Research on Night Visibility Estimation Method Based on Image Features of Dual Light Sources
DAI Pang-da1, ZHANG Yu-jun1*, LU Chang-hua2, ZHOU Yi1, LIU Jing1, XIAO Xue1，LIU Wen-qing1, WANG Jing-li3
1. Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China 2. Hefei University of Technology, Hefei 230009，China 3. Institute of Urban Meteorology, CMA, Beijing 100089, China
Abstract：Haze, rain and snow bring a lot of inconvenience in our daily life, especially produce serious potential safety hazard for night transport. In the present paper the authors propose the vision-based dual light sources visibility method to estimate night visibility. This method is significantly advantaged with wide range, high precision and low cost, and has a good robustness in many kinds of weather conditions. Firstly, the authors give the basic visibility estimation model under the atmosphere multiple scattering theory. Secondly, the authors propose the dual light sources method to remove the luminance fluctuations of light sources and the atmosphere light effect, and formulize the algorithm to accurately gain information of light sources from the dual light sources image. At last, the authors design the dual light sources system and conduct a long time experiments under various atmosphere conditions. The experiments show that, with the baseline of 35 m, the visibility range is up to 15 000 m, and relative error is below 20%. This method and system can satisfy the demand of meteorological department and transport agency.
戴庞达1，张玉钧1*，鲁昌华2，周 毅1，刘 晶1，肖 雪1，刘文清1，王京丽3 . 基于双光源图像特征的夜间能见度观测方法研究 [J]. 光谱学与光谱分析, 2014, 34(01): 1-5.
DAI Pang-da1, ZHANG Yu-jun1*, LU Chang-hua2, ZHOU Yi1, LIU Jing1, XIAO Xue1，LIU Wen-qing1, WANG Jing-li3 . Research on Night Visibility Estimation Method Based on Image Features of Dual Light Sources . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(01): 1-5.
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