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Non-contact measurement of emotional and physiological changes in heart rate from a webcam
Heart rate, measured in beats per minute (BPM), can be used as an index of an individual's physiological state. Each time the heart beats, blood is expelled and travels through the body. This blood flow can be detected in the face using a standard webcam that is able to pick up subtle changes in color that cannot be seen by the naked eye. Due to the light absorption spectrum of blood, we are able to detect differences in the amount of light absorbed by the blood traveling just below the skindoi:10.1101/179812 fatcat:lwfq5xfbcvaf3gej3fchk3bsoa