[Paper] MRsionCase: A Glasses-free Mixed Reality Showcase for Surrounding Multiple Viewers

Abstract

Several mixed reality (MR) showcases have recently been proposed to augment physical exhibits with visual images. However, most of these showcases require viewers to wear a special device to see the superimposed images. In this article, we propose a device-free MR showcase that overcomes such limitations. Our MRsionCase provides spatially consistent visual and auditory information along with physical exhibits. A novel imaging optical device called dihedral corner reflector array is used to place mid-air images inside the showcase along with physical exhibits. Hyper directional loudspeakers provide a localized audio guide. The symmetric design of MRsionCase enables the exhibit to be viewed from any horizontal direction. MRsionCase provides information targeted at different groups of viewers through sound separation. Results of a user survey demonstrated the effectiveness of MRsionCase as an advanced MR showcase.