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arXiv 2402.00822cs.HCcs.AI
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WiOpen:一种鲁棒的基于Wi-Fi的开集手势识别框架

WiOpen: A Robust Wi-Fi-based Open-set Gesture Recognition Framework

University of Science and Technology of China(中国科学技术大学);Hefei University of Technology(合肥工业大学);Guizhou Normal University(贵州师范大学);The University of Electro-Communications(电气通信大学)

Xiang Zhang, Jingyang Huang, Huan Yan, Peng Zhao, Guohang Zhuang, Zhi Liu, Bin Liu

AI总结:

针对现有Wi-Fi手势识别多为闭集、易误分类未知手势的问题,提出鲁棒开集框架WiOpen,通过CSI比值去噪、不确定性量化网络缓解域偏移,动态定义决策边界实现开集识别,在公开数据集及跨域任务上性能优于现有最优方法。

摘要:

近年来,基于Wi-Fi的手势识别研究受到了越来越多的关注。然而,现有研究大多聚焦于闭集范式,即所有测试手势均在训练阶段预先定义。这一设定在实际应用中存在显著局限:测试阶段出现的未知手势可能会被错误分类为已知类别。为解决该问题,我们提出WiOpen——一种鲁棒的基于Wi-Fi的开集手势识别(Open-Set Gesture Recognition, OSGR)框架。实现OSGR需要应对Wi-Fi感知中特有的不确定性带来的挑战:这种由噪声和域差异导致的不确定性,会使采集到的Wi-Fi感知数据呈现出分布分散且不规则的特点,进而引发类间数据模糊问题,同时也为定义可识别未知类别的合理决策边界带来困难。针对上述挑战,WiOpen采用双重策略消除不确定性并定义精准决策边界:首先在数据预处理阶段利用CSI(信道状态信息)比值解决噪声引发的不确定性;随后基于不确定性量化方法设计OSGR网络,该网络在学习过程中可有效缓解域差异带来的不确定性,最终利用样本邻域间的关系动态定义开集决策边界,成功实现OSGR。在公开数据集上开展的综合实验验证了WiOpen的有效性,值得注意的是,与现有最优方法相比,WiOpen在跨域任务中同样表现出优越性能。

英文摘要:

Recent years have witnessed a growing interest in Wi-Fi-based gesture recognition. However, existing works have predominantly focused on closed-set paradigms, where all testing gestures are predefined during training. This poses a significant challenge in real-world applications, as unseen gestures might be misclassified as known classes during testing. To address this issue, we propose WiOpen, a robust Wi-Fi-based Open-Set Gesture Recognition (OSGR) framework. Implementing OSGR requires addressing challenges caused by the unique uncertainty in Wi-Fi sensing. This uncertainty, resulting from noise and domains, leads to widely scattered and irregular data distributions in collected Wi-Fi sensing data. Consequently, data ambiguity between classes and challenges in defining appropriate decision boundaries to identify unknowns arise. To tackle these challenges, WiOpen adopts a two-fold approach to eliminate uncertainty and define precise decision boundaries. Initially, it addresses uncertainty induced by noise during data preprocessing by utilizing the CSI ratio. Next, it designs the OSGR network based on an uncertainty quantification method. Throughout the learning process, this network effectively mitigates uncertainty stemming from domains. Ultimately, the network leverages relationships among samples' neighbors to dynamically define open-set decision boundaries, successfully realizing OSGR. Comprehensive experiments on publicly accessible datasets confirm WiOpen's effectiveness. Notably, WiOpen also demonstrates superiority in cross-domain tasks when compared to state-of-the-art approaches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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