Multi-encoder ConvNeXt Network with Smooth Attentional Feature Fusion for Multispectral Semantic Segmentation
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Abstract (arXiv)
This work proposes MeCSAFNet, a multi-branch encoder-decoder architecture for land cover segmentation in multispectral imagery. The model separately processes visible and non-visible channels through dual ConvNeXt encoders, followed by individual decoders that reconstruct spatial information. A dedicated fusion decoder integrates intermediate features at multiple scales, combining fine spatial cues with high-level spectral representations. The feature fusion is further enhanced with CBAM attention, and the ASAU activation function contributes to stable and efficient optimization. The model is designed to process different spectral configurations, including a 4-channel (4c) input combining RGB and NIR bands, as well as a 6-channel (6c) input incorporating NDVI and NDWI indices. Experiments on the Five-Billion-Pixels (FBP) and Potsdam datasets demonstrate significant performance gains. On FBP, MeCSAFNet-base (6c) surpasses U-Net (4c) by +19.21%, U-Net (6c) by +14.72%, SegFormer (4c) by +19.62%, and SegFormer (6c) by +14.74% in mIoU. On Potsdam, MeCSAFNet-large (4c) improves over DeepLabV3+ (4c) by +6.48%, DeepLabV3+ (6c) by +5.85%, SegFormer (4c) by +9.11%, and SegFormer (6c) by +4.80% in mIoU. The model also achieves consistent gains over several recent state-of-the-art approaches. Moreover, compact variants of MeCSAFNet deliver notable performance with lower training time and reduced inference cost, supporting their deployment in resource-constrained environments. Model code is available at: https://github.com/Leo-Thomas/mecsafnet
Key facts. Cited by 3 papers in the map (data through 7 Oct 2026). Builds on 17 of its 93 references that are in the map. First posted on arXiv 8 Feb 2026.
Builds on
17 of 93 references.
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5 more
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Citing papers per year: 2026: 3.
3 papers.
- 2026A Parameter-efficient Convolutional Approach for Camouflaged Weed Detection in Multispectral Aerial Imagerycited by 1
- 2026StrokeNeXt: A Siamese-encoder Approach for Brain Stroke Classification in Computed Tomography Imagerycited by 0
- 2026Lightweight Polyp Segmentation via a Gain-Aware Prediction-Space Recursive Controllercited by 0
- 2026Lightweight Polyp Segmentation via a Gain-Aware Prediction-Space Recursive Controller3 Jul 2026
- 2026A Parameter-efficient Convolutional Approach for Camouflaged Weed Detection in Multispectral Aerial Imagery28 Feb 2026
- 2026StrokeNeXt: A Siamese-encoder Approach for Brain Stroke Classification in Computed Tomography Imagery16 Feb 2026