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Feature extracted from the VPG signal.
| Features | Definition |
|---|---|
|
| |
| Peak1 | Power outside spectral peak divided by average power. |
| Peak2 | The ratio between power within the spectral peak and power outside the spectral peak. |
| Peak3 | The ratio between the first peak and the second peak. |
| Face misdetection ratio | Ratio of frames with a face in them. |
| Face motion indicator | Average motion of the ROI. |
| Average PR from PSD | Peak frequency in the PSD |
