基于主动照明调制的水下偏振成像方法  

Underwater polarization imaging method based on active illumination modulation

作　　者：董昌吉 张卫红 黄一钊 李绪锦 王洪远 胡浩丰 DONG Changji;ZHANG Weihong;HUANG Yizhao;LI Xujin;WANG Hongyuan;HU Haofeng(Joint Research Centre for Industrialization of Marine Economic Technology,School of Marine Science and Technology,Tianjin University,Tianjin 300072,China;School of Marine Science and Technology,Tianjin University,Tianjin 300072,China;Laoshan Laboratory,Ocean Observation and Exploration Research Department,Qingdao 266237,China;School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument,Tsinghua University,Beijing 100084,China)

机构地区：[1]天津大学海洋科学与技术学院海洋经济技术产业化联合研究中心,天津300072 [2]天津大学海洋科学与技术学院,天津300072 [3]崂山实验室海洋观测与探测研究部,山东青岛266237 [4]天津大学精密仪器与光电子工程学院,天津300072 [5]清华大学精密仪器系精密测试及仪器国家重点实验室,北京100084

出　　处：《应用光学》2024年第6期1189-1196,共8页Journal of Applied Optics

基　　金：国家自然科学基金(62075161,62205243)。

摘　　要：浑浊水体中的光学衰减和吸收效应常常导致成像质量的明显下降,对诸多基于水下视觉图像的应用产生了不可忽视的影响。介绍了一种水下散射抑制的偏振成像方法,其关键思想是通过主动照明调制实现后向散射光偏振程度最大化,从而最大程度地抑制后向散射光。通过目标场景穆勒矩阵的测量、后向散射光的斯托克斯矢量的给定、入射主动照明斯托克斯矢量的确定,以及偏振特征矢量的计算,最终结合这些信息对散射介质中的图像进行复原。实验结果表明,该方法在处理浑浊水体下的成像问题方面表现出色。与其他方法相比,它显著提升了图像质量,为水下环境中的成像应用提供了有力的解决方案。该方法的独特之处在于其主动偏振照明调制技术,通过主动照明控制,实现了后向散射光的偏振特性调控,从而有效地减少了散射引起的成像退化,为水下偏振成像领域带来了新的研究思路。The optical attenuation and absorption effects in turbid water often lead to a significant decrease in imaging quality,which has an undeniable impact on many applications based on underwater visual images.A polarization imaging method for underwater scattering suppression was proposed,the crucial idea of which was to maximize the degree of polarization of backscattered light through active illumination modulation,thus the backscattered light was suppressed to the greatest extent.Through the measurement of the Mueller matrix of the target scene,the given Stokes vector of the backscattered light,the determination of the Stokes vector of the incident active illumination,and the calculation of the polarization feature vectors,the images in the scattering medium were finally recovered by combining above information.Experimental results show that the method performs well in dealing with the imaging problems under turbid water.Compared with other methods,it significantly improves image quality and provides a powerful solution for imaging applications in underwater environments.The uniqueness of this method lies in its active illumination modulation technique,which achieves the modulation of the polarization characteristics of the backscattered light through active illumination control,thereby effectively reducing the imaging degradation caused by scattering,and bringing new research ideas to the field of underwater polarization imaging.

关 键 词：偏振成像 浑浊水成像 主动照明调制 图像复原 

分 类 号：TN201[电子电信—物理电子学] O436.3[机械工程—光学工程]