CAJ | 학술논문

以视觉方法观测能见度为研究核心，提出了基于双光源图像特征的夜间能见度观测方法，完成在各种不同天气情况下，对能见度的大范围、高精度、高鲁棒观测。首先分析多次散射条件下，光源图像亮度变化与大气消光之间的关系，得出反演能见度的基本模型，接着，研究了准确获取与能见度相关的光源图像特征提取算法，并提出了一种能消除光源波动的双光源能见度计算方法。最后，使用基于双光源图像特征的能见度观测系统在不同气象条件下进行实验，结果表明，在采用35 m基线长度，设定观测上限为15000 m时，观测误差均小于20％，能够满足气象与交通部门的要求。
이시각방법관측능견도위연구핵심，제출료기우쌍광원도상특정적야간능견도관측방법，완성재각충불동천기정황하，대능견도적대범위、고정도、고로봉관측。수선분석다차산사조건하，광원도상량도변화여대기소광지간적관계，득출반연능견도적기본모형，접착，연구료준학획취여능견도상관적광원도상특정제취산법，병제출료일충능소제광원파동적쌍광원능견도계산방법。최후，사용기우쌍광원도상특정적능견도관측계통재불동기상조건하진행실험，결과표명，재채용35 m기선장도，설정관측상한위15000 m시，관측오차균소우20％，능구만족기상여교통부문적요구。
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 rela-tive error is below 20% .This method and system can satisfy the demand of meteorological department and transport agency .