smile.wavelet

Class Wavelet

java.lang.Object

smile.wavelet.Wavelet

Direct Known Subclasses:

BestLocalizedWavelet, CoifletWavelet, D4Wavelet, DaubechiesWavelet, HaarWavelet, SymletWavelet

public class Wavelet
extends java.lang.Object

A wavelet is a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero. Like the fast Fourier transform (FFT), the discrete wavelet transform (DWT) is a fast, linear operation that operates on a data vector whose length is an integer power of 2, transforming it into a numerically different vector of the same length. The wavelet transform is invertible and in fact orthogonal. Both FFT and DWT can be viewed as a rotation in function space.

Constructor Summary

Constructors

Constructor and Description
Wavelet(double[] coefficients) Constructor.

Method Summary

Modifier and Type	Method and Description
void	inverse(double[] a) Inverse discrete wavelet transform.
void	transform(double[] a) Discrete wavelet transform.

Methods inherited from class java.lang.Object

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

Constructor Detail

Wavelet

public Wavelet(double[] coefficients)

Constructor. Create a wavelet with given coefficients.

Method Detail

transform

public void transform(double[] a)

Discrete wavelet transform.

inverse

public void inverse(double[] a)

Inverse discrete wavelet transform.