ThresholdSaccadeController Class Reference

Threshold-limited controller that eliminates small or unreliable shifts. More...

#include <Neuro/SaccadeControllers.H>

Inheritance diagram for ThresholdSaccadeController:

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Collaboration diagram for ThresholdSaccadeController:

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List of all members.

Public Member Functions
	ThresholdSaccadeController (OptionManager &mgr, const SaccadeBodyPart bodypart)
	Constructor.
virtual	~ThresholdSaccadeController ()
	Destructor.
virtual void	reset1 ()
	Reset ThresholdSaccadeController.
virtual void	checkPercepts (bool &areclose, Point2D< int > &avgp)
	Check queued-up percepts and return average.
Protected Member Functions
virtual void	doEvolve (SimEventQueue &q)
	evolve one time step
virtual void	computeWhenNewPercept (SimEventQueue &q)
	This method is called each time a new percept has arrived.
virtual void	computeWhenResetPos (SimEventQueue &q)
	This method is called each time a reset is made.
virtual Point2D< int >	computeWhenNewDecision (SaccadeState &sacstate, bool &blinkstate, SimEventQueue &q)
	This method is called each time a new decision is requested.
virtual void	start1 ()
	Get us started.
Protected Attributes
OModelParam< float >	itsOdist
	min overt distance
OModelParam< float >	itsCdist
	max covert distance
OModelParam< int >	itsMinNum
	min number of close covert shifts
OModelParam< bool >	itsSalWeight
	weight average covert pos by saliency
nub::ref< SpatialMetrics >	itsMetrics
	metrics that depend on input size
float	odistsq
float	cdistsq
bool	sweight
bool	didresetpos
Point2D< int >	resetloc
Friends
class	ThresholdFrictionSaccadeController

Detailed Description

Threshold-limited controller that eliminates small or unreliable shifts.

ThresholdSaccadeController will issue an overt control whenever the received covert shifts are large and go to a same target for several successive covert shifts. It is hence to be used with IOR turned off, so that the covert system will keep attending to a same location for a while. Once a minimum number of covert shifts have been made that are sufficiently far from the current overt location and that are sufficiently close to each other, an overt shift will be issued, to the average location of the accumulated covert locations.

Definition at line 204 of file SaccadeControllers.H.

Constructor & Destructor Documentation

ThresholdSaccadeController::ThresholdSaccadeController	(	OptionManager &	mgr,
		const SaccadeBodyPart	bodypart
	)

Constructor.

Parameters:

	minovertdist	minimum distance required to warrant an overt shift (in pixels at the original image's scale).
	maxcovertdist	maximum distance to consider that two covert shifts point to the "same" location.
	minfix	minimum number of covert shifts within maxcovertdist of each other and farther than minovertdist from the curent overt fixation, such as to warrant an overt shift.
	sweigh	if true, average covert location is a weighted average with saliency values at the covert locations used as weights. Otherwise, the weight of each covert location is unity.
	part	As this controller may be used either for the eye or for the head (as part of bigger controllers that include both eye and head), this should be either SaccadeBodyPartEye or SaccadeBodyPartHead and will determine which model options we use for our internal parameters (eye or head)