SIGGRAPH 2004 - The 31st international conference on computer graphics and interactive techniques
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Lumisight Table: Interactive View-Dependent Display Table Surrounded by Multiple Users

Lumisight Table is a novel interactive table display that can display information in each required direction on a shared screen and capture multiple users' gestures simultaneously.

Life Enhancement
When you use a computer, your eyes are focused on a display, and your hands are restricted to a keyboard or mouse device. This is bad for communication and collaboration. In collaboration, nonverbal communication modalities, such as eye contact, facial expressions, and the handling of physical objects, are just as important as the verbal modality. With Lumisight Table, you can stay close enough to maintain nonverbal communication and collaborate while using computers, since its display is physically single but visually multiple. This feature could improve human relationships and enhance the efficiency of cooperative work.

Lumisight Table could improve the efficiency of some applications in computer-supported cooperative work because it optimizes the direction of projected information to each user around the table. Users can see mixed and integrated displays of public and private information on a single screen.

Lumisight Table could also open up new kinds of video games, including poker and mahjong. For example, you can use physical chess pieces while Lumisight Table acts like a computerized chess board on which you can see both a shared public game board and some unique private hints. Gaming is one of the attractive applications for Lumisight Table.

The system also presents interesting possibilities in networked applications and artistic creation and interaction.

The goal of this project is to provide a versatile platform for various interactive applications among multiple users. This goal is supported by three specific objectives:

1. To develop an interactive display system that allows users to stay close enough to maintain verbal and nonverbal communication while they are viewing their own computer output. The. horizontal table-type display is physically single but visually multiple.

2. To achieve appropriate input methods for this kind of display medium. Computers can be controlled by hand gestures or by placing physical objects on the display.

3. To develop attractive and specialized applications for the Lumisight Table, including games and computer-supported cooperative work. These applications could usher in a new paradigm of human-computer interaction.

Lumisight Table offers four core technical innovations:

1. Optical design of a special screen system composed of a building material called Lumisty film and a Fresnel lens. The system combines these films and lenses with projectors and cameras to display four different images, one for each user's view.

2. A method for adjusting four different projector images on a single screen. The software approach adjusts four projector images geometrically on the screen. With this method, four projectors can project identical portions of images onto identical positions on the screens.

3. A method for capturing the appearance of the tabletop from inside the system.

4. A method for mixed and integrated display of public and private information on a single screen. This new paradigm in human-computer interaction supports interaction between users and their graphical user interfaces..

Tuesday, 10 August
8:30 - 10:15 am
Room 404AB

Yasuaki Kakehi
The University of Tokyo

Makoto Iida
Takeshi Naemura
The University of Tokyo

Mitsunori Matsushita
Takeshi Ohguro
Yoshinari Shirai
NTT Communication Science Laboratories, NTT Corporation

emerging technologies jury and committee
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Conference 8-12 August, Exhibition 10-12 August.  In Los Angeles, CA