地面激光雷达扫描垂直立面的强度数据模拟

作者:汪沛 刊名:激光与光电子学进展 上传者:白爱民

【摘要】地面激光雷达获取的激光强度数据包含目标的物理和化学信息,因此研究激光强度数据的生成机制就成为对其分析和应用的关键。分析了地面激光雷达的工作特点,提出假设简化了激光强度数据的计算方程,得出影响激光强度数据的3个主要参量:目标反射率、入射角度和扫描距离。以垂直立面为目标分析地面激光雷达扫描的空间点阵间距的非均匀分布特性,并提出衡量扫描点间距非均匀分布程度的计算方程,分析扫描角度的步进值对扫描点间距非均匀分布的影响。根据实际参数模拟垂直立面的激光强度数据,验证了强度数据计算方程并分析了各参量的影响。

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激光与光电子学进展 49,080102(2012) Laser &Optoelectronics Progress ○C2012《中国激光》杂志社地面激光雷达扫描垂直立面的强度数据模拟 汪 沛 (北京林业大学电子信息科学与技术系,北京100083) 摘要 地面激光雷达获取的激光强度数据包含目标的物理和化学信息,因此研究激光强度数据的生成机制就成为对其分析和应用的关键。分析了地面激光雷达的工作特点,提出假设简化了激光强度数据的计算方程,得出影响激光强度数据的3个主要参量:目标反射率、入射角度和扫描距离。以垂直立面为目标分析地面激光雷达扫描的空间点阵间距的非均匀分布特性,并提出衡量扫描点间距非均匀分布程度的计算方程,分析扫描角度的步进值对扫描点间距非均匀分布的影响。根据实际参数模拟垂直立面的激光强度数据,验证了强度数据计算方程并分析了各参量的影响。 关键词 遥感;地面激光雷达;激光强度;模拟 中图分类号 TN958.98   文献标识码 A   doi:10.3788/LOP49.080102 Intensity Simulation of Vertical Surface by Terrestrial Laser Scanning Wang Pei ( Department of Electronic Science and Technology , Beijing Forestry University , Beijing 100083, China ) Abstract Intensity data acquired by terrestrial laser scanner contains physical and chemical information of objects. The mechanism by which the intensity data are produced is the key point to the analysis and application of intensitydata.The working characteristics of terrestrial laser scanners are analyzed,hypotheses are proposed,and thecalculating formulation of intensity data is simplified.The conclusion is drawn that reflectivity,incidence angle andrange are the three main variables affecting the intensity data mostly.Based on a vertical surface,the distancesbetween adjoined scanning points and influence of angular step width are analyzed and a formulation is proposed to measure a nonuniform distribution of scanning point.By simulating the intensity data of the vertical surfaces,the proposed formulation about intensity data is verified and the in

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