Affiliation:
1. Key Laboratory for Atmosphere and Global Environment Observation, Chinese Academy of Sciences, Beijing, China
Abstract
Abstract
The threshold method is commonly used to determine cloud in a sky image. This paper evaluates the method by numerical simulation and shows that the aerosol optical depth (AOD) is a key factor that influences the accuracy. Particularly when the visibility is low, a single threshold method is inappropriate. To improve the accuracy of cloud determination from low-visibility sky images, an integrated cloud-determination algorithm is presented that is based on the fast Fourier transform, symmetrical image features, and threshold methods. The preliminary comparison tests show that the new integrated method improves the ability to determine cloud under lower-visibility conditions.
Publisher
American Meteorological Society
Subject
Atmospheric Science,Ocean Engineering
Cited by
36 articles.
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