Fig. 1: Agreement between the reference heart rate values (computed from the ECG and PPG) and the camera estimates for the valid video camera data, comprising a total estimated time of approximately 103.0 h.
From: Non-contact physiological monitoring of post-operative patients in the intensive care unit
a The differences between the camera and reference monitors are normally distributed. b The Bland-Altman plot presents a minimal sensor bias. c The scatter plot shows high correlation between the two devices, with a Pearson correlation coefficient of 0.98. d The distribution of the mean values shows that most of the heart rate estimates are within the expected physiological range for adults.
