NAME
Math::DWT::Wavelet::Haar - FIR lo- & hi-pass filter coefficients for the Haar wavelet.
VERSION
Version 0.022
SYNOPSIS
This module provides the lo- and hi-pass decomposition and reconstruction filter coefficients for the Haar wavelet. It is meant to be used with other Math::DWT modules:
use Math::DWT;
use Math::DWT::UDWT;
my $dwt = Math::DWT->new('Haar');
my $udwt = Math::DWT::UDWT->new('Haar');SUBROUTINES/METHODS
new()
The Haar wavelet module is unique among the other wavelet modules in that there is no "VAR" argument to new(). This method returns a Math::DWT::Wavelet::Haar object;
vars()
This method returns a list of possible choices for VAR when creating a new object, e.g.:
my @v = Math::DWT::Wavelet::Daubechies->vars();
print scalar(@v); # 20This method returns an empty array/arrayref for the Haar wavelet, since there are no options for VAR.
filters()
Depending on the context in which it is called, returns an array or an arrayref containing (lo_d, hi_d, lo_r, hi_r) - the set of filters which are defined with the instantiated object.
lo_d()
hi_d()
lo_r()
hi_r()
Returns the requested set of filter coefficients as either an array or arrayref, depending on calling context.
SEE ALSO
Math::DWT(3pm), Math::DWT::UDWT(3pm), Math::DWT::Wavelet::Daubechies(3pm), Math::DWT::Wavelet::Coiflet(3pm), Math::DWT::Wavelet::Symlet(3pm), Math::DWT::Wavelet::Biorthogonal(3pm), Math::DWT::Wavelet::ReverseBiorthogonal(3pm), Math::DWT::Wavelet::DiscreteMeyer(3pm), perl(1)
AUTHOR
Mike Kroh, <kroh at cpan.org>
BUGS
Please report any bugs or feature requests to bug-math-dwt-wavelet-haar at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Math-DWT-Wavelet-Haar. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
ACKNOWLEDGEMENTS
These wavelet filter coefficients were scraped from this site: http://wavelets.pybytes.com/.
LICENSE AND COPYRIGHT
Copyright 2016 Mike Kroh.
This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:
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