基于复合电磁散射的典型目标与自然环境极化SAR图像建模

项目名称： 基于复合电磁散射的典型目标与自然环境极化SAR图像建模

项目编号： No.61201366

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 夏伟杰

作者单位： 南京航空航天大学

项目金额： 22万元

中文摘要： SAR图像在本质上是地物对电磁波散射率大小的分布图，基于不断发展的复合电磁散射计算理论，使得在计算机上模拟SAR图像成为可能。本项目研究典型军事目标和自然环境的极化SAR图像建模问题，将几何建模、电磁散射计算和SAR成像原理相结合，构建一套完整的SAR图像建模方法。具体研究内容包括：1）基于照片复原的典型军事目标的精确几何建模；2）基于分形几何的自然环境的几何建模；3）目标和环境的复合场景的几何建模；4）基于高频电磁计算方法的典型军事目标的电磁散射计算；5）基于随机粗糙面理论和VRT理论的自然环境的自然散射计算；6）基于射线跟踪法的目标和环境的复合电磁散射计算；7）电磁散射率到SAR图像的快速投影法研究；8）SAR图像建模的效果评价。通过上述环节的研究，突破关键技术，促进SAR图像建模技术在目标自动识别等方面的应用。

中文关键词： SAR图像仿真；射线跟踪法；映射投影法；建筑物反演；斑点噪声仿真

英文摘要： SAR image is essentially a distribution map of the electromagnetic scattering rate. Based on the continuous development of composite electromagnetic scattering theory, the SAR image simulation becomes possible on PC. This project focuses on the SAR image simulation of the typical military targets and the natural environment. It dedicates to build a complete set of SAR image modeling method which combine the geometric modeling, electromagnetic scattering calculation and SAR imaging principle. Specific research contents include: 1) Typical military targets precise geometric modeling based on photo restoration; 2) Natural environment geometric modeling based on fractal geometry. 3) Geometric modeling of the natural environment and targets; 4)Calculation of the electromagnetic scattering of a typical military targets based on high-frequency method; 5) Calculation of electromagnetic scattering of the natural environment based on random rough surface scattering theory and VRT theory; 6) Calculation of composite electromagnetic scattering of the target and environment based on SBR method; 7) SAR image fast projection method; 8) Evaluation of the validation of the SAR image simulation. By the reseach of above-mentioned contents and breakthroughs in key technologies, we will make the SAR image simulation technology re

英文关键词： SAR image simulation；shooting and bouncing rays；mapping and projection algorithm；urban structures inversion；speckle noise simulation