State Grid Hunan Electric Power Corporation Limited Research Institute Changsha 410007 China;
State Grid Hunan Electric Power Corporation Limited Research Institute Changsha 410007 China;
State Grid Hunan Electric Power Corporation Limited Changsha 410007 China;
State Grid Hunan Electric Power Corporation Limited Research Institute Changsha 410007 China;
School of Optical and Electronics Information Huazhong University of Science and Technology Wuhan 430074 China;
machine vision; text detection; optical character recognition(OCR); deep learning;