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Quantification of Atmospheric Visibility with Dual Digital Cameras During Daytime and Nighttime : Volume 6, Issue 8 (27/08/2013)

By Du, K.

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Book Id: WPLBN0003999153
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Quantification of Atmospheric Visibility with Dual Digital Cameras During Daytime and Nighttime : Volume 6, Issue 8 (27/08/2013)  
Author: Du, K.
Volume: Vol. 6, Issue 8
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description
Description: Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China. A digital optical method DOM-Vis was developed to measure atmospheric visibility. In this method, two digital pictures were taken of the same target at two different distances along the same straight line. The pictures were analyzed to determine the optical contrasts between the target and its sky background and, subsequently, visibility is calculated. A light transfer scheme for DOM-Vis was delineated, based upon which algorithms were developed for both daytime and nighttime scenarios. A series of field tests were carried out under different weather and meteorological conditions to study the impacts of such operational parameters as exposure, optical zoom, distance between the two camera locations, and distance of the target. This method was validated by comparing the DOM-Vis results with those measured using a co-located Vaisala® visibility meter. The visibility under which this study was carried out ranged from 1 to 20 km. This digital-photography-based method possesses a number of advantages compared with traditional methods. Pre-calibration of the detector with a visibility meter is not required. In addition, the application of DOM-Vis is independent of several factors like the exact distance of the target and several camera setting parameters. These features make DOM-Vis more adaptive under a variety of field conditions.

Summary
Quantification of atmospheric visibility with dual digital cameras during daytime and nighttime

Excerpt
Baumer, D., Versick, S., and Vogel, B.: Determination of the visibility using a digital panorama camera, Atmos. Environ., 42, 2593–2602, 2008.; Auvermann, B. W., Hiranuma, N., Heflin, K., and Marek, G. W.: Open-Path Transmissometry for Measurement of Visibility Impairment by Fugitive Emissions from Livestock Facilities, ASAE/CSAE Annual International Meeting, Ottawa, Ontario, Canada, 2004,; Charlson, R. J.: Atmospheric Visibility Related to Aerosol Mass Concentration, Environ. Sci. Technol., 3, 913–918, 1969.; Du, K.: Optical remote sensing of airborne particulate matter to quantify opacity and mass emissions, Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, 145 pp., 2007.; Horvath, H.: Atmospheric Visibility, Atmospheric Environment, 15, 1785–1796, 1981.; Koschmieder, H.: Theorie der horizontalen sichtweite, Beitr. Phys. frei. Atmos., 12, 171–181, 1924.; Liaw, J.-J., Lian, S.-B., Huang, Y.-F., and Chen, R.-C.: Atmospheric visibility monitoring using digital image analysis techniques, in: Analysis of Images and Patterns, edited by: Jiang, X. and Petkov, N., Springer-Verlag, Berlin, Heidelberg, 1204–1211, 2009.; Luo, C.-H., Liu, S.-H., and Yuan, C.-S.: Measuring atmospheric visibility by digital image processing, Aerosol Air Qual. Res., 2, 23–29, 2002.; Lv, W., Tao, S., Liu, Y., Tan, Y., and Wang, B.: Measuring Meteorological Visibility Based on Digital Photography – Dual Differential Luminance Method and Experimental Study, Chin. J. Atmos. Sci., 28, 559–570, 2004.; Lv, W., Liu, S., and Tan, Y.: Error analyses of daytime meteorological visibility measurement using dual differential luminance algorithm, J. Appl. Meteorol. Sci., 16, 619–628, 2005.; Malm, W. C.: Considerations in the Measurement of Visibility, J. Air Poll. Contr. Assoc., 29, 1042–4052, 1979.; Malm, W. C.: Introduction to Visibility, Colorado State University, Fort Collins, 1–79, 1999.; Middleton, W. E. K.: Vision through the atmosphere, University of Toronto Press, Toronto, 250 pp., 1952.; Molenar, J. V., Malm, W. C., and Johnson, C. E.: Visual Air Quality Simulation Techniques, Atmos. Environ., 28, 1055–1063, 1994.; Richards, L. W., Stoelting, M., and Hammarstrand, R. G. M.: Photographic Method for Visibility Monitoring, Environ. Sci. Technol., 23, 182–186, 1989.; Wang, K., Dickinson, R. E., and Liang, S.: Clear Sky Visibility Has Decreased over Land Globally from 1973 to 2007, Science, 323, 1468–1470, 2009.; World Meteorological Organization: Guide to Meteorological Instrument and Observing Practices, 4th Edn., WMO-No. 8, TP. 3, Secretariat of the World Meteorological Organization, Geneva, Switzerland 1971.; Xie, L., Chiu, A., and Newsam, S.: Estimating atmospheric visibility using general-purpose cameras, in: Advances in Visual Computing, Lect. Not. Comput. Sci., 356–367, 2008.; Xie, X., Tao, S., and Zhou, X.: Measuring Visibility Using Digital Photography, Chin. Sci. Bull., 44, 1130–1134, 1999.

 

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