gsu.cs.dmlab.tracking.stages.BaseEdgeWeightCalculator

All Implemented Interfaces:

ISTEdgeWeightCalculator

Direct Known Subclasses:

EdgeWeightCalculatorStageThree, EdgeWeightCalculatorStageTwo

public abstract class BaseEdgeWeightCalculator
extends Object
implements ISTEdgeWeightCalculator

Base abstract class used for calculating edge weights on a DAG used for the data association problem. Since different stages of Kempton et. al 2015 and 2018 use different components for edge weight calculation, the getEdgeProb method must be implemented in classes derived from this one.

Author:

Dustin Kempton, Data Mining Lab, Georgia State University

Constructor Summary

Constructors

Constructor	Description
BaseEdgeWeightCalculator(ISTLocationProbCal enterLocProbCalc, ISTLocationProbCal exitLocProbCalc, ISTObsModel obsModel)	Constructor that uses the default values for entExitMult, obsMult, and assocMult.
BaseEdgeWeightCalculator(ISTLocationProbCal enterLocProbCalc, ISTLocationProbCal exitLocProbCalc, ISTObsModel obsModel, double entExitMult, double obsMult, double assocMult)	Constructor

Method Summary

Modifier and Type	Method	Description
double	associationEdgeWeight(ISTTrackingTrajectory leftTrack, ISTTrackingTrajectory rightTrack)	Returns the weight for an edge that goes between the second vertex of the first track to the first vertex of the second track.
void	finalize()
protected abstract double	getEdgeProb(ISTTrackingTrajectory leftTrack, ISTTrackingTrajectory rightTrack)
double	observationEdgeWeight(ISTTrackingEvent event)	Returns the weight for an edge that goes between the two vertices that represent the passed in event.
double	sinkEdgeWeight(ISTTrackingEvent event)	Returns the weight for an edge from the vertex representing the passed in event to the sink.
double	sourceEdgeWeight(ISTTrackingEvent event)	Returns the weight for an edge from the source to the vertex representing the passed in event.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BaseEdgeWeightCalculator

public BaseEdgeWeightCalculator(ISTLocationProbCal enterLocProbCalc,
                                ISTLocationProbCal exitLocProbCalc,
                                ISTObsModel obsModel)

Constructor that uses the default values for entExitMult, obsMult, and assocMult.

Parameters:

enterLocProbCalc - The model used for calculating enter probability on a track.

exitLocProbCalc - The model used for calculating exit probability on a track.

obsModel - The model used for calculating the probability of a track being plausible.

BaseEdgeWeightCalculator

public BaseEdgeWeightCalculator(ISTLocationProbCal enterLocProbCalc,
                                ISTLocationProbCal exitLocProbCalc,
                                ISTObsModel obsModel,
                                double entExitMult,
                                double obsMult,
                                double assocMult)

Constructor

Parameters:

enterLocProbCalc - The model used for calculating enter probability on a track.

exitLocProbCalc - The model used for calculating exit probability on a track.

obsModel - The model used for calculating the probability of a track being plausible.

entExitMult - The multiplier for enter and exit probabilities.

obsMult - The multiplier for the observation edge.

assocMult - The multiplier for the association edge.

Method Detail

finalize

public void finalize()
              throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

sourceEdgeWeight

public double sourceEdgeWeight(ISTTrackingEvent event)

Description copied from interface: ISTEdgeWeightCalculator

Returns the weight for an edge from the source to the vertex representing the passed in event.

Specified by:

sourceEdgeWeight in interface ISTEdgeWeightCalculator

Parameters:

event - The event to calculate the edge weight for.

Returns:

The edge weight for the edge from the source

sinkEdgeWeight

public double sinkEdgeWeight(ISTTrackingEvent event)

Description copied from interface: ISTEdgeWeightCalculator

Returns the weight for an edge from the vertex representing the passed in event to the sink.

Specified by:

sinkEdgeWeight in interface ISTEdgeWeightCalculator

Parameters:

event - The event to calculate the edge weight for.

Returns:

The edge weight for the edge to the sink

observationEdgeWeight

public double observationEdgeWeight(ISTTrackingEvent event)

Description copied from interface: ISTEdgeWeightCalculator

Returns the weight for an edge that goes between the two vertices that represent the passed in event. The weight represents the probability of this event being a true detection as opposed to a false detection.

Specified by:

observationEdgeWeight in interface ISTEdgeWeightCalculator

Parameters:

event - The event to calculate the edge weight for.

Returns:

A value representing how likely it is that the given event is a true detection.

associationEdgeWeight

public double associationEdgeWeight(ISTTrackingTrajectory leftTrack,
                                    ISTTrackingTrajectory rightTrack)

Description copied from interface: ISTEdgeWeightCalculator

Returns the weight for an edge that goes between the second vertex of the first track to the first vertex of the second track. This weight represents how likely it is that these two tracks represent the same object at different times.

Specified by:

associationEdgeWeight in interface ISTEdgeWeightCalculator

Parameters:

leftTrack - The earlier track

rightTrack - The later track

Returns:

A value representing how likely it is that the two tracks represent the same object.

getEdgeProb

protected abstract double getEdgeProb(ISTTrackingTrajectory leftTrack,
                                      ISTTrackingTrajectory rightTrack)