杨晓云,岑敏仪,梁郁,梁鑫

• 1:西南交通大学地球科学与环境工程学院
• 2:广西科技大学土木建筑工程学院

摘要(Abstract)：

回波比率描述了地物表面的激光点云在垂直方向分布的离散程度和穿透力,可用于分割建筑物和植被脚点。针对传统的回波比率计算方法受实体表面坡度的影响较大,通常随着地物表面倾角的增大,其计算值呈下降趋势,该文在B.Hfle自适应坡度回波比率算法基础上,通过对邻域体系分析发现3D与2D邻域的垂直方向参数尺度不一致才是造成倾斜表面回波比率减小的真实原因。采用不同的空间邻域进行回波比率计算,并在此基础上提出了改进的自适应坡度回波比率计算方法。较B.Hfle算法,改进后的方法无须计算局部表面坡度,仅调整3D邻域的垂直方向参数尺度就可适用于不同坡度倾斜屋顶表面。通过实测LiDAR点云进行试验验证,新算法的正确率和效率较原有算法都有较大的提高。

关键词(KeyWords)： 机载激光雷达;邻域体系;自适应坡度;回波比率;分割

Abstract:

Keywords:

基金项目(Foundation): 广西高等教育教学改革工程项目(2014JGA188);; 广西高校科学技术研究项目(YB2014213);; 广西科技大学科学科研项目(校科自1307103)

作者(Author): 杨晓云,岑敏仪,梁郁,梁鑫

DOI: 10.16251/j.cnki.1009-2307.2018.07.020

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