Infrared and Laser Engineering, Volume. 54, Issue 6, 20240589(2025)
Strip adjustment for airborne LiDAR bathymetry without control points combining rigid transformation and nonlinear correction
Figures & Tables(13)
Fig. 1. Overlap region extraction based on eight neighborhoods. (a) Spatial downsampling; (b) Schematic diagram of the eight-neighborhood algorithm; (c) Extraction of boundary results; (d) Overlapping area extraction
Fig. 3. Schematic diagram of the determination of cross control points
Fig. 4. Flow chart of airborne LiDAR bathymetric strip adjustment under uncontrolled conditions
Fig. 5. Data overview. (a) Relative distribution of data; (b) Single-beam job sites; (c) ALB job site
Fig. 7. The cross-sectional effect of the data before and after the airstrip adjustment. (a) Profile
Fig. 8. The measured elevation deviation from the RTK point before and after the strip adjustment
Fig. 9. Bathymetric deviation from SBES points before and after the strip adjustment
Table 1. Mapper 20 KU airborne LiDAR bathymetry system main technical parameters
View tableView in ArticleTable 1. Mapper 20 KU airborne LiDAR bathymetry system main technical parameters
Parameter Value Scanning frequency/kHz 20 Bathymetric accuracy/m Better than 0.3 Field of view/mrad 40 Light spot/cm 5 @50 m Weight/kg 6.5
Table 2. Statistics of coincidence accuracy between flight strip before and after the strip adjustment
View tableView in ArticleTable 2. Statistics of coincidence accuracy between flight strip before and after the strip adjustment
Data Evaluation indicator $ S_{12}^{} $ $ S_{23}^{} $ $ S_{34}^{} $ $ S_{45}^{} $ Mean Before adjustment MAE/m 0.092 0.075 0.092 0.099 0.090 RMSE/m 0.139 0.106 0.126 0.139 0.128 After adjustment MAE/m 0.072 0.058 0.073 0.075 0.068 RMSE/m 0.099 0.077 0.105 0.111 0.098
Table 3. Coincidence accuracy statistics of the airstrip adjustment
View tableView in ArticleTable 3. Coincidence accuracy statistics of the airstrip adjustment
Land Underwater Max/ m Min/ m Mean/ m MAE/ m RMSE/ m Max/ m Min/ m Mean/ m MAE/ m RMSE/ m Raw data 0.414 0.010 0.179 0.175 0.187 0.767 0.009 0.229 0.23 0.315 After the adjustment by LiDAR360 0.419 0.042 0.178 0.186 0.197 0.711 0.005 0.228 0.22 0.299 After the constraint of control points 0.167 0.001 0.073 0.071 0.086 0.583 0.006 0.176 0.178 0.223 The proposed method 0.25 0.001 0.062 0.081 0.097 0.627 0.008 0.098 0.166 0.24
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Xingguo GAO, Doudou YAN, Zengliang CHANG, Chaoshuai YOU, Haojie LAI, Anxiu YANG, Dianpeng SU, Fanlin YANG. Strip adjustment for airborne LiDAR bathymetry without control points combining rigid transformation and nonlinear correction[J]. Infrared and Laser Engineering, 2025, 54(6): 20240589
Paper Information
Category: Laser
Received: Dec. 19, 2024
Accepted: Apr. 16, 2025
Published Online: Jul. 1, 2025
The Author Email: Anxiu YANG (skyanganxiu@163.com)
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