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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >A Sub-pixel Centroid Algorithm for Star Image Based on Gaussian Distribution
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A Sub-pixel Centroid Algorithm for Star Image Based on Gaussian Distribution

机译：基于高斯分布的星图亚像素质心算法

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摘要

A novel centroid algorithm is proposed to acquire better centroid performance in a star image. Since photons incident on pixels of stars present a Gaussian point spread function (PSF), so, the centroid locations on the x and y-axis are calculated using the pixel intensity ratio and expand the Gaussian PSF to polynomials with respect to the centroid location. The angular separation error between star pairs is used to verify the proposed algorithm indirectly. The result clearly shows that the centroid accuracy achieves 1/33 of a pixel and is about two times better than the moment method, indicating the new algorithm is effective.
机译：提出了一种新颖的质心算法，以在星形图像中获得更好的质心性能。由于入射在恒星像素上的光子具有高斯点扩展函数（PSF），因此，使用像素强度比可以计算x和y轴上的质心位置，并将高斯PSF扩展到相对于质心位置的多项式。星对之间的角分离误差用于间接验证所提出的算法。结果清楚地表明，质心精度达到了一个像素的1/33，比矩量法提高了约两倍，表明该算法是有效的。

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  • 来源
  • 作者

    Jing Sun; Guangrui Li; Desheng Wen; Bin Xue; Shaodong Yang;

  • 作者单位

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China,Graduate University of Chinese Academy of Sciences, Beijing, China;

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China,Shaanxi Institute of Education, Xi'an, China;

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China;

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China;

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China,Graduate University of Chinese Academy of Sciences, Beijing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    sub-pixel centroid algorithm; gaussian PSF; star image processing; CCD camera;

    机译：亚像素质心算法;高斯PSF;星图处理;CCD相机;

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