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Evaluation of amplitude encoded fringe patterns using the bidimensional empirical mode decomposition and the 2D Hilbert transform generalizations |
Applied Optics, Vol. 50, Issue 28, pp. 5513-5523 (2011)
http://dx.doi.org/10.1364/AO.50.005513
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Abstract
We propose an application for a bidimensional empirical mode decomposition and a Hilbert transform algorithm (BEMD-HT) in processing amplitude modulated fringe patterns. In numerical studies we investigate the influence of parameters of the algorithm and a fringe pattern under study on the demodulation results to optimize the procedure. A spiral phase method and the angle-oriented partial Hilbert transform are introduced to the BEMD-HT and tested. A postprocessing filtration method for BEMD-HT is proposed. Results of processing experimental data, such as vibration mode patterns obtained by time-average interferometry, correspond richly with numerical findings. They compare very well with the results of our previous investigations using the temporal phase-shifting (TPS) method and the continuous wavelet transform (CWT). Not needing to perform phase-shifting represents significant simplification of the experimental procedure in comparison with the TPS method.
© 2011 Optical Society of America
OCIS Codes
(100.2650) Image processing : Fringe analysis
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: May 12, 2011
Revised Manuscript: July 14, 2011
Manuscript Accepted: July 14, 2011
Published: September 30, 2011
Citation
M. Wielgus and K. Patorski, "Evaluation of amplitude encoded fringe patterns using the bidimensional empirical mode decomposition and the 2D Hilbert transform generalizations," Appl. Opt. 50, 5513-5523 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-28-5513
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