GiciTransform
Class InverseWaveletTransform

java.lang.Object
  GiciTransform.InverseWaveletTransform

public class InverseWaveletTransform
extends java.lang.Object

This class receives an image and performs applies a discrete wavelet transform.
Usage example:
construct
setParameters
run

Version:

1.0

Author:

Group on Interactive Coding of Images (GICI)

Field Summary

(package private) float[][][]	imageSamples Original image samples (index meaning [z][y][x]).
(package private) boolean	parametersSet To know if parameters are set.
(package private) int[]	WTLevels DWT levels to apply for each component.
(package private) int[]	WTOrder To know the order of the transform in the spatial dimentions for each component
(package private) int[]	WTTypes Definition in ForwardWaveletTransform.WTTypes
(package private) int	xSize Image width.
(package private) int	ySize Image height.
(package private) int	zSize Number of image components.

Constructor Summary

InverseWaveletTransform(float[][][] imageSamples)
Constructor that receives the original image samples and initializes default values.

Method Summary

private float[]	evenFiltering(float[] src, int z) This function applies the DWT filter to a source with even length.
private float[]	filtering(float[] src, int z) This function selects the way to apply the filter selected depending on the size of the source
private float[]	oddFiltering(float[] src, int z) This function applies the DWT filter to a source with odd length.
float[][][]	run() Performs the discrete wavelete transform and returns the result image.
void	setParameters(int[] WTTypes, int[] WTLevels) Set the parameters used to apply the discrete wavelet transform, the order is set and cannot be selected..
void	setParameters(int[] WTTypes, int[] WTLevels, int[] WTOrder) Set the parameters used to apply the discrete wavelet transform when the order of the spatial dimentions can be chosen.
static boolean	verifyParameters(int[] WTType, int[] WTLevels, int[] WTOrder) Verify Parameters defined in this class

Methods inherited from class java.lang.Object

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

Field Detail

imageSamples

float[][][] imageSamples

Original image samples (index meaning [z][y][x]).

All values allowed.

zSize

int zSize

Number of image components.

Negative values are not allowed for this field.

ySize

int ySize

Image height.

Negative values are not allowed for this field.

xSize

int xSize

Image width.

Negative values are not allowed for this field.

WTTypes

int[] WTTypes

Definition in ForwardWaveletTransform.WTTypes

WTLevels

int[] WTLevels

DWT levels to apply for each component.

Negative values not allowed.

WTOrder

int[] WTOrder

To know the order of the transform in the spatial dimentions for each component

Valid values are:

• 0 - Horizontal - Verical
• 1 - Vertical - Horizontal
• 2 - Only horizontal

parametersSet

boolean parametersSet

To know if parameters are set.

True or false.

Constructor Detail

InverseWaveletTransform

public InverseWaveletTransform(float[][][] imageSamples)

Constructor that receives the original image samples and initializes default values.

Parameters:

imageSamples - a 3D float array that contains image samples

Method Detail

setParameters

public void setParameters(int[] WTTypes,
                          int[] WTLevels)

Set the parameters used to apply the discrete wavelet transform, the order is set and cannot be selected..

Parameters:

WTTypes - definition in this class

WTLevels - definition in this class

setParameters

public void setParameters(int[] WTTypes,
                          int[] WTLevels,
                          int[] WTOrder)

Set the parameters used to apply the discrete wavelet transform when the order of the spatial dimentions can be chosen.

Parameters:

WTTypes - definition in this class

WTLevels - definition in this class

WTOrder - definition in this class

verifyParameters

public static boolean verifyParameters(int[] WTType,
                                       int[] WTLevels,
                                       int[] WTOrder)

Verify Parameters defined in this class

Parameters:

WTType - defined in this class

WTLevels - defined in this class

WTOrder - definition in this class

Returns:

a boolean that indicates if the parameters are allowed

run

public float[][][] run()
                throws java.lang.Exception

Performs the discrete wavelete transform and returns the result image.

Returns:

a 3D float array that contains the DWT image

Throws:

java.lang.Exception

filtering

private float[] filtering(float[] src,
                          int z)
                   throws ErrorException

This function selects the way to apply the filter selected depending on the size of the source

Parameters:

src - a float array of the image samples

z - the component determines the filter to apply

Returns:

a float array that contains the tranformed sources

Throws:

ErrorException - when unrecognized wavelet type is passed

evenFiltering

private float[] evenFiltering(float[] src,
                              int z)
                       throws ErrorException

This function applies the DWT filter to a source with even length.

Parameters:

src - a float array of the image samples

z - the component determines the filter to apply

Returns:

a float array that contains the tranformed sources

Throws:

ErrorException - when unrecognized wavelet type is passed

oddFiltering

private float[] oddFiltering(float[] src,
                             int z)
                      throws ErrorException

This function applies the DWT filter to a source with odd length.

Parameters:

src - a float array of the image samples

z - the component determines the filter to apply

Returns:

a float array that contains the tranformed sources

Throws:

ErrorException - when unrecognized wavelet type is passed