光学精密工程2026，Vol.34Issue(8)：1189-1202,14.DOI:10.37188/OPE.20263408.1189
空间目标白天光学探测中的散斑滤波方法
Speckle filtering method in daytime optical detection of space targets
摘要
Abstract
Ground-based optical telescopes play an important role in space domain awareness.To address the degradation of detection capability caused by sky background radiation and atmospheric turbulence,this paper proposed a speckle filtering method based on atmospheric turbulence characteristics.First,the method performed cumulative summation on sequentially stored multi-frame images to obtain a high signal-to-noise ratio(SNR)observation image through long integration time.Then,target speckles could be ex-tracted from the accumulated image,with an appropriate extraction threshold,combined with connected component detection and size-based filtering.Subsequently,a direction independence speckle filter with matching size was constructed based on the extracted speckle patterns from the accumulated image.Final-ly,the speckle filter was applied to the latest single-frame observation image for spatial-domain filtering,enabling effective target extraction.Experimental results show that for the observation of faint space tar-gets under strong atmospheric turbulence and sky background radiation,the proposed speckle filtering method can improve the detection capability of ground-based telescopes by more than 0.93 magnitudes.The speckle filtering method is characterized by simple computation,fast processing and strong robust-ness,enabling ground-based optical telescopes to achieve better performance in space object detection.关键词
地基光学望远镜/白天探测/大气湍流/散斑滤波/信噪比Key words
ground-based optical telescope/daytime detection/atmospheric turbulence/speckle filter-ing/SNR分类
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毕寻,王伟国,陈强,张振东,董全睿,刘阳,刘廷霞..空间目标白天光学探测中的散斑滤波方法[J].光学精密工程,2026,34(8):1189-1202,14.基金项目
国家自然科学基金资助项目(No.12503089) （No.12503089）
吉林省科技发展计划项目(No.20250602034RC) （No.20250602034RC）
