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Wavelet transform reassignment and the use of low-oscillation complex wavelets.

Addison, Paul, Morvidone, Marcela, Watson, James N and Clifton, David (2006) Wavelet transform reassignment and the use of low-oscillation complex wavelets. Mechanical Systems and Signal Processing, 20 (6). pp. 1429-1443. ISSN 0888-3270

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Abstract/Description

In this paper, we explore the use of new time-frequency reassignment tools for the enhancement of prominent features in the time-frequency plane of the wavelet transform. The reassignment method allows for the localisation of time-frequency and time-scale distributions. Here we outline the underlying theory of this relatively new method and apply it to the analysis of test signals. Thereafter the usefulness of the method is demonstrated by application to the analysis of sonic echo signals used in the non-destructive testing (NDT) of foundation piles. We find that the reassignment method, when combined with low oscillation complex wavelet-based transforms, offers potential in identifying highly localised pertinent features that were otherwise difficult resolve when using the standard scalogram/ridge representation.

Item Type: Article
Print ISSN: 0888-3270
Uncontrolled Keywords: Wavelets; NDT; Non-destructive testing; Sonic echo tests; Piles; Foundations; Civil engineering;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 600 Technology > 620 Engineering > 620 Engineering & allied operations
600 Technology > 620 Engineering > 624 Civil engineering
Library of Congress Subjects: Q Science > QA Mathematics
T Technology > TA Engineering (General). Civil engineering (General)
Item ID: 1946
Depositing User: RAE Import
Date Deposited: 20 Feb 2008 11:55
Last Modified: 21 Mar 2013 14:04
URI: http://researchrepository.napier.ac.uk/id/eprint/1946

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