第18卷第2期 2010年2月
文章编号1004-924X(2010)02-0477-08
光学精密工程
Optics and Precision Engineering
空间小目标动态规划检测王学伟"，王春歆"，张玉叶1,2，徐景硕
（1.海军航空工程学院控制工程系，山东烟台264001： 2.海军航空工程学院青岛分院，山东青岛266041）
Vol.18No.2 Feb.2010
过程。针对工程应用中为了获取亚像素质心而对图像散焦处理的情况，对原算法的评价函数递归方程进行改进，提出用方向加权的多点能量累积代替原算法的单点累积，并将多速度平面分别计算的方式简化为速度初始化与历史速度修正方式。最后，针对算法实现过程中遇到的初始状态计算、恒虚警阔值以及轨迹数据结构等关键间题进行了说明。在实验参数条件下，计算量比原算法减少了约50%。实摄图实验结果表明，方向加权的多点累积算法5顿即可检测出目标，面原算法在第10赖时仍有大量虚假轨迹；在第5赖的20条最大评价值轨遵中，多点法的评价值信噪比比原算法提高
42%。方向加权的多点累积算法可以有效抑制额立噪声点产生的虚警，提高算法的检测能力。关键询：动态规划；小目标检测；多点累积；空间图像
中图分类号：TP391.41；V557.3
文献标识码：A
Detectionofsmallspacetargetbydynamicprogramming
WANGXue-wei'，WANGChun-xin',ZHANGYu-ye-2,XU Jing-shuo
(l.Control EngineeringDepartment,NavyAeronauticaland
AstronauticalUniversity,Yantai2640o1,China;2.QingdaoBranch,NavyAeronautical
andAstronauticalUniversity，Qingdao26604l,China)
Abstract: An improved dynamic programming algorithm was presented to detect space small targets from sequence images. Firstly, the development and current situation of the dynamic programming al-gorithm used in small target detections were introduced. As the defocus was used to process common-ly a project to obtain the sub-pixel center of a target,the recursive equation of score function was im-proved. A multi-point accumulation algorithm with direction weight was presented to replace the sin gle-point accumulation in an original algorithm, and the original multispeed plane calculation was also simplified. Finally, the key processes including state initialization, constant false alarm rate threshold and track data structure were discussed, The analysis indicates that the computational complexity has reduced about 5o% as compared with that of original algorithm. Experimental results also indicate that targets can be detected in 5th frame with the multi-point algorithm, while a number of fake tracks
收稿日期：2008-11-04；修订日期：2008-12-05
基金项目：国家863高技术研究发展计划资助项目（No.2006AA703213D)