Shallow water bathymetry based on a back propagation neural network and ensemble learning using multispectral satellite imagery  

作　　者：Sensen Chu Liang Cheng Jian Cheng Xuedong Zhang Jie Zhang Jiabing Chen Jinming Liu 

机构地区：[1]Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Nanjing University,Nanjing 210023,China [2]Collaborative Innovation Center of South China Sea Studies,Nanjing University,Nanjing 210093,China [3]School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China [4]Jiangsu Center for Collaborative Innovation in Novel Software Technology and Industrialization,Nanjing 210023,China [5]Zhejiang Institute of Hydraulics and Estuary,Hangzhou 310020,China [6]Institute of Defense Engineering,Academy of Military Sciences,Beijing 100036,China

出　　处：《Acta Oceanologica Sinica》2023年第5期154-165,共12页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract No.42001401;the China Postdoctoral Science Foundation under contract No.2020M671431;the Fundamental Research Funds for the Central Universities under contract No.0209-14380096;the Guangxi Innovative Development Grand Grant under contract No.2018AA13005.

摘　　要：The back propagation(BP)neural network method is widely used in bathymetry based on multispectral satellite imagery.However,the classical BP neural network method faces a potential problem because it easily falls into a local minimum,leading to model training failure.This study confirmed that the local minimum problem of the BP neural network method exists in the bathymetry field and cannot be ignored.Furthermore,to solve the local minimum problem of the BP neural network method,a bathymetry method based on a BP neural network and ensemble learning(BPEL)is proposed.First,the remote sensing imagery and training sample were used as input datasets,and the BP method was used as the base learner to produce multiple water depth inversion results.Then,a new ensemble strategy,namely the minimum outlying degree method,was proposed and used to integrate the water depth inversion results.Finally,an ensemble bathymetric map was acquired.Anda Reef,northeastern Jiuzhang Atoll,and Pingtan coastal zone were selected as test cases to validate the proposed method.Compared with the BP neural network method,the root-mean-square error and the average relative error of the BPEL method can reduce by 0.65–2.84 m and 16%–46%in the three test cases at most.The results showed that the proposed BPEL method could solve the local minimum problem of the BP neural network method and obtain highly robust and accurate bathymetric maps.

关 键 词：BATHYMETRY back propagation neural network ensemble learning local minimum problem multispectral satellite imagery 

分 类 号：P714.1[天文地球—海洋科学]