An Image Signal-to-Noise Ratio Enhancement Method Based on Attitude Correlated Frames Adding

被引：0

作者：

Dai D. ^{[1
]}

Wu Z. ^{[1
]}

Tan W. ^{[1
]}

Wang X. ^{[1
]}

Ni Y. ^{[1
]}

机构：

[1] College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, Hunan

来源：

Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | 2020年 / 28卷 / 01期

关键词：

Attitude correlated frame; Gyroscopes; Signal-to-noise ratio; Star tracker;

D O I：

10.13695/j.cnki.12-1222/o3.2020.01.013

中图分类号：

学科分类号：

摘要：

Since the stellar light signal is easily overwhelmed by the noise induced by strong sky background, the star tracker cannot work properly in the daytime. In order to improve the star detection ability of star trackers, an image signal-to-noise ratio (SNR) enhancement method based on attitude correlated frames adding under the dynamic condition for star tracker is proposed. The method uses the gyroscopes to measure the attitude changes of each image frame related to the reference frame. And the translation and rotation transformations (namely correlated transformation) between different frame star images are conducted. Finally, the correlated frames are added together, so that the SNR of the star image increased by √n times (n is the number of frames of the associated star image), and the working ability of daytime star tracker in the daytime is improved. The simulation results show that the proposed method can effectively enhance the SNR of the star images, and is less affected by the error of the inertial sensors and installation angles, so the feasibility is proved. © 2020, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.

引用

页码：82 / 88

页数：6

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