为探究精细化机载点云数据在大比例尺地形图测绘中的应用效益,提高基于机载点云数据绘制数字地形图的精度,选取了建模难度较大的带状地形作为测区,并获取了点云模型。使用Li DAR 360软件对点云数据进行精细化预处理,提高了点云模型的地...为探究精细化机载点云数据在大比例尺地形图测绘中的应用效益,提高基于机载点云数据绘制数字地形图的精度,选取了建模难度较大的带状地形作为测区,并获取了点云模型。使用Li DAR 360软件对点云数据进行精细化预处理,提高了点云模型的地面拟合度。结合点云模型与三维实景模型绘制1∶500的大比例尺地形图,并根据GPS-RTK获取的100个校核点对地形图精度进行了分析。研究结果表明:采用模型质量和测绘专项需求精细化处理方法可提高点云模型的地面拟合度,且绘制的地形图满足1∶500大比例尺地形图的绘制要求。展开更多
The simplification of 3D laser scanning point cloud is an important step of surface reconstruction and volume estimation of bulk grain in granary.This study presented an adaptive simplification algorithm based on part...The simplification of 3D laser scanning point cloud is an important step of surface reconstruction and volume estimation of bulk grain in granary.This study presented an adaptive simplification algorithm based on particle swarm optimization(PSO).It introduced PSO into the average distance method,a conventional simplification method.The basic idea of this algorithm was to adaptively determine the optimal point reducing intervals of scanning lines according to original point cloud density by PSO.By using the 3D point cloud scanned from bulk grain surface in granary,the proposed algorithm was validated.Compared with the average distance method,the proposed algorithm obtained more evenly distributed point set,smaller reduction ratio(6.96%)and higher volume estimation accuracy(relative error was less than 3‰).The 3D laser scanner(GSLS003,Jilin University and SkyViTech Co.,Ltd.,Hangzhou,China)used in this study could scan the complete picture of the grain surface in a granary in one time,so the acquired point cloud data do not have to be jointed.For the good simplification performance and capability of updating the reducing interval at any moment,the proposed algorithm and the 3D laser scanner could be used to realize online real-time measurement of stored bulk grain volume in granary.展开更多
文摘为探究精细化机载点云数据在大比例尺地形图测绘中的应用效益,提高基于机载点云数据绘制数字地形图的精度,选取了建模难度较大的带状地形作为测区,并获取了点云模型。使用Li DAR 360软件对点云数据进行精细化预处理,提高了点云模型的地面拟合度。结合点云模型与三维实景模型绘制1∶500的大比例尺地形图,并根据GPS-RTK获取的100个校核点对地形图精度进行了分析。研究结果表明:采用模型质量和测绘专项需求精细化处理方法可提高点云模型的地面拟合度,且绘制的地形图满足1∶500大比例尺地形图的绘制要求。
基金This work was financially supported by National Natural Science Foundation of China(No.50975121)Jilin Province Science and Technology Development Plan Item(No.20130522150JH)2013 Jilin Province Science Foundation for Post Doctorate Research(No.RB201361).
文摘The simplification of 3D laser scanning point cloud is an important step of surface reconstruction and volume estimation of bulk grain in granary.This study presented an adaptive simplification algorithm based on particle swarm optimization(PSO).It introduced PSO into the average distance method,a conventional simplification method.The basic idea of this algorithm was to adaptively determine the optimal point reducing intervals of scanning lines according to original point cloud density by PSO.By using the 3D point cloud scanned from bulk grain surface in granary,the proposed algorithm was validated.Compared with the average distance method,the proposed algorithm obtained more evenly distributed point set,smaller reduction ratio(6.96%)and higher volume estimation accuracy(relative error was less than 3‰).The 3D laser scanner(GSLS003,Jilin University and SkyViTech Co.,Ltd.,Hangzhou,China)used in this study could scan the complete picture of the grain surface in a granary in one time,so the acquired point cloud data do not have to be jointed.For the good simplification performance and capability of updating the reducing interval at any moment,the proposed algorithm and the 3D laser scanner could be used to realize online real-time measurement of stored bulk grain volume in granary.