An Improved Quadrilateral Fitting Algorithm for the Water Column Contribution in Airborne Bathymetric Lidar Waveforms.
An Improved Quadrilateral Fitting Algorithm for the Water Column Contribution in Airborne Bathymetric Lidar Waveforms.
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DOI：
10.3390/s18020552
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发表时间：
2018-02-11
期刊：
影响因子：
--
通讯作者：
Liao J
中科院分区：
文献类型：
--
作者：
Ding K;Li Q;Zhu J;Wang C;Guan M;Chen Z;Yang C;Cui Y;Liao J
提出了一种基于高斯和四边形混合函数的机载激光雷达测深波形处理方法。在所提出的方法中，激光雷达波形拟合到三个函数的组合：一个高斯函数的水面贡献，另一个高斯函数的水底贡献，和一个新的四边形函数来拟合水柱的贡献。在模拟数据集和真实的数据集上对该方法进行了测试，重点是反演底部响应和水深的性能。我们还研究了参数设置对水深估计准确性的影响。结果表明，改进的四边形拟合算法在水深和震级反演中表现出较好的上级性能，具有较低的均方根误差和较高的检测率。此外，与三角函数或现有的四边形函数拟合水柱贡献相比，该方法提取的噪声和未知波形数量最少，拟合效果最好，且对不同水深具有一致的拟合优度。
In this paper, an improved method based on a mixture of Gaussian and quadrilateral functions is presented to process airborne bathymetric LiDAR waveforms. In the presented method, the LiDAR waveform is fitted to a combination of three functions: one Gaussian function for the water surface contribution, another Gaussian function for the water bottom contribution, and a new quadrilateral function to fit the water column contribution. The proposed method was tested on a simulated dataset and a real dataset, with the focus being mainly on the performance of retrieving bottom response and water depths. We also investigated the influence of the parameter settings on the accuracy of the bathymetry estimates. The results demonstrate that the improved quadrilateral fitting algorithm shows a superior performance in terms of low RMSE and a high detection rate in the water depth and magnitude retrieval. What’s more, compared with the use of a triangular function or the existing quadrilateral function to fit the water column contribution, the presented method retrieved the least noise and the least number of unidentified waveforms, showed the best performance in fitting the return waveforms, and had consistent fitting goodness for all different water depths.
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影响因子：
10.6
作者：
Figueiredo, MAT;Nowak, RD
通讯作者：
Nowak, RD
DOI：
10.1016/j.isprsjprs.2006.09.001
发表时间：
2006-11-01
影响因子：
12.7
作者：
Jutzi, Boris;Stilla, Uwe
通讯作者：
Stilla, Uwe
DOI：
10.1111/j.1467-9868.2004.02056.x
发表时间：
2004-01-01
影响因子：
5.8
作者：
Johnstone, IM;Kerkyacharian, G;Raimondo, M
通讯作者：
Raimondo, M
DOI：
10.1137/0111030
发表时间：
1963-01-01
期刊：
JOURNAL OF THE SOCIETY FOR INDUSTRIAL AND APPLIED MATHEMATICS
影响因子：
--
作者：
MARQUARDT, DW
通讯作者：
MARQUARDT, DW
影响因子：
4.8
作者：
Bouhdaoui, Anis;Bailly, Jean-Stephane;Abady, Lydia
通讯作者：
Abady, Lydia