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．
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.
出处
《天文学报》
CSCD
北大核心
1996年第1期85-90,共6页
Acta Astronomica Sinica
