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

共 15 条

[1]

Ding X., Hu X., Wang W., Et al., Effect of shutter-type baffle on energy concentration of Cassegrain system, Journal of Chinese Inertial Technology, 2, pp. 241-246, (2018)

[2]

Wang W., Wei X., Li J., Et al., Noise suppression algorithm of short-wave infrared star image for daytime star sensor, Infrared Physics & Technology, 85, 8, pp. 382-394, (2017)

[3]

Guide star catalog generation for short-wave infrared (SWIR) all-time star sensor, Review of Scientific Instruments, 89, 7, (2018)

[4]

Belenkii M., Bruns D.G., Rye V.A., Et al., Daytime stellar imager

[5]

Wu L., Xu Q., Wang H., Et al., Guide Star Selection for the Three-FOV Daytime Star Sensor, Sensors, 19, 6, (2019)

[6]

Wang W., Wei X., Li J., Et al., Optical Parameters Optimization for All-Time Star Sensor, Sensors, 19, 13, (2019)

[7]

O'Malley M.J., O'Mongain E., Charge-coupled devices: frame adding as an alternative to long integration times and cooling, Proceedings of SPIE - The International Society for Optical Engineering, 31, 3, pp. 522-526, (1992)

[8]

Hu X., Hu Q., Lei X., Et al., Method of star centroid extraction used in daytime star sensors, Journal of Chinese Inertial Technology, 4, pp. 481-485, (2014)

[9]

Gao Z., Wang H., Gao H., Et al., Inter-frame shifted window gray superposition method of dim star image extraction and centroiding, Infrared and Laser Engineering, 46, 2, pp. 238-244, (2017)

[10]

Shiqiao Q., Dejun Z., Zheng J., Et al., Dynamic attitude measurement method of star sensor based on gyro's precise angular correlation

← 1 2 →