A Moving Multi-Target Capture Algorithm for a Celestial Background

The main task of MTD (micro-spacecraft target detector) is to identify the targets in the celestial space. There are movements relative to targets, background and MTD in the space. In order to capture the targets intermixed in the celestial background, a new method is introduced. Firstly, the effective background dots in the frame are labeled and those pixels firstly labeled in their dots remain while others are made zero; secondly, the image registration is achieved between the two first-labeled images which have been compressed. After matching, the first-labeled difference algorithm is used to wipe off the first-labeled pixels which represent noise points and stars. Lastly, according to the values of those non-zero pixels that remain, we obtain the targets. Based on theoretical calculations and computer simulation, this method can reduce the calculation amount significantly. The multi-target capture can be timely achieved.