散射介质中偏振图像模拟方法及应用  

Simulation method of polarization imaging in the scattering medium and its applications

作　　者：胡浩丰[1,2,3] 李天赐 申凌皓 HU Haofeng;LI Tianci;SHEN Linghao(School of Future Technology,Tianjin University,Tianjin 300072,China;School of Marine Science and Technology,Tianjin University,Tianjin 300072,China;School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学未来技术学院,天津300072 [2]天津大学海洋科学与技术学院,天津300072 [3]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《陕西师范大学学报（自然科学版）》2024年第6期1-11,共11页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(62075161)。

摘　　要：散射介质中的可见光偏振模拟数据集较为匮乏,这限制了开发和验证散射介质中偏振成像算法。针对此问题,分析了散射环境中的散射退化、光照等对偏振成像的影响,提出了一种散射介质中偏振图像模拟方法。首先采用物理渲染器精确模拟光的传播路径,得到经偏振滤波片的无退化偏振图像;之后利用真实散射环境数据集(水下及雾天环境),计算不同环境下的散射退化参数;最后结合散射退化模型得到不同偏振态下的模拟散射退化图像。结果表明:模拟数据集准确反映真实散射环境中的图像特征,偏振度和偏振角图像有效呈现了真实散射环境中的退偏现象。相应的模拟偏振图像为分析散射介质中目标和背景的偏振特性提供了可靠基础,也为改进偏振去散射算法提供依据。The visible optical polarization simulation data set in the scattering medium is relatively scarce,which limits the polarization imaging algorithm in the development and verification for the scattering medium.By considering the effects of scattering degeneration and light in the scattered environment on polarizing imaging,a polarizing image simulation method in the scattered medium is proposed.First,the physical render is used to simulate the propagation path of light and obtain the non-degraded polarization images through the polarized filter.After that,the real scattering environment data set(underwater and foggy environment)was used to determine the scattering degradation parameters in different environments.These parameters are then integrated with the scattering degradation model to generate simulated scattering polarization images.The simulation results closely match the image in real scattering environments.The DoLP(degree of linear polarization)images and AoP(angle of polarization)images reflect the phenomenon of depolarization in real scattering environments.Simulating polarization images can be used to analyze the polarization properties of the object and background in the scattered medium,and can provide a solid foundation for improving various polarized scattering algorithms.

关 键 词：偏振成像 偏振图像数据集 散射介质 散射退化模型 

分 类 号：O439[机械工程—光学工程] TP751.2[理学—光学]