用于植物三维结构表型研究的移动地面近端感知系统

发布时间：2018-04-09 04:32

本文选题：植物表型研究　切入点：近端感知　出处：《激光杂志》2017年01期

【摘要】：植物表型研究在把握植物结构和了解植物对环境变化的反应上起着至关重要的作用。因此,通过引入多种遥感技术例如LIDAR,研究者一直针对不同场景开发不同的植物表型技术。目前,该领域的重要趋势是开发可供于广泛使用的低成本三维系统,而通常使用的高成本的LIDAR传感器无法满足这一需求。为了解决这个问题,试图开发一个基于低成本二维激光扫描仪的用于室内植物三维结构表型研究的移动地面近端感应系统。特别地,将两个RPLIDAR激光扫描仪(目前市场上最低成本的二维LIDAR传感器)安装在两个远端的放置于移动平台的固定架上。如此一来,它们的扫描剖面被设置成一个斜交的方式。然后,经过精确的数据三维位置坐标设定和校准后,平台的移动可以使得两个系列的二维扫描剖面转变为研究区一排植物的全部三维表征。基于三维点云结果,人们可以获得详细的植物结构特征。实验表明,提出的方案得到基本验证,对于特定的植物结构变量例如叶面积(R2=0.92)可以精确获取。总之,该工作可以推动将基于LIDAR的植物表型技术发展到真正意义上的低成本阶段,而且这表明LIDAR在植物表型研究上的实际应用会越来越多出现在植物栽培、精准农业等领域。
[Abstract]:The study of plant phenotype plays an important role in understanding plant structure and plant response to environmental change.Therefore, by introducing a variety of remote sensing techniques such as lidar, researchers have been developing different plant phenotypic techniques for different scenarios.At present, the important trend in this field is to develop low-cost 3D systems that can be widely used, but the commonly used high-cost LIDAR sensors can not meet this demand.In order to solve this problem, this paper attempts to develop a mobile ground proximal sensing system based on a low-cost two-dimensional laser scanner for the study of three-dimensional structural phenotype of indoor plants.In particular, two RPLIDAR laser scanners (the lowest available two-dimensional LIDAR sensors on the market) are installed on two remote fixed frames on the mobile platform.As a result, their scanning profiles are set to a skew.Then, after setting and calibrating the precise 3D position coordinates, the movement of the platform can transform the two series of two-dimensional scanning profiles into the full three-dimensional representation of a row of plants in the study area.Based on three-dimensional point cloud results, detailed plant structure features can be obtained.The experimental results show that the proposed scheme is basically verified and can be accurately obtained for specific plant structural variables such as leaf area R20.92).In short, this work can promote the development of plant phenotype technology based on LIDAR to the real low-cost stage, and this indicates that the actual application of LIDAR in plant phenotype research will be more and more in plant cultivation, precision agriculture and other fields.
【作者单位】：北京大学地球与空间科学学院;
【分类号】：TN209

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