CADI.Common.LogicalTarget.JPEG2000.Detransform
Class Dequantization

java.lang.Object
  CADI.Common.LogicalTarget.JPEG2000.Detransform.Dequantization

public class Dequantization
extends java.lang.Object

This class receives an image and performs the dead zone dequantization defined in JPEG2000 standard. This class can be used for the ranging stage defined for lossless compression too.
Usage example:
construct
setParameters
run

Version:

1.0 2007/12/08

Author:

Group on Interactive Coding of Images (GICI)

Field Summary

private float[][][]	finalImageSamples
private int[]	gain Log_2 gain bits for each subband (LL, HL, LH, HH).
private int[][][]	imageSamples Definition in JPEG2KLogicalTarget.imageSamplesFloat
private boolean	parametersSet To know if parameters are set.
private int[]	QComponentsBits Definition in SIZParameters.precision
private int[][][]	QExponents Definition in QCDParameters.QExponents
private int[][][]	QMantisas Definition in QCDParameters.QMantisas
private float	QReconstruction Reconstruction parameter used to adjust better the dequantitzation process (when QTypes == 1).
private int[]	QTypes Definition in QCDParameters.QTypes
private int[]	WTLevels Definition in CODParameters.WTLevels
private int	xSize Definition in SIZParameters.xSize
private int	ySize Definition in SIZParameters.ySize
private int	zSize Definition in SIZParameters.zSize

Constructor Summary

Dequantization(int[][][] imageSamples, float[][][] dstImageSamples)
Constructor that receives the original image samples.

Method Summary

void	list(java.io.PrintStream out) Prints this Dequantization's fields to the specified output stream.
float[][][]	run() Performs the dequantization to desired components.
void	setParameters(int[] WTLevels, int[] QTypes, int[] QComponentsBits, int[][][] QExponents, int[][][] QMantisas, float QReconstruction) Set the parameters used to do the dequantization.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

imageSamples

private int[][][] imageSamples

Definition in JPEG2KLogicalTarget.imageSamplesFloat

zSize

private int zSize

Definition in SIZParameters.zSize

ySize

private int ySize

Definition in SIZParameters.ySize

xSize

private int xSize

Definition in SIZParameters.xSize

WTLevels

private int[] WTLevels

Definition in CODParameters.WTLevels

QTypes

private int[] QTypes

Definition in QCDParameters.QTypes

QComponentsBits

private int[] QComponentsBits

Definition in SIZParameters.precision

QExponents

private int[][][] QExponents

Definition in QCDParameters.QExponents

QMantisas

private int[][][] QMantisas

Definition in QCDParameters.QMantisas

QReconstruction

private float QReconstruction

Reconstruction parameter used to adjust better the dequantitzation process (when QTypes == 1).

Recommened values between 0 to 1.

gain

private final int[] gain

Log_2 gain bits for each subband (LL, HL, LH, HH).

Constant values.

parametersSet

private boolean parametersSet

To know if parameters are set.

True indicates that they are set otherwise false.

finalImageSamples

private float[][][] finalImageSamples

Constructor Detail

Dequantization

public Dequantization(int[][][] imageSamples,
                      float[][][] dstImageSamples)

Constructor that receives the original image samples.

Parameters:

imageSamples - definition in imageSamples

dstImageSamples - definition in finalImageSamples

Method Detail

setParameters

public void setParameters(int[] WTLevels,
                          int[] QTypes,
                          int[] QComponentsBits,
                          int[][][] QExponents,
                          int[][][] QMantisas,
                          float QReconstruction)

Set the parameters used to do the dequantization.

Parameters:

WTLevels - definition in WTLevels

QTypes - definition in QTypes

QComponentsBits - definition in QComponentsBits

QExponents - definition in QExponents

QMantisas - definition in QMantisas

QReconstruction - definition in QReconstruction

run

public float[][][] run()
                throws ErrorException

Performs the dequantization to desired components.

Returns:

a 3D float array that contains the dequantized image

Throws:

ErrorException - when parameters are not set or unrecognized colour transform is passed

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

list

public void list(java.io.PrintStream out)

Prints this Dequantization's fields to the specified output stream. This method is useful for debugging.

Parameters:

out - an output stream.