一种运动背景序列星图弱小目标运动轨迹提取算法

Track acquisition method of dim target in star images of moving background

提出了一种序列星图中目标的运动轨迹提取算法。利用交叉投影方法提取星点,确定包含星点的区域;提出一种基于自适应窗口选择PIV技术的序列星图全局运动参数估计算法,并对序列星图进行配准,滤除背景恒星;提出一种目标运动轨迹的提取算法。实验结果表明该算法对于空间小目标(≥1 pixel)在序列图像中运动轨迹不连续的情况可以进行准确的运动轨迹提取,具有较强的鲁棒性。

A track acquisition algorithm of dim target in serial star images of moving background is proposed. Originally, an algorithm named cross projection is used to identify the area of background star and targets. Then, a movement parameter estimation method based on particle image velocimetry（PIV） is provided. Finally,a target track acquisition method is pro posed. The simulation experiment is done with two small targets in 16 frame serial star images. Results show that the algo rithm can detect both the track of dim targets with high accuracy. The algorithm provides a good way for track acquisition of dim targets whose track may be discontinuous.