Context-Based Modelling of Interferometric Signals for the Assessment of Tear-Film Suface Quality

Alonso-Caneiro, David, Szezesna, Dorota, Iskander, Robert, & Collins, Michael (2009) Context-Based Modelling of Interferometric Signals for the Assessment of Tear-Film Suface Quality. In IEEE Statistical Signal Processing, IEEE (Institute of Electrical and Electronics Engineers, Inc.), Cardiff , pp. 553-556.

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Abstract

Modelling of interferometric signals related to tear film surface quality is considered. In the context of tear film surface quality estimation in normal healthy eyes, two clinical parameters are of interest: the build-up time, and the average interblink surface quality. The former is closely related to the signal derivative while the latter to the signal itself. Polynomial signal models, chosen for a particular set of noisy interferometric measurements, can be optimally selected, in some sense, with a range of information criteria such as AIC, MDL, Cp, and CME. Those criteria, however, do not always guarantee that the true derivative of the signal is accurately represented and they often overestimate it. Here, a practical method for judicious selection of model order in a polynomial fitting to a signal is proposed so that the derivative of the signal is adequately represented. The paper highlights the importance of context-based signal modelling in model order selection.

Impact and interest:

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ID Code: 31142
Item Type: Conference Paper
Refereed: No
Keywords: model order selection, information criteria, signal derivative estimation
DOI: 10.1109/SSP.2009.5278515
ISBN: 978-1-4244-2709-3
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > QUT Faculties and Divisions > Faculty of Law
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2009 IEEE.
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 11 Mar 2010 06:01
Last Modified: 08 Jun 2016 05:55

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