大气能见度对航空、航海、陆上交通、**活动等均有重要的影响。新兴的图像法测量能见度方法, 采用的相机由于成像亮度、动态范围存在误差使得测量的能见度也存在一定误差。详细分析相机拍摄的目标亮度增益误差、目标亮度零点误差、天空背景亮度增益误差和天空背景亮度零点误差引起的能见度测量相对误差, 并得到上述4种误差的能见度总相对误差, 验证利用图像法进行能见度测量的可行性和有效性。

Atmospheric visibility has an important impact on aviation, navigation, land transportation, military activities and so on.The image method based visibility measurement is a new method, which has a certain degree of error in the measurement of visibility because of the errors of the imaging brightness and the dynamic range.The relative errors of visibility measurement caused by target brightness gain error, target brightness zero error, sky background brightness gain error and sky background brightness zero error are analyzed in detail.The total relative errors of visibility caused by the above four errors are obtained.The feasibility and validity of the image method based visibility measurement are verified.