Performance optimization of three down-sampling imaging strategies and their comparison with the conventional Fourier telescope

doi:10.7498/aps.68.20181801

CIOMP OpenIR

	Performance optimization of three down-sampling imaging strategies and their comparison with the conventional Fourier telescope
	L.Dong; Z.W.Lu; X.Y.Liu; Z.W.Li
	2019
发表期刊	Acta Physica Sinica
ISSN	1000-3290
卷号	68 期号:7 页码:9
摘要	In order to obtain a new imaging strategy of the Fourier telescope (FT) with a better imaging quality and a less imaging time, we optimize and compare three down-sampling imaging strategies in this paper: the compressed sensing method (CS), the low-frequency full sampling method (LF) and the variable-density random sampling method (VD), which are different from the traditional Fourier telescope in both of the image quality and the imaging time. The analytical methods are as follows: based on the target's spectral data obtained from the field experiment of traditional FT, three down-sampling methods (LF, VD and CS) are used to reconstruct the target' s images according to their own sampling modes and reconstruction methods, respectively; the differences between the three down-sampling methods and the traditional FT regarding the image quality are compared by the instinctive observation and the Strehl ratio; based on the analysis of the imaging time, the differences between the three down-sampling methods and the traditional FT regarding the imaging time are preliminarily compared. The analysis shows that: 1) the image quality of the compressed sensing method is better than that of the other two down-sampling methods (LF and VD), slightly lower than that of the traditional imaging; 2) although the image quality of the compressed sensing method is slightly lower than that of the traditional FT, its imaging time is much lower than that of the traditional FT; 3) the field data used in the analysis contain noises, which means that the reconstruction methods of the above three down-sampling strategies have a better robustness to the noises. Based on the above results, it can be seen that the Fourier telescope based on compressed sensing (CS-FT) is an excellent imaging strategy which can greatly reduce the imaging time in the condition with actual noises.
关键词	synthetic aperture imaging,Fourier telescope,image reconstruction,techniques,compressed sensing,national testbed glint,turbulence,mri,Physics
DOI	10.7498/aps.68.20181801
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收录类别	SCI ; EI
语种	中文
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63410
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	L.Dong,Z.W.Lu,X.Y.Liu,et al. Performance optimization of three down-sampling imaging strategies and their comparison with the conventional Fourier telescope[J]. Acta Physica Sinica,2019,68(7):9.
APA	L.Dong,Z.W.Lu,X.Y.Liu,&Z.W.Li.(2019).Performance optimization of three down-sampling imaging strategies and their comparison with the conventional Fourier telescope.Acta Physica Sinica,68(7),9.
MLA	L.Dong,et al."Performance optimization of three down-sampling imaging strategies and their comparison with the conventional Fourier telescope".Acta Physica Sinica 68.7(2019):9.

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