Restoration method for blurred star images based on region filters

doi:10.3788/CO.20191202.0321

CIOMP OpenIR

	Restoration method for blurred star images based on region filters
	J.Wang; X.He; Z.-H.Wei; Z.-Y.Mu; Y.Lv; J.-W.He
	2019
发表期刊	Chinese Optics
ISSN	20951531
卷号	12 期号:2 页码:321-331
摘要	Under the dynamic working conditions for a star sensor, motion blur will appear in a star because of its energy dispersion in the process of imaging, which leads to a decrease in the signal to noise ratio(SNR) and makes the blurred region difficult to extract. Meanwhile, this causes a degradation in star centroid positon accuracy and attitude accuracy in the star sensor. Therefore, a restoration method for blurred star images based on region filters is presented in this paper, which simultaneously concentrates on the improvement of SNR and star centroid accuracy. Firstly, the kinematic models of a star centroid under different conditions are set up based on the characteristics of star sensors. Secondly, the motion trail of star centroid is determined based on the kinematic model, allowing the star blurred region to be extracted. The images inside and outside the star blurred region are then preprocessed by image processing algorithm respectively. Finally, the blurred star image is restored by an image restoration algorithm. The experiment results indicate that under the dynamic condition of 2/s, the region filter algorithm can effectively improve the SNR of a blurred star image. In restored images, the error of star centroid is less than 0.1 pixels, which can satisfy the requirements for star sensor of high centroid accuracy. 2019, China Science Publishing & Media LTD. All right reserved.
关键词	Image reconstruction,Image enhancement,Kinematics,Restoration,Signal to noise ratio,Stars
DOI	10.3788/CO.20191202.0321
URL	查看原文
收录类别	EI
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63011
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J.Wang,X.He,Z.-H.Wei,et al. Restoration method for blurred star images based on region filters[J]. Chinese Optics,2019,12(2):321-331.
APA	J.Wang,X.He,Z.-H.Wei,Z.-Y.Mu,Y.Lv,&J.-W.He.(2019).Restoration method for blurred star images based on region filters.Chinese Optics,12(2),321-331.
MLA	J.Wang,et al."Restoration method for blurred star images based on region filters".Chinese Optics 12.2(2019):321-331.

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