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Proceedings Paper

Image characteristics and restoration for multi-sub-mirror synthetic aperture system
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Paper Abstract

This paper introduces radial multi-sub-mirror (MSM) synthetic aperture system structure and imaging characteristics of the liquid lens based, and the MSM array for the simulate imaging and image restoration. In order to obtain the scaling invariance of MSM system imaging, the dimensionless method is used to reduce the structural parameters. Baseline statistical distribution diagram and modulation transfer function (MTF) are used to analyze the structural characteristics and intermediate frequency(IF) characteristics. The MSM optical characteristics are calculated and the raw image is simulated under different filling factors. For the reduction of the IF characteristics of the synthetic aperture system, the raw image is restored by Wiener filtering. Using the standard deviation and peak signal-to-noise ratio between the synthetic aperture imaging system and the filled aperture imaging system, these two indicators evaluate the image quality with different fill factors. A comparative analysis of the restored images yields a relationship between filling factor and image quality. Since the large number of sub-mirrors in the MSM array, resulting in a larger number of different baselines. Because the baseline corresponds to the distribution characteristics of spatial frequency, the baseline of the MSM has a large number of repeats in the IF region, so the structure has a good response of IF. The results showed that as the sub-aperture diameter increases, the imaging quality of the MSM structure becomes better. The image restoration effect enhance with the increase of the filling factor. After wiener filtering, the image quality is improved.

Paper Details

Date Published: 19 November 2019
PDF: 7 pages
Proc. SPIE 11184, Optoelectronic Devices and Integration VIII, 111840Z (19 November 2019); doi: 10.1117/12.2536662
Show Author Affiliations
Xiaoyao Liu, Nanjing Univ. of Posts and Telecommunications (China)
Zhongcheng Liang, Nanjing Univ. of Posts and Telecommunications (China)
Weiqian Hao, Nanjing Univ. of Posts and Telecommunications (China)
Rui Zhao, Nanjing Univ. of Posts and Telecommunications (China)
Meimei Kong, Nanjing Univ. of Posts and Telecommunications (China)
Jian Fei Guan, Nanjing Univ. of Posts and Telecommunications (China)
Yue Zhang, Beijing Institute of Space Mechanics and Electricity (China)

Published in SPIE Proceedings Vol. 11184:
Optoelectronic Devices and Integration VIII
Xuping Zhang; Baojun Li; Changyuan Yu; Xinliang Zhang; Daoxin Dai, Editor(s)

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