| 低信噪比下星光点目标的检测 |
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| 引用本文： | 李青,田国昌,汪建业.低信噪比下星光点目标的检测[J].大气与环境光学学报,2008,3(1):77-80. |
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| 作者姓名： | 李青 田国昌 汪建业 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所,安徽,合肥,230031 |
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| 摘 要： | 大气相干长度仪作为测量大气参数的仪器,白天用太阳边缘(夜晚利用恒星)成像在CCD上,利用到达角起伏法测量大气参数.在昼夜交替阶段,肉眼看不到星光而太阳高度角不在可测范围而无法测量.为进行此时间段连续测量,首先要实现低信噪比下星光点目标的检测.在选用合适红外滤波片和高灵敏度CCD的基础上,对采集到的图像进行帧累加和局部增强等处理方法,较好地完成了目标的检测.
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| 关 键 词： | 红外图像处理 红外目标检测 帧累加 局部增强 低信噪比 点目标 检测 Ratio Noise Signal Target 处理方法 增强 局部 帧累加 图像 高灵敏度 滤波片 红外 连续测量 时间段 范围 太阳高度角 肉眼 |
| 文章编号： | 1673-6141（2008）01-0077-04 |
| 收稿时间： | 2007-03-30 |
| 修稿时间： | 2007-08-31 |
Detecting Star Target in Low Signal Noise Ratio |
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| LI Qing,Tian Guo-chang,Wang Jian-ye.Detecting Star Target in Low Signal Noise Ratio[J].Journal of Atmospheric and Environmental Optics,2008,3(1):77-80. |
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| Authors: | LI Qing Tian Guo-chang Wang Jian-ye |
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| Affiliation: | LI Qing Tian Guo-chang Wang Jian-ye (Anhui Institute of Optics , Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China) |
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| Abstract: | Atmospheric coherent length instrument measures parameters with edge of sun in daylight or star at night with fluctuant arrival-angle.But it can't work at the period of day and night alternating when stars can't be observed with eyes and quadrant elevation of sun is unfit for measuring,so image processing with low signal-to-noise ratio is necessary using suitable infrared filter and high-sensitive CCD while observing star in daylight.The experiment proves that little target can be detected well with frame a... |
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| Keywords: | infrared image processing infrared target detection frame accumulation local enhancement |
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