Abstract
This paper presents visually enhanced sports entertainment applications: AR Baseball Presentation System and Interactive AR Bowling System. We utilize vision-based augmented reality for getting immersive feeling. First application is an observation system of a virtual baseball game on the tabletop. 3D virtual players are playing a game on a real baseball field model, so that users can observe the game from favorite view points through a handheld monitor with a web camera. Second application is a bowling system which allows users to roll a real ball down a real bowling lane model on the tabletop and knock down virtual pins. The users watch the virtual pins through the monitor. The lane and the ball are also tracked by vision-based tracking. In those applications, we utilize multiple 2D markers distributed at arbitrary positions and directions. Even though the geometrical relationship among the markers is unknown, we can track the camera in very wide area.
Highlights
Augmented reality (AR) is a technique for overlaying virtual objects onto the real world
AR can provide users with immersive feeling by allowing the interaction between the real and virtual world. In these kinds of AR entertainment applications, virtual objects generated with computer graphics are overlaid onto the real world. This means that the real 3D world is captured by a camera and the virtual objects are superimposed onto the captured images
The user can watch the game from the favorite view point by just moving around the field model. Such simple way for watching the CG-represented event using the AR system provides more immersive feeling than using usual CG viewers, in which a mouse or a keyboard is used for changing view points [21]
Summary
Augmented reality (AR) is a technique for overlaying virtual objects onto the real world. AR can provide users with immersive feeling by allowing the interaction between the real and virtual world In these kinds of AR entertainment applications, virtual objects (world) generated with computer graphics are overlaid onto the real world. The pose and the position of the moving user’s camera should be obtained so that the virtual objects can be appeared at correct position in the real world captured with the camera Such camera tracking should be performed in real time for interactive operations of the AR applications. Users place a real baseball field model on the tabletop and input a baseball game history (scorebook) that they want to watch into the system. With interactive AR Bowling System, users can enjoy the bowling game by rolling a real ball down a real bowling lane model placed on a tabletop in the real world. These applications are based on the multiple marker-based online AR system [9]
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