Novel method for extraction of ship target with overlaps in SAR image via EM algorithm  

作　　者：CAO Rui WANG Yong 

机构地区：[1]School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Systems Engineering and Electronics》2024年第4期874-887,共14页系统工程与电子技术（英文版）

基　　金：This work was supported by the National Science Fund for Distinguished Young Scholars(62325104).

摘　　要：The quality of synthetic aperture radar(SAR)image degrades in the case of multiple imaging projection planes(IPPs)and multiple overlapping ship targets,and then the performance of target classification and recognition can be influenced.For addressing this issue,a method for extracting ship targets with overlaps via the expectation maximization(EM)algorithm is pro-posed.First,the scatterers of ship targets are obtained via the target detection technique.Then,the EM algorithm is applied to extract the scatterers of a single ship target with a single IPP.Afterwards,a novel image amplitude estimation approach is pro-posed,with which the radar image of a single target with a sin-gle IPP can be generated.The proposed method can accom-plish IPP selection and targets separation in the image domain,which can improve the image quality and reserve the target information most possibly.Results of simulated and real mea-sured data demonstrate the effectiveness of the proposed method.

关 键 词：expectation maximization(EM)algorithm image processing imaging projection plane(IPP) overlapping ship tar-get synthetic aperture radar(SAR) 

分 类 号：TN957.52[电子电信—信号与信息处理] U675.74[电子电信—信息与通信工程] E91[交通运输工程—船舶及航道工程]