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Re: DSP - pattern search


From: Peter Norlindh
Subject: Re: DSP - pattern search
Date: Wed, 11 May 2011 16:36:57 +0200

Thank you for your most valuable replies!
 
I am not familiar with wavelets, but I shall look in to it now that I know to look for it.
 
The Fourier Transform might be an excellent foundation for the search.  However, both the amplitudes and angular frequencies can vary significantly and non-uniformly.  Comparing two characteristic sequencies, one might be longer in total and at the same time contain a peak segment that is shorter than the corresponding peak section in the other sequence. 
 
I know very little about it but I believe the FFT approach requires a clever search algorithm that can handle the fact that the occurances of the characteristic sequence vary in length among other things.
 
Are there more potentially interesting approaches?
 
Thanks!
 
/Peter

2011/5/11 Jordi Gutiérrez Hermoso <address@hidden>
On 11 May 2011 01:14, Marius Roets <address@hidden> wrote:

> I couldn't find one, but I managed to get Wavelab (for Matlab) working in
> Octave without too much trouble.

As I recall, the authors of Wavelab are friendly to Octave. After all,
righton the front page they talk about reproducible research and
revealing source, which is not a goal you can fully accomplish with
Matlab.

Anyways, if you had problems with Wavelab, do report them and they
might fix them for you, or submit patches to them and they might apply
them.

- Jordi G. H.


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