Reference health
An automated cloud detection method based on the green channel of total-sky visible images
23/23 checkable references clean · checked 2026-07-23
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
14 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 23 checked references that resolve
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Determination of the sun area in sky camera images using radiometric data
resolves10.1175/2007JTECHA959.1
Feature Extraction from Whole-Sky Ground-Based Images for Cloud-Type Recognition
resolves10.1016/j.solener.2011.08.025
Intra-hour forecasting with a total sky imager at the UC San Diego solar energy testbed
resolves10.5194/amt-5-2881-2012
A method for cloud detection and opacity classification based on ground based sky imagery
resolves10.1175/2009JTECHA1324.1
Cloud Determination of All-Sky Images under Low-Visibility Conditions
resolves10.1016/j.atmosres.2012.05.005
Cloud detection and classification with the use of whole-sky ground-based images
resolves10.5194/amt-7-637-2014
Ground-based all-sky mid-infrared and visible imagery for purposes of characterizing cloud properties
resolves10.1175/JTECH-D-11-00009.1
A Hybrid Thresholding Algorithm for Cloud Detection on Ground-Based Color Images
resolves10.2174/1874282301004010045
Correcting for Circumsolar and Near-Horizon Errors in Sky Cover Retrievals from Sky Images
resolves10.1175/JTECH1875.1
Retrieving Cloud Characteristics from Ground-Based Daytime Color All-Sky Images
resolves10.1016/0038-092X(88)90045-X
The Astronomical Almanac's algorithm for approximate solar position (1950–2050)
resolves10.1175/1520-0450(2003)042<1421:CCBOAI>2.0.CO;2
Cloud Coverage Based on All-Sky Imaging and Its Impact on Surface Solar Irradiance
resolves10.1109/30.735836
Software pixel interpolation for digital still cameras suitable for a 32-bit MCU
resolves10.1175/JTECH1833.1
A Simple Method for the Assessment of the Cloud Cover State in High-Latitude Regions by a Ground-Based Digital Camera
resolves10.1175/2010JTECHA1353.1
The Use of Euclidean Geometric Distance on RGB Color Space for the Classification of Sky and Cloud Patterns
resolves10.1016/j.solener.2012.11.015
Equipment and methodologies for cloud detection and classification: A review
resolves10.1175/JTECH-D-11-00002.1
An Automated Cirrus Cloud Detection Method for a Ground-Based Cloud Image
The 14 references without a DOI — listed, not checked
no DOI — not checkedBayer, B. E.: Color imaging array, US patent 3971065, 10 pp., 1976.
no DOI — not checkedJohnson, R. W., Koehler, T. L., and Shields, J. E.: A multi-station set of whole sky imagers and a preliminary assessment of the emerging data base, Proc. Cloud Impacts on DOD Operations and Systems workshop, Silver Spring, MD, Department of Defense, 159–162, 1988.
no DOI — not checkedJohnson, R. W., Hering, W. S., and Shields, J. E.: Automated visibility and cloud cover measurements with a solid-state imaging system, University of California, San Diego, Scripps Institution of Oceanography, Marine Physical Laboratory, SIO89-7, GL-TR-89-0061, 1989.
no DOI — not checkedKoehler, T. L., Johnson, R. W., and Shields, J. E.: Status of the whole sky imager database, Proc. Cloud Impacts on DOD Operations and Systems, El Segundo, CA, USA, Department of Defense, 77–80, 1991.
no DOI — not checkedLong, C. N. and Deluisi, J. J.: Development of an automated hemispheric sky imager for cloud fraction retrievals, Proc. 10th Symp. on meteorological observations and instrumentation, Phoenix, Arizona, USA, 11–16 January, 171–174, 1998.
no DOI — not checkedMeeus, J.: Astronomical algorithms, Second ed, Willmann-Bell Inc., Virginia, USA, 477 pp., 1998.
no DOI — not checkedMontero, R. S. and Bribiesca, E.: State of the art of compactness and circularity measures, International Mathematical Forum, 27, 1305–1335, 2009.
no DOI — not checkedMorris, V. and Klebe, D.: A demonstration of the Solmirus all sky infrared visible analyzer, Poster presented in ASR Science Team Meeting, 15–19 March, Bethesda, Maryland, USA, p. 1, 2010.
no DOI — not checkedNakamura, J.: Image Sensors and Signal Processing for Digital Still Cameras, CRC Press, Boca Raton, USA, ISBN: 978-0-8493-3545-7, 350 pp., 2005.
no DOI — not checkedShields, J. E., Johnson, R. W., and Koehler, T. L.: Automated whole sky imaging systems for cloud field assessment, in: Fourth symposium of global change studies, 17–22 January, American Meteorological Society, Boston, Massachusetts, USA, 228–231, 1993.
no DOI — not checkedSpencer, J. M.: Fourier series representation of the position of the sun, Search, 2, 172 pp., 1971.
no DOI — not checkedYamashita, M., Yoshimura, M., and Nakashizuka, T.: Cloud cover estimation using multitemporal hemisphere imageries, in: ISPRS, XXXV Part B7, Commission VII, 12–23 June, Istanbul, Turkey, 2004.
no DOI — not checkedYang, J., Lu, W., Ma, Y., Yao, W., and Li, Q.: An automatic ground-based cloud detection method based on adaptive threshold, J. Appl. Meteor. Sci., 20, 713–721, 2009 (in Chinese).
no DOI — not checkedYang, J., Lu, W., Ma, Y., and Yao, W.: Method and device for measuring direct-normal irradiance based on total sky visible images, Chinese Invention Patent ZL201210199066.9, 14 pp., 2014 (in Chinese).
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