一种提高可见光遥感图像黑极性舰船目标检出率的方法  

A Method for Improving the Detection Rate of Black Polar Ship Targets in Visible Remote Sensing Images

作　　者：刘林峰 胡清平 马丽衡 张晓晖[1] LIU Lin-feng;HU Qing-ping;MA Li-heng;ZHANG Xiao-hui(School of Ordnance Engineering,Naval University of Engineering,Wuhan 430000,China)

机构地区：[1]海军工程大学兵器工程学院,湖北武汉430000

出　　处：《光学与光电技术》2023年第4期59-66,共8页Optics & Optoelectronic Technology

摘　　要：针对遥感卫星和高空无人机在海上航拍的可见光遥感图像中黑极性舰船目标检出率低的问题,提出了一种基于暗原色先验和恒虚警率原理的舰船目标检测方法。这种方法先对目标图像进行预处理,得到其暗原色图(Dark Channel Image,DCI);再将DCI作为二维恒虚警(2-D CFAR)检测法的输入,以局部统计灰度均值和方差作为目标检测特征,通过选择合适的目标判定阈值及目标空间分布信息完成疑似目标定位;疑似目标集合可以有效地被舰船目标特征矢量进行检验,根据得到的结果判定虚警是否去除,最后得到最终目标检测结果。实验结果表明,该方法对于可见光遥感图像中的舰船目标有较为准确的检测效果,总检出率可达96.07%,并且对人眼视觉不易判别的黑极性目标有着类似“放大镜”的作用,对黑极性舰船目标的检出率可达86.71%,较大地提高了可见光遥感图像中黑极性舰船目标的检出率,对优化黑极性目标检测方法创新有一定的指导意义,也为暗原色先验原理的应用提供了新思路。Aiming at the low detection rate of black polar ship targets(BPST)in visible remote sensing images(VRSI)taken by remote sensing satellites and high-altitude UAV at sea,a ship target detection method based on dark primary color prior and constant false-alarm rate principle is proposed in this paper.In this method,the target image is preprocessed to obtain its dark channel image(DCI).The DCI is used as the input of 2-D-CFAR detection method,and the local statistical gray mean and variance are used as target detection characteristics.The suspected targets'locations are completed by selecting appropriate target determination threshold and target spatial distribution information.Finally,the suspected targets'sets are verified by using the established ship target feature vector to remove false alarms and output the final target detection results.Experimental results show that this method has a more accurate detection effect on ship targets in VRSI,with a total detection rate of 96.07%.It also acts as a"magnifying glass"for BPST which are difficult to be distinguished by human visual,with a detection rate of 86.71%.It greatly improves the detection rate of BPST in VRSI,which has certain guiding significance to optimize the innovation of black polar target detection method,and also provides a new idea for the application of dark channel prior principle.

关 键 词：可见光遥感图像 暗通道 恒虚警 黑极性舰船目标检测 目标特征矢量 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]