Two-dimensional continuous wavelet transform for phase determination of complex interferograms

作者：Jun Ma, Zhaoyang Wang, Bing Pan, Thang M. Hoang, Minh Vo, Long Luu · 发表于：Applied Optics · 年份：2011 · DOI：10.1364/ao.50.002425 · 被引用次数：55 · 研究领域：Optical measurement and interference techniques、Structural Health Monitoring Techniques、Welding Techniques and Residual Stresses

A robust two-dimensional continuous wavelet transform (2D-CWT) technique for interferogram analysis is presented. To cope with the phase determination ambiguity issue encountered in the analysis of complex interferograms, a phase determination rule is proposed according to the phase distribution continuity, and a frequency-guided scheme is employed to obtain the correct phase distribution following a conventional 2D-CWT analysis. The theories are given in details, and the validity of the proposed technique is verified by computer simulation and real experiments.