Affordable system for measuring motion-to-photon latency of virtual reality in mobile devices

Recently, virtual reality on the mobile phone is getting more and more popular. In virtual reality, motion-to-photon latency is a very important element which causes simulator sickness. In this paper, we construct a low-cost system with high accuracy which can precisely measure the latency of virtual reality (VR) in the mobile device. There is no convenient way to measure the latency on mobile devices these years. So we provide a simple method to calculate the latency.