利用误差熵评价光斑中点云不确定性

发布时间：2018-06-27 18:47

本文选题：信息熵 + 误差熵　；参考：《武汉大学学报(信息科学版)》2017年06期

【摘要】：三维激光扫描点位精度受光斑影响较大,激光点在光斑中呈现了不确定性,该不确定性的准确描述关系到激光点位精度的评价。将误差熵模型引入到点位不确定性的评价中,利用激光点位在光斑中不确定性的概率密度函数,推导了激光点位信息熵,并依据误差熵与信息熵的关系得到了激光点位的误差熵。通过分析误差熵与光斑面积的关系,得到点云光斑平均误差熵,实现了将平均误差熵引入到点云不确定性的评价中。通过设置不同扫描间隔得到的点云数据,分析了平均熵模型进行基于光斑影响下的点云精度评价的可行性,最终实现了对光斑中点云不确定性的准确评价。
[Abstract]:The accuracy of 3D laser scanning points is greatly affected by the spot, and the laser spot is uncertain in the spot. The accurate description of the uncertainty is related to the evaluation of the accuracy of the laser spot. In this paper, the error entropy model is introduced into the evaluation of the point position uncertainty. Using the probability density function of the laser spot uncertainty in the spot, the information entropy of the laser point position is deduced. According to the relationship between error entropy and information entropy, the error entropy of laser point is obtained. By analyzing the relationship between the error entropy and the spot area, the average error entropy of the point cloud spot is obtained, and the average error entropy is introduced into the evaluation of the point cloud uncertainty. By setting the point cloud data from different scanning intervals, the feasibility of the point cloud accuracy evaluation based on the influence of spot on the average entropy model is analyzed. Finally, the accurate evaluation of the point cloud uncertainty in the spot is realized.
【作者单位】：武汉理工大学资源与环境工程学院;武汉市测绘研究院博士后创新实践基地;东华理工大学江西省数字国土重点实验室;武汉大学测绘学院;武汉光谷北斗控股集团有限公司;
【基金】：长江科学院开放研究基金(CKWV2015230/KY) 国家自然科学基金(41501502,41674005,41304001,41464001) 东华理工大学江西省数字国土重点实验室开放研究基金(DLLJ201601) 武汉市测绘研究院博士后创新实践基地科研项目(WGF2016002) 江西省教育厅科学技术研究项目(GJJ150592)~~
【分类号】：P225.2

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