Performance optimization of three down-sampling imaging strategies and their comparison with the conventional Fourier telescope
文献类型：期刊论文
| 作者 | L.Dong; Z.W.Lu; X.Y.Liu; Z.W.Li |
| 刊名 | Acta Physica Sinica
 |
| 出版日期 | 2019 |
| 卷号 | 68期号:7页码:9 |
| ISSN号 | 1000-3290 |
| 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 |
| 英文摘要 | 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. |
| URL标识 | 查看原文 |
| 语种 | 中文 |
| 源URL | [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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