顾及入射角的全波形激光雷达数据校正方法

发布时间：2018-06-27 21:05

本文选题：全波形激光雷达 + 波形数据　；参考：《遥感技术与应用》2014年04期

【摘要】：相比于传统激光雷达,全波形激光雷达以非常小的采样间隔记录激光回波的全部信息并以数字化存储,经过处理可以得到能够反映地物固有特性的潜在特征。在全波形激光雷达回波数据处理中,对波形数据的校正是波形分解和地物目标特征提取的关键步骤。针对激光雷达系统获取数据过程中同类型建筑物目标对不同入射方向激光反射的差异,提出了一种全波形激光雷达数据的后向散射截面校正方法,建立了顾及入射角的波形数据校正模型。采用机载小光斑全波形激光雷达数据对提出的校正方法进行验证,结果表明:该校正方法能够对同类型建筑物目标的波形数据的后向散射截面进行归一化校正,消除不同入射角对该类目标后向散射截面的影响,极大提高后续建筑物目标精细分类和特征提取等应用的精度。
[Abstract]:Compared with conventional lidar, full waveform laser radar records all the information of laser echo at very small sampling intervals and stores it digitally. After processing, the potential characteristics can be obtained which can reflect the inherent characteristics of ground objects. In the echo data processing of full waveform lidar, the correction of waveform data is the key step of waveform decomposition and feature extraction of ground objects. In view of the difference of laser reflection of the same type of building target to different incident direction in the process of obtaining data from lidar system, a correction method of backscattering cross section of full waveform laser radar data is proposed. A waveform data correction model with incident angle is established. The proposed correction method is verified by using airborne small spot full waveform lidar data. The results show that the proposed method can normalize the backscattering cross section of the waveform data of the same type of building targets. The influence of different incident angles on the backscattering cross section of this kind of target is eliminated, and the precision of fine classification and feature extraction of subsequent building targets is greatly improved.
【作者单位】：中国科学院光电研究院定量遥感信息技术重点实验室;中国科学院大学;
【基金】：国家重大专项项目“激光雷达数据处理技术” 中国科学院光电研究院创新项目“面向精细分类需求的全波形激光雷达数据处理与应用技术研究” 中国科学院光电研究院雏鹰计划“面向隐蔽目标点提取的全波形激光雷达数据处理”
【分类号】：TN958.98

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