三维激光扫描测量在植被参数提取中的应用

Applications of 3D laser scanning technology in the extraction of vegetation parameters

植被参数是反映植被生长信息的重要指标。运用三维激光扫描技术获取试验区植被紫穗槐长势数据,并利用点云数据进行三维模型构建,提取每株紫穗槐的株高、冠幅、冠高、体积等参数,并与人工测量方法对比。结果表明,三维激光扫描测量与人工测量的株高和冠幅相对误差较小,复相关系数均大于95%置信度,理论上该技术完全可以代替人工测量方法提取紫穗槐长势参数。受仪器本身和外界环境影响,参数提取的完整性和稳定性有待提高。研究结果可为植被(尤其是灌木植被)三维建模及无损监测提供参考,对植被数字化具有重要意义。

Vegetation parameters are important indicators reflecting vegetation growth information.Three-dimensional laser scanning technology was used to obtain data from the vegetation amorpha in the test area,and point cloud data was used to construct a three-dimensional model.And scans plants of experimental zone,then extracts plant height,crown width,crown height,volume based on the point cloud data.Comparing with the manual measurement method,the feasibility of the application of three-dimensional laser scanning measurement technology in extracting the growth parameters of amorpha fruticosa was discussed.The research results show that the error of three-dimensional laser scanning measurement technology was less than that of the artificial measurement of plant height and crown width.Complex correlation coefficient was greater than 95%is degree of confidence,3 D laser scanning technology could completely replace the manual measurement method for the extraction of the growth parameters of amorpha fruticosa in theory.However,due to the influences of the instrument itself and the external environment,the integrity and stability of parameter extraction needed to be improved.The results of this study could provide a monitoring method for the three-dimensional modeling of vegetation(especially shrub vegetation)and non-destructive vegetation monitoring,which was of great significance for plant digitization.