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• W4386078207 abstract "Complementary multimodal remote sensing (RS) data often leads to more robust and accurate classification performance. However, not all modal data can be available at the time of inference due to imaging conditions. To mitigate this issue, cross-modal knowledge distillation becomes an effective method, as it can leverage the complementary characteristics of multimodal data to guide cross-modal classification in cases with missing data. Therefore, this paper examines the shortcomings of traditional CNN cross-modal distillation methods in land cover classification: 1) insufficient knowledge representation; and 2) unstable knowledge transfer. Moreover, a novel cross-modal graph knowledge representation and distillation learning (CGKR-DL) framework is proposed to enhance land cover classification performance. The proposed CGKR-DL designs a single-stream joint feature learning network with convolutional neural network and graph convolutional network (CNN-GCN) to effectively construct the remote topology of data based on the strong correlation between land objects, thus enhancing the knowledge representation ability of the network. In addition, a multi-granularity graph distillation method is proposed to compensate for the inability of traditional CNN distillation in handling graph-structured information, where a feature distillation module based on graph discrimination (FD-GDM) is designed for stable graph feature distillation. We evaluate CGKR-DL on three publicly available multimodal RS datasets (HS-LiDAR, HS-SAR and HS-SAR-DSM) and achieve a significant improvement in comparison with several state-of-the-art methods." @default.
• W4386078207 created "2023-08-23" @default.
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• W4386078207 date "2023-01-01" @default.
• W4386078207 modified "2023-10-16" @default.
• W4386078207 title "Cross-modal Graph Knowledge Representation and Distillation Learning for Land Cover Classification" @default.
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• W4386078207 doi "https://doi.org/10.1109/tgrs.2023.3307604" @default.
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