boofcv.abst.feature.tracker

Interface PointTrackerTwoPass<T extends boofcv.struct.image.ImageBase>

All Superinterfaces:

PointTracker<T>

All Known Implementing Classes:

DetectDescribeAssociateTwoPass, PointTrackerToTwoPass, PointTrackerTwoPassCombined, PointTrackerTwoPassKltPyramid

public interface PointTrackerTwoPass<T extends boofcv.struct.image.ImageBase>
extends PointTracker<T>

Extension of PointTracker allows for predictions of a feature's location to be incorporated into the tracker. A typical usage would be to first run the tracker, estimate a motion model, then use the said motion model to predict each feature's location.

The behavior of process(boofcv.struct.image.ImageBase)} has been changed. It will only update each track's location and the active list. performSecondPass() will also only update the track's location and active list. finishTracking() will update the dropped list and change the track's description.

Dropping tracks: Tracks should not be dropped until after finishTracking() has been called. If a track is dropped between process() and finishTracking() are called, then the behavior is not defined.

NOTES:

1. A track hint can be set before process(boofcv.struct.image.ImageBase) is called.
2. Calling process(boofcv.struct.image.ImageBase) and finishTracking() is equivalent to just calling process() in the standard PointTracker interface.

Method Summary

Modifier and Type	Method and Description
void	finishTracking() Finishes tracking and updates the track's description, updates inactive and drop track lists.
void	performSecondPass() Updates spacial information for each track and active list.
void	process(T image) Changes behavior of PointTracker.process(boofcv.struct.image.ImageBase) in that it will only update each track's location, but not its description, and the active list.
void	setHint(double pixelX, double pixelY, PointTrack track) Provides a hint for where the

Methods inherited from interface boofcv.abst.feature.tracker.PointTracker

dropAllTracks, dropTrack, getActiveTracks, getAllTracks, getDroppedTracks, getInactiveTracks, getNewTracks, reset, spawnTracks

Method Detail

process

void process(T image)

Changes behavior of PointTracker.process(boofcv.struct.image.ImageBase) in that it will only update each track's location, but not its description, and the active list. Call finishTracking() to update the track's description, the inactive list, and the dropped list. An exception is thrown if multiple calls to this function are made without calling finishTracking().

Specified by:

process in interface PointTracker<T extends boofcv.struct.image.ImageBase>

Parameters:

image - Next image in the sequence

performSecondPass

void performSecondPass()

Updates spacial information for each track and active list. Does not change the track description or any other lists. Can be called multiple times.

finishTracking

void finishTracking()

Finishes tracking and updates the track's description, updates inactive and drop track lists.

setHint

void setHint(double pixelX,
             double pixelY,
             PointTrack track)

Provides a hint for where the

Parameters:

pixelX - x-coordinate hint for where the track is in the image

pixelY - y-coordinate hint for where the track is in the image

track - The track for which the hint is being provided for