基于分段多项式模型的地面三维激光扫描激光强度改正

发布时间：2018-06-29 00:09

本文选题：遥感 + 地面三维激光扫描　；参考：《激光与光电子学进展》2017年11期

【摘要】：受扫描仪到扫描物体的激光测距值、激光入射角、大气衰减等因素的影响,相同目标的激光强度存在较大偏差。从激光雷达测距方程出发,分别对激光强度的距离效应和角度效应进行改正。激光强度与激光入射角的余弦大致呈线性关系,但激光强度的距离效应较为复杂,激光强度总体上不与距离的平方呈反比,因此提出了一种利用分段多项式模型来消除激光强度距离效应的方法。实验表明,提出的改正模型能对点云激光强度进行有效补偿,通过将激光强度分别进行角度改正和距离改正,能够有效消除由距离和入射角引起的强度偏差,使同类物体的激光强度趋于一致。
[Abstract]:Under the influence of the laser ranging value from scanner to scanning object, laser incidence angle, atmospheric attenuation and other factors, the laser intensity of the same target has a large deviation. The range effect and angle effect of laser intensity are corrected from the range equation of laser radar. The laser intensity has a linear relationship with the cosine of the laser incidence angle, but the distance effect of the laser intensity is more complex, and the laser intensity is not inversely proportional to the square of the distance, as a whole, the laser intensity is not inversely proportional to the square of the distance. Therefore, a piecewise polynomial model is proposed to eliminate the laser intensity range effect. The experimental results show that the proposed correction model can effectively compensate the laser intensity of point cloud, and the deviation caused by distance and incident angle can be effectively eliminated by correcting the laser intensity by angle correction and distance correction, respectively. The laser intensity of the same kind of object tends to be consistent.
【作者单位】：江西理工大学建筑与测绘工程学院;同济大学测绘与地理信息学院;浙江农林大学省部共建亚热带森林培育国家重点实验室;
【基金】：江西理工大学博士启动基金(jxxjbs3401223283) 浙江省公益技术研究项目(LGN18C160004)
【分类号】：P225.2

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