Acta Optica Sinica, Volume. 30, Issue 3, 733(2010)
Phase Extraction of an ESPI Fringe Pattern by Using Two-Dimensional Continuous Wavelet Transform
A method for phase extraction of an electronic speckle pattern interferometry (ESPI) fringe pattern based on two-dimensional (2D) continuous wavelet transform is presented. The phase of the fringe pattern is retrieved by detecting the 2D-wavelet ridges. By using a scanning strategy guided by the fringe frequencies,the problem of sign ambiguity could be avoided. The algorithm can deal with open-fringe patterns as well as closed-fringe patterns and it has a strong ability of speckle noise immunity. Simulation and experimental results show that the phase of the ESPI fringe patterns (open-fringe patterns or closed-fringe patterns) can be extracted successfully.
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Li Kai, Zhang Dazhi, Wang Jingjing, Zhang Dongsheng, Zhang Qingchuan. Phase Extraction of an ESPI Fringe Pattern by Using Two-Dimensional Continuous Wavelet Transform[J]. Acta Optica Sinica, 2010, 30(3): 733
Category: Image Processing
Received: Apr. 30, 2009
Accepted: --
Published Online: Mar. 11, 2010
The Author Email: Kai Li (likai@shu.edu.cn)