java.lang.Object
- net.sourceforge.jiu.color.data.MemoryCoOccurrenceMatrix

All Implemented Interfaces:

CoOccurrenceMatrix
```
public class MemoryCoOccurrenceMatrix
extends Object
implements CoOccurrenceMatrix
```
This class stores a co-occurrence matrix, a two-dimensional array of int counters. The dimension is given to the constructor which allocates a corresponding array.
Caveat
Does not (realistically) work with 16 bit channels because it allocates dimension times dimension int values, resulting in an attempt to allocate 16 GB with 16 bit images (dimension=65,536). TODO: Implement more sophisticated class, creating counters on-demand.

Author:

Marco Schmidt

Field Summary

Fields
Modifier and Type Field Description

private int[] data

private int dimension

private int dimSquare

Constructor Summary

Constructors
Constructor Description

MemoryCoOccurrenceMatrix(int dimension)
Creates a new matrix that stores dimension times dimension int values in memory.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	Sets all counters to zero.
`int`	`getDimension()`	Returns the dimension of this matrix.
`int`	`getValue(int i, int j)`	Returns the matrix value at a given position.
`void`	`incValue(int i, int j)`	Increases the counter for pair (i, j) by one.
`void`	`setValue(int i, int j, int newValue)`	Sets the counter for pair (i, j) to a new value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - dimension
```
private final int dimension
```
  - dimSquare
```
private final int dimSquare
```
  - data
```
private final int[] data
```
- Constructor Detail
  - MemoryCoOccurrenceMatrix
```
public MemoryCoOccurrenceMatrix(int dimension)
```
    Creates a new matrix that stores dimension times dimension int values in memory. Given that array index values are of type int, this limits dimension to about 46000 (sqrt(Integer.MAX_VALUE). In practice, dimension leads to dimension times dimenstion times 4 bytes being allocated, so that memory available to the JVM may become a decisive factor.
    
    Parameters:
    
    dimension - the matrix' dimension, which is both the number of rows and columns
- Method Detail
  - clear
```
public void clear()
```
    Description copied from interface: CoOccurrenceMatrix
    
    Sets all counters to zero.
    
    Specified by:
    
    clear in interface CoOccurrenceMatrix
  - getDimension
```
public int getDimension()
```
    Description copied from interface: CoOccurrenceMatrix
    
    Returns the dimension of this matrix. This is the number of rows and columns.
    
    Specified by:
    
    getDimension in interface CoOccurrenceMatrix
    
    Returns:
    
    matrix dimension (larger than zero)
  - getValue
```
public int getValue(int i,
                    int j)
```
    Description copied from interface: CoOccurrenceMatrix
    
    Returns the matrix value at a given position.
    
    Specified by:
    
    getValue in interface CoOccurrenceMatrix
    
    Parameters:
    
    i - column index, from 0 to CoOccurrenceMatrix.getDimension() - 1
    
    j - row index, from 0 to CoOccurrenceMatrix.getDimension() - 1
  - incValue
```
public void incValue(int i,
                     int j)
              throws IllegalArgumentException
```
    Description copied from interface: CoOccurrenceMatrix
    
    Increases the counter for pair (i, j) by one. This method can be implemented by the call setValue(i, j, getValue(i, j) + 1);.
    
    Specified by:
    
    incValue in interface CoOccurrenceMatrix
    
    Parameters:
    
    i - column index, from 0 to CoOccurrenceMatrix.getDimension() - 1
    
    j - row index, from 0 to CoOccurrenceMatrix.getDimension() - 1
    
    Throws:
    
    IllegalArgumentException - for invalid index pairs (i, j)
  - setValue
```
public void setValue(int i,
                     int j,
                     int newValue)
```
    Description copied from interface: CoOccurrenceMatrix
    
    Sets the counter for pair (i, j) to a new value.
    
    Specified by:
    
    setValue in interface CoOccurrenceMatrix
    
    Parameters:
    
    i - column index, from 0 to CoOccurrenceMatrix.getDimension() - 1
    
    j - row index, from 0 to CoOccurrenceMatrix.getDimension() - 1

Modifier and Type	Field	Description
`private int[]`	`data`
`private int`	`dimension`
`private int`	`dimSquare`

Class MemoryCoOccurrenceMatrix

Caveat

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

dimension

dimSquare

data

Constructor Detail

MemoryCoOccurrenceMatrix

Method Detail

clear

getDimension

getValue

incValue

setValue