net.sf.jaer.eventprocessing.filter
Class CircularConvolutionFilter

java.lang.Object
  net.sf.jaer.eventprocessing.EventFilter
      net.sf.jaer.eventprocessing.EventFilter2D
          net.sf.jaer.eventprocessing.filter.CircularConvolutionFilter

All Implemented Interfaces:

java.util.Observer

public class CircularConvolutionFilter
extends EventFilter2D
implements java.util.Observer

Computes circular convolutions by splatting out events and checking receiving pixels to see if they exceed a threshold. A behavioral model of Raphael/Bernabe convolution chip, but limited in that it presently only allows positive binary kernel weights, thus the output events an be triggered by lots of input activity.

Author:

tobi

Field Summary

int	NUM_OUTPUT_TYPES the number of cell output types

Fields inherited from class net.sf.jaer.eventprocessing.EventFilter2D

enclosedFilter, out

Fields inherited from class net.sf.jaer.eventprocessing.EventFilter

annotationEnabled, chip, enclosedFilterChain, filterEnabled, log, perf, propertyTooltipMap, support

Constructor Summary

CircularConvolutionFilter(AEChip chip)
Creates a new instance of TypeCoincidenceFilter

Method Summary

EventPacket	filterPacket(EventPacket in) Subclasses implement this method to define custom processing.
static java.lang.String	getDescription()
java.lang.Object	getFilterState() should return the filter state in some useful form
int	getRadius()
float	getTauMs()
float	getThreshold()
void	initFilter() this should allocate and initialize memory: it may be called when the chip e.g.
boolean	isGeneratingFilter()
void	resetFilter() should reset the filter to initial state
void	setRadius(int radius)
void	setTauMs(float tauMs)
void	setThreshold(float threshold)
void	update(java.util.Observable o, java.lang.Object arg)

Methods inherited from class net.sf.jaer.eventprocessing.EventFilter2D

checkOutputPacketEventType, checkOutputPacketEventType, getEnclosedFilter, resetOut, setEnclosedFilter, setFilterEnabled

Methods inherited from class net.sf.jaer.eventprocessing.EventFilter

getChip, getEnclosedFilterChain, getEnclosingFilter, getPrefs, getPropertyChangeSupport, getPropertyTooltip, isAnnotationEnabled, isEnclosed, isFilterEnabled, prefsEnabledKey, setAnnotationEnabled, setChip, setEnclosed, setEnclosedFilter, setEnclosedFilterChain, setEnclosingFilter, setPreferredEnabledState, setPrefs, setPropertyTooltip

Methods inherited from class java.lang.Object

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

Field Detail

NUM_OUTPUT_TYPES

public final int NUM_OUTPUT_TYPES

the number of cell output types

See Also:

Constant Field Values

Constructor Detail

CircularConvolutionFilter

public CircularConvolutionFilter(AEChip chip)

Creates a new instance of TypeCoincidenceFilter

Method Detail

getDescription

public static java.lang.String getDescription()

isGeneratingFilter

public boolean isGeneratingFilter()

getFilterState

public java.lang.Object getFilterState()

Description copied from class: EventFilter

should return the filter state in some useful form

Specified by:

getFilterState in class EventFilter

resetFilter

public void resetFilter()

Description copied from class: EventFilter

should reset the filter to initial state

Specified by:

resetFilter in class EventFilter

initFilter

public void initFilter()

Description copied from class: EventFilter

this should allocate and initialize memory: it may be called when the chip e.g. size parameters are changed after creation of the filter

Specified by:

initFilter in class EventFilter

update

public void update(java.util.Observable o,
                   java.lang.Object arg)

Specified by:

update in interface java.util.Observer

getRadius

public int getRadius()

setRadius

public void setRadius(int radius)

getTauMs

public float getTauMs()

setTauMs

public void setTauMs(float tauMs)

getThreshold

public float getThreshold()

setThreshold

public void setThreshold(float threshold)

filterPacket

public EventPacket filterPacket(EventPacket in)

Description copied from class: EventFilter2D

Subclasses implement this method to define custom processing.

Specified by:

filterPacket in class EventFilter2D

Parameters:

in - the input packet

Returns:

the output packet