net.sf.jaer.util
Class VectorHistogram

java.lang.Object
  net.sf.jaer.util.VectorHistogram

public class VectorHistogram
extends java.lang.Object

used for histogramming results of a vector computation like orientation or direction selectivity. Computes various useful derivatives.

Constructor Summary

VectorHistogram(int numTypes)

Method Summary

void	add(int val) add a new value to histogram
java.awt.geom.Point2D.Float	getAverageDir()
int[]	getCounts()
float[]	getNormalized()
float[]	getNormalizedByFactor(float factor)
int	getTotalCounts()
void	reset() resets all counts to zero
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorHistogram

public VectorHistogram(int numTypes)

Parameters:

numTypes - the number of histogram bins, i.e., the number of directions

Method Detail

getCounts

public int[] getCounts()

reset

public void reset()

resets all counts to zero

add

public void add(int val)

add a new value to histogram

Parameters:

val - the count value, must be in ranage 0 to numTypes-1

getNormalized

public float[] getNormalized()

Returns:

histogram values normalized to 1 for max value, or 0 if there are no counts

getNormalizedByFactor

public float[] getNormalizedByFactor(float factor)

Parameters:

factor - the multiplier

Returns:

histogram values normalized by multiplying each element by a factor

getAverageDir

public java.awt.geom.Point2D.Float getAverageDir()

Returns:

the average direction vector based on counts. theta increases CCW and starts up y axis

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getTotalCounts

public int getTotalCounts()