梁旭姣1,2, 程永强1，周 超2，孙传恒2
(1 太原理工大学信息工程学院，山西 太原 ，030024；
2 国家农业信息化工程技术研究中心，农业部农业信息技术重点实验室，北京，100097)

摘要：为证实灰度信息在声呐图像中的重要价值，并获得有利于声呐图像目标分割的最佳增益值，研究了不同声呐增益值下，鲟鱼声呐图像灰度分布的形态差异，并基于灰度直方图分布信息的最大熵阈值分割算法对俄罗斯鲟（Acipenser gueldenstaedti Brandt )目标进行了分割，根据分割结果得到了最佳声呐增益值，即Gain=15dB。充分说明了在较优的声呐增益值下获取的声呐图像，即使目标形状发生严重变形时，利用其灰度直方图分布信息也能进行很好的目标分割，从而为解决鲟鱼声呐图像目标识别以及跟踪提供参考依据。

关键词：鲟鱼；声呐图像；声呐增益；灰度分布；目标分割
 

Research on gray level distribution information in the sturgeon acoustic image
LIANG Xujiao1,2, CHENG Yongqiang1，ZHOU Chao2，SUN Chuanheng2
(1 The College of Information Engineering ,Taiyuan University of Technology,Taiyuan 030024，China;
2 National Engineering Research Center for Information Technology in Agriculture，
Key Laboratory of Information Technology in Agriculture , Ministry of Agriculture, Beijing 100097,China)

Abstract：In this paper,to prove that the gray level is the important information of the acoustic image,and obtain the best Gain value which is useful to partition the fish target,r the effect of different gain values on gray level distribution of the acoustic images of Russian sturgeon（Acipenser gueldenstaedti Brandt ) was studied, and the fish target was partitioned based on the gray level histogram distribution. The result showed that the best Gain value is 15dB, under this Gain level, the fish target can be partitioned nicely from the acoustic image even when there is a serious target deformation. The work will provide useful information for sturgeon sonar image recognition and track.

Key words: Sturgeon;acoustic image; Gain value of sonar; gray level histogram distribution;object segmentation
 

（来源：《渔业现代化》2014,41(6):8-13）