复杂背景中输电线路不均匀覆冰厚度测量方法  

Measurement method for thickness of uneven icing on transmission line in complex background

作　　者：贺晓倩 吴先用[1,2] 魏业文[1,2] HE Xiaoqian;WU Xianyong;WEI Yewen(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]三峡大学湖北省输电线路工程技术研究中心,湖北宜昌443002

出　　处：《电力科学与技术学报》2023年第3期224-229,共6页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金青年科学基金(52107108);湖北省输电线路工程技术研究中心开放课题(2019KXL06);湖北省重点研发计划(2020BAB110)。

摘　　要：为提高输电线路覆冰厚度测量精度,提出一种复杂背景图像中输电线路不均匀覆冰厚度测量的新方法。首先,采用图像灰度化、中值滤波去噪及最大类间方差图像分割法对输电线路覆冰图像进行预处理;然后,结合输电线路覆冰信息和背景噪声的连通域特征,提取复杂背景下覆冰输电线路轮廓;最后,针对局部覆冰厚度不均匀的现象,采用一种垂线逼近的方法获取输电线路的覆冰厚度。实验结果表明,采用连通域参数特征的输电线路目标提取方法可在背景复杂、对比度低的图像中准确提取覆冰输电线路轮廓。对于局部覆冰不均匀的区域,垂线逼近方法明显优于传统的霍夫变换方法,可以显著提高输电线路覆冰厚度测量精度。To enhance the measurement accuracy of icing thickness on transmission lines,a novel method for measuring the thickness of uneven icing on transmission lines in complex background images was proposed.Firstly,a series of preprocessing steps,including image grizzling,median filter denoising,and maximum inter-class variance method,were applied to the transmission line icing images.Subsequently,by leveraging the connected domain characteristics of transmission line icing information and background noise,the contour of the icing transmission line was extracted from the complex background.Finally,to address the issue of local uneven icing thickness,a vertical approximation method was employed to obtain the pixel width of icing transmission lines.The experimental results demonstrate that the proposed transmission line target extraction method,based on the parameter features of connected domain,can accurately extract the icing transmission line contour from images with complex backgrounds and low contrast.Moreover,the vertical line approximation method is obviously superior to the traditional Hough transform method in areas with local uneven icing,significantly improving the measurement accuracy of icing thickness on transmission lines.

关 键 词：输电线路 覆冰厚度 连通域 图像处理 

分 类 号：TM755[电气工程—电力系统及自动化]