| 空间激光成像跟踪系统中的图像噪声抑制技术 |
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| 引用本文： | 董吉辉,胡企铨,孙东松.空间激光成像跟踪系统中的图像噪声抑制技术[J].中国激光,2011(1). |
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| 作者姓名： | 董吉辉 胡企铨 孙东松 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室;中国科学院上海光学精密机械研究所; |
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| 摘 要： | 激光成像跟踪系统是实现空间远距离暗目标跟踪的一种极具潜力的手段,而目标在激光照射下的图像将受到激光散斑的调制作用,影响目标的识别及目标的定向精度。对激光照射下的目标图像的统计特性进行了理论分析,提出了一种对原始图像依次实施灰度线性变换、中值滤波和Lee滤波的组合数值滤波器对图像噪声进行抑制。处理的结果表明,采用上述组合方法,图像的噪声指数可从0.67降至0.22,同时边缘保持度可达0.96,为后续的图像处理提供了必要的条件。
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| 关 键 词： | 图像处理 噪声抑制 组合数值滤波器 激光散斑 |
Techniques of Depressing Image Noise in Laser Imaging Tracking System |
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| Dong Jihui, Hu Qiquan Sun Dongsong.Techniques of Depressing Image Noise in Laser Imaging Tracking System[J].Chinese Journal of Lasers,2011(1). |
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| Authors: | Dong Jihui Hu Qiquan Sun Dongsong |
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| Affiliation: | Dong Jihui1,2 Hu Qiquan2 Sun Dongsong1(1Key Laboratory of Atmospheric and Optical Radiation,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China2Shanghai Institute of Optics and Fine Mechanics,Shanghai 201800,China) |
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| Abstract: | Laser imaging tracking system is a potential way of tracking dark target in distance especially in space,but target image under the illumination of laser is modulated by the laser speckle and it will affect the identification and orient precision of target.Analysis of the statistical characteristic of laser imaging is given,then a combined numerical filter that utilize gray level linear transformation,median filtering and Lee filtering acting on the original image in turn is provided to reduce the image noi... |
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| Keywords: | image processing noise depression combined numerical filter laser speckle |
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