org.cripac.isee.pedestrian.tracking

Class Tracklet

java.lang.Object

org.cripac.isee.alg.pedestrian.tracking.Tracklet

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class Tracklet
extends java.lang.Object
implements java.io.Serializable, java.lang.Cloneable

The Tracklet class stores a sequence of bounding boxes, representing the track of a pedestrian in a video.

TODO Should assign an IDRANK to each track or use some other methods to identify them.

Author:

Ken Yu, CRIPAC, 2016

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Tracklet.BoundingBox The BoundingBox class stores the location of an object in a single static frame.
static class	Tracklet.Identifier Identifier of a tracklet.

Field Summary

Fields

Modifier and Type	Field and Description
Tracklet.Identifier	id The identifier of the track.
Tracklet.BoundingBox[]	locationSequence A sequence of locations (as a form of BoundingBox) of the pedestrian at each moment in the tracklet.
int	numTracklets The total number of tracklets in the video.
int	startFrameIndex The starting frame index of this track in the source video.

Constructor Summary

Constructors

Constructor and Description
Tracklet()

Method Summary

Modifier and Type	Method and Description
java.util.Collection<Tracklet.BoundingBox>	getSamples()
void	sample(int numSamples) Select some bounding boxes as the appearance samples of the pedestrian.
java.lang.String	toString() Transform this tracklet to Json string.

Methods inherited from class java.lang.Object

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

Field Detail

id

public Tracklet.Identifier id

The identifier of the track.

numTracklets

public int numTracklets

The total number of tracklets in the video. This field can be left as -1, meaning that this information is not available yet, but setting this field can help checking whether all tracklets have been obtained or processed in latter steps. So it is highly recommended that track generators should also fill in this field.

startFrameIndex

public int startFrameIndex

The starting frame index of this track in the source video. User can use this to calculate the starting time of this track using the FPS information of the video. Its default value is -1, meaning the index has not been determined yet.

locationSequence

public Tracklet.BoundingBox[] locationSequence

A sequence of locations (as a form of BoundingBox) of the pedestrian at each moment in the tracklet.

Constructor Detail

Tracklet

public Tracklet()

Method Detail

toString

public java.lang.String toString()

Transform this tracklet to Json string.

Overrides:

toString in class java.lang.Object

Returns:

a json string of this tracklet.

sample

public void sample(int numSamples)

Select some bounding boxes as the appearance samples of the pedestrian. Only these bounding boxes retain the patch data, and patch data in other bounding boxes will be cleared, so as the tracklet consumes less memory.

Parameters:

numSamples - number of samples to be selected.

getSamples

public java.util.Collection<Tracklet.BoundingBox> getSamples()