SnapUnlock: A Contrastive Learning-Based Contactless Authentication via Heterogeneous Sensors

Figure 5

The PSD correlation coefficients between volunteers A and Y in different sessions.

(a) The PSD correlation coefficients of sound between volunteers A and Y

(b) The PSD correlation coefficients of accelerometers in axis between volunteers A and Y

(c) The PSD correlation coefficients of accelerometers in axis between volunteers A and Y

(d) The PSD correlation coefficients of accelerometers in axis between volunteers A and Y