Figure 5
From: Detection of a and b waves in the acceleration photoplethysmogram
Demonstrating the effectiveness of using two moving averages to detect a and b waves. (a) Two beats APG signal; (b) generating blocks of interest after using two moving averages: the dotted black line is the first moving average MApeak and the solid green line is the second moving average MAbeat; and (c) the detected a and b waves after applying the thresholds. Here, ‘red asterisk’ represents the detected a wave and ‘black plus sign’ represents the detected b wave by the proposed algorithm.