Figure 4
From: Synthetic photoplethysmogram generation using two Gaussian functions
Comparisons of synthetic PPGs with different noises. (a) Three different low-frequency noise levels were added. The amplitudes of noise signals are 0.3, 0.4 and 0.1, and the frequencies are 0.3 Hz, 0.2 Hz and 0.9 Hz, respectively.(b) Five different high-frequency noise signals were added. The amplitudes of noise signals are 0.1, 0.03, 0.05, 0.04 and 0.05, and the frequencies are 50 Hz, 60 Hz, 70 Hz, 90 Hz and 100 Hz, respectively. (c) Five different noise signals were added. The amplitudes of noise signals are 0.4, 0.2, 0.3, 0.02 and 0.04, and the frequencies are 0.1 Hz, 0.7 Hz, 0.5 Hz, 70 Hz and 90 Hz, respectively. The blue part in (b) is the systolic wave and the red part is the diastolic wave. This figure shows that the synthetic PPG generated by the proposed model is similar to the real PPG in the MIMIC III database.
