计算机工程与应用 ›› 2012, Vol. 48 ›› Issue (32): 125-128.

• 数据库、信号与信息处理 • 上一篇    下一篇

基于图像熵的线性阵列ISAR成像处理方法

高  强1，薛  乐2，王振楠1，魏  欣3   

  1. 1.装甲兵技术学院 电子工程系，长春 130117
    2.北京航天飞行控制中心，北京 100720
    3.装备指挥技术学院 光电装备系，北京 101416
  • 出版日期:2012-11-11 发布日期:2012-11-20

Imaging processing method for linear array ISAR based on image entropy

GAO Qiang1, XUE Le2, WANG Zhennan1, WEI Xin3   

  1. 1.Department of Electronic Engineering, Armor Technique Institute of PLA, Changchun 130117, China
    2.Beijing Aerospace Control Center, Beijing 100720, China
    3.Department of  Optical and Electronic Equipment, Academy of  Equipment Command and Technology, Beijing 101416, China
  • Online:2012-11-11 Published:2012-11-20

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摘要： 研究一种线性阵列逆合成孔径雷达（LAA ISAR）的成像处理方法。分析线性阵列ISAR的几何模型并给出成像处理流程。针对阵列ISAR同时接收多路回波信号的特点，采用传统的距离－多普勒算法对每路回波进行成像；利用互相关法进行图像粗配准；在此基础上利用图像熵法进行图像细配准，得到匹配的目标图像。基于该处理流程的仿真实验表明，该处理方法能够充分利用阵列ISAR的每路回波信息，使目标图像精确配准，且能有效提高目标分辨率。

关键词: 逆合成孔径雷达（ISAR）, 线性阵列天线（LAA）, 图像配准, 互相关, 图像熵

Abstract: An imaging processing method for the Linear Array Antenna ISAR（LAA ISAR） is concerned. The geometry model of LAA ISAR is analyzed and the imaging processing flow is given as well. Based on the character that LAA ISAR can receive multi-path echoes, range-Doppler algorithm is adopted to realize the image of each echo. The cross-correlation method is used for image rough registration. On the basis of it, the method based on image entropy is used for image fine registration, and the matched image is obtained. Simulation results based on this processing flow show that this method can make use of every echo adequately, the image registration is realized finely, and the target resolution is enhanced effectively.

Key words: Inverse Synthetic Aperture Radar（ISAR）, Linear Array Antenna（LAA）, image registration, cross-correlation, image entropy

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