街景影像交通标志牌限速限高信息提取  

Road speed limit and height limit information extraction from traffic sign in street view images

作　　者：季辰 刘磊[1] 蔡栋[3,4] 程亮 JI Chen;LIU Lei;CAI Dong;CHENG Liang(School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China;Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Nanjing 210023,China;Jiangsu Police Institute,Nanjing 210031,China;Key Laboratory of Police Geographic Information Technology,Ministry of Public Security,Nanjing 210031,China)

机构地区：[1]南京大学地理与海洋科学学院,江苏南京210023 [2]江苏省地理信息技术重点实验室,江苏南京210023 [3]江苏警官学院,江苏南京210031 [4]警用地理信息技术公安部重点实验室,江苏南京210031

出　　处：《测绘通报》2025年第4期39-44,共6页Bulletin of Surveying and Mapping

基　　金：天基综合信息系统重点实验室基金(HLJGXQ20220916032);国家自然科学基金(42401548)。

摘　　要：针对端到端识别模型对样本稀疏交通标志牌识别效果差的问题,本文构建了一种在街景影像中先检测交通标志牌,再提取限速限高语义信息的方法,以实现对标志牌所在道路限速限高属性的更新。首先,融合公开样本数据集,训练基于4种典型网络的检测模型,对比选用效果最佳的Faster R-CNN作为标志牌检测模型;然后,分割全景街景影像,在子图像中检测限速限高标志牌;最后,引入PP-OCRv3文字识别模型提取限速限高值,并通过语义约束清洗结果。结合交通运输部门公开数据,对本文方法进行测试,并在中国台湾省台南市开展应用试验。结果表明,该方法适用于样本稀疏的限速限高标志牌,能从街景影像中准确提取限速限高信息,对交通标志牌管理和限速限高道路属性校验更新具有应用价值。Aiming at the problem that the end-to-end detection model has poor effect on few-shot sample traffic signs,this paper constructs a method to firstly detect traffic signs in street view images and then extract the semantic information,as to update the speed limit and height limit attributes of the road where the sign is located.Firstly,the public sample dataset is integrated to train the detection model based on four typical networks.After comparison,the best Faster R-CNN is selected as the sign detection model.Then,the panoramic street view image is segmented to detect the speed limit and height limit signs in the sub-image.Finally,the PP-OCRv3 text detection model is combined to extract the speed limit and height limit values,and the results are cleaned by semantic constraints.The method in this paper is verified by using the public data of the transportation department,and the application experiment is carried out in Tainan city,Taiwan,China.The results show that this method is suitable for few-shotsample traffic signs,which can accurately extract speed limit and height limit information from street view images,and has application value in traffic sign management and speed limit and height limit road attribute verification and update.

关 键 词：道路限速 道路限高 交通标志牌 目标检测 信息提取 街景影像 

分 类 号：P237[天文地球—摄影测量与遥感]