Paper
18 November 2019 A planar pattern based calibration method for high precision structured laser triangulation measurement
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Abstract
A flexible calibration method with high precision was proposed for calibration of structured laser triangulation in the applications of 3D reconstruction and point cloud processing. The camera coordinate system was chosen as the ultimate reference coordinate. In this calibration process, be required only a planar pattern placed at different orientations and positions for obtainment of the camera intrinsic parameters. And then two or more non-coplanar sets of three collinear points were calculated for the laser projection plane coefficients. A line laser triangulation measurement system is established, consisted of laser diode, cylindrical lens module and camera imaging system. Experimental results based on the constructed structured laser triangulation system revealed that accuracy of the profile measurement is less than ±0.005mm, which can meet the majority of industrial inspection applications.
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Ruiming Chen, Xinghui Li, Xiaohao Wang, Jianxiong Li, Gaopeng Xue, Qian Zhou, and Kai Ni "A planar pattern based calibration method for high precision structured laser triangulation measurement", Proc. SPIE 11189, Optical Metrology and Inspection for Industrial Applications VI, 1118914 (18 November 2019); https://doi.org/10.1117/12.2537757
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KEYWORDS
Calibration

Cameras

Imaging systems

Laser applications

Laser systems engineering

Semiconductor lasers

3D modeling

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