Shunsuke Yoshida

fVisiOn: glasses-free tabletop 3D display to provide virtual 3D media naturally alongside real media

A novel glasses-free tabletop 3D display, named fVisiOn, floats virtual 3D objects on an empty, flat, tabletop surface and enables multiple viewers to observe raised 3D images from any angle at 360° Our glasses-free 3D image reproduction method employs a combination of an optical device and an array of projectors and produces continuous horizontal parallax in the direction of a circular path located above the table. The optical device shapes a hollow cone and works as an anisotropic diffuser. The circularly arranged projectors cast numerous rays into the optical device. Each ray represents a particular ray that passes a corresponding point on a virtual objects surface and orients toward a viewing area around the table. At any viewpoint on the ring-shaped viewing area, both eyes collect fractional images from different projectors, and all the viewers around the table can perceive the scene as 3D from their perspectives because the images include binocular disparity. The entire principle is installed beneath the table, so the tabletop area remains clear. No ordinary tabletop activities are disturbed. Many people can naturally share the 3D images displayed together with real objects on the table. In our latest prototype, we employed a handmade optical device and an array of over 100 tiny projectors. This configuration reproduces static and animated 3D scenes for a 130° viewing area and allows 5-cm-tall virtual characters to play soccer and dance on the table.

16.1: Prototyping of GlassesFree TableStyle 3D Display for Tabletop Tasks

An autostereoscopic 3D display optimized for tabletop tasks is described. The display employs a conicalshaped optical device and circularly arranged projectors are installed below a table. The resultant display provides a ringshaped viewing area located above the table. Individual 3D images can be observed from any direction with correct perspective.

gCubik: a cubic autostereoscopic display for multiuser interaction: grasp and group-share virtual images

Collaborative tasks requiring the sharing of an object can benefit from a compact, group-shared autostereoscopic display. We have analyzed the requirements for a cubic autostereoscopic display employing integral photography (IP). The display should be compact as well as graspable and viewable from any direction; thus suitable for group discussions. This paper describes the implementation of the gCubik display that realizes our conceptual prototype. We envision the application areas to include games and edutainment.

fVisiOn: 360-degree viewable glasses-free tabletop 3D display composed of conical screen and modular projector arrays.

A novel glasses-free tabletop 3D display to float virtual objects on a flat tabletop surface is proposed. This method employs circularly arranged projectors and a conical rear-projection screen that serves as an anisotropic diffuser. Its practical implementation installs them beneath a round table and produces horizontal parallax in a circumferential direction without the use of high speed or a moving apparatus. Our prototype can display full-color, 5-cm-tall 3D characters on the table. Multiple viewers can share and enjoy its real-time animation from any angle of 360 degrees with appropriate perspectives as if the animated figures were present.

fVisiOn: interactive glasses-free tabletop 3D images floated by conical screen and modular projector arrays

fVisiOn floats glasses-free 3D images on an empty, flat tabletop surface. A combination of a conical screen and circularly arranged projectors underneath the table reproduces a 3D shape light field. Multiple viewers can share the experience and enjoy full-color, 5-cm-tall characters dancing on the table.

Implementations toward interactive glasses-free tabletop 3D display

classroom use is granted without fee provided that copies are not made or distributed for commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author. SIGGRAPH 2014, August 10 – 14, 2014, Vancouver, British Columbia, Canada. 2014 Copyright held by the Owner/Author. ACM 978-1-4503-2958-3/14/08 Implementations toward Interactive Glasses-free Tabletop 3D Display

Encouraging People to Interact with Interactive Systems in Public Spaces by Managing Lines of Participants

To attract visitors and encourage them to interact with interactive systems such as digital exhibitions, digital public art, and digital signage in public spaces, this paper proposes a method to not only attract passersby’s attention but also maintain their attention until they interact with them by managing the situation in which someone is experiencing it and several people are forming a line. Our proposed method changes the experience time of the interactive system based on the presence of people interacting with the system. The experiments, held in real public spaces, showed that the proposed method counteracted the negative effect of crowded situations (which resulted from attracting many passersby), and increased the number of people who interacted with the system.

fVisiOn: Glasses-free tabletop 3D display that provides virtual 3D images on a flat tabletop surface

Tables are widely used for various activities. We can share and exchange such media as documents or photos on their surfaces. fVisiOn, our proposed novel glasses-free tabletop 3D display, is designed to be a communication tool to augment ordinary tabletop activities by naturally providing virtual 3D media alongside actual media. This paper introduces the basic idea of our proposed method and recent improvements.

Analysis of resolution limitation of a glasses-free tabletop 3D display

In this research we investigate the maximum displayable angular resolutions in the horizontal and vertical directions of a planar 3-D object displayed by a glasses-free tabletop 3-D display that is using a conic-shaped optical device and an array of projectors. We estimate initially the resolutions of the (1) slit-like views corresponding to each projectors image and then continue with the resolution for the (2) final 3-D image obtained after the integration of the slits. Our experimental results represent a first attempt in estimating the differences between these resolutions that can benefit (1) future tunings of the tabletop 3-D display as well as (2) optimization of the displaying process.

A Basic Study of Sensory Characteristics toward Interaction with a Box-Shaped Interface

Our research focuses on the sensory characteristics of interacting with a novel box-shaped interface device for facilitating transfer of a digital object to another person. Such findings are important for constructing an ultra-realistic communication system with shared reality. This paper presents two kinds of pilot studies: (I) graspability of a box-shaped interface device through controlling feedback timing from the device, and (II) the sense of possessing a modality in information transfer between two devices. Both psychological and behavioral evaluation results suggest that graspability increases more from feedback of the device just after grasping it than from that just before grasping it. Furthermore, psychological evaluation results suggest that a touch-and-move method, i.e., the receiver of feedback changes precisely from one user to the other after touching the two devices, increases the sense of possessing a modality more than does a touch-and-copy method, i.e., both users simultaneously receive feedback after touching.