Fig. 8From: Spatio-temporal and -spectral feature maps in photoplethysmography imaging and infrared thermographyThe RMS contrast of the adult measurement using NIR. The contrast for \(ROI_\text {PULSE}\) is typically higher compared to \(ROI_\text {BG}\). As expected, the results are inverted for max frequency. The complete set of feature definitions is given in Section B in the appendix. The location of the ROIs is given in Fig. 11Back to article page