Research & experiment
Browser-based photoplethysmography
Photoplethysmography (PPG) is a method to measure heart rate, and possible other physiological observables by observing tiny, periodic changes in the optical properties of the skin. The measurement can be performed using dedicated instruments but, perhaps surprisingly, it is also possible to do it using ordinary consumer equipment like a phone camera or webcam. When the instrument does not touch the skin, the method is often called remote photoplethysmography, abbreviated rPPG.
Technically, this is not "artificial intelligence" but, well, it can be called "AI-adjacent": the process involves some non-trivial signal processing to extract signals that may characterize a patient's heart rate and, possibly, their respiratory rate.
Our RPPG demo implementation was primarily intended to dispel myths: though the mathematics is not entirely trivial, it is also not terribly complex. Moreover, modern browsers already offer features that make it possible, almost trivially easy, to monitor a "live" video capture feed of the participating patient, and extract the necessary information.