Phase retrieval from a single fringe pattern using Teager-Hilbert-Huang transform

Deepan Balakrishnan; C. Quan; C. J. Tay

doi:10.1117/12.2081237

4 March 2015 Phase retrieval from a single fringe pattern using Teager-Hilbert-Huang transform

Deepan Balakrishnan, C. Quan, C. J. Tay

Proceedings Volume 9302, International Conference on Experimental Mechanics 2014; 93020Q (2015) https://doi.org/10.1117/12.2081237
Event: International Conference on Experimental Mechanics 2014, 2014, Singapore, Singapore

Abstract

Phase retrieval techniques like phase-shifting method and Fourier-transform technique provides accurate phase distribution for static measurements. However, it is extremely difficult to use these techniques for dynamic measurement. In this paper, an automated fringe analysis technique to retrieve phase distribution from single fringe pattern is proposed. The proposed method uses Teager-Hilbert-Huang transform, which is based on empirical mode decomposition (EMD), vortex operator (VO) and Teager energy operator (TEO) for fringe demodulation. The proposed method is suitable for both static and dynamic measurements. In this method, a fringe pattern is normalized using EMD and VO generates a complex field of the signal. Finally TEO is used to obtain the phase and its phase derivatives map. Unlike traditional phase retrieval algorithms, this method provides unwrapped phase derivatives directly. Hence there is no need for a separate phase unwrapping process. The proposed method is validated using simulated fringe patterns and experimental data obtained from electronic speckle pattern interferometry (ESPI). The results show that this method determines the phase map and its derivatives from the single fringe pattern effectively.

Citation Download Citation

Deepan Balakrishnan, C. Quan, and C. J. Tay "Phase retrieval from a single fringe pattern using Teager-Hilbert-Huang transform", Proc. SPIE 9302, International Conference on Experimental Mechanics 2014, 93020Q (4 March 2015); https://doi.org/10.1117/12.2081237

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