Contactless Real-Time Vital Signs Monitoring Using a Webcam

Abstract

Measurement of vital signs such as heart rate (HR), respiratory rate (RR), blood pressure (BP), and oxygen saturation (SpO2) is important for everyone in recent years due to the spread of epidemic diseases such as SARS and Coronavirus disease-19. This study presents methods to measure the four vital signs (HR, RR, BP, and SpO2) simultaneously, contactless, and in real-time from facial video using a webcam. The estimation of the four vital signs in our study is based on photoplethysmography (PPG) extracted from the skin. There are many studies that dealt with the measurement of vital signs from PPG, but our study was distinguished from them by estimating and monitoring the four vital signs together in real-time and in less initial time takes 6 s only with good results where the maximum error is: ±4, ±2.2, ±3, ±1, and ±2 for HR, RR, systolic BP (SP), diastolic BP (DP), and SpO2, respectively.