Abstract
Digital photography visiometer system (DPVS), that is video visibility instrument, is a new visibility instrument. It adopts the advanced digital photographic technology, and entirely imitates the principle of manual visibility observation with human eye. It carries on the manual visibility observation method, and overcomes the defects of the optical visibility instrument. This paper introduces the basic principles of DPVS, and shows the comparative results and observation differences between DPVS, forward scattering visibility instrument (Vaisala FD12) and manual visibility observation in complicated weather conditions. The comparative results show that DPVS, Vaisala FD12, and manual observation share the same change trend. However, in rainy days and other complicated weather conditions, the observation results of DPVS differ from that of the FD12 to some extent, while are much closer to that of manual observation. In the end of the paper, a concrete theoretical analytic conclusion on observation differences is provided.
Published Version
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