Space-based Space Target Detecting (SSTD) has great advantages than that of ground-based, so it is a necessary tendency to make efforts to develop this technology. This paper firstly analyses the effects on visible light imaging caused by the severely space environment, models the space-based image. After that, a new algorithm for target detecting and tracing is presented. Experiment results based on ground-measured data show that the performance of the algorithm are satisfying when the SNR of image sequences is greater than 4, and it has the capability of multi-target detecting and tracking.
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