Class QuantizeProcessor.DitherFilter

java.lang.Object

nom.tam.fits.compression.algorithm.quant.QuantizeProcessor.PixelFilter

nom.tam.fits.compression.algorithm.quant.QuantizeProcessor.DitherFilter

Enclosing class:

QuantizeProcessor

private class QuantizeProcessor.DitherFilter
extends QuantizeProcessor.PixelFilter

Field Summary

Fields

Modifier and Type	Field	Description
private int	iseed
private static final int	LAST_RANDOM_VALUE
private static final double	MAX_INT_AS_DOUBLE
private static final int	N_RANDOM	DO NOT CHANGE THIS; used when quantizing real numbers
private int	nextRandom
private static final int	RANDOM_MULTIPLICATOR
private static final double	RANDOM_START_VALUE
private final double[]	randomValues

Constructor Summary

Constructors

Constructor	Description
DitherFilter(long seed)

Method Summary

Modifier and Type	Method	Description
void	initialize(long ditherSeed)
private double[]	initRandoms()
protected void	nextPixel()
double	nextRandom()
protected double	toDouble(int pixel)
protected int	toInt(double pixel)

Methods inherited from class Object

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

Field Details

LAST_RANDOM_VALUE

private static final int LAST_RANDOM_VALUE

See Also:

• Constant Field Values

MAX_INT_AS_DOUBLE

private static final double MAX_INT_AS_DOUBLE

See Also:

• Constant Field Values

N_RANDOM

private static final int N_RANDOM

DO NOT CHANGE THIS; used when quantizing real numbers

See Also:

• Constant Field Values

RANDOM_MULTIPLICATOR

private static final int RANDOM_MULTIPLICATOR

See Also:

• Constant Field Values

RANDOM_START_VALUE

private static final double RANDOM_START_VALUE

See Also:

• Constant Field Values

iseed

private int iseed

nextRandom

private int nextRandom

randomValues

private final double[] randomValues

Constructor Details

DitherFilter

DitherFilter(long seed)

Method Details

initialize

public void initialize(long ditherSeed)

nextRandom

public double nextRandom()

initRandoms

private double[] initRandoms()

nextPixel

protected void nextPixel()

Overrides:

nextPixel in class QuantizeProcessor.PixelFilter

toDouble

protected double toDouble(int pixel)

Overrides:

toDouble in class QuantizeProcessor.PixelFilter

toInt

protected int toInt(double pixel)

Overrides:

toInt in class QuantizeProcessor.PixelFilter