基于背景抑制的星空图像目标运动轨迹提取  

Target trace acquisition method of star images based on background elimination

作　　者：张春华[1] 周晓东[1] 陈维真[2] 

机构地区：[1]海军航空工程学院控制工程系, 山东烟台264000 [2]中国海洋大学信息技术学院, 山东青岛266000

出　　处：《红外与激光工程》2008年第1期143-146,共4页Infrared and Laser Engineering

基　　金：国家863计划资助项目(2006AA0627)

摘　　要：研究了空间观测CCD图像弱小目标检测与运动轨迹提取技术,介绍了一种基于背景抑制的多目标检测与运动轨迹提取方法。首先,对图像进行阈值处理,滤除图像的背景灰度和噪声;然后生成基于序列图像叠加与形态学变换相结合的背景掩模图像,对序列图像进行屏蔽处理,得到运动目标图像;对目标图像进行交叉投影算法确定目标区域,并进一步精确确定目标质心,进而提取目标的运动轨迹。实验证明所提出的算法不仅能够有效检测星空序列图像中的多个弱信号小目标,而且具有较强的实时性。An investigation about an algorithm for space target trace acquisition is carriedout.An algorithm for multi-target trace acquisition method based on background elimination of CCD star images is put forward.First is the pretreatment,every pixel whose gray value is below the threshold will be set as a black pixel,other pixels remain invariable.Then,a mask is created based on addition of the serial images dealt by threshold previously and morphologic dilation operation.The mask can shield fixed stars and preserve the moving targets.In the following,a cross-projection method is used in target region determination,and the precise position of the targets can be calculated using centroid method from the target region,so the targets trace can be acquired.Experimental results show that the algorithm can detect faint targets effectively in serial star images with virtues of high real-time.

关 键 词：轨迹提取 形态学变换 交叉投影 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]