Fig. 7
From: Video based heart rate detection in unrestrained laboratory rats: a feasibility analysis
The frequency power spectrum of ECG and rPPG, and a segment of the respective signals in time domain. (A) The frequency power spectrum of ECG and rPPG. The plotted line indicates the frequencies with highest power within a timestep. HR of ECG: 355 bpm ± 1.5 bpm, HR of rPPG: 361 bpm ± 7 bpm (Mean and standard deviation). The rPPG signal is displayed in Fig. 6D. It should be noted that the last part of the spectrum, where the noise content is higher, originated from the last signal part, where the tracker failed. (B) A segment of the respective signals: ECG is scaled to rPPG, green dots indicate matching peaks within 0.05s tolerance.
