Re: Daubechies-4 wavelet transform in MATLAB

Article View: comp.dsp

Article #2641

#2641

From: Rune Allnor
Date: Wed, 14 Apr 2010 21:10

17 lines
2181 bytes

On 14 apr, 23:04, Mariya <mariya.nago...@gmail.com> wrote:
> Hello:
>
> I have a 4x4 matrix which I wish to decompose into 4 frequency bands
> (LL, HL, LH, HH where L=low, H=high) by using a one-level Daubechies-4
> wavelet transform. As a result of the transform, each band should
> contain 2x2 coefficients. How can I do this in MATLAB? I know that
> MATLAB has dbaux and dbwavf functions. However, I'm not sure how to
> use them and I also don't have the wavelet toolbox.

Well, both those functions are from the wavelet toolbox,
so getting that toolbox would be an obvious starting point.
Once you get it, there is a chance that there is some
documentation included, which might help explain how to
use the functions...

Rune

Technical Details

Message-ID: <346440f8-043c-44f6-90fc-466770c3c414@u31g2000yqb.googlegroups.com>

Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!u31g2000yqb.googlegroups.com!not-for-mail

References: <d0b88b3b-2928-42a5-83d7-9a65df4eb304@x42g2000vba.googlegroups.com>

Show Full Headers

Complete Article Headers

X-Google-Thread: f8fcc,3fd0ec1c060932fd
X-Google-NewGroupId: yes
X-Google-Thread: 1087fe,3fd0ec1c060932fd
X-Google-NewGroupId: yes
X-Google-Attributes: gid691ad26926,gid757ff2eec8,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!u31g2000yqb.googlegroups.com!not-for-mail
From: Rune Allnor <allnor@tele.ntnu.no>
Newsgroups: comp.dsp,free.it.comp.lang.matlab
Subject: Re: Daubechies-4 wavelet transform in MATLAB
Date: Wed, 14 Apr 2010 14:10:36 -0700 (PDT)
Organization: http://groups.google.com
Lines: 17
Message-ID: <346440f8-043c-44f6-90fc-466770c3c414@u31g2000yqb.googlegroups.com>
References: <d0b88b3b-2928-42a5-83d7-9a65df4eb304@x42g2000vba.googlegroups.com>
NNTP-Posting-Host: 77.16.134.252
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
X-Trace: posting.google.com 1271279436 20628 127.0.0.1 (14 Apr 2010 21:10:36 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Wed, 14 Apr 2010 21:10:36 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: u31g2000yqb.googlegroups.com; posting-host=77.16.134.252; 
 posting-account=VAp5gAkAAAAmkCze5hvZtMeedpZWNthI
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; 
 Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022;
 .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322),gzip(gfe)

Reply to Parent Message