JSci.maths.wavelet

Class Cosine

java.lang.Object

JSci.maths.wavelet.MultiscaleFunction

JSci.maths.wavelet.Cosine

All Implemented Interfaces:

java.lang.Cloneable, NumericalConstants

public final class Cosine
extends MultiscaleFunction
implements NumericalConstants, java.lang.Cloneable

This class is used to be able to mix the wavelet and cosine transforms. It is in fact a normalised cosine.

Author:

Daniel Lemire

Field Summary

Fields inherited from interface JSci.maths.NumericalConstants

GAMMA, GOLDEN_RATIO, SQRT2, SQRT2PI, TWO_PI

Constructor Summary

Constructors

Constructor and Description
Cosine(int N0, int FREQ)

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	clone() Return a copy of this object
int	dimension() Tells you how many samples you'll get from this function
int	dimension(int jfin) Tells you how many samples you'll get from this function (will not depend on the parameter)
boolean	equals(java.lang.Object a) Check if another object is equal to this Cosine object
double[]	evaluate() Return as an array the sampled values of the function
double[]	evaluate(int j1) Return as an array the sampled values of the function
int	getFilterType() This method is used to compute how the number of scaling functions changes from on scale to the other.
int	getFrequency()
double	mass(double a, double b, int jfin) Compute the mass (integral)
java.lang.String	toString() Return a String representation of the object

Methods inherited from class JSci.maths.wavelet.MultiscaleFunction

mass

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Cosine

public Cosine(int N0,
      int FREQ)

Method Detail

toString

public java.lang.String toString()

Return a String representation of the object

Specified by:

toString in class MultiscaleFunction

equals

public boolean equals(java.lang.Object a)

Check if another object is equal to this Cosine object

Specified by:

equals in class MultiscaleFunction

getFrequency

public int getFrequency()

evaluate

public double[] evaluate()

Return as an array the sampled values of the function

dimension

public int dimension(int jfin)

Tells you how many samples you'll get from this function (will not depend on the parameter)

Specified by:

dimension in class MultiscaleFunction

dimension

public int dimension()

Tells you how many samples you'll get from this function

Specified by:

dimension in class MultiscaleFunction

clone

public java.lang.Object clone()

Return a copy of this object

Overrides:

clone in class MultiscaleFunction

evaluate

public double[] evaluate(int j1)

Return as an array the sampled values of the function

Specified by:

evaluate in class MultiscaleFunction

Parameters:

j - number of iterations (doesn't do anything)

mass

public double mass(double a,
          double b,
          int jfin)

Compute the mass (integral)

Overrides:

mass in class MultiscaleFunction

Parameters:

a - left boundary of the interval

b - right boundary of the interval

jfin - number of iterations to consider (precision)

getFilterType

public int getFilterType()

This method is used to compute how the number of scaling functions changes from on scale to the other. Basically, if you have k scaling function and a Filter of type t, you'll have 2*k+t scaling functions at the next scale (dyadic case). Notice that this method assumes that one is working with the dyadic grid while the method "previousDimension" define in the interface "Filter" doesn't.

Specified by:

getFilterType in class MultiscaleFunction