Comparative analysis of airborne laser bathymetric waveforms denoising algorithms

doi:10.11947/j.AGCS.2021.20200094

Abstract

Abstract: Denoising fitting of airborne laser bathymetry data is a key step in extracting the bottom terrain. The algorithm effects of wavelet adaptive threshold denoising, empirical model denoising (EMD) and joint denoising are compared in this paper, and then multivariate Gaussian fitting is used to test the denoising effect. The optimal denoising algorithm and parameter selection are obtained by comparison, and it is realized that the high-precision extraction of seabed features. This study has shown that: when the sounding data is denoised by wavelet threshold, the fixed threshold wavelet denoising effect is superior to other denoising effects, and the denoising decomposition level is more than 6 layers, which tends to be stable. The average accuracy of the algorithm reaches 8.218 2 after the fifth-order Gaussian fitting of the denoising data. The algorithm has strong robustness, it can meet the technical requirements of blue-green laser practical application, and provides a reference for accurately extracting seafloor feature information.

Key words: airborne laser bathymetry, wavelet adaptive threshold denoising, empirical model denoising, multiple Gaussian function fitting

CLC Number:

P229

SONG Yue, LI Houpu, ZHAI Guojun. Comparative analysis of airborne laser bathymetric waveforms denoising algorithms[J]. Acta Geodaetica et Cartographica Sinica, 2021, 50(2): 270-278.

