| 提高白天观测星体信噪比的方法研究 |
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| 引用本文： | 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):1151-1154. |
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| 作者姓名： | 万敏 苏毅 杨锐 郑捷 冷杰 郑为民 胡晓阳 |
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| 作者单位： | 中国工程物理研究院 应用电子学研究所，四川 绵阳 621900 |
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| 基金项目： | 国家863计划项目资助课题 |
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| 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。
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| 关 键 词： | 微弱星体 检测概率 白天 图像处理 信噪比 |
| 文章编号： | 1001-4322(2003)12-1151-04 |
| 收稿时间： | 2003/5/6 |
| 修稿时间： | 2003年5月6日 |
Improvement of signal to noise ratio in astronomical objects detection in daytime |
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| WAN Min,SU Yi,YANG Rui,ZHENG Jie,LENG Jie,ZHENG Wei-min,HU Xiao-yang.Improvement of signal to noise ratio in astronomical objects detection in daytime[J].High Power Laser and Particle Beams,2003,15(12):1151-1154. |
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| Authors: | WAN Min SU Yi YANG Rui ZHENG Jie LENG Jie ZHENG Wei-min HU Xiao-yang |
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| Institution: | Institute of Applied Electronics, CAEP, P.O.Box 919 1012, Mianyang 621900, China |
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| 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. |
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| Keywords: | Faint astronomical objects Detection efficiency Daytime Image processing Signal-to-noise ratio |
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