基于光流法的目标三维散射中心重构  

An Effective Method of Reconstruction of Three-Dimensional Scattering Centers Based on Optical Flow

作　　者：谢松云[1] 何华兵[1] 许家栋[1,2] 王颖[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072 [2]空间微波技术重点实验室,陕西西安710100

出　　处：《西北工业大学学报》2013年第2期289-294,共6页Journal of Northwestern Polytechnical University

基　　金：空间微波技术重点实验室基金(9140C530303110C5304);国家自然科学基金(61273250);西北工业大学研究生创业种子基金(Z2013085)资助

摘　　要：研究了基于逆合成孔径雷达(ISAR)图像序列的三维散射中心重构,针对干涉逆合成孔径雷达(InISAR)不能分辨同一距离和方位单元中多个散射点的问题,提出了一种基于光流分析的目标三维散射中心重构方法。通过对不同姿态下的同一运动目标进行距离-多普勒(R-D)成像,得到二维ISAR图像序列,然后对ISAR图像分别进行距离-方位向定标,通过引入计算机视觉理论中正投影的概念,并利用光流分析得到目标三维散射中心。仿真结果表明,该方法具有目标三维散射中心重构的能力,且能够得到较高质量的目标像。Three-dimensional scattering centers reconstruction using inverse synthetic aperture radar （ISAR） ima- ges is studied, and a three-dimensional scattering centers reconstruction method based on optical flow is proposed to solve the problem that the interferometric inverse synthetic aperture radar （InISAR） system cannot distinguish the targets with the same range distance and azimuth but having different amplitudes. First, a sequence of ISAR images can be acquired by Range-Doppler imaging of the target under different attitudes. Secondly, these ISAR images are processed by range and azimuth scaling, and three-dimensional scattering centers of the target are acquired by introducing the concept of the orthographic projection in computer vision theory and using the optical flow method. Sim- ulation results and their analysis show preliminarily that the proposed method has the capability of three-dimensional scattering centers reconstruction and high quality image acquisition.

关 键 词：计算机视觉 逆合成孔径雷达成像 光流 散射中心 三维重构 

分 类 号：TN957.52[电子电信—信号与信息处理]