Abstract
Cloud detection is one of the important tasks in remote sensing image preprocessing, and this paper uses RGB preview images of remote sensing images to extract cloud regions efficiently. The preview images make the detection of cloud regions more challenging due to the lack of resolution and spectral information. The existing remote sensing image cloud detection methods, and feature fusion process, due to unreasonable feature fusion strategy, so that the encoded features cannot be fully utilized, which may introduce noise information, and ultimately lead to the problems of false detection and missing detection. To address these problems, this work designs a gated aggregation network (GANet) for remote sensing image cloud detection. GANet has a novel encoder–decoder architecture, a gated feature aggregation module (GFAM), and a pyramidal attention pooling module (PAPM). GFAM bridges the gap between high resolution with spatial details and low-resolution features with high-level semantics, fully selectively fusing semantic and spatial features to alleviate the semantic divide problem when fusing multi-level features. PAPM extracts multi-scale global contextual features without loss of resolution. The method is validated on three datasets: the publicly available 38-Cloud and SPARCS datasets and the self-built Landsat-8 cloud detection dataset with higher spatial resolution. The experimental results show that the proposed method achieves competitive performance under different evaluation metrics. Codes and datasets can be found at https://github.com/HaiLei-Fly/GANet/.
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Data availability
The data and the code of this study are open source at https://github.com/HaiLei-Fly/GANet and https://github.com/HaiLei-Fly/CHLandsat8.
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Funding
This work is supported in part by the National Natural Science Foundation of China (62241307), the Scientific and Technological Project of Gansu Province (22YF7FA166), the Scientific and Technological Project of Lanzhou City (2022-RC-60), and the University Innovation Fund Project of Gansu Province (2021A-027).
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Du, X., Wu, H. Gated aggregation network for cloud detection in remote sensing image. Vis Comput 40, 2517–2536 (2024). https://doi.org/10.1007/s00371-023-02934-7
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DOI: https://doi.org/10.1007/s00371-023-02934-7