基于偏振滤波的虚拟潜望镜图像增强方法研究
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摘要
为了降低海水中散射光对虚拟潜望镜成像质量的影响,利用瑞利散射理论分析了菲涅耳窗口光线分布的轴对称偏振特性,提出了一种利用放射性配置偏振镜过滤海水中散射光的方法,并对滤波效果进行了仿真分析。理论分析表明:该滤波方法对于提高海面图像具有较好的效果。
The imaging quality of virtual periscope is greatly influenced by the scattering light in the sea.To reduce the scattering light′s effect,this paper analyses the axis symmetric polarization of Fresnel window based on Rayleigh scattering theory,provides a method to eliminate the scattering light by using radial polarizer,and analyses the effect of polarization filtering by simulation method.The theoretical analysis represents that this method is feasible in sea surface imaging enhancement.
The imaging quality of virtual periscope is greatly influenced by the scattering light in the sea.To reduce the scattering light′s effect,this paper analyses the axis symmetric polarization of Fresnel window based on Rayleigh scattering theory,provides a method to eliminate the scattering light by using radial polarizer,and analyses the effect of polarization filtering by simulation method.The theoretical analysis represents that this method is feasible in sea surface imaging enhancement.
引文
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[9]DUNTLEY S Q.Light in the sea[J].J.Opt.Soc.Am.,1963,53(2):214-233.
[10]GABOR H,DEZSO V.Underwater refractionpolarization patterns of skylight perceived by aquatic animals through snell′s window of the flat water surface[J].Vision Res.,1995,35(12):1651-1699.
[2]陆炳哲,聂辉.从潜艇潜望镜到潜艇成像系统的新概念[J].舰船电子工程,2005,25(1):20-25.LU Bing-zhe,NIE Hui.New concept from submarine periscope to submarine imaging systems[J].Ship Electronic Engineering,2005,25(1):20-25.(in Chinese)
[3]RANDALL E P.Observations from Below a Rough Water Surface to Determine Conditions of or Above the Surface Waves[P].U.S.:5528493,1996-06-18.
[4]SCHULTZ H,EMMANUEL A C.System and Method for Imaging Through an Irregular Water Surface[P].U.S.:7630077B2,2009-12-08.
[5]李飞,黄亮.水下对空成像的光学计算模型[J].光学与光电技术,2008,8(4):63-67.LI Fei,HUANG Liang.Computer model for optical simulation of through-surface underwater imaging[J].Optics&Optoelectronic Technology,2008,8(4):63-67.(in Chinese)
[6]孙传东,陈良益,高立民,等.水的光学特性及其对水下成像的影响[J].应用光学,2000,21(4):39-46.SUN Chuan-dong,CHEN Liang-yi,GAO Li-min,et al.Water optical properties and their effect on underwater imaging[J].Applied Optic,2000,21(4):39-46.(in Chinese)
[7]王猛,白洪亮.同态滤波器在水下图像对比度增强中的应用[J].应用科技,2003,30(7):15-17.WANG Meng,BAI Hong-liang.Underwater image contrast enhancement by homomorphic filtering[J].Applied Science and Technology,2003,30(7):15-17.(in Chinese)
[8]于亦凡,丁田夫.水下模糊图象维纳滤波和卡尔曼滤波恢复算法研究[J].青岛海洋大学学报,2002,32(3):482-488.YU Yi-fan,DING Tian-fu.Research of image restoration in seawater unsing Wiener and Kalman filter[J].Journal of Ocean University of Qingdao,2002,32(3):482-488.(in Chinese)
[9]DUNTLEY S Q.Light in the sea[J].J.Opt.Soc.Am.,1963,53(2):214-233.
[10]GABOR H,DEZSO V.Underwater refractionpolarization patterns of skylight perceived by aquatic animals through snell′s window of the flat water surface[J].Vision Res.,1995,35(12):1651-1699.