Open AccessRapid on-site recalibration for binocular vision galvanometric laser scanning system
Author(s) -
Junchao Tu,
Liyan Zhang
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.032608
Subject(s) - calibration , optics , computer science , artificial intelligence , computer vision , laser scanning , laser , structured light , structured light 3d scanner , projection (relational algebra) , remote sensing , geology , mathematics , physics , algorithm , statistics , scanner
The binocular vision galvanometric laser scanning (BGLS) system, which consists of a traditional galvanometric laser scanning (GLS) system and a stereo vision system, is widely applied in various advanced manufacturing fields such as 3-dimensional (3D) laser cutting and 3D laser projection positioning. The BGLS system usually needs to be recalibrated before it is put to a certain use, since the camera parameters, as well as the relative pose between the camera and the GLS, may be changed with different applications. However, a full calibration of the BGLS system requires elaborate modeling and mass calibration data, which considerably affect the efficiency of the BGLS system. A rapid on-site recalibration method is proposed, which can substantially improve the efficiency and flexibility of the BGLS system. With the method, the BGLS system needs to be carefully off-site calibrated for only one time. The on-site precise recalibration can be quickly realized by taking only two images of the laser spots projected by the GLS on a planar board. Moreover, an ingenious linear solving method is proposed to make the whole computation process more stable and timesaving. On-site recalibration and target shooting experiments are respectively conducted to verify the proposed method.