Design and evaluation of a full-wave surface and bottom-detection algorithm for LiDAR bathymetry of very shallow waters
Design and evaluation of a full-wave surface and bottom-detection algorithm for LiDAR bathymetry of very shallow waters
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DOI：
10.1016/j.isprsjprs.2019.02.002
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发表时间：
2019-04
影响因子：
12.7
通讯作者：
Roland Schwarz;G. Mandlburger;M. Pfennigbauer;N. Pfeifer
中科院分区：
文献类型：
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作者：
Roland Schwarz;G. Mandlburger;M. Pfennigbauer;N. Pfeifer
摘要机载激光测深（ALB）由于可以实现高采集率和高点密度，因此是一种有吸引力的浅水水体测量技术。特别感兴趣的是ALB在非通航区域的应用，其中唯一的选择是传统的地面测量涉水与杆，多媒体摄影测量，或基于光谱的深度检索。在这种非常浅的沃茨（< 2 m）中，基于激光的方法面临的挑战是难以区分来自表面和底部的回波。这项工作提出了一种算法，用于检测表面，体积和底部（SVB）的设计，以满足这一挑战，同时只需要一个单一的波长（532 nm）的传感器。该算法的准确性进行了交叉验证，从地面测量与全站仪获得的参考测量，并显示可以忽略不计的偏差，几乎没有深度依赖的实验数据集。
Abstract Airborne Laser Bathymetry (ALB) is an attractive technology for the measurement of shallow water bodies because of the high acquisition rate and high point densities that can be achieved. Of special interest is the application of ALB in non-navigable areas where the only alternatives are conventional terrestrial surveying by wading with a pole, multi-media photogrammetry, or spectrally based depth retrieval. The challenge for laser based approaches in such very shallow waters (< 2 m) is the difficulty of discriminating between echoes from the surface and the bottom. This work presents an algorithm for the detection of surface, volume, and bottom (SVB) designed to meet this challenge while requiring only a single wavelength (532 nm) sensor. The accuracy of the algorithm is cross validated against reference measurements obtained from terrestrial survey with a total station and shows negligible bias and virtually no depth dependence for the experimental dataset.