Cloud Detection Method Based on All-Sky Polarization Imaging
Sky cloud detection has a significant application value in the meteorological field. The existing cloud detection methods mainly rely on the color difference between the sky background and the cloud layer in the sky image and are not reliable due to the variable and irregular characteristics of the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/22/16/6162 |
| _version_ | 1797431725409697792 |
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| author | Wunan Li Yu Cao Wenjing Zhang Yu Ning Xiaojun Xu |
| author_facet | Wunan Li Yu Cao Wenjing Zhang Yu Ning Xiaojun Xu |
| author_sort | Wunan Li |
| collection | DOAJ |
| description | Sky cloud detection has a significant application value in the meteorological field. The existing cloud detection methods mainly rely on the color difference between the sky background and the cloud layer in the sky image and are not reliable due to the variable and irregular characteristics of the cloud layer and different weather conditions. This paper proposes a cloud detection method based on all-sky polarization imaging. The core of the algorithm is the “normalized polarization degree difference index” (<i>NPDDI</i>). Instead of relying on the color difference information, this index identifies the difference between degree of polarization (<i>DoPs</i>) of the cloud sky and the clear sky radiation to achieve cloud recognition. The method is not only fast and straightforward in the algorithm, but also can detect the optical thickness of the cloud layer in a qualitative sense. The experimental results show a good cloud detection performance. |
| first_indexed | 2024-03-09T09:50:27Z |
| format | Article |
| id | doaj.art-e6ba7d1550af46918848ba0e2e0779b0 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T09:50:27Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e6ba7d1550af46918848ba0e2e0779b02023-12-02T00:17:12ZengMDPI AGSensors1424-82202022-08-012216616210.3390/s22166162Cloud Detection Method Based on All-Sky Polarization ImagingWunan Li0Yu Cao1Wenjing Zhang2Yu Ning3Xiaojun Xu4College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaSchool of Mathematics and Physics, Qingdao University of Science & Technology, Qingdao 266061, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaSky cloud detection has a significant application value in the meteorological field. The existing cloud detection methods mainly rely on the color difference between the sky background and the cloud layer in the sky image and are not reliable due to the variable and irregular characteristics of the cloud layer and different weather conditions. This paper proposes a cloud detection method based on all-sky polarization imaging. The core of the algorithm is the “normalized polarization degree difference index” (<i>NPDDI</i>). Instead of relying on the color difference information, this index identifies the difference between degree of polarization (<i>DoPs</i>) of the cloud sky and the clear sky radiation to achieve cloud recognition. The method is not only fast and straightforward in the algorithm, but also can detect the optical thickness of the cloud layer in a qualitative sense. The experimental results show a good cloud detection performance.https://www.mdpi.com/1424-8220/22/16/6162all-sky polarization imagingcloud assessmentpolarization degreeatmospheric scatteringimage fusion |
| spellingShingle | Wunan Li Yu Cao Wenjing Zhang Yu Ning Xiaojun Xu Cloud Detection Method Based on All-Sky Polarization Imaging Sensors all-sky polarization imaging cloud assessment polarization degree atmospheric scattering image fusion |
| title | Cloud Detection Method Based on All-Sky Polarization Imaging |
| title_full | Cloud Detection Method Based on All-Sky Polarization Imaging |
| title_fullStr | Cloud Detection Method Based on All-Sky Polarization Imaging |
| title_full_unstemmed | Cloud Detection Method Based on All-Sky Polarization Imaging |
| title_short | Cloud Detection Method Based on All-Sky Polarization Imaging |
| title_sort | cloud detection method based on all sky polarization imaging |
| topic | all-sky polarization imaging cloud assessment polarization degree atmospheric scattering image fusion |
| url | https://www.mdpi.com/1424-8220/22/16/6162 |
| work_keys_str_mv | AT wunanli clouddetectionmethodbasedonallskypolarizationimaging AT yucao clouddetectionmethodbasedonallskypolarizationimaging AT wenjingzhang clouddetectionmethodbasedonallskypolarizationimaging AT yuning clouddetectionmethodbasedonallskypolarizationimaging AT xiaojunxu clouddetectionmethodbasedonallskypolarizationimaging |