Novel method to construct a quality map for phase unwrapping based on modulation and the phase gradient

A novel method to construct a quality map, called modulation-phase-gradient variance (MPGV), is proposed, based on modulation and the phase gradient. The MPGV map is successfully applied to two phase-unwrapping algorithms - the improved weighted least square and the quality-guided unwrapping algorithm. Both simulated and experimental data testify to the validity of our proposed quality map. Moreover, the unwrapped-phase results show that the new quality map can have higher reliability than the conventional phase-derivative variance quality map in helping to unwrap noisy, low-modulation, and/or discontinuous phase maps. (c) 2006 Society of Photo-Optical Instrumentation Engineers.

[1]  Wei Xu,et al.  A region growing algorithm for InSAR phase unwrapping , 1996, IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium.

[2]  T. J. Flynn,et al.  Consistent 2-D phase unwrapping guided by a quality map , 1996, IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium.

[3]  Yimei Zhu,et al.  Deterministic phase unwrapping in the presence of noise. , 2003, Optics letters.

[4]  Louis A. Romero,et al.  A Cellular Automata Method for Phase Unwrapping , 1986, Topical Meeting On Signal Recovery and Synthesis II.

[5]  D. Malacara.  Optical Shop Testing , 1978 .

[6]  C. Werner,et al.  Satellite radar interferometry: Two-dimensional phase unwrapping , 1988 .

[7]  Xianyu Su,et al.  Reliability-guided phase unwrapping algorithm: a review ☆ , 2004 .

[8]  Thomas J. Flynn,et al.  TWO-DIMENSIONAL PHASE UNWRAPPING WITH MINIMUM WEIGHTED DISCONTINUITY , 1997 .

[9]  Louis A. Romero,et al.  Robust two-dimensional weighted and unweighted phase unwrapping that uses fast transforms and iterative methods , 1994 .

[10]  Dennis C. Ghiglia,et al.  Two-Dimensional Phase Unwrapping: Theory, Algorithms, and Software , 1998 .

[11]  Xianyu Su,et al.  Phase unwrapping algorithm based on phase fitting reliability in structured light projection , 2002 .

[12]  Guillermo H. Kaufmann,et al.  Unwrapping of electronic speckle pattern interferometry phase maps: evaluation of an iterative weighted algorithm , 1998 .

[13]  S Stramaglia,et al.  Mean-field annealing for phase unwrapping. , 1999, Applied optics.