gml_TTracker Class Reference

#include <gml_Tracker.h>

Collaboration diagram for gml_TTracker:

Detailed Description

Track a set of points evolving in a 2D space over time. Tracking is very basic here: no prediction, no filtering. It's well suited for high frequency or slow movement applications.


Public Member Functions
gml_TError	Init (UInt32 maxTrackedPoints, Float32 maxSpeed)
	Setup data structure for tracking.
void	Dispose ()
gml_TError	Step (gml_TPointFloat *points, UInt32 npoints)
	Feed newly detected coordinates to the tracker, and generate events.
gml_TError	Queue (gml_TTrackingEventQueue *&queue)
	Return the queue of events to be processed.
void	Reset ()
	Forget about all known tracked objects. The queue of events is updated accordingly with Disappear events.
Protected Attributes
gml_TTimer *	fTimer
	gives high-resolution absolute system time
gml_TTrackingEventQueue *	fQueue
	queue used to store the events
UInt32	fMaxTrackedPoints
	maximum number of tracked objects
Float32	fMaxSpeed
	maximum speed of tracked objects, in pixels/second
gml_TTrackedObject *	mTracked
	array of currently tracked objects
UInt32	fTrackedCount
	number of objects currently tracked
bool *	mTrackedFlags
	array of flags indicating if each < of the corresponding elements in < mTracked os in use

Member Function Documentation

gml_TError Init	(	UInt32	maxTrackedPoints,
		Float32	maxSpeed
	)

Setup data structure for tracking.

Parameters:

maxTrackedPoints	maximum number of simultaneously tracked objects
maxSpeed	maximum speed of tracked objects, in pixels/second

gml_TError Step	(	gml_TPointFloat *	points,
		UInt32	npoints
	)

Feed newly detected coordinates to the tracker, and generate events.

Bug:: some points may be ignored

Todo:: take fMaxSpeed into account

Todo:: fix this hack hack: threshold the distance for just-born fingers. this helps eliminate TTFs spawned from false alarms.

Bug:: if the stack is full stack full, drop candidate

Parameters:

points	array of newly detected coordinates
npoints	length of the points array

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

vision/gml_Tracker.h
vision/gml_Tracker.cc

gml_TTracker Class Reference

Detailed Description

Public Member Functions

Protected Attributes

Member Function Documentation