Figure 9.

Bland-Altman plot comparing thermal imaging (HR${}_{\mathrm{IRT}}$) and photoplethysmography (HR${}_{\mathrm{GT}}$); the plot comprises the data of 16 subjects. The graph shows a bias of −0.25 bpm (solid line) and the 95% limits of agreement range from −7.7 to 7.2 (dashed lines).