Research on compensation method for starlight emission accuracy based on star point focal length traversal

Yun, Zhikun; Zhang, Jian; Zhang, Yu; Ren, Taiyang; Chen, Siwen; Zhao, Bin; Zhang, Jierui; Lin, Guanyu; Zhang, Guoyu

doi:10.1016/j.optcom.2024.130664

Optics Communications

2024

DOI: 10.1016/j.optcom.2024.130664

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Research on compensation method for starlight emission accuracy based on star point focal length traversal

Zhikun Yun,

Jian Zhang,

Yu Zhang

et al.

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2024

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Grayscale Iterative Star Spot Extraction Algorithm Based on Image Entropy

Zhao,

Liao,

Zhang

et al. 2024

Applied Sciences

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Star trackers are susceptible to interference from stray light, such as sunlight, moonlight, and Earth atmosphere light, in the space environment, resulting in an overall improvement in the star image grayscale, poor background uniformity, low star extraction rate, and high number of false star spots. In response to these challenges, this paper proposes a grayscale iterative star spot extraction algorithm based on image entropy. The implementation of the algorithm is mainly divided into two steps: (1) The algorithm conducts multiple grayscale iterations, effectively utilizing the prior information on the local contrast of star spots to filter out stray light backgrounds to a certain extent. (2) By establishing an inner–outer template, the image entropy algorithm is employed to obtain the real star targets to be extracted, which further suppresses the background clutter and noise. Numerical simulations and experimental results demonstrate that, compared to traditional detection algorithms, this algorithm can effectively suppress background stray light, enhance star extraction rates, and reduce the number of false star spots, and it exhibits superior detection performance in complex backgrounds across various scenarios.

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Grayscale Iterative Star Spot Extraction Algorithm Based on Image Entropy

Zhao,

Liao,

Zhang

et al. 2024

Applied Sciences

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show abstract

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Research on compensation method for starlight emission accuracy based on star point focal length traversal

Cited by 1 publication

References 12 publications

Grayscale Iterative Star Spot Extraction Algorithm Based on Image Entropy

Grayscale Iterative Star Spot Extraction Algorithm Based on Image Entropy

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