Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.814544
Title: The comparison of different temporal phase analysis algorithms in optical dynamic measurement
Authors: Miao, H.
Fu, Y. 
Keywords: Digital holography
Fourier analysis
Temporal phase extraction
Vibration measurement
Wavelet transform
Issue Date: 2008
Source: Miao, H., Fu, Y. (2008). The comparison of different temporal phase analysis algorithms in optical dynamic measurement. Proceedings of SPIE - The International Society for Optical Engineering 7155 : -. ScholarBank@NUS Repository. https://doi.org/10.1117/12.814544
Abstract: In recent years, optical interferometry has been applied to whole-field, non-contact measurement of vibrating or continuously-deforming objects. In optical dynamic measurement, an interferogram sequence is obtained by a high-speed camera. Retrieving dynamic phase values from this interferogram sequence leads to a precise measurement of different kinematic and deformation parameters of a continuously-deforming or vibrating object. In this paper, this interferogram sequence is classified into two types: (i) intensity variation; and (ii) exponential phase signal. Different temporal phase retrieving techniques, such as Hilbert transform, Fourier transform, windowed Fourier transform and wavelet transform are applied to extract the phase from a simulated signal. The advantage and drawback of each algorithm are discussed. In addition, a new method based on the combination of Fourier transform and windowed Fourier transform is proposed and the simulation shows it can eliminate the noise and evaluate the phase more accurately.
Source Title: Proceedings of SPIE - The International Society for Optical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/73928
ISBN: 9780819473981
ISSN: 0277786X
DOI: 10.1117/12.814544
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