相控阵三维摄像声纳的自适应阈值选取

doi:10.7964/jdxbgxb201303047

吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (03): 841-848.doi: 10.7964/jdxbgxb201303047

• 论文 • 上一篇

相控阵三维摄像声纳的自适应阈值选取

袁龙涛, 田翔, 陈耀武

浙江大学生物医学工程及仪器科学学院, 杭州 310027

收稿日期:2012-02-03 出版日期:2013-05-01 发布日期:2013-05-01
通讯作者: 陈耀武(1963-),男,教授,博士生导师.研究方向:嵌入式系统,声纳信号处理,多媒体技术. E-mail:cyw@mail.bme.zju.edu.cn E-mail:cyw@mail.bme.zju.edu.cn
作者简介:袁龙涛(1985-),男,博士研究生.研究方向:水声信号处理.E-mail:lt23yuan@zju.edu.cn
基金资助:
"863"国家高技术研究发展计划项目(2010AA09Z104);中央高校基本科研业务费专项基金项目 (2011FZA5004).

Selection of adaptive threshold for phased array 3D sonar

YUAN Long-tao, TIAN Xiang, CHEN Yao-wu

School of Biomedical Engineering & Instrumentation Science, Zhejiang University, Zhejiang 310027, China

Received:2012-02-03 Online:2013-05-01 Published:2013-05-01

摘要/Abstract

摘要： 针对相控阵三维摄像声纳阈值选取的问题,提出了一种新的自适应阈值方法.该方法首先根据检测到的各个波束所属的边缘模式,统计各个波束的邻域对称性,并利用该对称性对原始的基于波束强度的置信度图像进行修正.再采用最大熵原理,计算适用于新的置信度图像的自适应阈值.试验结果表明:该算法能够有效地区分物体区域和背景区域,而所需的计算量仅与常规的空域滤波方法处于同一量级.该自适应阈值算法适合于相控阵三维摄像声纳系统的实时应用.

关键词: 声学, 相控阵三维摄像声纳, 自适应阈值, 最大熵, 波束图对称性

Abstract: An adaptive threshold method was proposed for phased array 3D sonar systems. First, the beams of were classified into several edge modes and the beam-strength based confidence image was modified by checking the neighborhood symmetry of each beam. Next, the principle of maximum entropy was introduced to search the optimal adaptive threshold for the new confidence image. Experimental results show that the proposed method can distinguish the objects and backgrounds effectively while requiring similar computation as conventional spatial filter methods. This threshold method is suitable for real-time applications in phased array 3D sonar systems.

Key words: acoustic, phased array three-dimensional sonar, adaptive threshold, maximum entropy, symmetry of beam pattern

中图分类号:

TB565

袁龙涛, 田翔, 陈耀武. 相控阵三维摄像声纳的自适应阈值选取[J]. 吉林大学学报(工学版), 2013, 43(03): 841-848.

YUAN Long-tao, TIAN Xiang, CHEN Yao-wu. Selection of adaptive threshold for phased array 3D sonar[J]. 吉林大学学报(工学版), 2013, 43(03): 841-848.

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相控阵三维摄像声纳的自适应阈值选取

Selection of adaptive threshold for phased array 3D sonar

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