add getArea() method and add method to check visibility based on aver…

…age event rate per pixel in the cluster.

Improve display for event rates.

src/ch/unizh/ini/jaer/projects/cochsoundloc/DetectMovementFilter.java

@@ -61,7 +61,7 @@ public EventPacket<? extends BasicEvent> filterPacket(EventPacket<? extends Basi
             int confidence = clst.getNumEvents();
             if (confidence > this.confidenceThreshold) {
                 java.awt.geom.Point2D.Float location = clst.getLocation();
-                //log.info("ClusterNumEvents: " + clst.getNumEvents() + " AvgEventRate: "+clst.getAvgEventRate());
+                //log.info("ClusterNumEvents: " + clst.getNumEvents() + " AvgEventRate: "+clst.getAvgEventRateHz());
                 //log.info("ClusterLocation: ( " + location.x + " , " + location.y + " )");
                 if (connectToPanTiltThread == true) {
                     CommObjForPanTilt filterOutput = new CommObjForPanTilt();

src/net/sf/jaer/eventprocessing/tracking/ClusterInterface.java

@@ -63,6 +63,13 @@ public interface ClusterInterface {
      */
     public float getRadius();
 
+     /** Returns area in pixels.
+     *
+     * @return some measure of cluster area size.
+     */
+    public float getArea();
+
+
     /** Returns measure of cluster 'mass' or importance.  This mass is increased by support (e.g. events) and decays away with lack of support.
      *
      * @return the mass measure.