Pixel-wise absolute phase unwrapping using geometric constraints of structured light system

Yatong An, Jae Sang Hyun, Song Zhang

Research output: Contribution to journalArticlepeer-review

167 Citations (Scopus)


This paper presents a method to unwrap phase pixel by pixel by solely using geometric constraints of the structured light system without requiring additional image acquisition or another camera. Specifically, an artificial absolute phase map, Φmin, at a given virtual depth plane z = zmin, is created from geometric constraints of the calibrated structured light system; the wrapped phase is pixel-by-pixel unwrapped by referring to Φmin. Since Φmin is defined in the projector space, the unwrapped phase obtained from this method is absolute for each pixel. Experimental results demonstrate the success of this proposed novel absolute phase unwrapping method.

Original languageEnglish
Pages (from-to)18445-18459
Number of pages15
JournalOptics Express
Issue number16
Publication statusPublished - 2016 Aug 8

Bibliographical note

Funding Information:
We would like to thank Beiwen Li, Chufan Jiang, and Bogdan Vlahov for proofreading and critiquing the entire paper. We also thank other students for their kind discussions. This study was sponsored by the National Science Foundation (NSF) under grant numbers CMMI-1521048. The views expressed in this paper are those of the authors and not necessarily those of the NSF.

Publisher Copyright:
© 2016 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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