Computer Vision: Three-Dimensional Data from Images
Computer Vision: Three-Dimensional Data from Images
Fully Automated and Stable Registration for Augmented Reality Applications
ISMAR '03 Proceedings of the 2nd IEEE/ACM International Symposium on Mixed and Augmented Reality
Combining Edge and Texture Information for Real-Time Accurate 3D Camera Tracking
ISMAR '04 Proceedings of the 3rd IEEE/ACM International Symposium on Mixed and Augmented Reality
Estimating the Location of a Camera with Respect to a 3D Model
3DIM '07 Proceedings of the Sixth International Conference on 3-D Digital Imaging and Modeling
Parallel Tracking and Mapping for Small AR Workspaces
ISMAR '07 Proceedings of the 2007 6th IEEE and ACM International Symposium on Mixed and Augmented Reality
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This paper describes an application of augmented reality (AR) techniques to virtual cultural heritage reconstruction on the real sites of defunct constructs. To realize AR-based cultural heritage reconstruction, extrinsic camera parameter estimation is required for geometric registration of real and virtual worlds. To estimate extrinsic camera parameters, we use a pre-constructed feature landmark database of the target environment. Conventionally, a feature landmark database has been constructed in a large-scale environment using a structure -from-motion technique for omnidirectional image sequences. However, the accuracy of estimated camera parameters is insufficient for specific applications like AR-based cultural heritage reconstruction, which needs to overlay CG objects at the position close to the user's viewpoint. This is due to the difficulty in compensation of the appearance change of close landmarks only from the sparse 3-D information obtained by structure-from-motion. In this paper, visual patterns of landmarks are compensated for by considering local shapes obtained by omnidirectional range finder to find corresponding landmarks existing close to the user. By using these landmarks with local shapes, accurate geometric registration is achieved for AR sightseeing in historic sites.