Yoshinari Shirai

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The goal of our research is to support cooperative work performed by stakeholders sitting around a table. To support such cooperation, various table-based systems with a shared electronic display on the tabletop have been developed. These systems, however, suffer the common problem of not recognizing shared information such as text and images equally(More)
A novel tabletop display provides different images to different users surrounding the system. It can also capture users' gestures and physical objects on the tabletop. The Lumisight Table approach is based on the optical design of a special screen system composed of a building material called Lumisty and a Fresnel lens. The system combines these films and a(More)
69 M ost of us have created Web content using only human-friendly information. Of course, this makes sense—after all, humans are the intended users of the information. However, with the continuing explosion of Web content—especially multimedia content—we argue that contents should be created in a more machinefriendly format—one that lets machines better(More)
We propose a novel video mediation method that immerses remote users in a virtual shared space. In the implemented system using this method, video cameras and screens surround users, and on the screens placed behind them remote users and physical or virtual objects are all shown in life-size. Unlike conventional video conferencing systems, the method can(More)
In this paper we propose a tool called FaintPop. It is a media designed for a community, with which the sense of connectedness can be shared among members. It is intended to be an alternative media that is suitable for very light-weight, acknowledge-only mode of communication. Furthermore, it provides the general overview of the communication activities in(More)
Lumisight Table is not just an interactive display technology. Now, you have a new canvas. You can display anything, and design new interactive applications on it. The possibilities are unlimited: entertainment, computer supported cooperative work, networked applications, and media art works. In order to realize Lumasight Table, we will implement an(More)
In this study, we examine how remote collaborators' upper body view affects collaboration when people engage in multiparty fluid tabletop activities across distances. We experimentally investigated the effects of upper body view on four-person group tabletop collaboration, two-by-two at identical locations: shared tabletop vs. shared tabletop plus upper(More)
In this paper, we present t-Room, the next generation video communication system we are developing. Our approach is to build rooms with identical layouts, including walls of display panels on which users and physical or virtual objects are all shown at life-size. In this way, the user space enclosed by t-Room’s surrounding displays can be shared as a common(More)
Browsing Web pages, which plays an important part of our daily creative knowledge work, often includes purposefully revisiting pages we have browsed before. Many of the existing tools and approaches for revisitation clearly distinguish the use of history from Web browsing. The approach presented in this paper blurs the distinction between browsing the Web(More)