摘要
高分辨率SAR图像中蕴含目标与环境丰富的信息,但复杂的电磁散射机制使其难以直观解译,这一直是SAR图像解译的重要研究课题。该文简单梳理了典型几何基元的高频散射建模方法,以面散射、线散射和点散射为线索简要回顾了若干高频散射机制的研究发展过程,并给出几种典型几何基元的散射机制表达式及部分仿真结果,分析了典型散射机制表征面临的难点及应用于SAR图像解译的关键科学问题,提出从几何基元出发,发展对应的散射基元,通过散射基元进行组合和相互作用以树状方式实现更完备和广泛的散射特征表征体系,最后讨论了面向SAR图像散射信息解译来构建散射机制字典的可行性。
High-resolution SAR images contain rich information about targets and their surroundings,but the complex electromagnetic scattering mechanism makes intuitive interpretation difficult,leading to an important research topic in SAR image interpretation.This paper summarizes the typical geometric primitives modeling method of high-frequency scattering,which is reviewed in detail with respect to surface,wedge,and vertex scatterings.Besides the classical expressions of these typical scattering mechanisms,some simulation results are presented.The difficulties in characterizing typical scattering mechanisms and key scientific problems applied to SAR image interpretation are analyzed.Furthermore,this paper proposes a complete and extensive scattering characteristic characterization system by combining and interacting with the scattering primitives based on the corresponding geometric primitives.Finally,the feasibility of developing a scattering mechanism dictionary for use in interpreting SAR image scattering information is discussed.
作者
张旭
徐丰
金亚秋
ZHANG Xu;XU Feng;JIN Yaqiu(Key Lab for Information Science of Electromagnetic Waves(MoE),Hehai University,Shanghai 200433,China)
出处
《雷达学报（中英文）》
CSCD
北大核心
2022年第1期126-143,共18页
Journal of Radars
基金
国家自然科学基金(61991422)。
关键词
高频散射建模
几何基元
散射机制字典
面散射
线散射
点散射
High frequency scattering
Geometric primitives
Scattering mechanism dictionary
Surface scattering
Wedge scattering
Vertex scattering
