Journal of Systems Engineering and Electronics ›› 2010, Vol. 32 ›› Issue (12): 2565-2569.doi: 10.3969/j.issn.1001-506X.2010.12.16

• 传感器与信号处理 • 上一篇    下一篇

基于图像配准的弹道目标ISAR图像横向定标

金光虎1, 高勋章1, 黎湘1, 陈永光2   

  1. 1. 国防科学技术大学电子科学与工程学院, 湖南 长沙 410073; 
    2. 中国人民解放军63880部队, 河南 洛阳 471003
  • 出版日期:2010-12-18 发布日期:2010-01-03

ISAR image cross scaling method for ballistic target based on image registration

JIN Guang-hu1, GAO Xun-zhang1, LI Xiang1, CHEN Yong-guang2   

  1. 1. School of Electronics Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;
    2. Unit 63880 of the PLA, Luoyang 471003, China
  • Online:2010-12-18 Published:2010-01-03

摘要:

逆合成孔径雷达(inverse synthetic aperture radar, ISAR)图像横向定标是估计目标外形尺寸的关键。针对弹道目标,从理论上证明了任意两幅ISAR图像仅当横向正确定标的情况下才能完全配准。基于这一原理,提出了一种新的基于控制点仿射变换的ISAR图像横向定标方法,给出了横向比例尺的计算过程。最后采用测量数据对算法进行了验证,仿真实验结果表明,该算法能够准确估计横向比例尺,定标精度较高。

Abstract:

The inverse synthetic aperture radar (ISAR) image cross scaling is the key technique for extracting the dimension and shape of radar targets. For ballistic targets, the paper verifies that the ISAR image can be registered only when the cross range is right scaled. Based on this conclusion, a new ISAR image scaling method based on affine transform is presented. The cross ratio is evaluated based on the registration matrix. The experiment result shows the algorithm has a good performance.