Remote Sensing for Natural Resources >
A boundary guidance and cross-scale information interaction network for water body extraction from remote sensing images
Received date: 2023-07-24
Revised date: 2023-11-21
Online published: 2026-06-03
Extracting accurate water body information holds great significance for water resources protection and urban planning. However, due to numerous surface features and complex environments, along with different morphologies, scales, and spectral characteristics of different water bodies, remote sensing images inevitably exhibit heterogeneity, spectral similarities, and inter-class similarities between water bodies and other surface features. Existing methods fail to fully exploit boundary cues, the semantic correlation between different layers, and multi-scale representations, rendering the accurate information extraction of water bodies from remote sensing images still challenging. This study proposed a boundary guidance and cross-scale information interaction network (BGCIINet) for information extraction of water bodies from remote sensing images. First, this study proposed a boundary guidance (BG) module for the first time by combing the Sobel operator. This module can be used to effectively capture boundary cues in low-level features and efficiently embed these cues into a decoder to produce rich boundary information. Second, a cross-scale information interaction (CII) module was introduced to enhance the multi-scale representation capability of the network and facilitate information exchange between layers. Extensive experiments on two datasets demonstrate that the proposed method outperforms four state-of-the-art methods, offering rich boundary details and completeness under challenging scenarios. Therefore, the proposed method is more effective in extracting water body information from remote sensing images. This study will provide a valuable reference of methods for future research.
CHEN Jiaxue , XIAO Dongsheng , CHEN Hongyu . A boundary guidance and cross-scale information interaction network for water body extraction from remote sensing images[J]. Remote Sensing for Natural Resources, 2025 , 37(1) : 15 -23 . DOI: 10.6046/zrzyyg.2023230
表1 DeepGlobe数据集与LandCover数据集的详细信息Tab.1 Details of DeepGlobe dataset and LandCover dataset |
| 参数 | DeepGlobe | LandCover |
|---|---|---|
| 影像大小/像素 | 2 048×2 048 | 最大为9 000×9 500 |
| 分辨率/m | 0.5 | 0.25和0.5 |
| 影像来源 | 卫星影像 | 航空影像 |
表2 数据集部分样本Tab.2 Some samples of the dataset |
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表3 DeepGlobe数据集上的定量比较Tab.3 Quantitative comparison on the DeepGlobe dataset (%) |
| 方法 | IoU | F1 | Precision | Recall | OA |
|---|---|---|---|---|---|
| Attention Unet | 82.62 | 90.48 | 92.78 | 88.30 | 96.62 |
| PSPNet | 88.66 | 93.99 | 94.77 | 93.23 | 97.83 |
| DANet | 81.52 | 89.82 | 90.38 | 89.27 | 96.32 |
| DeepLabV3+ | 93.59 | 96.69 | 97.00 | 96.37 | 98.80 |
| 本文方法 | 94.67 | 97.26 | 97.76 | 96.77 | 99.01 |
表4 LandCover数据集上的定量比较Tab.4 Quantitative comparison on the LandCover dataset (%) |
| 方法 | IoU | F1 | Precision | Recall | OA |
|---|---|---|---|---|---|
| Attention Unet | 86.13 | 92.55 | 94.88 | 90.33 | 95.94 |
| PSPNet | 92.18 | 95.93 | 96.25 | 95.62 | 97.74 |
| DANet | 84.60 | 91.66 | 92.64 | 90.70 | 95.39 |
| DeepLabV3+ | 91.99 | 95.83 | 94.63 | 97.06 | 97.64 |
| 本文方法 | 95.41 | 97.65 | 97.30 | 98.01 | 98.68 |
表5 不同挑战性场景下的可视化结果Tab.5 Visualization results in different challenging scenarios |
| 场景类型 | 影像 | Attention Unet | PSPNet | DANet | DeepLabV3+ | 本文方法 |
|---|---|---|---|---|---|---|
| 低对比度、光谱相似 | ![]() | |||||
| 不规则水体 | ![]() | |||||
| 小型水体 | ![]() | |||||
| 类间相似性 | ![]() | |||||
| 类内异质性 | ![]() | |||||
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表6 效率与复杂度比较Tab.6 Comparison of efficiency and complexity |
| 方法 | 参数量/106 | 浮点运 算数/109 | 模型大 小/MB | FPS/ (帧· ) |
|---|---|---|---|---|
| Attention Unet | 34.88 | 266.27 | 133.11 | 35.09 |
| PSPNet | 25.35 | 20.09 | 97.91 | 189.22 |
| DANet | 66.55 | 282.83 | 262.11 | 76.70 |
| DeepLabV3+ | 22.34 | 31.55 | 85.28 | 182.54 |
| 本文方法 | 21.95 | 48.45 | 83.82 | 114.49 |
表7 消融实验结果Tab.7 Ablation experiment results |
| 方法 | IoU/% | F1/% | OA/% | 参数 量/106 | 浮点运 算数/109 |
|---|---|---|---|---|---|
| 基线网络 | 90.51 | 95.02 | 98.18 | 21.66 | 31.22 |
| 去除BG模块 | 92.78 | 96.25 | 98.64 | 21.76 | 47.21 |
| 去除CII模块 | 92.83 | 96.28 | 98.65 | 21.85 | 32.47 |
| 本文方法 | 94.67 | 97.26 | 99.01 | 21.95 | 48.45 |
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