Regarding the numerous stellar targets with similar image characteristics that interfere with space targets detection in fixed-direction terrestrial astronomical opto-electronic observation systems

an algorithm of stellar targets suppression based on temporal-spatial domain fusion is proposed. In the time domain

the conventional image difference algorithm is improved and the dilative difference method is used to suppress stellar targets. In the space domain

mathematical morphological reconstruction is used to restore the full image of the detected stellar targets

and then stellar targets are suppressed through the difference between images before and after the morphological reconstruction. Based on different temporal-spatial domain fusion mechanics

two different temporal-spatial fusion methods are proposed to suppress stellar targets. Through comparison of real-measured data

the results show that the algorithm presented in this paper achieves a good stellar targets suppressing effect: 1)stellar targets and their edge pixels are efficiently suppressed; 2)the faint stellar targets are suppressed well; 3)signal-to-noise ratio of space targets are improved after the suppression of stellar targets.