Vasomotor assessment by camera-based photoplethysmography

Abstract

Camera-based photoplethysmography (cbPPG) is a novel technique that allows the contactless acquisition of cardio-respiratory signals. Previous works on cbPPG most often focused on heart rate extraction. This contribution is directed at the assessment of vasomotor activity by means of cameras. In an experimental study, we show that vasodilation and vasoconstriction both lead to significant changes in cbPPG signals. Our findings underline the potential of cbPPG to monitor vasomotor functions in real-life applications.

Keywords

• camera-based photoplethysmography
• cold face test
• contactless monitoring
• photoplethysmography imaging
• PPG
• vasoconstriction
• vasodilation