摘要
天文观测得到的CCD图像,不仅反映出天体的位置及亮度分布,至少还包含了天光背景的贡献.天光背景可以分为连续天光背景分布以及天空发射线造成的干涉条纹分布.上述分布都线性地叠加在一起.本文提出了对这样一幅图像中天光背景的"除法处理".这种处理方法可以减少天光背景测量误差对天体光度测量、特别是对暗天体测量的影响.
In general, image processing runs in a standard way. Sky background, including continuum and fringe, should be Subtracted from each CCD image. We can call this method be 'subtraction' processing. Concerning measurement errors transmited from all preliminary image processing, a new 'division' processing is suggested in this paper. It is more easy to do, and can give more accurate brightness measurement especially for faint celestial bodies.
出处
《天文学报》
CSCD
北大核心
1990年第2期181-186,共6页
Acta Astronomica Sinica
关键词
图像
处理
天光背景
除法
image orocessing—sky background—division processing
