title: A Laser Line Auto-Scanning System for Underwater 3D Reconstruction.
abstract: In this study, a laser line auto-scanning system was designed to perform underwater close-range 3D reconstructions with high accuracy and resolution. The system changes the laser plane direction with a galvanometer to perform automatic scanning and obtain continuous laser strips for underwater 3D reconstruction. The system parameters were calibrated with the homography constraints between the target plane and image plane. A cost function was defined to optimize the galvanometer's rotating axis equation. Compensation was carried out for the refraction of the incident and emitted light at the interface. The accuracy and the spatial measurement capability of the system were tested and analyzed with standard balls under laboratory underwater conditions, and the 3D surface reconstruction for a sealing cover of an underwater instrument was proved to be satisfactory.
authors.affiliation: Engineering College, Ocean University of China, 238 Songling Road, Qingdao 266100, China. chishukai@ouc.edu.cn.
authors.forename: Shukai
authors.initials: S
authors.lastname: Chi
authors.affiliation: Engineering College, Ocean University of China, 238 Songling Road, Qingdao 266100, China. xiezexiao@ouc.edu.cn.
authors.forename: Zexiao
authors.initials: Z
authors.lastname: Xie
authors.affiliation: Engineering College, Ocean University of China, 238 Songling Road, Qingdao 266100, China. 2002114@ouc.edu.cn.
authors.forename: Wenzhu
authors.initials: W
authors.lastname: Chen
keywords: auto-scanning; laser line system; underwater 3D reconstruction