net.sf.jaer.eventprocessing.filter
Class SpatialBandpassFilter

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

All Implemented Interfaces:

java.util.Observer

public class SpatialBandpassFilter
extends EventFilter2D
implements java.util.Observer

Does an event-based spatial highpass filter, so that only small objects pass through.

Author:

tobi

Field Summary

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

SpatialBandpassFilter(AEChip c)
Creates a new instance of SpatialBandpassFilter

Method Summary

EventPacket	filterPacket(EventPacket in) Subclasses implement this method to define custom processing.
int	getCenterRadius()
static java.lang.String	getDescription()
int	getDtSurround()
java.lang.Object	getFilterState() should return the filter state in some useful form
int	getSurroundRadius()
void	initFilter() this should allocate and initialize memory: it may be called when the chip e.g.
void	resetFilter() should reset the filter to initial state
void	setCenterRadius(int centerRadius) sets the center radius, 0 meaning a single pixel.
void	setDtSurround(int dtSurround) sets the time in timestamp ticks (1us at present) that a spike in surround will inhibit a spike from center passing through.
void	setFilterEnabled(boolean yes) Resets the filter
void	setSurroundRadius(int surroundRadius) sets the surround radius.
void	update(java.util.Observable o, java.lang.Object arg)

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

checkOutputPacketEventType, checkOutputPacketEventType, getEnclosedFilter, resetOut, setEnclosedFilter

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

Constructor Detail

SpatialBandpassFilter

public SpatialBandpassFilter(AEChip c)

Creates a new instance of SpatialBandpassFilter

Method Detail

getDescription

public static java.lang.String getDescription()

setFilterEnabled

public void setFilterEnabled(boolean yes)

Description copied from class: EventFilter2D

Resets the filter

Overrides:

setFilterEnabled in class EventFilter2D

Parameters:

yes - true to reset

See Also:

EventFilter.setPreferredEnabledState()

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

update

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

Specified by:

update in interface java.util.Observer

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

getDtSurround

public int getDtSurround()

setDtSurround

public void setDtSurround(int dtSurround)

sets the time in timestamp ticks (1us at present) that a spike in surround will inhibit a spike from center passing through.

Parameters:

dtSurround - the time in us

getCenterRadius

public int getCenterRadius()

setCenterRadius

public void setCenterRadius(int centerRadius)

sets the center radius, 0 meaning a single pixel. This value is clipped to min 0.

Parameters:

centerRadius - the radius in pixels for a square area. 0 is 1 pixel, 1 is 9 pixels (3x3), etc.

getSurroundRadius

public int getSurroundRadius()

setSurroundRadius

public void setSurroundRadius(int surroundRadius)

sets the surround radius. This value is clipped to be at least the center radius plus 1.

Parameters:

surroundRadius - the radius in pixels for a square area. 1 is 9 pixels (3x3), etc.

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