GraSens: A Gabor Residual Anti-aliasing Sensing Framework for Action Recognition using WiFi

计算机科学 残余物 混叠 人工智能 无线 块(置换群论) Gabor变换 动作识别 模式识别(心理学) 计算机视觉 时频分析 电信 欠采样 滤波器(信号处理) 几何学 数学 算法 班级(哲学)
作者
Yong Hao,Zhiyuan Shi,Xidong Mu,Yuanwei Liu
标识
DOI:10.1109/icpr56361.2022.9956179
摘要

WiFi-based human action recognition (HAR) has been regarded as a promising solution in applications such as smart living and remote monitoring due to the pervasive and unobtrusive nature of WiFi signals. However, the efficacy of WiFi signals is prone to be influenced by the change in the ambient environment and varies over different sub-carriers. To remedy this issue, we propose an end-to-end Gabor residual anti-aliasing sensing network (GraSens) to directly recognize the actions using the WiFi signals from the wireless devices in diverse scenarios. In particular, a new Gabor residual block is designed to address the impact of the changing surrounding environment with a focus on learning reliable and robust temporal-frequency representations of WiFi signals. In each block, the Gabor layer is integrated with the anti-aliasing layer in a residual manner to gain the shift-invariant features. Furthermore, fractal temporal and frequency self-attention are proposed in a joint effort to explicitly concentrate on the efficacy of WiFi signals and thus enhance the quality of output features scattered in different subcarriers. Experimental results throughout our wireless-vision action recognition dataset (WVAR) and three public datasets demonstrate that our proposed GraSens scheme outperforms state-of-the-art methods with respect to recognition accuracy.
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