单波束控制下的声呐图像重建三维地形方法  

Reconstructing Underwater Topography from Sonar Image Under the Constraint of Single Beam Data

作　　者：刘洪博 温旭 万梦 尚晓东 沈华 谭强 LIU Hongbo;WEN Xu;WAN Meng;SHANG Xiaodong;SHEN Hua;TAN Qiang(Zhejiang Academy of Surveying and Mapping,Hangzhou 310000,China;Department of Weaponry Engineering,Naval University of Engineering,Wuhan 430033,China;Zhejiang Dinghong Survey and Design Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]浙江省测绘科学技术研究院,浙江杭州310000 [2]海军工程大学兵器工程学院,湖北武汉430033 [3]浙江鼎弘勘测设计有限公司,浙江宁波315000

出　　处：《测绘地理信息》2024年第4期63-68,共6页Journal of Geomatics

基　　金：国家自然科学基金(41606114)

摘　　要：虽然单波束和多波束声呐系统都可用于水深测量,但是在获取高分辨率水下地形方面都存在一定局限性。为解决这一问题,提出了单波束控制下利用侧扫声呐图像重建三维地形的方法,并以单波束数据为参考构建了迭代终止条件。首先,基于朗伯体反射模型构建了侧扫声呐图像重建三维地形模型;然后,以单波束测深数据为约束,构建了初始和终止条件;最后,计算实测外部水深和重建地形的差值,进行精度评估,研究了迭代过程的收敛性。实验结果表明,所提方法具有很好的收敛性,重建结果能够反映真实的水下特征,迭代终止方法具有客观性和自动性。Though single beam system and multibeam echo sounder can be used for underwater depth measurement,they both have limitations in obtaining high-resolution topography.To solve this problem,we propose a method to reconstruct underwater topography from side scan sonar image under the constraint of single beam data.Meanwhile,an iterative termination method is proposed by referring to the single beam da⁃ta.Firstly,a 3D terrain reconstruction model based on sidescan sonar image is constructed based on lambert reflection model.Then,with the constraint of single beam data,the initial and termination conditions are established.Finally,the differences between single beam data and reconstructed terrain are calculated to evaluate the accuracy.Meanwhile,the con⁃vergence of iterative process is studied.Experimental results show that the proposed method has good convergence,the reconstructed terrain can reflect real features and the iterative process is objective and automatic.

关 键 词：单波束 侧扫声呐 高分辨率 地形重建 迭代终止 

分 类 号：P229[天文地球—大地测量学与测量工程] P208[天文地球—测绘科学与技术] U666[交通运输工程—船舶及航道工程]