摘要
通过转角估计的方法对舰船目标ISAR图像进行尺寸标定,进而利用船体尺寸特征进行舰船目标识别。舰船目标的晃动造成ISAR图像中目标相对大小与实际大小不一致,为后续大小型舰船的识别带来困难,文中对海浪导致的多个舰船目标晃动成像模型进行分析,并对同一幅ISAR图像中的多个舰船目标分别进行尺寸估计,解决图像中大小型舰船成像效果矛盾的问题。
In this paper, the method of rotation angle estimation is used for ship-target cross-range dimension estimation and then ships with different sizes can be recognized. The swings of the ships make their relative sizes in ISAR images contradict with their real sizes, so it is difficult to recognise big ship and small ship. In this paper, the mathematical model of multi-ship 3D motions is analyzed, and ISAR imaging model under this condition is researched. Then cross-range dimension estimation algorithm is presented and performed to solve the contradiction between the real sizes of ships and their relative sizes in ISAR images.
出处
《雷达科学与技术》
2009年第4期253-256,288,共5页
Radar Science and Technology
基金
新世纪优秀人才支持计划(No.NCET-06-0921)
关键词
转角估计
角速度
海情
方位分辨率
rotation angle estimation
angular velocity
sea condition
cross range resolution
