Readings in computer vision: issues, problems, principles, and paradigms
Multiple view geometry in computer visiond
Multiple view geometry in computer visiond
Orientation Tracking for Outdoor Augmented Reality Registration
IEEE Computer Graphics and Applications
The MagicBookMoving Seamlessly between Reality and Virtuality
IEEE Computer Graphics and Applications
Recent Advances in Augmented Reality
IEEE Computer Graphics and Applications
Hybrid Inertial and Vision Tracking for Augmented Reality Registration
VR '99 Proceedings of the IEEE Virtual Reality
Marker Tracking and HMD Calibration for a Video-Based Augmented Reality Conferencing System
IWAR '99 Proceedings of the 2nd IEEE and ACM International Workshop on Augmented Reality
Vision-Based Pose Computation: Robust and Accurate Augmented Reality Tracking
IWAR '99 Proceedings of the 2nd IEEE and ACM International Workshop on Augmented Reality
Micro-Accelerometer Based Hardware Interfaces for Wearable Computer Mixed Reality Applications
ISWC '02 Proceedings of the 6th IEEE International Symposium on Wearable Computers
A Hybrid Registration Method for Outdoor Augmented Reality
ISAR '01 Proceedings of the IEEE and ACM International Symposium on Augmented Reality (ISAR'01)
Natural feature tracking for augmented reality
IEEE Transactions on Multimedia
Pervasive games: bringing computer entertainment back to the real world
Computers in Entertainment (CIE) - Theoretical and Practical Computer Applications in Entertainment
Meeting technology challenges of pervasive augmented reality games
NetGames '06 Proceedings of 5th ACM SIGCOMM workshop on Network and system support for games
NEAT-o-Games: blending physical activity and fun in the daily routine
Computers in Entertainment (CIE) - Theoretical and Practical Computer Applications in Entertainment
A critical evaluation of location based services and their potential
Journal of Location Based Services
Viewpoint stabilization for live collaborative video augmentations
ISMAR '06 Proceedings of the 5th IEEE and ACM International Symposium on Mixed and Augmented Reality
Hearing is believing: evaluating ambient audio for location-based games
Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology
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Despite the increasing sophistication of augmented reality (AR) tracking technology, tracking in unprepared environments still remains an enormous challenge according to a recent survey. Most current systems are based on a calculation of the optical flow between the current and previous frames to adjust the label position. Here we present two alternative algorithms based on geometrical image constraints. The first is based on epipolar geometry and provides a general description of the constraints on image flow between two static scenes. The second is based on the calculation of a homography relationship between the current frame and a stored representation of the scene. A homography can exactly describe the image motion when the scene is planar, or when the camera movement is a pure rotation, and provides a good approximation when these conditions are nearly met. We assess all three styles of algorithms with a number of criteria including robustness, speed and accuracy. We demonstrate two real-time AR systems here, which are based on the estimation of homography. One is an outdoor geographical labelling/overlaying system, and the other is an AR Pacman game application.