{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T23:42:34Z","timestamp":1776469354867,"version":"3.51.2"},"reference-count":54,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2022,3,2]],"date-time":"2022-03-02T00:00:00Z","timestamp":1646179200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT, MOE)","award":["2019M3E7A1113103"],"award-info":[{"award-number":["2019M3E7A1113103"]}]},{"name":"Graduate School of Particulate Matter Specialization&quot; of Korea Environmental Industry &amp; Technology Institute grant funded by the Ministry of Environment, Republic of Korea","award":["None"],"award-info":[{"award-number":["None"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>In this study, we attempted to calculate the extinction parameters of PM2.5 using images from a commercial camera. The photo pixels provided information on the characteristics of the objects (i.e., the reflectivity, transmittance, or extinction efficiency) and ambient brightness. Using the RGB values of pixels, we calculated the extinction coefficient and efficiency applied to the mass concentration of PM2.5. The calculated extinction coefficient of PM2.5 determined from the camera images had a higher correlation with the PM2.5 mass concentration (R2 = 0.7) than with the visibility data, despite the limited mass range. Finally, we identified that the method of calculating extinction parameters using the effective wavelength of RGB images could be applied to studies of changes in the atmosphere and aerosol characteristics. The mass extinction efficiency of PM2.5, derived from images, and the mass concentration of PM2.5 was (10.8 \u00b1 6.9) m2 g\u22121, which was higher than the values obtained in Northeast Asia by previous studies. We also confirmed that the dry extinction efficiency of PM2.5, applied with a DRH of 40%, was reduced to (6.9 \u00b1 5.0) m2 g\u22121. The extinction efficiencies of PM2.5, calculated in this study, were higher than those reported in previous other studies. We inferred that high extinction efficiency is related to changes in size or the composition of aerosols; therefore, an additional long-term study must be conducted.<\/jats:p>","DOI":"10.3390\/rs14051224","type":"journal-article","created":{"date-parts":[[2022,3,2]],"date-time":"2022-03-02T22:53:25Z","timestamp":1646261605000},"page":"1224","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Estimation of Aerosol Extinction Coefficient Using Camera Images and Application in Mass Extinction Efficiency Retrieval"],"prefix":"10.3390","volume":"14","author":[{"given":"Juseon","family":"Shin","sequence":"first","affiliation":[{"name":"Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Korea"}]},{"given":"Dukhyeon","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Basic Science, Hanbat National University, Daejeon 34158, Korea"}]},{"given":"Youngmin","family":"Noh","sequence":"additional","affiliation":[{"name":"Department of Environmental Engineering, Pukyong National University, Busan 48513, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2331","DOI":"10.1161\/CIR.0b013e3181dbece1","article-title":"Particulate matter air pollution and cardiovascular disease: An update to the scientific statement from the American Heart Association","volume":"121","author":"Brook","year":"2010","journal-title":"Circulation"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"136","DOI":"10.1016\/j.envint.2014.10.005","article-title":"A review on the human health impact of airborne particulate matter","volume":"74","author":"Kim","year":"2015","journal-title":"Environ. 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