Fig. 5
From: Camera-based photoplethysmography in an intraoperative setting
Selected ROIs for six different patients. The first two columns show the ROIs (only contour) for the RGB and NIR image at the beginning of the recording, the last two columns at a later point. If there was minor or no movement, the results in column 1 and 2 are similar to those in 3 and 4. Please note that in case the patient was identifiable, the eye section in the depicted images was blurred