Fringe pattern analysis using a one-dimensional modified Morlet continuous wavelet transform

Abdulbasit Z. Abid; Munther A. Gdeisat; David R. Burton; Michael J. Lalor; Hussein S. Abdul-Rahman; Francis Lilley

doi:10.1117/12.781677

25 April 2008 Fringe pattern analysis using a one-dimensional modified Morlet continuous wavelet transform

Abdulbasit Z. Abid, Munther A. Gdeisat, David R. Burton, Michael J. Lalor, Hussein S. Abdul-Rahman, Francis Lilley

Proceedings Volume 7000, Optical and Digital Image Processing; 70000Q (2008) https://doi.org/10.1117/12.781677
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

This paper proposes the use of a modified Morlet wavelet in order to demodulate fringe patterns in conjunction with the one-dimensional continuous wavelet transform (1D-CWT). Our investigations demonstrate that the modified Morlet wavelet produces better results compared to the conventional Morlet wavelet when used in fringe pattern analysis. This novel technique offers superior performance in analysing fringe patterns from objects that exhibit large height variations. This new technique has been used in conjunction with the direct maximum ridge extraction algorithm and an improvement in performance is observed. The algorithm has been tested using both computer-generated and real fringe patterns; and was found to be suitable for fringe pattern demodulation and robust in operation.

Citation Download Citation

Abdulbasit Z. Abid, Munther A. Gdeisat, David R. Burton, Michael J. Lalor, Hussein S. Abdul-Rahman, and Francis Lilley "Fringe pattern analysis using a one-dimensional modified Morlet continuous wavelet transform", Proc. SPIE 7000, Optical and Digital Image Processing, 70000Q (25 April 2008); https://doi.org/10.1117/12.781677

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