clickDetector
Class TriggerFilter

java.lang.Object
  clickDetector.TriggerFilter

public class TriggerFilter
extends java.lang.Object

Author:

Doug Gillespie

Really simple filter for creating decaying averages of the rectified signals in the click triggers.

Field Summary

(package private) double[]	alpha
(package private) double[]	alpha_1
(package private) double	memory

Constructor Summary

TriggerFilter(double alpha, double initialValue)

TriggerFilter(double alpha1, double alpha2, double initialValue)

Method Summary

double	runFilter(double newValue, boolean overThreshold) Runs the filter ona single sample
void	setMemory(double memory)
private void	setupFilter(double alpha1, double alpha2, double initialValue) Initialises the filter

Methods inherited from class java.lang.Object

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

Field Detail

alpha

double[] alpha

alpha_1

double[] alpha_1

memory

double memory

Constructor Detail

TriggerFilter

public TriggerFilter(double alpha,
                     double initialValue)

Parameters:

alpha - decay constant

initialValue - Initidalisation value

TriggerFilter

public TriggerFilter(double alpha1,
                     double alpha2,
                     double initialValue)

Parameters:

alpha1 - decay constant

alpha2 - decay constant for use when trigger function is above threshold

initialValue - initialisation value

Method Detail

setupFilter

private void setupFilter(double alpha1,
                         double alpha2,
                         double initialValue)

Initialises the filter

Parameters:

alpha1 - decay constant

alpha2 - decay constant for use when trigger function is above threshold

initialValue - initialisation value

runFilter

public double runFilter(double newValue,
                        boolean overThreshold)

Runs the filter ona single sample

Parameters:

newValue - filter input

overThreshold - over threshold flag (controls which alpha value to use)

Returns:

filter output

setMemory

public void setMemory(double memory)