| CCD图像的二维修正矩定心方法 |
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| 引用本文： | 季凯帆,王锋.CCD图像的二维修正矩定心方法[J].天文学报,1996,37(1):85-90. |
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| 作者姓名： | 季凯帆 王锋 |
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| 作者单位： | 中国科学院云南天文台 |
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| 摘 要： | 对于天体测量而言，ＣＣＤ图像的数字星像处理方法是十分重要的．本文根据ＣＣＤ器件的特性，从理论上推导了二维修正矩算法的最佳门限取值方法．通过处理模拟和实测数据，与传统的二维高斯拟合法比较，在保持矩方法简便特性的同时，在精度上亦有所提高，对于暗星效果更为明显．
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| 关 键 词： | CCD，定心方法 |
TWO-DIMENSIONAL MODIFIED MOMENT CENTERING ALGORITHM IN CCD IMAGES |
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| Ji Kai-fan, Wan Feng.TWO-DIMENSIONAL MODIFIED MOMENT CENTERING ALGORITHM IN CCD IMAGES[J].Acta Astronomica Sinica,1996,37(1):85-90. |
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| Authors: | Ji Kai-fan Wan Feng |
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| Abstract: | Digital centering algorithms are important in astrometry. According to the physical mechanism of CCD and the principle of modified moment algorithm, we propose a new algorithm named two-dimensional modified moment, and derive its best threshold lever in this paper. After using the data both from observation and analog, and comparing with the centering algorithm of two-dimensional gaussianfit, it is effectire on processing speed and accuracy, especially for the low S/N images. |
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| Keywords: | CCD Centering algorithm |
| 本文献已被 CNKI 维普 等数据库收录！ |
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