GiciTransform
Class InverseDWTCore

java.lang.Object
  GiciTransform.InverseDWTCore

public class InverseDWTCore
extends java.lang.Object

This class receives an arbitrary piece of a 3D transformed image and performs one level of the corresponded 3D discrete inverse wavelet transform. Usage example:
construct
setParameters
run
getImageSamples

Version:

1.0

Author:

Group on Interactive Coding of Images (GICI)

Field Summary

(package private) float[][][]	imageSamples Image samples (index meaning [z][y][x]).
(package private) boolean	parametersSet To know if parameters are set.
(package private) int	WTAxis Definition in ForwardDWTCore.WTAxis
(package private) int	WTTypes Definition in ForwardDWTCore.WTTypes
(package private) int	WTXRegionEnd Definition in ForwardDWTCore.WTXRegionEnd
(package private) int	WTXRegionStart Definition in ForwardDWTCore.WTXRegionStart
(package private) int	WTYRegionEnd Definition in ForwardDWTCore.WTYRegionEnd
(package private) int	WTYRegionStart Definition in ForwardDWTCore.WTYRegionStart
(package private) int	WTZRegionEnd Definition in ForwardDWTCore.WTZRegionEnd
(package private) int	WTZRegionStart Definition in ForwardDWTCore.WTZRegionStart

Constructor Summary

InverseDWTCore(float[][][] imageSamples)
Constructor, receives the transformed image samples.

Method Summary

private float[]	evenEvenFiltering(float[] src, int WTTypes) This function applies the DWT filter to a source with even length and even phase.
private float[]	evenOddFiltering(float[] src, int WTTypes) This function applies the DWT filter to a source with even length and odd phase.
private float[]	filtering(float[] src, int WTTypes, int WTLRegionStart) This function selects the way to apply the filter depending on the phase and the size of the source.
float[][][]	getImageSamples() Used to get the 3DWT detransformed image.
private float[]	oddEvenFiltering(float[] src, int WTTypes) This function applies the DWT filter to a source with odd length and even phase.
private float[]	oddOddFiltering(float[] src, int WTTypes) This function applies the DWT filter to a source with odd length and odd phase.
void	run() Performs the discrete inverse wavelete transform and returns the result image.
void	setImageSamples(float[][][] imageSamples) Used to set (or reset) the image over which the detransform is going to be applied.
void	setParameters(int WTTypes, int WTAxis) Set the parameters used to apply the discrete inverse wavelet transform, compact use, the transform is going to be applied by default on the whole image over the requested axis.
void	setParameters(int WTTypes, int WTAxis, int WTZRegionStart, int WTZRegionEnd, int WTYRegionStart, int WTYRegionEnd, int WTXRegionStart, int WTXRegionEnd) Set the parameters used to apply the discrete inverse wavelet transform.

Methods inherited from class java.lang.Object

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

Field Detail

imageSamples

float[][][] imageSamples

Image samples (index meaning [z][y][x]).

WTTypes

int WTTypes

Definition in ForwardDWTCore.WTTypes

WTAxis

int WTAxis

Definition in ForwardDWTCore.WTAxis

WTZRegionStart

int WTZRegionStart

Definition in ForwardDWTCore.WTZRegionStart

WTZRegionEnd

int WTZRegionEnd

Definition in ForwardDWTCore.WTZRegionEnd

WTYRegionStart

int WTYRegionStart

Definition in ForwardDWTCore.WTYRegionStart

WTYRegionEnd

int WTYRegionEnd

Definition in ForwardDWTCore.WTYRegionEnd

WTXRegionStart

int WTXRegionStart

Definition in ForwardDWTCore.WTXRegionStart

WTXRegionEnd

int WTXRegionEnd

Definition in ForwardDWTCore.WTXRegionEnd

parametersSet

boolean parametersSet

To know if parameters are set.

True indicates that they are set otherwise false.

Constructor Detail

InverseDWTCore

public InverseDWTCore(float[][][] imageSamples)

Constructor, receives the transformed image samples.

Parameters:

imageSamples - definition in imageSamples

Method Detail

setParameters

public void setParameters(int WTTypes,
                          int WTAxis)

Set the parameters used to apply the discrete inverse wavelet transform, compact use, the transform is going to be applied by default on the whole image over the requested axis.

Parameters:

WTTypes - definition in WTTypes

WTAxis - definition in WTAxis

setParameters

public void setParameters(int WTTypes,
                          int WTAxis,
                          int WTZRegionStart,
                          int WTZRegionEnd,
                          int WTYRegionStart,
                          int WTYRegionEnd,
                          int WTXRegionStart,
                          int WTXRegionEnd)

Set the parameters used to apply the discrete inverse wavelet transform.

Parameters:

WTTypes - definition in WTTypes

WTAxis - definition in WTAxis

WTZRegionStart - definition in WTZRegionStart

WTZRegionEnd - definition in WTZRegionEnd

WTYRegionStart - definition in WTYRegionStart

WTYRegionEnd - definition in WTYRegionEnd

WTXRegionStart - definition in WTXRegionStart

WTXRegionEnd - definition in WTXRegionEnd

setImageSamples

public void setImageSamples(float[][][] imageSamples)

Used to set (or reset) the image over which the detransform is going to be applied.

Parameters:

imageSamples - definition in imageSamples

getImageSamples

public float[][][] getImageSamples()

Used to get the 3DWT detransformed image.

Returns:

the DWT image

run

public void run()
         throws ErrorException

Performs the discrete inverse wavelete transform and returns the result image.

Throws:

ErrorException - when parameters are not set, wavelet type is unrecognized or trying to detransform over an unimplemented axis

filtering

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

This function selects the way to apply the filter depending on the phase and the size of the source.

Parameters:

src - a float array of the image samples

WTTypes - Filter to apply

WTLRegionStart - The starting coordinate of the original line to transform, used to determine the starting phase.

Returns:

a float array that contains the detransformed sources

Throws:

ErrorException - when wavelet type is unrecognized

evenEvenFiltering

private float[] evenEvenFiltering(float[] src,
                                  int WTTypes)
                           throws ErrorException

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

Parameters:

src - a float array of the transformed image samples

WTTypes - Filter to apply

Returns:

a float array that contains the detransformed sources

Throws:

ErrorException - when wavelet type is unrecognized

evenOddFiltering

private float[] evenOddFiltering(float[] src,
                                 int WTTypes)
                          throws ErrorException

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

Parameters:

src - a float array of the image samples

WTTypes - Filter to apply

Returns:

a float array that contains the detransformed sources

Throws:

ErrorException - when wavelet type is unrecognized

oddEvenFiltering

private float[] oddEvenFiltering(float[] src,
                                 int WTTypes)
                          throws ErrorException

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

Parameters:

src - a float array of the image samples

WTTypes - Filter to apply

Returns:

a float array that contains the detransformed sources

Throws:

ErrorException - when wavelet type is unrecognized

oddOddFiltering

private float[] oddOddFiltering(float[] src,
                                int WTTypes)
                         throws ErrorException

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

Parameters:

src - a float array of the image samples

WTTypes - Filter to apply

Returns:

a float array that contains the detransformed sources

Throws:

ErrorException - when wavelet type is unrecognized