31 January 2013 Filtering method for phase fringe patterns in the digital speckle pattern interferometry
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Proceedings Volume 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation; 87592A (2013) https://doi.org/10.1117/12.2014792
Event: International Symposium on Precision Engineering Measurement and Instrumentation 2012, 2012, Chengdu, China
Abstract
The phase fringe patterns obtained by the phase shifting technique are inherently full of speckle noise in Digital Speckle Pattern Interferometry (DSPI),. The phase fringe patterns filtering method is very important to obtain the precisely deformation information. In this paper a effective method for filtering the speckle noise of phase fringe patterns is applied, the method filter the discrete images which generated from phase fringe patterns instead of classical filtering phase fringe patterns directly. Comparing with existed filters method, it has a better performance on phase jump information preservation and does not have any blurring effect on the phase distribution providing the filtering is implemented on the equal-phase window. Moreover, its capability of noise reduction is more powerful. An optical measurement system based on DSPI is built to demonstrate the filtering method, and the experiment results have shown the effectiveness and advantages of the filter method.
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Yonghong Wang, Weihua Bu, Junrui Li, Jianfei Sun, Lianxiang Yang, "Filtering method for phase fringe patterns in the digital speckle pattern interferometry", Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 87592A (31 January 2013); doi: 10.1117/12.2014792; https://doi.org/10.1117/12.2014792
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