基于有效散射单元模型的全波形LiDAR数据可变分量分解

Effective scattering cell model with variable components for full waveform LiDAR data decomposition

当前全波形LiDAR数据的分解方法仅考虑波形拟合,不能充分反映地物目标的散射特性。针对这一问题,提出利用有效散射单元表达全波形LiDAR数据,并对全波形LiDAR数据进行基于有效散射单元模型的可变分量波形分解。对ICESatGLAS全波形数据进行实验,实验结果能得到较为准确的地物高程信息;同时结果所得的有效散射单元个数与对应地物散射面积相结合,可反演各类地物散射特性。方法在自动确定地物个数的同时,从全波形LiDAR数据形成机理上设计分解模型,为全波形LiDAR数据分解建模提供了有效的新思路。

In full waveform LiDAR data decomposition,the current methods can only satisfy the waveform fitting,but can not reflect the scattering characteristic of the target feature. To this end,the full waveform LiDAR data is converted to the effective scattering cell,and the approach with unknown number of components based on effective scattering cell is presented. To test the proposal approach,the decomposition is carried out on the CESat-GLAS data. The testing results show that the proposed approach can show the evaluations of the targets,furthermore it can reflect the scattering characteristics with the scattering area of the targets. This approach can not only determine the number of components,but also design the decomposition model from the data mechanism,which provides a new idea for full waveform LiDAR data decomposition.