An Optimization Algorithm for Coronal Mass Ejection Image Matching Based on Dual-Domain Attention Enhanced Fusion Network
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摘要: 日冕物质抛射(Coronal Mass Ejection, CME)是引发灾害性空间天气事件的重要现象,动态可视化其传播过程有助于深入理解其物理机制并支持预警。增强现实(Augmented Reality, AR)技术通过虚实融合直观展示CME传播特性,但现有图像特征提取与匹配算法受限于特征表达不足和噪声干扰,难以满足高精度匹配需求。针对这一问题,本文提出基于双域注意力增强融合网络(Dual-Domain Attention Enhanced Fusion Network, DDFN)的CME图像匹配算法。该算法融合卷积神经网络(Convolutional Neural Network, CNN)的局部感知能力与视觉Transformer(Vision Transformer, ViT)的全局建模优势,引入空间域和通道域注意力机制强化多维度特征表达,结合Simple Contrastive Learning of Representations(SimCLR)对比学习框架提高对噪声和亮度变化的鲁棒性。实验结果显示,DDFN在原始及加噪声数据集上的Top-1匹配准确率分别达到81.76%和68.44%,显著优于其他模型。此外,将该算法成功部署于AR系统,实现了CME图像的高效匹配与动态可视化,提升了CME传播过程研究的可视化水平和特征捕捉能力。未来工作将聚焦模型优化与实际应用拓展,进一步提升空间天气灾害预警技术的精度与实用性。Abstract: Coronal Mass Ejection (CME) is a significant phenomenon triggering severe space weather events. Visualizing the dynamic propagation of CMEs aids in deepening the understanding of their physical mechanisms and supports early warning systems. Augmented Reality (AR) technology, by integrating virtual and real environments, offers intuitive visualization of CME propagation characteristics. However, existing image feature extraction and matching algorithms face challenges such as insufficient feature representation and poor performance under noise interference, limiting AR’s effective application in space weather research. To address these issues, this paper proposes a CME image matching algorithm based on a Dual-Domain Attention Enhanced Fusion Network (DDFN). This method fuses the local perception ability of Convolutional Neural Networks (CNN) with the global modeling strength of Vision Transformers (ViT), introducing spatial and channel attention mechanisms to enhance multi-dimensional feature representation. Additionally, it integrates the Simple Contrastive Learning of Representations (SimCLR) framework to improve robustness against noise, illumination changes, and other complex conditions. Experimental results demonstrate that the DDFN achieves Top-1 matching accuracies of 81.76% and 68.44% on original and noise-added datasets, respectively, outperforming current deep learning models. Furthermore, the algorithm is successfully deployed within an AR system, enabling efficient image matching and dynamic visualization of CME propagation. This advancement significantly improves the dynamic visualization level and key feature capture in CME propagation research. Future work will focus on optimizing the model architecture and expanding practical applications to further enhance the accuracy and applicability of space weather disaster early warning technologies.
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Key words:
- Space weather /
- Coronal Mass Ejection /
- Contrast learning /
- Dual-Domain Attention /
- Image matching
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