基于无免靶区域的水下偏振去散射成像  

Underwater polarization de-scattering imaging independent of target-free region

作　　者：朱叶青 王星[2] 朱竹青 ZHU Yeqing;WANG Xing;ZHU Zhuqing(School of Information Engineering,Taizhou College of Nanjing Normal University,Taizhou 225300,China;School of Computer and Electronic Information,Nanjing Normal University,Nanjing 210023,China;State Key Laboratory of Applied Optics,Changchun Institute of Optical Precision Machinery and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]南京师范大学泰州学院信息工程学院,泰州225300 [2]南京师范大学计算机与电子信息学院,南京210023 [3]中国科学院长春光学精密机械与物理研究所,应用光学国家重点实验室,长春130033

出　　处：《物理学报》2025年第4期95-102,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12174196);中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室(批准号:SKLAO2022001A17)资助的课题.

摘　　要：偏振成像技术在去除后向散射光方面是有效的.针对该技术依赖免靶区域以计算后向散射光信息限制其适用范围和实时成像能力的问题,本文提出了无免靶区域的偏振成像方法.该方法结合主动偏振成像和透射率去散射模型,将相机接收到的图像分解为具有偏振信息和无偏振信息的部分,具有偏振信息的部分采用主动成像模型计算,而无偏振信息的部分基于Stokes矢量计算.同时,结合透射率校正原理实现去散射.实验和真实世界水下成像结果表明,本文方法能够有效去除大部分后向散射光,且具有速率优势,能够助力实时复杂条件下的水下成像技术,在海底资源探测与研究等领域具有广阔的应用前景.Underwater optical imaging technology possesses broad application prospects in fields such as marine resource exploration,underwater ecological environment monitoring,and seabed topography detection.The technology employs the polarization characteristics of light,particularly those of the background and target,to achieve a clear image.However,the traditional methods rely on target-free regions to compute the backscattered light information,which is infrequently present in the actual scene captured by the camera.Then the full-space resolution of target information light and backscattered light information are required.At this time,the traditional methods may be difficult to adapt in practical application.In this work,an underwater polarization de-scattering method independent of target-free regions is proposed by combining active polarization imaging and transmittance de-scattering model.Initially,the total light intensity within the camera’s field of view is decomposed into its polarized and unpolarized components.By removing the backscattered light with polarized and unpolarized information from the total light intensity,a clear underwater target can be obtained.Based on the active polarization imaging model,the backscattered light with polarization information is calculated,in which the polarization angle of the backscattered light is considered to be zero in the full-space.Thus,the polarization degree of the target information light occupying the camera’s entire field of view can be derived.According to the polarization correlation,the polarization degree of the backscattered light can be characterized,and the intensity of the backscattered light with polarization information in the camera’s entire field of view can also be obtained.Then the unpolarized component is calculated using the minimum intensity image with Stokes vector transformation.Finally,the underwater scene is obtained by combining the transmittance de-scattering principle and introducing adjustment parameters.Experimental and real-world u

关 键 词：免靶区域 水下偏振成像 去散射 透射率校正 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O436.3[自动化与计算机技术—计算机科学与技术]