Open AccessPixel-wise absolute phase unwrapping using geometric constraints of structured light system
Author(s) -
Yatong An,
Jae-Sang Hyun,
Song Zhang
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.018445
Subject(s) - pixel , absolute phase , projector , structured light , phase (matter) , computer science , artificial intelligence , optics , computer vision , structured light 3d scanner , physics , quantum mechanics , scanner
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.