References

[1] BALTSAVIAS E P. Airborne laser scanning:existing systems and firms and other resources[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 1999, 54(2-3):164-198.
[2] GLENNIE C L, CARTER W E, SHRESTHA R L, et al. Geodetic imaging with airborne LiDAR:the earth's surface revealed[J]. Reports on Progress in Physics, 2013, 76(8):086801.
[3] 王越. 机载激光浅海测深技术的现状和发展[J]. 测绘地理信息, 2014, 39(3):38-42, 67. WANG Yue. Current status and development of airborne laser bathymetry technology[J]. Journal of Geomatics, 2014, 39(3):38-42, 67.
[4] 刘焱雄, 郭锴, 何秀凤, 等. 机载激光测深技术及其研究进展[J]. 武汉大学学报(信息科学版), 2017, 42(9):1185-1194. LIU Yanxiong, GUO Kai, HE Xiufeng, et al. Research progress of airborne laser bathymetry technology[J]. Geomatics and Information Science of Wuhan University, 2017, 42(9):1185-1194.
[5] 李凯, 张永生, 童晓冲, 等. 定角圆锥扫描式机载激光测深系统定位模型与精度评价[J]. 测绘学报, 2016, 45(4):425-433. DOI:10.11947/j.AGCS.2016.20150161. LI Kai, ZHANG Yongsheng, TONG Xiaochong, et al. Positioning model and accuracy evaluation of conical scanning airborne laser bathymetry system[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(4):425-433. DOI:10.11947/j.AGCS.2016.20150161.
[6] 申二华, 张永生, 李凯. 圆扫描式机载激光测深系统检校模型及仿真分析[J]. 测绘学报, 2016, 45(8):943-951. DOI:10.11947/j.AGCS.2016.20150532. SHEN Erhua, ZHANG Yongsheng, LI Kai. The calibration model and simulation analysis of circular scanning airborne laser bathymetry system[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(8):943-951. DOI:10.11947/j.AGCS.2016.20150532.
[7] 丁凯, 李清泉, 朱家松, 等. 运用MODIS遥感数据评测南海北部区域机载激光雷达测深系统参数[J]. 测绘学报, 2018, 47(2):180-187. DOI:10.11947/j.AGCS.2018.20170536. DING Kai, LI Qingquan, ZHU Jiasong, et al. Evaluation of airborne LiDAR bathymetric parameters on the Northern South China sea based on MODIS data[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(2):180-187. DOI:10.11947/j.AGCS.2018.20170536.
[8] KUMPUMÄKI T, RUUSUVUORI P, KANGASNIEMI V, et al. Data-driven approach to benthic cover type classification using bathymetric LiDAR waveform analysis[J]. Remote Sensing, 2015, 7(10):13390-13409.
[9] WANG Chisheng, LI Qingquan, LIU Yanxiong, et al. A comparison of waveform processing algorithms for single-wavelength LiDAR bathymetry[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2015, 101(2):22-35.
[10] 姚春华, 陈卫标, 臧华国, 等. 机载激光测深系统的最小可探测深度研究[J]. 光学学报, 2004, 24(10):1406-1410. YAO Chunhua, CHEN Weibiao, ZANG Huaguo, et al. Study of the capability of minimum depth using an airborne laser bathymetry[J]. Acta Optica Sinica, 2004, 24(10):1406-1410.
[11] DE DOMINICIS L, DE COLLIBUS M F, FORNETTI G, et al. Improving underwater imaging in an amplitude-modulated laser system with radio frequency control technique[J]. Journal of the European Optical Society-Rapid Publications, 2010, 5:10004.
[12] BILLARD B, WILSEN P J. Sea surface and depth detection in the WRELADS airborne depth sounder[J]. Applied Optics, 1986, 25(13):2059-2066.
[13] GUENTHER G C, BROOKS M W, LAROCQUE P E. New capabilities of the "SHOALS" airborne LiDAR bathymeter[J]. Remote Sensing of Environment, 2000, 73(2):247-255.
[14] 亓超, 宿殿鹏, 王贤昆, 等. 基于分层异构模型的机载激光测深波形拟合算法[J]. 红外与激光工程, 2019, 48(2):114-121. QI Chao, SU Dianpeng, WANG Xiankun, et al. Fitting algorithm for airborne laser bathymetric waveforms based on layered heterogeneous model[J]. Infrared and Laser Engineering, 2019, 48(2):114-121.
[15] 王丹菂, 徐青, 邢帅, 等. 一种由粗到精的机载激光测深信号检测方法[J]. 测绘学报, 2018, 47(8):1148-1159. DOI:10.11947/j.AGCS.2018.20170466. WANG Dandi, XU Qing, XING Shuai, et al. A coarse-to-fine signal detection method for airborne LiDAR bathymetry[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(8):1148-1159. DOI:10.11947/j.AGCS.2018.20170466.
[16] 刘超, 王坚, 许长辉, 等. 基于经验模态分解的GPS/伪卫星组合基线解算模型[J]. 武汉大学学报(信息科学版), 2010, 35(8):996-1000. LIU Chao, WANG Jian, XU Changhui, et al. Integration of GPS/Pseudolites baseline solution based on empirical mode decomposition[J]. Geomatics and Information Science of Wuhan University, 2010, 35(8):996-1000.
[17] 孙磊, 张志利, 谭立龙, 等. 采用小波阈值的时变光栅莫尔信号去噪方法[J]. 红外与激光工程, 2010, 39(3):576-580. SUN Lei, ZHANG Zhili, TAN Lilong, et al. Denoising method of dynamic grating Moiré signal based on wavelet threshold[J]. Infrared and Laser Engineering, 2010, 39(3):576-580.
[18] 王丹菂, 徐青, 邢帅, 等. 机载激光测深去卷积信号提取方法的比较[J]. 测绘学报, 2018, 47(2):161-169. DOI:10.11947/j.AGCS.2018.20170501. WANG Dandi, XU Qing, XING Shuai, et al. Comparison of signal extraction method for airborne LiDAR bathymetry based on deconvolution[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(2):161-169. DOI:10.11947/j.AGCS.2018.20170501.
[19] MALLET C, BRETAR F. Full-waveform topographic LiDAR:state-of-the-art[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2009, 64(1):1-16.
[20] 丁凯. 单波段机载测深激光雷达全波形数据处理算法及应用研究[D].深圳:深圳大学, 2018. DING Kai. Research on the single-wavelength airborme LiDAR bathymetry full-waveform data processing algorithm and its application[D].Shenzhen:Shenzhen University, 2018.
[21] RONCAT A, BERGAUER G, PFEIFER N. B-spline deconvolution for differential target cross-section determination in full-wavefrm laser scanning data[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2011, 66(4):418-428.
[22] WAGNER W, ULLRICH A, DUCIC V, et al. Gaussian decomposition and calibration of a novel small-footprint full-waveform digitising airborne laser scanner[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2006, 60(2):100-112.
[23] WANG C K, PHILPOT W D. Using airborne bathymetric LiDAR to detect bottom type variation in shallow waters[J]. Remote Sensing of Environment, 2007, 106(1):123-135.
[24] ABDALLAH H, BAGHDADI N, BAILLY J S, et al. Wa-LiD:a new LiDAR simulator for waters[J]. IEEE Geoscience and Remote Sensing Letters, 2012, 9(4):744-748.
[25] UNSER M, ALDROUBI A. Polynomial splines and wavelets:a signal processing perspective[M]//CHUI C K. Wavelets:A Tutorial in Theory and Applications. New York:Academic Press, 1992:91-122.