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   -> Volume 7, Issue 5

Answer: Ridge and skeleton extraction (WD 7.4 #23)
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isar (

PostPosted: Thu May 21, 1998 6:53 am    
Subject: Answer: Ridge and skeleton extraction (WD 7.4 #23)
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#29 Answer: Ridge and skeleton extraction (WD 7.4 #23)

The question was:

> From: Natalya Hunter Williams <<>
> Subject: #23 Question: Ridge and skeleton extraction
> Dear all -
> I am working towards a PhD in Petroleum Engineering, and have
> been using wavelets (CWTs) to analyse petrophysical data for
> characteristic heterogeneity lengthscales indicative of a
> sedimentary control (using Matlab). I want to apply the ridge
> and skeleton method to extract the hierarchical wavelength
> information from the data. I'm looking for some freeware code
> which performs this operation. If you have some ideas about
> where I might find this, I'd be very grateful if you could let me
> know.

The answer is:

The WaveLab Toolbox of Matlab contains functions to compute the
continuous wavelet transform and to extract ridges and the skeleton.

These functions are CWT, BUildSkelMap and ExtractRidge.

You can download this Toolbox by anonymous FTP to The filnames are:

WaveLab0700.sea.hqx (for Mac)

WaveLab0700.tar.Z (for UNIX) (for MS-Windows).

Best whishes.

Alexandre Isar
Technical University Timisoara
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