Single Image-Based Scene Visibility Estimation
Single Image-Based Scene Visibility Estimation
复制标题
DOI：
10.1109/access.2019.2894658
复制
发表时间：
2019-01-01
期刊：
影响因子：
3.9
通讯作者：
Xie, Bin
中科院分区：
文献类型：
--
作者：
Li, Qin;Li, Yi;Xie, Bin
提出了一种利用观测场景的单幅日光图像估计大气消光系数，进而获得场景可见度的新方法。所提出的方法包括三个步骤。首先，根据大气物理学理论，估算了观测场景中晴空大气的消光系数。其次，采用暗通道先验和基于边缘湍流的透射修正相结合的方法计算观测大气消光系数与晴空大气消光系数的比值。这一比值反映了大气浑浊度的增加使消光系数增大的程度。最后，通过将晴空大气的消光系数与比值相乘，计算出观测大气的消光系数，从而得到场景能见度。对所提出的方法的大量实验表明，它在测量各种类型的场景中的场景可见性方面表现良好，而无需额外的辅助（例如，摄像机的几何校准、道路标记提取和地面实况数据收集）。
This paper proposes a novel method to utilize a single daylight image of the observed scene to estimate the extinction coefficient of the observed atmosphere and obtain the scene visibility. The proposed method consists of three steps. First, based on the theory of atmospheric physics, we estimate the extinction coefficient of the clear atmosphere in an observed scene. Second, a method combining the dark channel prior and the edge collapse-based transmission refinement is employed to calculate the ratio between the extinction coefficient of the observed atmosphere and that of the clear atmosphere. This ratio indicates the increased degree of the extinction coefficient due to the increment of the atmospheric turbidity. Finally, by multiplying the extinction coefficient of the clear atmosphere and the ratio, the extinction coefficient of the observed atmosphere is calculated and the scene visibility is obtained. The numerous experiments on the proposed method suggest that it performs well in measuring the scene visibility in various types of scenes without additional assistance (e.g., geometric calibration of the camera, road marking extraction, and ground truth data collection).