偏振通道的选择对红外偏振成像质量的影响  

Quality of infrared polarization imaging related to the selection of polarization channels

作　　者：张嘉旻 毛玮韵 肖嵘 司文荣 卞云逸 郝佳 周俊焯 虞益挺 ZHANG Jiamin;MAO Weiyun;XIAO Rong;SI Wenrong;BIAN Yunyi;HAO Jia;ZHOU Junzhuo;YU Yiting(State Grid Shanghai Electric Power Research Institute,Shanghai 200437;Key Laboratory of Scale Manufacturing Technologies for High-Performance MEMS Chips of Zhejiang Province,Key Laboratory of Optical Microsystems and Application Techbnologies of Ningbo City,Ningbo Institute of Northwestern Polytechnical University,Ningbo 315103;Key Laboratory of Micro/Nano Systems for Aerospace(Ministry of Education),Key Laboratory of Micro and Nano Electro-Mechanical Systems of Shaanxi Province,School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]国网上海市电力公司电力科学研究院,上海200437 [2]浙江省高性能M EM S芯片规模制造技术重点实验室,宁波市光学微系统及应用技术重点实验室,西北工业大学宁波研究院,浙江宁波315103 [3]空天微纳系统教育部重点实验室,陕西省微纳机电系统重点实验室,西北工业大学机电学院,陕西西安710072

出　　处：《光学精密工程》2025年第2期184-193,共10页Optics and Precision Engineering

基　　金：国家电网有限公司科技项目资助(No.52094023003B)。

摘　　要：为了提升电力设备缺陷检测的准确性与效率,搭建了一个分时型红外偏振成像系统,组合了长波红外探测器及偏振片。针对输电线路,通过控制偏振片旋转实现多通道图像采集。然后,分别利用均方根误差(RMSE)、峰值信噪比(PSNR)和平均结构相似度(MSSIM)三个参数对不同偏振通道数以及不同偏振角度间隔的偏振特征参量图像进行评价。实验结果表明:随着通道数从3通道增加到18通道,偏振特征参量图像质量逐步提升,尤其在4通道到9通道的范围内,图像质量的提升最为显著。然而,进一步增加通道数对图像质量并未造成明显的影响,导致了冗余计算;对于3通道偏振特征参量图像,小角度间隔能够捕捉到细小目标的细节信息,而大角度间隔能够有效分离目标与背景,并减少噪声干扰,均有适合的应用场景。该实验结果对红外偏振成像的偏振通道数选择策略具有指导意义。In order to improve the accuracy and efficiency of defect detection in power equipments,a time-division infrared polarization imaging system is constructed,combining a long-wave infrared detector and a polarizer.For electric transmission lines,multi-channel image acquisition is realized by controlling the polarizer rotation.Then,the polarization images with different channel numbers and different polarization angle intervals are evaluated using three parameters,i.e.root mean square error(RMSE),peak signal-to-noise ratio(PSNR)and mean structural similarity(MSSIM),respectively.The experimental results show that as the number of channels increases from 3 to 18,the image quality is gradually improved,especially in the range of 4 to 9 channels,where the improvement of imaging quality is most significant.However,further increasing the number of channels does not have a significant effect on the image quality,which leads to redundant calculations;for 3-channel polarization images,small angular intervals are able to capture the detailed information of fine targets,while large angular intervals are able to effectively separate the target from the background and reduce the noise interference,which are both suitable for some specific application scenarios.The experimental results are instructive for the polarization channel selection strategy of infrared polarization imaging.

关 键 词：电力巡检 长波红外 分时型偏振成像系统 偏振通道 斯托克斯矢量 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN219[自动化与计算机技术—计算机科学与技术]