Journal of Atmospheric and Environmental Optics, Volume. 19, Issue 4, 405(2024)

An improved cloud detection algorithm based on differential enhancement

SHU Xu1...2,*, WANG Zhenzhu2,3,4, DENG Shumei1, KUANG Zhiqiang2,4, WU Decheng2,3, and LIU Dong2,34 |Show fewer author(s)
Author Affiliations
  • 1School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
  • 2Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, HFIPS,Chinese Academy of Sciences, Hefei 230031, China
  • 3Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China
  • 4University of Science and Technology of China, Hefei 230026, China
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    As a powerful tool for active remote sensing of the atmosphere, lidar can be used to monitor the spatial and temporal distribution of clouds automatically and continuously. An improved cloud detection algorithm based on differential enhancement is proposed in this work. By introducing integral area and peak ratio algorithm, the improved algorithm cannot only effectively reduce the number of data fitting points during differentiation, improve the authenticity of cloud data, but also avoid misjudgment caused by strong noise points after differentiation in the traditional differential enhancing cloud detection algorithm. In addition, the improved algorithm also adds the merging of characteristic clouds, which can effectively reduce the mission caused by the traditional algorithm in the case of single-layer and multi-peak signals. Finally, the three kinds of simulated lidar signals and the measured Mie scattered lidar signals are used to analyze and compare the algorithms before and after the improvement. The results show that the improved algorithm maintains the superiority of cloud detection under the conditions of low signal-to-noise ratio, while further reduces the misjudgment and mission of characteristic clouds.

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    Xu SHU, Zhenzhu WANG, Shumei DENG, Zhiqiang KUANG, Decheng WU, Dong LIU. An improved cloud detection algorithm based on differential enhancement[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(4): 405

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    Paper Information

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    Received: May. 10, 2022

    Accepted: --

    Published Online: Jan. 8, 2025

    The Author Email:

    DOI:10.3969/j.issn.1673-6141.2024.04.002

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