| abstract |
A system, particularly a photo-plethysmographic system, determines vital sign information of a subject. A marker includes a marker area such as fluorescent or luminescent pigments, that emits light towards a skin of the subject. Light reflected by the skin is encoded with information about blood in the skin. An attachment layer attaches the marker to the subject. A detector, such as an optical camera, detects radiation reflected from the skin of the subject, and an analysis processor determines the vital sign information, such as heart rate and blood oxygen (SpO 2 ), of the subject from the detected radiation reflected from the skin of the subject. |