基于约束TBD的GEO目标在轨检测方法

Restricted TBD Method for On-orbit Detection of a GEO Target

天基空间目标观测图像受天地杂光、空间辐射等因素干扰,图像信噪比普遍较低,目标自动检测难度较大,目标在轨检测受星上计算资源约束更加困难。为提高天基观测图像的目标在轨检测效率与准确性,提出一种基于约束TBD的目标自动检测方法,在分析高信噪比与低信噪比目标运动规律与成像特点的基础上,采用分步检测方法,根据高信噪比目标运动规律约束低信噪比目标的检测过程,降低了低信噪比目标检测的计算量。实验证明了该方法的有效性和准确性,当累积帧数达到6帧或者7帧时可达到较好的检测效果。

The images of space-based observation are disturbed by miscellaneous light, space radiation and other factors, usually the signal-to-noise ratio(SNR) of the GEO targets in images are low, and the automatic target detection is difficult, especially for the on-orbti detection situation with limited calculating resources. In order to improve the efficiency and accuracy of the GEO targets detection in the space-based observation images, a new method based on the restricted TBD is proposed here, the motion and imaging features of the high SNR targets and low SNR targets are analyzed, and the step-by-step method is used to detect all targets. The motion features of the high SNR targets are utilized to reduce the calculation of the TBD method. The effectiveness and robustness of the method are validated by testing on simulation images, and the method proposed achieves good effect by accumulating 6 or 7 frames.