A Dual Neighborhood Hypergraph Neural Network for Change Detection in VHR Remote Sensing Images

• URL: http://arxiv.org/abs/2202.13275v1
• Date: Sun, 27 Feb 2022 02:39:08 GMT
• Title: A Dual Neighborhood Hypergraph Neural Network for Change Detection in VHR Remote Sensing Images
• Authors: Junzheng Wu, Ruigang Fu, Qiang Liu, Weiping Ni, Kenan Cheng, Biao Li, Yuli Sun
• Abstract summary: A dual neighborhood hypergraph neural network is proposed in this article. The proposed method comprises better effectiveness and robustness compared to many state-of-the-art methods.
• Score: 12.222830717774118
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The very high spatial resolution (VHR) remote sensing images have been an extremely valuable source for monitoring changes occurred on the earth surface. However, precisely detecting relevant changes in VHR images still remains a challenge, due to the complexity of the relationships among ground objects. To address this limitation, a dual neighborhood hypergraph neural network is proposed in this article, which combines the multiscale superpixel segmentation and hypergraph convolution to model and exploit the complex relationships. First, the bi-temporal image pairs are segmented under two scales and fed to a pre-trained U-net to obtain node features by treating each object under the fine scale as a node. The dual neighborhood is then defined using the father-child and adjacent relationships of the segmented objects to construct the hypergraph, which permits models to represent the higher-order structured information far more complex than just pairwise relationships. The hypergraph convolutions are conducted on the constructed hypergraph to propagate the label information from a small amount of labeled nodes to the other unlabeled ones by the node-edge-node transform. Moreover, to alleviate the problem of imbalanced sample, the focal loss function is adopted to train the hypergraph neural network. The experimental results on optical, SAR and heterogeneous optical/SAR data sets demonstrate that the proposed method comprises better effectiveness and robustness compared to many state-of-the-art methods.

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