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Journal of ZheJiang University (Engineering Science)  2021, Vol. 55 Issue (12): 2382-2389    DOI: 10.3785/j.issn.1008-973X.2021.12.019
Overhead transmission line detection based on multiple linear-feature enhanced detector
Xue-yun CHEN1(),Jin XIA1,Ke DU1,2
1. School of Electrical Engineering, Guangxi University, Nanning 530004, China
2. Nanning Power Supply Station ofGuangxi Power Grid Corporation, Nanning 530000, China
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A multiple linear-feature enhanced detector (MLED) was proposed with the enhanced linear feature extraction from complicated background and the reduction of break-point rate capabilities, aiming at the problems of low power line detection accuracy and high break-point rate, which were caused by complex environmental background and low power line pixel ratio in the visible light image of overhead transmission lines. Firstly, several pairs of the trunk features and edge features were extracted from image by the dual-path residual framework. And then, through the multi-feature fusion module, the in-depth integration of backbone, edge and high-level features at different scale levels were realized. Eventually, the prediction result was obtained. Especially, multiple operations were embedded in the multi-feature fusion module including residual connection, up convolution and multi-scale coalescence. Experimental results showed that the ability of MLED was significantly improved while comparing with PSPNet, FCRN and UNet. The multi-feature fusion module was superior to traditional residual module. The F Measure and Mean IoU scores of the visualization results was 78.4% and 77.8% respectively, and the break-point rate was 30.8%.

Key wordsoverhead transmission lines detection      complicated background      multi-linear-feature fusion      multi-scale-feature loss      multiple linear-feature enhanced detector (MLED)     
Received: 27 January 2021      Published: 31 December 2021
CLC:  TP 391.4  
Fund:  国家自然科学基金资助项目(62061002)
Cite this article:

Xue-yun CHEN,Jin XIA,Ke DU. Overhead transmission line detection based on multiple linear-feature enhanced detector. Journal of ZheJiang University (Engineering Science), 2021, 55(12): 2382-2389.

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针对架空输电线可见光图像中环境背景复杂、电力线像素占比小,导致电力线检测精度低、断点率高的问题,提出具有强化线型特征提取和减少断点能力的多线型特征增强网络(MLED). 利用双路残差框架提取线型电力线目标的主干和边缘特征,通过多特征融合模块,在不同尺度的层次上实现主干、边缘和高层特征的深度整合,输出检测结果. 在多特征融合模块中嵌入残差、反卷积、多尺度结合等多路运算. 实验结果表明,MLED的检测能力较PSPNet、FCRN、UNet 有明显提高,多特征融合模块优于传统的残差连接块,可视化结果的 F 检验(F-Measure)、IoU 平均值(Mean IoU)分别为78.4%、77.8%,断点率为30.8%.

关键词: 架空输电线检测,  复杂背景,  多线型特征融合,  多尺度特征损失,  多线型特征增强网络(MLED) 
Fig.1 Structure chart of multiple linear-feature enhanced detector
Fig.2 Three kinds of multi-feature fusion modules
Fig.3 Comparative experiment results between MLED and mainstream networks
Fig.4 Precision-recall curves of comparison experiments
网络 $ \mathrm{F}\mathrm{M} $ $ {M}_{\mathrm{I}\mathrm{o}\mathrm{U}} $ $ \mathrm{B}\mathrm{P}\mathrm{R} $ $ \mathrm{F}\mathrm{P}\mathrm{S} $
PSPNet 0.134 0.386 0.972 8.8
FCRN 0.703 0.651 0.442 17.2
UNet 0.734 0.679 0.399 11.9
0.784 0.778 0.308 13.55
Tab.1 Evaluation metrics and FPS of each network prediction results
Fig.5 Ablation experiment results of MLED
Fig.6 Precision-recall curves of ablation experiments
网络 $ \mathrm{F}\mathrm{M} $ $ {M}_{\mathrm{I}\mathrm{o}\mathrm{U}} $ $ \mathrm{B}\mathrm{P}\mathrm{R} $
UNet 0.734 0.679 0.399
FU_Lf 0.754 0.728 0.343
MLED_Lf 0.751 0.742 0.317
MLED_A 0.762 0.758 0.313
MLED_B 0.776 0.771 0.311
MLED_C 0.784 0.778 0.308
Tab.2 Metrics of each network of ablation experiments
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