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The overlapping of black dot decreases brightness and black dot is very sensitive to the human visual system in the bright region. In this paper, for gray-level expression, only the bright gray region in the color image was considered for blue noise mask (BNM) approach. To solve this problem, BNM with CMY dot was used for the bright region instead of black(More)
The Langley plot method applied on the Brewer Ozone measurements can provide accurate Aerosol Optical Depth (AOD) in the UV-B. We present seven intercompar-isons between AOD retrieved from Brewer Ozone measurements and AOD measured by CIMEL sunphotometer, which are stored in the international AERONET database. 5 Only the intercomparisons between co-located(More)
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