Comfort in observing stereoscopic images reduced by vibration stimuli

Abstract

Numerous studies have been conducted to illuminate the effect of image factors to reduce unexpected influence of stereoscopic images on healthy visual experience. In this paper, we introduce changes in the psychological and phy-siological indexes of observers of a stereo-scopic image disturbed by vibration stimuli. Forty-four healthy university students partici-pated in the experiment. A programmable vi-bration table generated two types of vibrations (5 Hz and 20 Hz) and provided intermittent vibra-tion stimuli to a stereoscopic projector installed on a vibration table. Our results showed that the frequency of vibration stimuli has a strong impact in evaluating the local comfort of sub-jects. Our results also showed that the indexes of visual fatigue increased after observation independent of the frequency. The activity status of the autonomic nervous system as a physio-logical index significantly increased after ob-serving 3D images with vibration stimuli al-though the vibrational frequency did not have a significant effect on the activity status.