利用RD模型和DEM数据的高分辨率机载SAR图像模拟  

High-resolution airborne SAR image simulation based on RD model and DEM data

作　　者：王庆[1] 曾琪明[1] 焦健[1] 云烨[1] 周晓[1] 

机构地区：[1]北京大学遥感与GIS研究所,北京100871

出　　处：《测绘科学》2013年第4期134-137,共4页Science of Surveying and Mapping

基　　金：国家863课题(2008AA121806);教育部博士点基金(20090001110039)

摘　　要：本文提出一种利用DEM数据基于RD模型的SAR图像模拟方法。该方法选择了Muhleman后向散射系数模型模拟SAR图像的辐射特性,引入SAR成像中的RD模型直接进行几何变换和灰度重采样模拟出SAR图像的几何特征。实验结果分析表明:模拟的SAR图像和真实SAR图像在图像纹理和几何关系上是一致的,而且几何关系可以精确配准到均方根误差为1.3个像素。The paper proposed a method with Range-Doppler model for airborne SAR simulation based on DEM data. It discussed the simulation process from the radiation characteristics and geometric feature of SAR image. The Muhleman backscattering coefficient model was selected as a simulation of radiation characteristics. By combing the RD geometric model, the simulation image does not need to consider independently about the geometric distortion of SAR image like shadow, foreshorten, etc. The research showed that the simulation had the same characteristic in the image texture, and geometric relationships were precisely consistent with the real SAR image by analyzing the control points on two images. And the simulation results could directly demonstrate that the method is an easy and efficient means of realizing the SAR radiometric and geometric simulation without more consideration on geometric distortion.

关 键 词：SAR图像模拟 DEM RD模型 高分辨率SAR 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]