国防科技大学学报2016，Vol.38Issue(6)：95-103,190,10.DOI:10.11887/j.cn.201606016
压缩感知稀疏重构对星图的影响
Effect of compressive sensing sparse reconstruction on star image
摘要
Abstract
The sparse reconstruction is one of the key factors in compressive sensing theory.In order to apply sparse reconstruction to compressive imaging process of star tracker in an effective way,the effect of sparse reconstruction on star image was analyzed from the perspectives of star image error and star feature error.For the problem of image error,PSNR(peak signal-to-noise ratio)evaluation index was employed to observe reconstruction quality of star image under different reconstruction algorithm and diverse compression ratio.For the problem of feature error, firstly,the influential mechanism of sparse reconstruction on star feature was analyzed theoretically;and then the evaluation index of reconstruction error of star feature was proposed to investigate the reconstruction error of star centroid,brightness and number.Result shows that,the star image can obtain higher reconstruction quality than the common image with the same reconstruction condition under diverse compression ratio of selected algorithm,and the reconstructed star can keep its features for attitude determination to a large extent.The conclusion proves the validity of attitude estimation by using the reconstructed star image,verifies the feasibility of applying compressive sensing to star tracker and provides the practical foundation for compressive imaging of star tracker.关键词
压缩感知/稀疏重构/恒星敏感器/恒星图像Key words
compressive sensing/sparse reconstruction/star tracker/star image分类
信息技术与安全科学引用本文复制引用
尹航,闫野,宋新..压缩感知稀疏重构对星图的影响[J].国防科技大学学报,2016,38(6):95-103,190,10.基金项目
国家自然科学基金资助项目 （）
