Coverage-Aware Virtual IMU Augmentation for Low-Resource Human Activity Recognition

Jiayuan Gao, Yingwei Zhang, Ziyao Tang, Yuejia Ma, Yuanzhe Chen, Shuchao Song, Boshi Tang (ICT CAS et al.)

Summary

Selects diversity + scarcity anchors in a seed IMU embedding space, builds tempo/intensity/periodicity prompts, generates virtual IMU candidates (IMUGPT pipeline), ranks by anchor proximity + label consistency, trains HAR with reliability weights. Beats Real-only / Trad.Aug / TimeGAN / Diffusion-TS / IMUGPT on USC-HAD, PAMAP2, RealWorld under low-label LOSO; exploratory PADS PD-vs-HC gains.