net.sourceforge.jiu.color.data
Class BaseCoOccurrenceFrequencyMatrix

java.lang.Object
  net.sourceforge.jiu.color.data.BaseCoOccurrenceFrequencyMatrix

All Implemented Interfaces:

CoOccurrenceFrequencyMatrix

Direct Known Subclasses:

MemoryCoOccurrenceFrequencyMatrix

public abstract class BaseCoOccurrenceFrequencyMatrix

extends Object

implements CoOccurrenceFrequencyMatrix

This abstract class encapsulates all data of a co-occurrence frequency matrix except for the frequency values. The method computeStatistics is implemented. Any class extending this class only has to deal with storing the frequency values (MemoryCoOccurrenceFrequencyMatrix does this by using a one-dimensional array internally).

Author:

Marco Schmidt

Constructor Summary

BaseCoOccurrenceFrequencyMatrix()

Method Summary

void	computeStatistics() Assumes that the co-occurrence frequency values have been initialized.
double	getMean(int index) Returns the mean of the co-occurrence frequency values.
double	getScofMean() Returns the mean of all self co-occurrence frequency values.
double	getScofStddev() Returns the standard deviation of all self co-occurrence frequency values.
double	getScofSum() Return the sum of mean and standard deviation of the self co-occurrence frequency values.
double	getStddev(int index) Returns the standard deviation of the values getValue(index, i) with i running from 0 to CoOccurrenceFrequencyMatrix.getDimension() - 1.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sourceforge.jiu.color.data.CoOccurrenceFrequencyMatrix

clear, getDimension, getValue, getValue, setValue

Constructor Detail

BaseCoOccurrenceFrequencyMatrix

public BaseCoOccurrenceFrequencyMatrix()

Method Detail

computeStatistics

public void computeStatistics()

Assumes that the co-occurrence frequency values have been initialized. Computes mean and standard deviation for co-occurrence and self co-occurrence frequency values.

Specified by:

computeStatistics in interface CoOccurrenceFrequencyMatrix

getMean

public double getMean(int index)

Returns the mean of the co-occurrence frequency values.

Specified by:

getMean in interface CoOccurrenceFrequencyMatrix

getStddev

public double getStddev(int index)

Description copied from interface: CoOccurrenceFrequencyMatrix

Returns the standard deviation of the values getValue(index, i) with i running from 0 to CoOccurrenceFrequencyMatrix.getDimension() - 1.

Specified by:

getStddev in interface CoOccurrenceFrequencyMatrix

Parameters:

index - first argument to all calls of getValue used to determine the standard deviation

getScofMean

public double getScofMean()

Returns the mean of all self co-occurrence frequency values. This value is called $\mu_S$ in Shufelt's paper. This value is determined once within computeStatistics().

Specified by:

getScofMean in interface CoOccurrenceFrequencyMatrix

getScofStddev

public double getScofStddev()

Returns the standard deviation of all self co-occurrence frequency values. This value is called $\sigma_S$ in Shufelt's paper. This value is determined once within a call to computeStatistics().

Specified by:

getScofStddev in interface CoOccurrenceFrequencyMatrix

Returns:

standard deviation for pairs

getScofSum

public double getScofSum()

Return the sum of mean and standard deviation of the self co-occurrence frequency values. Assumes that computeStatistics() has been called already.

Specified by:

getScofSum in interface CoOccurrenceFrequencyMatrix

Returns:

sum of mean and standard deviation of the self co-occurrence frequency values