Improving the Spatial Resolution of Small Satellites by Implementing a Super-Resolution Algorithm Based on the Optical Imaging Sensor's Rotation Approach

被引：3

作者：

Kazemi, Iman ^{[1
]}

Najafabadi, Mojtaba Abolghasemi ^{[1
]}

Shafiee, Morteza ^{[1
]}

机构：

[1] Malek Eashtar Univ Technol MUT, Dept Elect & Comp Engn, Tehran, Iran

来源：

IEEE SENSORS JOURNAL | 2024年 / 24卷 / 24期

关键词：

Spatial resolution; Imaging; Superresolution; Optical sensors; Optical imaging; Image reconstruction; Image sensors; Sensor arrays; Hardware; Charge coupled devices; Modulation transfer function (MTF); oblique sampling; small satellite; spatial resolution; super-resolution (SR); SYSTEM;

D O I：

10.1109/JSEN.2024.3479268

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this article, aiming to improve the spatial resolution of small satellite optical imaging, we propose a super-resolution (SR) algorithm based on the rotation of charge-coupled device (CCD) sensor sampler. The proposed method can effectively increase sampling density in both satellite's flight direction and vertical direction to obtain images with a higher overlap ratio, thus acquiring more information than conventional optical satellites. We have proposed an SR algorithm to reconstruct high-resolution (HR) images using the obtained data, which can significantly improve the spatial resolution of remote-sensing satellite images. In addition, a method for quantitative evaluation of image quality improvement based on the modulation transfer function (MTF) is proposed. It is shown that the MTF value at a given spatial frequency and Nyquist frequency of the proposed method has increased by 0.1607 (39%) and 1.88 times, respectively, compared to standard sampling. In addition, sampling frequency of the proposed method has improved by 1.34 and 1.06 times compared to 45 degrees and 26.56 degrees oblique sampling, respectively. Also, the field of view (FOV) of imaging system of the proposed method is improved by 0.24 degrees and 0.05 degrees compared to 45 degrees and 26.56 degrees oblique sampling, respectively.

引用

页码：40329 / 40342

页数：14

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