SAR影像洪水淹没范围深度学习提取方法

doi:10.16265/j.cnki.issn1003-3033.2022.04.026

摘要/Abstract

摘要：

为提高洪涝灾害应急救援辅助决策能力,快速提取洪水淹没范围,提出一种基于深度学习的合成孔径雷达(SAR)影像洪水淹没范围提取方法。首先,基于DeepLab v3+模型,建立合成孔径雷达(SAR)影像洪水淹没范围提取模型;然后,针对SAR影像标注数据获取困难的问题,提出一种基于光学影像水体指数的半自动化标注样本制作方法,该方法大幅度减少标注工作的人工量和所需时间;最后,采用Sentinel-1卫星影像验证洪水淹没范围提取模型准确度。结果表明:提出的洪水淹没范围提取模型对复杂地表适应性较强;相比于自适应阈值方法,其识别精度更高,对遥感影像中的水体边缘、小面积水体、细长线状水体识别效果更优,该模型平均交并比为0.83。

关键词: 合成孔径雷达(SAR), 洪水淹没范围, 深度学习, DeepLab v3+模型, 水体提取

Abstract:

In order to improve decision-making ability for flood disaster emergency rescue and quickly extract flood inundation areas, an extraction method of SAR images based on deep learning was proposed. Firstly, flood inundation area extraction model of SAR images was established based on DeepLab v3+ model. Then, considering difficulty in obtaining labeled samples of SAR images, a semi-automatic sample making method based on optical image water index was proposed, which greatly reduced the labor and time required for annotation. Lastly, Sentinel-1 images were used for experimental analysis to verify the model's accuracy. The results show that the proposed extraction model has strong adaptability to complex surfaces. Compared with the adaptive threshold method, it features higher recognition accuracy, and better recognition effect of water edge, small area water body and thin and long linear water body in remote sensing image, with an mean Intersection over Union of 0.83.

Key words: synthetic aperture radar (SAR), flood inundation area, deep learning, DeepLab v3+ model, water extraction

郭玮, 袁宏永, 薛明, 魏平岩. SAR影像洪水淹没范围深度学习提取方法[J]. 中国安全科学学报, 2022, 32(4): 177-184.

GUO Wei, YUAN Hongyong, XUE Ming, WEI Pingyan. Flood inundation area extraction method of SAR images based on deep learning[J]. China Safety Science Journal, 2022, 32(4): 177-184.

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