net.sf.jaer.util.filter
Class Filter

java.lang.Object
  net.sf.jaer.util.filter.Filter

Direct Known Subclasses:

BandpassFilter, HighpassFilter, LowpassFilter

public abstract class Filter
extends java.lang.Object

Base class for IIR filters.

Author:

tobi

Field Summary

protected boolean	initialized This flag is false until the filter sets it true on the first value.
protected int	lastTime The last timestamp used
protected float	tauMs The filter time constant in ms
int	TICK_PER_MS ticks per ms of input time

Constructor Summary

Filter()

Method Summary

float	get3dBFreqHz()
int	getLastTime() return last time filter was called.
float	getTauMs()
void	set3dBFreqHz(float freq)
void	setTauMs(float tauMs)

Methods inherited from class java.lang.Object

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

Field Detail

TICK_PER_MS

public final int TICK_PER_MS

ticks per ms of input time

See Also:

Constant Field Values

tauMs

protected float tauMs

The filter time constant in ms

lastTime

protected int lastTime

The last timestamp used

initialized

protected boolean initialized

This flag is false until the filter sets it true on the first value.

Constructor Detail

Filter

public Filter()

Method Detail

getTauMs

public float getTauMs()

setTauMs

public void setTauMs(float tauMs)

Parameters:

tauMs - the time constant in ms

set3dBFreqHz

public void set3dBFreqHz(float freq)

Parameters:

freq - the 3dB corner frequency in Hz

get3dBFreqHz

public float get3dBFreqHz()

Returns:

3dB freq in Hz

getLastTime

public int getLastTime()

return last time filter was called. Can be used to look for negative time