18 August 1998 Comparing experiments of digital photography visiometer
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Abstract
This paper reports a digital photography visiometer (DPV), an automatic digital photography visibility system, that can directly measure and monitor horizontal visibility during daytime through digital shooting. After shooting a scene of given black object and background via its CCD digital camera, the system can capture and transfer photographic images in the camera to a computer, as well as process the digital images and calculate the value of visibility. The formulas for calculating visibility with this method and analyzing the effect of non-black object on measured result are also given. And then the comparison of DPV observations with a lidar-visibility measurements and visual observations are carried out. The results show that the average deviation and relative average deviation of visibility acquired by DPV from lidar-visibility measurements are respectively within 0.927 km (and 0.26 km) and 6.68 percent (and 7.99 percent).
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XingSheng Xie, XingSheng Xie, ShangChang Tao, ShangChang Tao, XiuJi Zhou, XiuJi Zhou, } "Comparing experiments of digital photography visiometer", Proc. SPIE 3501, Optical Remote Sensing of the Atmosphere and Clouds, (18 August 1998); doi: 10.1117/12.317726; https://doi.org/10.1117/12.317726
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