SAR影像仿真与水下地形反演的阻尼牛顿-行作用法  

Damped Newton-Row Action Method for SAR Image Simulation and Underwater Topography Inversion

作　　者：崔经汉[1] 陈国庆[2] 张杰[3] 

机构地区：[1]内蒙古工业大学电力学院,内蒙古呼和浩特010080 [2]内蒙古大学理工学院,内蒙古呼和浩特010021 [3]国家海洋局第一海洋研究所

出　　处：《海洋科学进展》2003年第1期68-77,共10页Advances in Marine Science

基　　金：教育部优秀青年教师教学科研奖励计划和内蒙古自然科学基金项目--数学规划中的行作用法(990301-1);国家高技术研究发展计划项目--模块化水下目标与岛礁环境遥感监测技术(2001AA633050)

摘　　要：研究了浅海SAR影像仿真与水下地形反演的数值方法。将仿真与反演问题模型处理为相互独立的依赖于时间的非线性偏微分方程动力系统,使反演问题模型仅依赖于SAR影像灰度值,计算可一次性完成,计算过程中无须与正问题进行数据交互,在此基础上,提出了仿真与反演的一种新的一致性优化算法:阻尼牛顿-行作用法.数值实验结果表明,算法对SAR影像仿真问题具有高效、可靠、计算稳定的特征;对水下地形反演问题也有较强的数值稳定性和较高的计算精度。本文3个算例反演出的地形与实际地形之间的相关系数都优于0.72029.The numerical method for shallow water SAR image simulation and underwater topography inversion was studied. The simulation and inversion models are treated as two dynamic systems of nonlinear partial differential equations independent of each other so that the inversion model depends only on the grey levels of SAR image and the computation can be completed without data exchange with the simulation model, and the damped Newtonrow action method is proposed to make above simulation and inversion. It is shown from the numerical experiment results that this method is efficient and reliable for solving the simulation problem of SAR image and has high stability and computing accuracy for solving the underwater topography inversion problem. The correlation coefficients between the inversed topography and the real topography for 3 examples are all greater than 0.72029.

关 键 词：SAR影像仿真 水下地形反演 阻尼牛顿法 行作用方法 大型稀疏矩阵 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]