引用本文: 陈西江, 花向红, 邹进贵, 贺小星. 光斑影响下激光点云的不确定性评价[J]. 武汉大学学报 ( 信息科学版), 2015, 40(1): 107-111.
Chen Xijiang, Hua Xianghong, Zou Jingui, He Xiaoxing. Uncertainty Evaluation of Laser Points CloudUnder the Influence of Spot[J]. Geomatics and Information Science of Wuhan University, 2015, 40(1): 107-111.
 Citation: Chen Xijiang, Hua Xianghong, Zou Jingui, He Xiaoxing. Uncertainty Evaluation of Laser Points CloudUnder the Influence of Spot[J]. Geomatics and Information Science of Wuhan University, 2015, 40(1): 107-111.

## Uncertainty Evaluation of Laser Points CloudUnder the Influence of Spot

• 摘要: 利用光斑的特性确定激光点位在光斑中的不确定性,将误差熵引入到激光点位不确定性的评价中。根据激光反射特性,确定了激光点位不确定性的概率密度函数,利用信息熵的定义推导了激光点位的信息熵,同时,利用信息熵与误差熵的关系进行了激光点位误差熵的推导,根据误差熵关系式确定了误差熵与光斑面积的线性关系。根据点云光斑实际面积,得到了点云误差熵及每个激光点位的平均误差熵。利用入射角与误差熵之间的关系,分析了入射角对激光点位不确定性的影响程度,确定了扫描的最佳入射角范围。通过设置不同扫描间隔得到的点云数据,验证了利用误差熵对点云不确定性进行评价的可行性。

Abstract: This paper uses the characteristics of light spots to determine the uncertainty of laser in the spot，which introduces error entropy into the uncertainty of laser points. Uncertainty in points the laser point density function is determined based on the characteristic of lasers. Laser point information entropy is derived based on the information definition，taking advantage of the relationship between the information entropy and the error entropy to derive laser point error entropy. Error entropy is the linear relationship of spot size based on the error entropy expression. Point cloud error entropy andaverage error entropy of each point was acquired according to point cloud spot actual area. The influence of incident angle on the uncertainty of laser points was analyzed by the relationship of incident angle and error entropy，and the best incident angle of scan was determined. A feasibility of point cloud uncertainty by error entropy was verified according to the analysis of point clouds by setting different scan intervals.

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