FWENet: a deep convolutional neural network for flood water body extraction based on SAR images

Autor: Jingming Wang, Shixin Wang, Futao Wang, Yi Zhou, Zhenqing Wang, Jianwan Ji, Yibing Xiong, Qing Zhao
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: International Journal of Digital Earth, Vol 15, Iss 1, Pp 345-361 (2022)
Druh dokumentu: article
ISSN: 1753-8947
1753-8955
17538947
DOI: 10.1080/17538947.2021.1995513
Popis: As one of the most severe natural disasters in the world, floods caused substantial economic losses and casualties every year. Timely and accurate acquisition of flood inundation extent could provide technical support for relevant departments in the field of flood emergency response and disaster relief. Given the accuracy of existing research works extracting flood inundation extent based on Synthetic Aperture Radar (SAR) images and deep learning methods is relatively low, this study utilized Sentinel-1 SAR images as the data source and proposed a novel model named flood water body extraction convolutional neural network (FWENet) for flood information extraction. Then three classical semantic segmentation models (UNet, Deeplab v3 and UNet++) and two traditional water body extraction methods (Otsu global thresholding method and Object-Oriented method) were compared with the FWENet model. Furthermore, this paper analyzed the water body area change situations of Poyang Lake. The main results of this paper were as follows: Compared with other five water body extraction methods, the FWENet model achieved the highest water body extraction accuracy, its F1 score and mean intersection over union (mIoU) were 0.9871 and 0.9808, respectively. This study could guarantee the subsequent research on flood extraction based on SAR images.
Databáze: Directory of Open Access Journals
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