Package nom.tam.fits.compression.algorithm.quant

Class QuantizeProcessor

java.lang.Object

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

Direct Known Subclasses:

QuantizeProcessor.DoubleQuantCompressor, QuantizeProcessor.FloatQuantCompressor

public class QuantizeProcessor
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	QuantizeProcessor.BaseFilter
private class	QuantizeProcessor.DitherFilter
static class	QuantizeProcessor.DoubleQuantCompressor
static class	QuantizeProcessor.FloatQuantCompressor	TODO this is done very inefficient and should be refactored!
private class	QuantizeProcessor.NullFilter
private class	QuantizeProcessor.PixelFilter
private class	QuantizeProcessor.ZeroFilter

Field Summary

Fields

Modifier and Type	Field	Description
private double	bScale
private double	bZero
private boolean	centerOnZero
private static double	MAX_INT_AS_DOUBLE
private static long	N_RESERVED_VALUES	number of reserved values, starting with
private QuantizeProcessor.PixelFilter	pixelFilter
private Quantize	quantize
protected QuantizeOption	quantizeOption
private static double	ROUNDING_HALF
private static int	ZERO_VALUE	value used to represent zero-valued pixels

Constructor Summary

Constructors

Constructor	Description
QuantizeProcessor(QuantizeOption quantizeOption)

Method Summary

Modifier and Type	Method	Description
private void	calculateBZeroAndBscale()
Quantize	getQuantize()
private int	nint(double x)
boolean	quantize(double[] doubles, java.nio.IntBuffer quants)
void	quantize(java.nio.DoubleBuffer fdata, java.nio.IntBuffer intData)
void	unquantize(java.nio.IntBuffer intData, java.nio.DoubleBuffer fdata)
private double	zeroCenter()

Methods inherited from class java.lang.Object

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

Field Detail

MAX_INT_AS_DOUBLE

private static final double MAX_INT_AS_DOUBLE

See Also:

Constant Field Values

N_RESERVED_VALUES

private static final long N_RESERVED_VALUES

number of reserved values, starting with

See Also:

Constant Field Values

ROUNDING_HALF

private static final double ROUNDING_HALF

See Also:

Constant Field Values

ZERO_VALUE

private static final int ZERO_VALUE

value used to represent zero-valued pixels

See Also:

Constant Field Values

centerOnZero

private final boolean centerOnZero

pixelFilter

private final QuantizeProcessor.PixelFilter pixelFilter

bScale

private double bScale

bZero

private double bZero

quantize

private Quantize quantize

quantizeOption

protected final QuantizeOption quantizeOption

Constructor Detail

QuantizeProcessor

public QuantizeProcessor(QuantizeOption quantizeOption)

Method Detail

getQuantize

public Quantize getQuantize()

quantize

public boolean quantize(double[] doubles,
                        java.nio.IntBuffer quants)

quantize

public void quantize(java.nio.DoubleBuffer fdata,
                     java.nio.IntBuffer intData)

unquantize

public void unquantize(java.nio.IntBuffer intData,
                       java.nio.DoubleBuffer fdata)

calculateBZeroAndBscale

private void calculateBZeroAndBscale()

nint

private int nint(double x)

zeroCenter

private double zeroCenter()