be.tarsos.dsp.wavelet.lift

Class Daubechies4Wavelet

java.lang.Object

be.tarsos.dsp.wavelet.lift.LiftingSchemeBaseWavelet

be.tarsos.dsp.wavelet.lift.Daubechies4Wavelet

public class Daubechies4Wavelet
extends LiftingSchemeBaseWavelet

Author:

Ian Kaplan

Constructor Summary

Constructors

Constructor and Description
Daubechies4Wavelet()

Method Summary

Modifier and Type	Method and Description
void	forwardTrans(float[] vec) Simple wavelet Lifting Scheme forward transform
void	inverseTrans(float[] vec) Default two step Lifting Scheme inverse wavelet transform

Methods inherited from class java.lang.Object

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

Constructor Detail

Daubechies4Wavelet

public Daubechies4Wavelet()

Method Detail

forwardTrans

public void forwardTrans(float[] vec)

Description copied from class: LiftingSchemeBaseWavelet

Simple wavelet Lifting Scheme forward transform

forwardTrans is passed an array of doubles. The array size must be a power of two. Lifting Scheme wavelet transforms are calculated in-place and the result is returned in the argument array.

The result of forwardTrans is a set of wavelet coefficients ordered by increasing frequency and an approximate average of the input data set in vec[0]. The coefficient bands follow this element in powers of two (e.g., 1, 2, 4, 8...).

Overrides:

forwardTrans in class LiftingSchemeBaseWavelet

Parameters:

vec - the vector

inverseTrans

public void inverseTrans(float[] vec)

Default two step Lifting Scheme inverse wavelet transform

inverseTrans is passed the result of an ordered wavelet transform, consisting of an average and a set of wavelet coefficients. The inverse transform is calculated in-place and the result is returned in the argument array.

Overrides:

inverseTrans in class LiftingSchemeBaseWavelet

Parameters:

vec - the vector