海底底质分类反向散射强度三维概率密度法

摘要

反向散射强度随入射角变化信息蕴含海底底质特性, 是多波束海底底质分类的重要数据源.目前, 多波束海底底质分类主要提取平均反向散射强度随入射角的变化信息或基于声呐图像, 没有综合考虑两者的相关信息.本文综合考虑平均反向散射强度随入射角变化信息及其概率密度分布, 绘制三维概率密度图, 提出了基于反向散射强度三维概率密度图的海底底质分类方法.实例计算结果表明:该方法能直观表达多波束条带覆盖区内不同海底底质类型的数量, 有效判断不同海底底质类型的边界, 实现海底底质类型的快速识别.%Backscatter strength angular response embodies the seafloor substrates classification, which are the important data sources for multibeam seafloor classification.At present, multibeam seafloor classification mainly extract mean backscatter strength angular response or sonar image without considering the relevant information of two aspects.This paper comprehensively analyzes backscatter strength angular response and probability distribution of backscatter strength, portraits 3D histogram, and proposes ways of seafloor classification based on 3D histogram of backscatter strength.Results show that the method can directly express different numbers of seafloor classification within multibeam swath, effectively judge the boundaries and realize the fast identification of different seafloor substrates.