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.
Bibliographical noteFunding 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.
© 2016 Optical Society of America.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics