JSci.maths.wavelet
Class Multiresolution
java.lang.Object
JSci.maths.wavelet.Multiresolution
- Direct Known Subclasses:
- CDF2_4, CDF3_5, Daubechies2, Daubechies3, Daubechies4, Daubechies5, Daubechies6, Daubechies7, Daubechies8, MultiSplineHaar
- public abstract class Multiresolution
- extends java.lang.Object
This class is used to encapsulate
the various wavelet multiresolution
(Dau2, Haar, ...). It assumes that
your are working with the dyadic case
and with real numbers.
It is meant to provide only the
most basic methods in order to be
as general as possible. Also,
for performance considerations,
this class should be as light as
possible. However, in practice, it
is useful to put most of the actual
implementation in a multiresolution
object instead of spreading it over
many objects.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Multiresolution
public Multiresolution()
getFilterType
public abstract 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.
primaryScaling
public abstract MultiscaleFunction primaryScaling(int n0,
int k)
dualScaling
public abstract MultiscaleFunction dualScaling(int n0,
int k)
primaryWavelet
public abstract MultiscaleFunction primaryWavelet(int n0,
int k)
dualWavelet
public abstract MultiscaleFunction dualWavelet(int n0,
int k)
previousDimension
public int previousDimension(int k)
- This method return the number of "scaling"
functions at the previous scale given a
number of scaling functions. The answer
is always smaller than the provided value
(about half since this is a dyadic
implementation). This relates to the same idea
as the "Filter type". It is used by
the interface "Filter".
If needed it should be
overwritten, in particular, for
performance considerations.