(with Nobuyuki Matsushita at Keio University)
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The HoloWall is a wall-sized computer display that allows users to interact without special pointing devices. The display part consists of a glass wall with rear-projection sheet behind it. A video projector behind the wall displays images on the wall. |
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Inputs are recognized in an interesting way. This is done with infrared (IR) lights (we use an array of IR light-emitting diodes (LEDs)) and a video camera with an IR filter (an optical filter that blocks light less below 840 nm) installed behind the wall. Since the rear-projection panel is semi-opaque and diffusive, the user's shape or any other objects in front of the screen are invisible to the camera. However, when a user moves a finger close enough to the screen (between 0 cm to 30 cm, depending on the threshold value of the recognition software), it reflects IR light and thus becomes visible to the camera. With a simple image processing technique such as frame subtraction, the finger shape can easily be separated from the background. |
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BodyPong: virtual Ping-Pong using body |
Two-handed Interface |
Two-handed Map Navigation |
The Interactive Curtain based on the HoloWall architecture (demonstrated at InterCommunication Center) |
 Public demonstration at SIGGRAPH'98 Enhanced Reality |
HoloWall and HoloTable are now permanently installed at
Sony ExploraScience in Beijing,
China. Please take a look at
here
and
here .