Abstract
Cloud is an important meteorological information in remote sensing applications as it plays a significant role in the Earth’s climate and weather patterns, but it also brings difficulties to the information extraction from optical images, especially when the underlying surface features to be analyzed are obscured. Therefore, cloud detection is an indispensable step in optical remote sensing image processing. Different from low-spatial resolution images, medium and high-resolution images contain richer geographical features, and the distribution of clouds is more scattered, which makes it necessary to enhance the network’s ability on detailed features extraction. Therefore, the two cascaded U-shape attention networks (CUA-Net) model is proposed to detect the cloud in Landsat 8 images. In the first U-shape network, the up-sampling layers in path expansion integrate the information from all previous layers to make full use of multi-scale features. Additionally, the attention modules in the skip connection are added to detect the position and edges of cloud accurately. After that, the second U-shape network is utilized to optimize the preliminary segmentations from the first network, thus obtaining results closer to the ground truth. In the experiments, CUA-Net was evaluated on 38-Cloud Dataset and compared with current mainstream networks, showing significant improvements both on visual effects and quantitative indicators.
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Acknowledgement
The authors are grateful to the reviewers for their attention and comments on our paper. This research is supported by the National Natural Science Foundation of China (NSFC) under Grant no. 42171302 and the Key R&D Program of Hubei Province, China (2021BAA185).
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Li, A., Yang, J., Li, X. (2023). Cloud Detection from Remote Sensing Images by Cascaded U-shape Attention Networks. In: Lu, H., et al. Image and Graphics. ICIG 2023. Lecture Notes in Computer Science, vol 14355. Springer, Cham. https://doi.org/10.1007/978-3-031-46305-1_13
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