Acta Photonica Sinica, Volume. 41, Issue 9, 1130(2012)
Phase Unwrapping Algorithm Based on Graph Cuts
In electronic speckle pattern interferometry (ESPI), the true phase is generally extracted by the phasestepping method, which can only get the wrapped phase. Before the phase can be used to provide quantitative information, the wrapped phase must be unwrapped. But ESPI fringe patterns are contaminated with high levels of speckle noise, the task of phase unwrapping remains a challenge. In this article, a novel phase unwrapping algorithm based on graphcuts is proposed, which treats the phase unwrapping problem as integer optimizations. By the method of energy minimization, the novel algorithm can accurately extract the phase from wrapped phase images containing large amount of noise without prefiltering. For the same simulated wrapped speckle phase map,the RMSE(root mean squared error) of the traditional MaskCuts and LeastSquare are respectively 11.707 6 and 4.977 5, while the new algorithm's RMSE is 0.9459.Numerical simulation and experimental results both verify the excellent antinoise performance of the new algorithm.
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WANG Jinjiang, WU Mingyun, LIU Yang, CHANG Tianyu, CHEN Yang. Phase Unwrapping Algorithm Based on Graph Cuts[J]. Acta Photonica Sinica, 2012, 41(9): 1130
Received: Apr. 20, 2012
Accepted: --
Published Online: Aug. 31, 2012
The Author Email: Jinjiang WANG (wjj@tju.edu.cn)