基于特征匹配的空间目标ISAR图像横向定标  

ISAR image cross-range scaling for space target based on feature registration

作　　者：左潇丽 朱岱寅[1] 李俊强[2] ZUO Xiao-li ZHU Dai-yin LI Jun-qiang(College of Electronic and Information Engineering, Nanjing University ofA eronautics and Astronautics, Nanjing 211106, China Unit 63778, PLA , Jiamusi 154001, China)

机构地区：[1]南京航空航天大学电子信息工程学院 [2]中国人民解放军63778部队

出　　处：《电子设计工程》2017年第18期74-78,共5页Electronic Design Engineering

基　　金：江苏省产学研联合创新资金前瞻性研究项目(BY2014003-05);试验技术研究项目(2015SY26A0003);南京航空航天大学研究生创新基地(实验室)开放基金资助(kfjj20150405);中央高校基本科研业务费专项资金资助

摘　　要：逆合成孔径雷达(Inverse Synthetic Aperture Radar,ISAR)图像横向定标是获取目标外形和尺寸信息的关键,重点是目标转角的估计。提出了一种基于特征匹配的ISAR图像横向定标方法,将回波数据等长且相邻的ISAR卫星图像用Harris和SIFT算法提取特征点,然后利用随机采样一致性进行特征点配准,最后建立坐标位置差代价函数估计目标转角,完成ISAR图像横向定标。采用卫星仿真数据对算法进行了验证,实验结果表明该算法能够准确估计横向定标因子,定标精度高。The inverse synthetic aperture radar （ISAR） image cross-range scaling is the key technique for obtaining the dimension and shape of targets, and the key point is the estimation of the rotation angle estimation. A new ISAR image cross-range scaling method based on feature registrationis presented. Firstly, adequate interested points are extracted from two adjacent ISAR images of satellite target by Harris and SIFT. Secondly, those points are pinpointed by matching with Radon Sample Consensus （RANSAC） principles. At last, the cost function of the coordinate-difference is established to estimate the rotation angle. The processing results of simulated data of satellite show that the algorithm has a good performance.

关 键 词：逆合成孔径雷达 横向定标 转角估计 特征匹配 INVERSE SYNTHETIC APERTURE Radar(ISAR) 

分 类 号：TN958[电子电信—信号与信息处理]