Abstract: Aiming at the observation behavior of reconnaissance satellite approaching the target by changing orbit, a method of behavior identification for near target based on visual characteristics was proposed. By tracking the feature points of the adjacent target in the image sequence, the trajectory change was obtained. Afterwards, the representation of the possible abnormal behavior of the target in the image was analyzed, and the characteristic parameters were constructed based on the obtained information to judge the target behavior. The experimental results show that the algorithm can process the continuous images under different illumination conditions, and realize the effective identification of the space reconnaissance behaviors with attitude changes of adjacent targets.

Key words: adjacent targets, behavior identification, visual characterization, behavior parameters, trajectory tracking