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中文摘要：
为了实时性捕获混杂在天基背景中的运动目标，采用一种基于有效点的质心提取与消旋配准相结合的比较差分算法。首先对天基背景有效点进行标记并质心提取，根据航天器定位系统提供的参考旋转角度进行适度消旋配准，再平移配准参照帧的有效点质心坐标，根据完全配准时有效点质心坐标相同点最多的原则，得出配准点，配准后比较差分去除相同背景点，提取出目标。仿真结果表明该算法计算量小，虚警率低，适合微型航天器实时多目标捕获的要求。
英文摘要：
In order to capture the targets which were intermixed in the space background, a comparative different method based on the integration of eliminating rotation and distilling the centroid was introduced. Firstly, the effective background dots in the frame were labeled and centroid was distilled. Then, according to the referenced angle provided by the satellite orientation system, appropriate registration was made which can eliminate the rotation. Thirdly, according to the principle that the number of centroid which has the same coordinates reach the maximum when it is totally registration, the coordinates of the effective dots in the referenced frame were deleted, so gained the registration coordinates. At the last, comparative difference algorithm was used to wipe off the same background dots and obtain the targets. The stimulation result showed that the calculation was little; the probability of error was small. It can fit the multi-target capture of microspacecraft timely.
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