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hlwt.m
Package: wavelet_toolbox.rar [view]
Upload User: haiyisale
Upload Date: 2013-01-09
Package Size: 3246k
Code Size: 1k
Category:
Wavelet
Development Platform:
Matlab
- function [a,d] = hlwt(x,integerFlag)
- %HLWT Haar (Integer) Wavelet decomposition 1-D using lifting.
- %
- % [a,d] = hlwt(x) or
- % [a,d] = hlwt(x,integerFlag)
- % Dans le cas 2, on a une transformation en entiers
- % modulo la normalisation.
- % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 28-Jan-2000.
- % Last Revision 16-Jun-2003.
- % Copyright 1995-2004 The MathWorks, Inc.
- % $Revision: 1.1.6.3 $ $Date: 2004/04/13 00:39:38 $
- % Test si transformation en entiers.
- notInteger = nargin<2;
- % Splitting.
- a = x(2:2:end);
- d = x(1:2:end);
- % Lifting.
- d = d-a; % Dual lifting.
- if notInteger
- a = (a+d/2); % Primal lifting.
- d = d/2; % Normalization.
- else
- a = (a+fix(d/2)); % Primal lifting.
- end