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
刘洪博 1温旭 1万梦 1尚晓东 2沈华 3谭强1
作者信息
- 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
- 折叠
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.
Abstract
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 termi-nation method is proposed by referring to the single beam da-ta. Firstly,a 3D terrain reconstruction model based on side-scan sonar image is constructed based on lambert reflection model. Then,with the constraint of single beam data,the ini-tial 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 resultsshow that the proposed method has good convergence,the re-constructed 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Key words
single beam/side scan sonar/high-resolution/terrain reconstruction/iteration termination引用本文复制引用
出版年
2024
NETL
NSTL
万方数据