Engineering & Technology
Received: 20 Mar 2018 , Published: 23 April 2018
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This project presents a simple, low-cost method for measuring multiple physiological parameters using a basic webcam. Photoplethysmography (PPG) is a low-cost and non-invasive means of sensing the cardiovascular blood volume pulse (BVP) through variations in transmitted or reflected light sources. By applying independent component analysis on the color channels in video recordings. We extracted the blood volume pulse from the facial regions. Heart rate (HR), respiratory rate, and HR variability (HRV, an index for cardiac autonomic activity) were subsequently quantified and compared to corresponding measurements using Food and Drug Administration- approved sensors. High degrees of agreement were achieved between the measurements across all physiological parameters. This technology has significant potential for advancing personal health care and telemedicine.
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