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|Title:||The comparison of different temporal phase analysis algorithms in optical dynamic measurement|
Temporal phase extraction
|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|
|Appears in Collections:||Staff Publications|
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