校准
偏移量(计算机科学)
光学
激光扫描
平面的
平面(几何)
激光器
计算机科学
几何学
数学
物理
统计
计算机图形学(图像)
程序设计语言
作者
Xiangfeng Liu,Xiaohua Tong,Kuifeng Luan,Xu Wang,Rong Shi
标识
DOI:10.1088/1361-6501/ac7fde
摘要
Abstract The geometry and calibration of three-dimensional multi-beam laser scanning (MBLS) is more difficult than single-beam laser scanning, especially for a one laser emitter and multiple laser-echo detection within the same optical path and scanning with a two-axis-mirror. This paper focuses on the influence of the main systematic errors upon the geometric imagery of the MBLS, and presents a plane-based self-calibration method to improve the geometric positioning. First, the model for geometric imaging and systematic errors for the MBLS is presented, and the adjustment of the plane-based self-calibration is developed. Second, the influence of systematic errors upon geometric imagery of the MBLS is simulated and conducted to find the main errors. Third, a strong network configuration based on planar calibration is addressed and implemented, and the improvement of accuracy is examined via qualitative and quantitative analysis. The results show that the rangefinder offset, horizontal direction circle index and vertical circle index are the main systematic errors. The accuracy of distance is corrected from 29.94 cm to 2.86 cm with an improvement of 86.89% for the plane-based calibration, and validation indicates that this is corrected from 25.47 cm to 5.60 cm with an improvement of 88.25%.
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