midwt.m
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- function [y,L] = midwt(x,h,L);
- % [x,L] = midwt(y,h,L);
- %
- % Function computes the inverse discrete wavelet transform x for a 1D or
- % 2D input signal y using the scaling filter h.
- %
- % Input:
- % y : finite length 1D or 2D input signal (implicitly periodized)
- % (see function mdwt to find the structure of y)
- % h : scaling filter
- % L : number of levels. In the case of a 1D signal, length(x) must be
- % divisible by 2^L; in the case of a 2D signal, the row and the
- % column dimension must be divisible by 2^L. If no argument is
- % specified, a full inverse DWT is returned for maximal possible
- % L.
- %
- % Output:
- % x : periodic reconstructed signal
- % L : number of decomposition levels
- %
- % 1D Example:
- % xin = makesig('LinChirp',8);
- % h = daubcqf(4,'min');
- % L = 1;
- % [y,L] = mdwt(xin,h,L);
- % [x,L] = midwt(y,h,L)
- %
- % 1D Example's output:
- %
- % x = 0.0491 0.1951 0.4276 0.7071 0.9415 0.9808 0.6716 0.0000
- % L = 1
- %
- % See also: mdwt, mrdwt, mirdwt
- %
- %
- %
- %File Name: midwt.m
- %Last Modification Date: 08/07/95 15:13:52
- %Current Version: midwt.m 2.4
- %File Creation Date: Wed Oct 19 10:51:58 1994
- %Author: Markus Lang <lang@jazz.rice.edu>
- %
- %Copyright (c) 2000 RICE UNIVERSITY. All rights reserved.
- %Created by Markus Lang, Department of ECE, Rice University.
- %
- %This software is distributed and licensed to you on a non-exclusive
- %basis, free-of-charge. Redistribution and use in source and binary forms,
- %with or without modification, are permitted provided that the following
- %conditions are met:
- %
- %1. Redistribution of source code must retain the above copyright notice,
- % this list of conditions and the following disclaimer.
- %2. Redistribution in binary form must reproduce the above copyright notice,
- % this list of conditions and the following disclaimer in the
- % documentation and/or other materials provided with the distribution.
- %3. All advertising materials mentioning features or use of this software
- % must display the following acknowledgment: This product includes
- % software developed by Rice University, Houston, Texas and its contributors.
- %4. Neither the name of the University nor the names of its contributors
- % may be used to endorse or promote products derived from this software
- % without specific prior written permission.
- %
- %THIS SOFTWARE IS PROVIDED BY WILLIAM MARSH RICE UNIVERSITY, HOUSTON, TEXAS,
- %AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
- %BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- %FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RICE UNIVERSITY
- %OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- %EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- %PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- %OR BUSINESS INTERRUPTIONS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- %WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- %OTHERWISE), PRODUCT LIABILITY, OR OTHERWISE ARISING IN ANY WAY OUT OF THE
- %USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- %
- %For information on commercial licenses, contact Rice University's Office of
- %Technology Transfer at techtran@rice.edu or (713) 348-6173
- %
- %Change History:
- %
- %Modification #1
- %Mon Aug 7 11:52:33 CDT 1995
- %Rebecca Hindman <hindman@ece.rice.edu>
- %Added L to function line so that it can be displayed as an output
- %
- %Thu Mar 2 13:07:11 CDT 2000
- %Ramesh Neelamani<neelsh@ece.rice.edu>
- %Revamped the help file
- %