文章摘要
孟颖,吴宏涛,贾磊,刘晓.基于监控视频的公路能见度检测方法[J].交通运输研究,2019,5(1):65-72.
基于监控视频的公路能见度检测方法
Highway Visibility Detection Method Based on Surveillance Video
  
DOI:
中文关键词: 交通工程;能见度检测;暗原色先验  透射率;大气光值
英文关键词: traffic engineering  visibility detection  dark channel prior  transmittance  atmospheric light
基金项目:国家自然科学基金项目(51705299);山西省科技厅项目(201801D221047);山西交控集团科技项目(18-JKKJ-02);山西省青年拔尖人才支持计划
作者单位
孟颖 山西省交通科学研究院 
吴宏涛 山西省交通科学研究院 
贾磊 山西省交通科学研究院 
刘晓 山西省交通科学研究院 
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中文摘要:
      雾霾、沙尘等低能见度天气状况的频繁发生,严重影响到日常交通管理及出行者的生命、财产安全。针对低能见度环境下极易发生公路交通事故的问题,提出一种利用公路沿线已经架设的监控设备对各路段的监控视频数据进行实时图像处理分析的公路能见度检测方法。该方法是在传统暗原色先验算法的基础上,将监控视频帧转换为灰度图像,并结合自适应导向滤波算法和四叉树图像分割算法,提取监控图像所包含的空气透射率及大气光值等特征参数。然后基于能见度计算模型,依据监控设备与检测目标物之间的实际距离及偏移角度,估测道路的能见距离。实验结果表明,优化后的图像处理方法可以解决图像清晰度低、色彩失真、场景适应能力差等问题,且检测的能见度值误差率满足我国公路能见度检测精度要求。最后,结合能见度检测方法,提出了相应的能见度预警策略并应用于公路能见度检测与预警系统,为驾驶员实时提供雾区路段的能见度值信息和预警建议。
英文摘要:
      Low-visibility weathers, such as smog and sand storm, were causing tremendous risks to road traffic and travel, seriously affecting the daily traffic management and the safety of life and property of travelers. Aiming at the problem that highway was prone to traffic accidents in low visibility environment, a highway visibility detection method was proposed based on real-time image processing and analysis of monitoring video data of each section using monitoring equipment installed along the highway. Based on the traditional dark channel prior, the highway visibility detection method converted the surveillance video frame into gray image, and extracted the air transmittance and atmospheric light value contained in the surveillance image by the adaptive steering filter algorithm and quad tree image segmentation algorithm. Then based on the visibility calculation model, the visibility distance of the road was estimated according to the actual distance and offset angle between the monitoring equipment and the detection object. The experimental results showed that the optimized image processing method could solve the problems of low image clarity, color distortion, and poor scene adaptability. The detection of visibility error rate meets the accuracy requirements of highway visibility detection in China. Finally, based on the visibility detection method, the corresponding visibility warning strategies were applied in a road visibility detection and early warning system to provide the driver with realtime visibility values and warning recommendations for the fog areas.
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