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13 September 2012 A modified phase unwrapping algorithm based on phase filtering
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Abstract
The temporal phase unwrapping will become unstable, if fewer numbers of fringe patterns with different spatial frequencies are used. In this paper, we present a modified phase unwrapping method based on the phase filtering, which can be used to achieve correct phase-unwrapping with use of fewer numbers of fringe frequencies. An adaptive phase filter is designed according to the phase-jumping characteristics to eliminate the phase noise. The window size of the filter is adaptively determined according to the local noise levels. After filtering operation, we are able to obtain the approximate phase value with filtering errors. In order to further eliminate the filtering residual errors, we take unwrapping operation again to get the correct phase value. The simulation experimental results are also presented to validate our proposed approach.
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Hailong Chen, Xiaoli Liu, Yabin Ding, and Xiang Peng "A modified phase unwrapping algorithm based on phase filtering", Proc. SPIE 8494, Interferometry XVI: Applications, 84940P (13 September 2012); https://doi.org/10.1117/12.945218
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