Simplified 3D Hologram Heart Activity Monitoring Using a Smartphone

In this paper, we use smartphone´s built-in camera with flash light to obtain the pulsatile signal from fingertip and then apply the peak detection algorithm to detect the pulse´s peaks and after that calculate the R-R interval (RRI) in real time. We design the animated heart images that beat according to each RRI of the pulsatile signal. At the same time, we make a simple pyramid hologram from a transparent film to show the beating heart above the smartphone screen in three-dimensional view. By doing this, people can actually see their heart is beating artificially rather than to see the pulsatile signal graphically.