强激光与粒子束, 2003, 15 (12): 1151, 网络出版: 2006-04-28
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
微弱星体 检测概率 白天 图像处理 信噪比 Faint astronomical objects Detection efficiency Daytime Image processing Signal-to-noise ratio
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.
Abstract
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.
万敏, 苏毅, 杨锐, 郑捷, 冷杰, 郑为民, 胡晓阳. 提高白天观测星体信噪比的方法研究[J]. 强激光与粒子束, 2003, 15(12): 1151. 万敏, 苏毅, 杨锐, 郑捷, 冷杰, 郑为民, 胡晓阳. Improvement of signal to noise ratio in astronomical objects detection in daytime[J]. High Power Laser and Particle Beams, 2003, 15(12): 1151.
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