Re: Daubechies-4 wavelet transform in MATLAB

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Article #2642

#2642

From: Dirk Bell
Date: Thu, 15 Apr 2010 17:49

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On Apr 14, 5:10 pm, Rune Allnor <all...@tele.ntnu.no> wrote:
> 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

That is an expensive answer if it is gotten legitimately.

Cheaper solution, web search.

Dirk

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From: Dirk Bell <bellda2005@cox.net>
Newsgroups: comp.dsp,free.it.comp.lang.matlab
Subject: Re: Daubechies-4 wavelet transform in MATLAB
Date: Thu, 15 Apr 2010 10:49:21 -0700 (PDT)
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