地面三维激光扫描点云精度影响因素分析
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摘要
地面三维激光扫描仪在实际工作中获取的点云精度受多种因素影响。为了有效控制影响因素,提高工作质量,分别从扫描距离、倾角、材质、颜色及环境因素方面进行分析研究。实验结果表明,各因素对点云精度有不同程度的影响,并呈现一定的规律性。当扫描距离增大时,准真值与扫描值的差值越来越大,点云数量逐渐减小;当倾角为90°时,准真值与扫描值的差值最小,点云数量最多;当材质的粗糙程度增大时,点云的反射率逐渐变小,点云数量逐渐增多。此外,温度、湿度、能见度对扫描精度的影响较小,在特定条件下可以忽略不计。
The accuracy of a 3 D laser scanner point cloud data is affected by many factors. This paper assesses effect of the scanning distance,angle,material,color and environmental factors. The experimental results show that different factors have different degree of influence on the precision of point clouds,and has certain regularity. The higher the scanning distance is,the larger the difference between the 'quasi true' and the scanning value is,and the number of point clouds gradually decreases. When the angle is 90 degrees,the difference between the quasi true value and the scanning value is the smallest and the number of point clouds is the largest. When the roughness of the material increases,the reflectivity of the point cloud becomes smaller and the number of point clouds gradually increases. In addition,the influence of the temperature,humidity,and visibility on scanning accuracy is small,and it can be ignored under specific conditions.
The accuracy of a 3 D laser scanner point cloud data is affected by many factors. This paper assesses effect of the scanning distance,angle,material,color and environmental factors. The experimental results show that different factors have different degree of influence on the precision of point clouds,and has certain regularity. The higher the scanning distance is,the larger the difference between the 'quasi true' and the scanning value is,and the number of point clouds gradually decreases. When the angle is 90 degrees,the difference between the quasi true value and the scanning value is the smallest and the number of point clouds is the largest. When the roughness of the material increases,the reflectivity of the point cloud becomes smaller and the number of point clouds gradually increases. In addition,the influence of the temperature,humidity,and visibility on scanning accuracy is small,and it can be ignored under specific conditions.
引文
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[2]高祥伟,孙乐,谢宏全.目标颜色和粗糙度对三维激光扫描点云精度影响研究[J].测绘通报,2013(11):84-86.
[3]朱凌.地面三维激光扫描标靶研究[J].激光杂志,2008,29(1):33-35.
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[6]蔡越,徐文兵,梁丹,等.不同因素对地面三维激光扫描点云精度的影响[J].激光与光电子学进展,2017(9):358-367.
[7]高威.地面激光点云测量精度分析与评价[D].北京:北京建筑大学,2016.
[8]苏鹰滨,宋飞凤,田世乾.影响三维激光数据采集精度的因素研究[J].计算机与数字工程,2013,41(6):1030-1033.
[9]李海泉,杨晓锋,赵彦刚.地面三维激光扫描测量精度的影响因素和控制方法[J].测绘标准化,2011(1):29-31.
[10]郑德华,沈云中,刘春.三维激光扫描仪及其测量误差影响因素分析[J].测绘工程,2005(2):32-34,56.
[11]马宁,姚吉利,贾象阳,等.三维激光扫描测量精度评定的讨论[J].测绘与空间地理信息,2015,38(11):120-122.
[2]高祥伟,孙乐,谢宏全.目标颜色和粗糙度对三维激光扫描点云精度影响研究[J].测绘通报,2013(11):84-86.
[3]朱凌.地面三维激光扫描标靶研究[J].激光杂志,2008,29(1):33-35.
[4]杨荣华,花向红,邱卫宁,等.地面三维激光扫描点云角度分辨率研究[J].武汉大学学报(信息科学版),2012,37(7):851-853.
[5]曹先革,张随甲,司海燕,等.地面三维激光扫描点云数据精度影响因素及控制措施[J].测绘工程,2014,23(12):5-7.
[6]蔡越,徐文兵,梁丹,等.不同因素对地面三维激光扫描点云精度的影响[J].激光与光电子学进展,2017(9):358-367.
[7]高威.地面激光点云测量精度分析与评价[D].北京:北京建筑大学,2016.
[8]苏鹰滨,宋飞凤,田世乾.影响三维激光数据采集精度的因素研究[J].计算机与数字工程,2013,41(6):1030-1033.
[9]李海泉,杨晓锋,赵彦刚.地面三维激光扫描测量精度的影响因素和控制方法[J].测绘标准化,2011(1):29-31.
[10]郑德华,沈云中,刘春.三维激光扫描仪及其测量误差影响因素分析[J].测绘工程,2005(2):32-34,56.
[11]马宁,姚吉利,贾象阳,等.三维激光扫描测量精度评定的讨论[J].测绘与空间地理信息,2015,38(11):120-122.