Fig. 4
From: A Structural Vibration-based Dataset for Human Gait Recognition

(a) Empty wooden floor room, (b) Participant walking in front of the sensor during data collection, (c) Raw noise signal acquired from the geophone sensor, (d) Raw vibration signal recorded during a participant’s walk, (e) Continuous Wavelet Transform (CWT) of the noise signal, (f) CWT of the walking signal, highlighting the transformed features.