ASANet: Asymmetric Semantic Aligning Network for RGB and SAR image land cover classification

• URL: http://arxiv.org/abs/2412.02044v1
• Date: Tue, 03 Dec 2024 00:03:33 GMT
• Title: ASANet: Asymmetric Semantic Aligning Network for RGB and SAR image land cover classification
• Authors: Pan Zhang, Baochai Peng, Chaoran Lu, Quanjin Huang,
• Abstract summary: We propose a novel architecture, named the Asymmetric Semantic Aligning Network (ASANet) to address the issue of asymmetry at the feature level. The proposed ASANet effectively learns feature correlations between the two modalities and eliminates noise caused by feature differences. We have established a new RGB-SAR multimodal dataset, on which our ASANet outperforms other mainstream methods with improvements ranging from 1.21% to 17.69%.
• Score: 5.863175733097434
• License:
• Abstract: Synthetic Aperture Radar (SAR) images have proven to be a valuable cue for multimodal Land Cover Classification (LCC) when combined with RGB images. Most existing studies on cross-modal fusion assume that consistent feature information is necessary between the two modalities, and as a result, they construct networks without adequately addressing the unique characteristics of each modality. In this paper, we propose a novel architecture, named the Asymmetric Semantic Aligning Network (ASANet), which introduces asymmetry at the feature level to address the issue that multi-modal architectures frequently fail to fully utilize complementary features. The core of this network is the Semantic Focusing Module (SFM), which explicitly calculates differential weights for each modality to account for the modality-specific features. Furthermore, ASANet incorporates a Cascade Fusion Module (CFM), which delves deeper into channel and spatial representations to efficiently select features from the two modalities for fusion. Through the collaborative effort of these two modules, the proposed ASANet effectively learns feature correlations between the two modalities and eliminates noise caused by feature differences. Comprehensive experiments demonstrate that ASANet achieves excellent performance on three multimodal datasets. Additionally, we have established a new RGB-SAR multimodal dataset, on which our ASANet outperforms other mainstream methods with improvements ranging from 1.21% to 17.69%. The ASANet runs at 48.7 frames per second (FPS) when the input image is 256x256 pixels. The source code are available at https://github.com/whu-pzhang/ASANet

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