低对比度扩展目标跟踪算法  

TRACKING ALGORITHM FOR LOW CONTRAST EXTENDED OBJECT

作　　者：饶长辉[1] 姜文汉[1] 凌宁[1] Jacques M.Beckers 

机构地区：[1]中国科学院光电技术研究所,成都610209 [2]National Solar Observatory

出　　处：《天文学报》2001年第3期329-338,共10页Acta Astronomica Sinica

基　　金：国家自然科学基金资助 (批准号 :No.1 97893 0 1 )

摘　　要：针对如太阳表面米粒结构和太阳黑子这类低对比度扩展目标 ,研究了互相关因子和绝对差分两种跟踪算法的有效性 ,并给出了根据所采集的图像进行后处理所得到的波前整体倾斜信号 .For the low contrast extended objects such as solar granulation and the sunspot, the effectiveness of the cross-correlation coefficient and the absolute difference algorithms is studied. The tilt signals, which is acquired by post-processing according to the calibrated solar granulation and sunspot image, are presented. Furthermore, the r.m.s. contrasts of the long exposure images of the solar granulation without and with tilt removal are compared.

关 键 词：对比度 扩展目标 互相关因子 绝对差分算法 大气相干长度 太阳黑子 大气湍流 

分 类 号：P182.2[天文地球—天文学]