卷帘快门式CMOS探测器的星图像移补偿

张博研; 孔德柱; 刘金国; 武星星; 董得义

doi:10.37188/CO.2020-0089

Volume 13 Issue 6

Dec. 2020

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Article Contents

Chinese Optics > 2020 > 13(6): 1276-1284.

ZHANG Bo-yan, KONG De-zhu, LIU Jin-guo, WU Xing-xing, DONG De-yi. Compensation of star image motion for a CMOS image sensor with a rolling shutter[J]. Chinese Optics, 2020, 13(6): 1276-1284. doi: 10.37188/CO.2020-0089

Citation:

ZHANG Bo-yan, KONG De-zhu, LIU Jin-guo, WU Xing-xing, DONG De-yi. Compensation of star image motion for a CMOS image sensor with a rolling shutter[J]. Chinese Optics, 2020, 13(6): 1276-1284. doi: 10.37188/CO.2020-0089

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Compensation of star image motion for a CMOS image sensor with a rolling shutter

doi: 10.37188/CO.2020-0089

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Funds: Supported by National Key Research and Development Program (No. 2016YFB0500100, No. 2016YFB0501002); National Natural Science Foundation of China (No. 11873007)

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Corresponding author: boyan1021@163.com
Received Date: 09 May 2020
Rev Recd Date: 15 Jun 2020

Available Online: 29 Oct 2020

Publish Date: 01 Dec 2020

Abstract

Abstract

According to the imaging principles and characteristics of a shutter CMOS image sensor, the shutter effect introduced by a shutter CMOS image detector operating on a star map is analyzed, and an image shift compensation method is proposed to rectify the image distortion introduced by this kind of imaging method. With the known frame frequency of the star images and the exposure time interval of the adjacent rows of the CMOS graphic sensor, this method can achieve high-speed calculation of star motion by extracting and matching the centroid of the star points in an adjacent star map. The centroid of the star points in a global image is calculated by combining the speed value with the row exposure time interval of the CMOS image sensor. The effect of the algorithm is tested on actual star images. The experimental results show that with the compensated star map, angle errors between the star sensors are smaller than 0.5″ when a satellite is in non-maneuver mode, and angle errors between either of the star sensors are about 0.6″ when the satellite is in maneuver mode. The experimental results not only prove the effectiveness of the algorithm, but also broaden the applications of shutter CMOS detectors to some extent, especially in aerospace engineering.
- CMOS image sensor,
- rolling shutter,
- star map,
- star extraction,
- star point matching

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References(23)

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