基于CCD拖尾特性的空间目标单帧检测方法  

Detecting Method for Space Target in Single Frame Base on CCD Smear Characteristic

作　　者：董文娟[1] 王宏义[1] 黄宗福[1] 陈曾平[1] 

机构地区：[1]国防科技大学ATR重点实验室,长沙410073

出　　处：《信号处理》2009年第5期807-810,共4页Journal of Signal Processing

基　　金：国家"863"项目资助(2007AA703406;2007AA703121)

摘　　要：在固定天区长时间的天文观测中,为避免CCD相机的机械快门寿命限制造成的系统维护和运行不便,在观测中不使用机械快门,这种情况下CCD拖尾噪声对目标检测的影响相当严重。根据行转移CCD拖尾产生机理,首先分析了静止恒星目标竖直拖尾和运动空间目标倾斜拖尾的形成。结合实际工程对空间目标单帧检测的需求,在后续图像处理中提出了恒星拖尾的消除方法,消除了图像中的竖直直线,利用Hough变换检测倾斜直线进而实现空间目标的单帧检测,提高了检测精度减少了虚警。实验验证了该方法的有效性。In the long time astronomical observation of fixed sky region, in order to avoid the inconvenience of maintaining and operating system brought by the lifetime limitation of CCD＇s mechanical shutter,the mechanical shutter will not be used in observation. Under this circumstance the influence of CCD smear noise on target detection is much severe. Based on the working principle of interline transfer CCD smear,the forming mechanism of vertical smear of static stellar target and gradient smear of the moving space target is ana- lyzed. Combining with the actual engineering demand of detecting space target in single frame, a method of removing stellar smear is put forward in subsequent image processing and then the vertical line in image can be eliminated. Based on the previous processing resuh,a detecting method for space target in single frame by detecting the gradient line with Hough transform is put forward. The detecting precision is improved and the false alarm rate can be reduced. The experimental result of measured data shows the efficiency of the method.

关 键 词：目标检测 CCD 拖尾特性 HOUGH变换 空间目标 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]