Discrete wavelet analysis

[Helios de Rosario]

Hi,

I'm interested in multiresolution analysis with wavelets in Octave. My
starting point is some routines that use functions from Matlab's Wavelet
Toolbox, so things would be easier if there were some package for Octave
that defines them.

However, I'm not sure what is the current situation in relation to this
topic. I have read recommendations to using WaveLab, or the package
ltfat, that implement a wide array of functions to work with wavelets.
That might be ok for my purposes, although the transition from Matlab
would not be that straightforward.

I have failed to understand if the Octave community generally sees such
packages as something like a "definitive" alternative to Matlab's
wavelet toolbox, or it is just that a more "clonic" alternative is still
not available, and in the meanwhile they are the best/more convenient
tools to work with.

I guess it may be the latter case, since the signal package contains
the functions "dwt", "idwt" with identical definition as the ones of
Matlab's package, although they are not still fully functional, since
the function "wfilters" called by them is missing, at least until Octave
3.8. I'm also aware of the project for a wavelet package here, with
"wfilters" and other functions:
http://sourceforge.net/p/octave/wavelet/ci/default/tree/
but it's not still published in Octave Forge.

All in all, I would like to know what is the situation regarding this.
Depending on the skills and background needed to complete that work, I
would be willing to contribute to it, if there is work to be assigned.

If this question is already solved elsewhere, or should be moved to
octave-maintainers or wherever, please tell me.

Best regards
Helios De Rosario


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