Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions
Under the dynamic working conditions of a star sensor, motion blur of the star will appear due to its energy dispersion during imaging, leading to the degradation of the star centroid accuracy and attitude accuracy of the star sensor. To address this, a restoration method of a blurred star image for...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/19/4127 |
| _version_ | 1798035410685788160 |
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| author | Zhiya Mu Jun Wang Xin He Zhonghui Wei Jiawei He Lei Zhang You Lv Dinglong He |
| author_facet | Zhiya Mu Jun Wang Xin He Zhonghui Wei Jiawei He Lei Zhang You Lv Dinglong He |
| author_sort | Zhiya Mu |
| collection | DOAJ |
| description | Under the dynamic working conditions of a star sensor, motion blur of the star will appear due to its energy dispersion during imaging, leading to the degradation of the star centroid accuracy and attitude accuracy of the star sensor. To address this, a restoration method of a blurred star image for a star sensor under dynamic conditions is presented in this paper. First, a kinematic model of the star centroid and the degradation function of blurred star image under different conditions are analyzed. Then, an improved curvature filtering method based on energy function is proposed to remove the noise and improve the signal-to-noise ratio of the star image. Finally, the Richardson Lucy algorithm is used and the termination condition of the iterative equation is established by using the star centroid coordinates in three consecutive frames of restored images to ensure the restoration effect of the blurred star image and the accuracy of the star centroid coordinates. Under the dynamic condition of 0~4°/s, the proposed algorithm can effectively improve the signal-to-noise ratio of a blurred star image and maintain an error of the star centroid coordinates that is less than 0.1 pixels, which meets the requirement for high centroid accuracy. |
| first_indexed | 2024-04-11T20:57:49Z |
| format | Article |
| id | doaj.art-e2c010b5bcdc4805bf428b4910c48463 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T20:57:49Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e2c010b5bcdc4805bf428b4910c484632022-12-22T04:03:38ZengMDPI AGSensors1424-82202019-09-011919412710.3390/s19194127s19194127Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic ConditionsZhiya Mu0Jun Wang1Xin He2Zhonghui Wei3Jiawei He4Lei Zhang5You Lv6Dinglong He7Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaUnder the dynamic working conditions of a star sensor, motion blur of the star will appear due to its energy dispersion during imaging, leading to the degradation of the star centroid accuracy and attitude accuracy of the star sensor. To address this, a restoration method of a blurred star image for a star sensor under dynamic conditions is presented in this paper. First, a kinematic model of the star centroid and the degradation function of blurred star image under different conditions are analyzed. Then, an improved curvature filtering method based on energy function is proposed to remove the noise and improve the signal-to-noise ratio of the star image. Finally, the Richardson Lucy algorithm is used and the termination condition of the iterative equation is established by using the star centroid coordinates in three consecutive frames of restored images to ensure the restoration effect of the blurred star image and the accuracy of the star centroid coordinates. Under the dynamic condition of 0~4°/s, the proposed algorithm can effectively improve the signal-to-noise ratio of a blurred star image and maintain an error of the star centroid coordinates that is less than 0.1 pixels, which meets the requirement for high centroid accuracy.https://www.mdpi.com/1424-8220/19/19/4127star sensormotion blurcurvature filterimage restoration |
| spellingShingle | Zhiya Mu Jun Wang Xin He Zhonghui Wei Jiawei He Lei Zhang You Lv Dinglong He Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions Sensors star sensor motion blur curvature filter image restoration |
| title | Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions |
| title_full | Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions |
| title_fullStr | Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions |
| title_full_unstemmed | Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions |
| title_short | Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions |
| title_sort | restoration method of a blurred star image for a star sensor under dynamic conditions |
| topic | star sensor motion blur curvature filter image restoration |
| url | https://www.mdpi.com/1424-8220/19/19/4127 |
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