A method for contact-free heart rate measurement on a video sequence using Simulink

This paper presents a method for a contact-free heart rate measurement on a video sequence using Simulink. The heart rate is measured by detecting the prominent frequency of the skin-color change in a human face. As color features in a video sequence, we utilize both green and hue signals. The frequencies of the two color signals are analyzed using multiple observing times. The prominences of the Fourier spectrums of the two color signals at multiple observing times are then evaluated statistically. Finally, the heart rate measurement is conducted based on the most distinct spectrum. Experimental results show that the proposed method can perform heart rate measurement accurately in real time.