Amplifying the Perception of Upper Body Roll Rotation using Optical Flow

Abstract

Redirection techniques decouple tracked physical motion from virtual motion, allowing for motion amplification. In this paper, we present an experiment to investigate the detection threshold for roll rotation gain. Seated participants actively tilted their upper bodies by five degrees in the roll direction. The results showed that virtual roll rotations could be amplified up to 5.8 times without being perceptible to the participants. The detection threshold was increased by visual stimuli that generated optical flow in the same direction as the VR space rotation.