Structured light field 3D imaging

• Published in: Optics express Vol. 24; no. 18; pp. 20324 - 20334
• Main Authors: Cai, Zewei, Liu, Xiaoli, Peng, Xiang, Yin, Yongkai, Li, Ameng, Wu, Jiachen, Gao, Bruce Z
• Format: Journal Article
• Language: English
• Published: United States 05.09.2016
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/OE.24.020324

In this paper, we propose a method by means of light field imaging under structured illumination to deal with high dynamic range 3D imaging. Fringe patterns are projected onto a scene and modulated by the scene depth then a structured light field is detected using light field recording devices. The structured light field contains information about ray direction and phase-encoded depth, via which the scene depth can be estimated from different directions. The multidirectional depth estimation can achieve high dynamic 3D imaging effectively. We analyzed and derived the phase-depth mapping in the structured light field and then proposed a flexible ray-based calibration approach to determine the independent mapping coefficients for each ray. Experimental results demonstrated the validity of the proposed method to perform high-quality 3D imaging for highly and lowly reflective surfaces.