| 摘要 |
Method for video evaluation of the heart rate and/or respiratory rate of a baby (B), in particular under dim or nocturnal conditions, in a device comprising a video camera (2) and a source of infrared light (3), the method comprising the steps of:
A1- illuminating the baby with the infrared source,
A2- capturing video images of the baby,
B1- determining the position of the baby's head (T) by finding an ellipse forming an outline of the head,
B2- identifying an area of interest (7) centered on a selected ellipse (6),
C- evaluating, by plethysmographic analysis of the area of interest, the heart rate (HR) and/or respiratory rate (RR) of the baby,
and associated system D- identifying a significant movement of the baby, in which case step C- of photoplethysmographic analysis is suspended,
D2 -identifying a return to a stable state where there is no significant movement by the baby, in which case steps B1-B2 are executed once again, step C- of photoplethysmographic analysis being resumed with the new area of interest determined in step B2. |
