1.中国地质大学(武汉)地理与信息工程学院,湖北 武汉,430078
2.中国地质调查局成都地质调查中心,四川 成都,610081
3.湖北省住房和城乡建设厅智能勘察工程技术创新中心,湖北 武汉,430063
4.中国铁路设计集团有限公司,天津,300308
5.城市轨道交通数字化建设与测评技术国家工程研究中心,天津,300308
侯旭娟,硕士生,主要从事地形超分辨率重建、三维地质建模方向研究。15033655660@163.com
花卫华,博士,教授。huaweihua@cug.edu.cn
收稿:2024-10-31,
纸质出版:2026-03-05
移动端阅览
侯旭娟,邓筱曈,花卫华,等.基于自适应生成对抗网络的DEM超分辨率重建方法[J].武汉大学学报(信息科学版),2026,51(3):557-566.
HOU Xujuan,DENG Xiaotong,HUA Weihua,et al.DEM Super-Resolution Reconstruction Method Based on Adaptive Generative Adversarial Network[J].Geomatics and Information Science of Wuhan University,2026,51(3):557-566.
侯旭娟,邓筱曈,花卫华,等.基于自适应生成对抗网络的DEM超分辨率重建方法[J].武汉大学学报(信息科学版),2026,51(3):557-566. DOI:10.13203/j.whugis20240186
HOU Xujuan,DENG Xiaotong,HUA Weihua,et al.DEM Super-Resolution Reconstruction Method Based on Adaptive Generative Adversarial Network[J].Geomatics and Information Science of Wuhan University,2026,51(3):557-566. DOI:10.13203/j.whugis20240186
数字高程模型(digital elevation model
DEM)作为城市建模、灾害评估及三维可视化的数据基础,将其作为输入能够提高许多地理分析应用的准确性和可靠性。为减少重建DEM中的伪影和噪声,提高DEM超分辨率重建的精度,提出了一种结合自适应变形残差卷积与U-Net判别器的超分辨率生成对抗网络(super-resolution generative adversarial network with adaptive deformable residual convolutions and U-Net discriminator
SRDCGAN)方法,实现了DEM的4倍超分辨率重建。对DEM的重建精度进行评估,实验的4组数据集结果表明,均方根误差(root mean square error
RMSE)均值下降了0.3%~12.6%,平均绝对误差(mean absolute error
MAE)均值下降了3.2%~14.5%,坡度误差(slope error
SE)均值下降了1.9%~18.3%,坡向误差(aspect error
AE)均值下降了2.7%~7.1%。将重建效果与双三次插值及超分辨率生成对抗网络方法进行对比,结果显示SRDCGAN方法能够有效去除伪影并保留更多的地形特征,在RMSE、MAE、SE和AE精度评价指标上均有显著改善。
Objectives
2
Digital elevation model (DEM) serves as the fundamental data infrastructure for urban modeling
disaster assessment
and high-fidelity three-dimensional visualization. DEM as an input can significantly enhance the accuracy and reliability of diverse geographic information system applications. To address the inherent limitations of traditional interpolation and standard deep learning models in terrain reconstruction
we aim to develop a super-resolution generative adversarial network with adaptive deformable residual convolutions and U-Net discriminator (SRDCGAN) to suppress reconstruction artifacts and noise while simultaneously elevating the precision of DEM reconstruction.
Methods
2
The proposed SRDCGAN method features several technical innovations: (1) The feature extraction layer of the generator incorporates a multi-level residual in residual dense block (RRDB) coupled with an adaptive deformable residual convolution mechanism. The RRDB structure effectively mitigates grid artifacts and high-frequency noise by nesting dense connections within a high-level residual framework. (2) To capture complex geomorphic features
adaptive deformable convolutional layers are integrated into the network. This allows the model to adaptively adjust sampling offsets based on local terrain complexity
providing superior flexibility in learning irregular terrain structures. (3) The discriminator is redesigned using a U-Net architecture augmented with an attention block to facilitate multi-scale feature fusion and capture extensive global receptive fields.
Results
2
The performance is rigorously validated across four distinct terrain datasets. Quantitative analysis indicates that compared to the baseline super-resolution generative adversarial network model
the mean values of the root mean square error and the mean absolute error of the proposed method are reduced by 0.3%-12.6% and 3.2%-14.5%
respectively. Furthermore
terrain derivative accuracy shows marked improvements
with the mean values of the slope error and the aspect error declining by 1.9%-18.3% and 2.7%-7.1%
respectively. Comparative evaluations demonstrate that the proposed SRDCGAN method effectively eliminates visual artifacts and preserves intricate topographic textures.
Conclusions
2
The experimental findings verify that the proposed SRDCGAN method establishes a robust mapping relationship between high-resolution and low-resolution DEM data
showing strong generalization capabilities across diverse geographical regions.
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