提高白天观测星体信噪比的方法研究  

Improvement of signal to noise ratio in astronomical objects detection in daytime

作　　者：万敏[1] 苏毅[1] 杨锐[1] 郑捷[1] 冷杰[1] 郑为民[1] 胡晓阳[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2003年第12期1151-1154,共4页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题

摘　　要：　为提高对天体目标的检测概率,对多种可提高探测器检测概率的途径进行了研究。研究结果表明:光谱滤波技术能有效提高信噪比。为得到大的探测对比度和信噪比,需合理选取探测系统视场,应保证目标像所占像素个数不小于2×2;还应令系统在不加衰减器的情况下,电荷耦合器件(CCD)接近饱和并保证CCD不饱和。结合探测系统视场的选取,利用形态学方法对图像进行处理,将大大提高探测信噪比,从而大大提高检测概率。Detection for a faint astronomical object in daytime is an extremely complex issue because of low target-background-contrast and low signal-to-noise ratio. Some ways to improve the detection probability is studied in this paper. The results show, spectral filtering technology is an effective way to improve signal-to-noise ratio. The reasonable choice of field of view is helpful to get higher signal-to-noise ratio and contrast. With the reasonable choice of field of view and the effective application of morphology-based detection algorithm, the detection efficiency could be greatly improved.

关 键 词：微弱星体 检测概率 白天 图像处理 信噪比 

分 类 号：O43[机械工程—光学工程]