For optical interferometry, a new quality-guided phase unwrapping algorithm based on the reliability evaluation of each pixel of the wrapped phase is proposed. First, the parameters used as quality measures in the past quality-guided algorithms are classified into the reliability measure and the quality measure, and the intensity of the object image belongs to the reliability measure. Then, by computing and applying a threshold to the intensity of the object image, the valid region (i.e., the interference region) is distinguished into the reliable region and the doubtful region. The wrapped phase in the reliable region is subsequently unwrapped by the way of multipaths integration, and different paths are guided by separate quality measures. Finally, starting from the reliable region, the doubtful region is unwrapped by the way that each path takes in the reliable region. Experimental results have shown that the proposed algorithm not only performs well, but also computes efficiently.
© 2011 Optical Society of America
Original Manuscript: April 29, 2011
Revised Manuscript: July 26, 2011
Manuscript Accepted: August 16, 2011
Published: September 26, 2011
Suping Fang, Lei Meng, Leijie Wang, Pengcheng Yang, and Masaharu Komori, "Quality-guided phase unwrapping algorithm based on reliability evaluation," Appl. Opt. 50, 5446-5452 (2011)