Abstract
The use of real textures is the optimal way to present realistic textures in a VR (Virtual Reality) experience. However, a system may require the presentation of numerous objects in a VR scene, making the use of real objects impractical. One way to address this issue is to present visual and tactile texture information simultaneously such that multiple different visual textures are associated with one tactile sensation. This tactile sensation must differ from the visual information only to the extent that the user still perceives the stimuli as consistent. This study examines the consistency required for the simultaneous presentation of visual and tactile sensations for the purpose of reducing the number of necessary real textures in future VR systems. An experiment was conducted using one-dimensional textures (i.e., line gratings), in which participants were asked whether the presented visual texture was finer or coarser than the tactile texture. The results suggest that the relative size of the “permissible range” (the range over which the difference between the visual and tactile sensation is not recognized) is correlated with the spatial period of the real texture.
Highlights
In recent years, thanks to the remarkable development of VR technology, it has become possible to provide VR experiences with visual and auditory qualities comparable to reality
“encounter-type tactile presentation” [5,6] is one of the main methods that provides a tactile sensation that matches the user’s experience by moving the object by machine or human power, or arranging a real object at the same coordinates as the object seen in the visual environment
We conducted an experiment to find a permissible range for the discrepancy between tactile and visual perception in the case of one-dimensional grating
Summary
Thanks to the remarkable development of VR technology, it has become possible to provide VR experiences with visual and auditory qualities comparable to reality. Tactile sensation is an important perception for reproducing a realistic environment, an established method of expressing it has not yet been proposed. Many researchers have proposed various tactile expression methods. Proposed methods can be roughly divided into two types. One is a method that simulates tactile sensation by stimulating the tactile receptive field using electrical stimulation [1] or vibration [2], and controlling the force sensation on a pen-shaped device or fingertip like PHANToM [3]. The other is a method that uses the real object. “encounter-type tactile presentation” [5,6] is one of the main methods that provides a tactile sensation that matches the user’s experience by moving the object by machine or human power, or arranging a real object at the same coordinates as the object seen in the visual environment. We focus on the latter type of haptic display
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