Augmenting Text Document by On-Line Learning of Local Arrangement of Keypoints

被引:7
作者
Uchiyama, Hideaki [1 ]
Saito, Hideo [1 ]
机构
[1] Keio Univ, Tokyo 108, Japan
来源
2009 8TH IEEE INTERNATIONAL SYMPOSIUM ON MIXED AND AUGMENTED REALITY - SCIENCE AND TECHNOLOGY | 2009年
关键词
LLAH; on-line learning; pose estimation; paper registration; paper based augmented reality;
D O I
10.1109/ISMAR.2009.5336491
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We propose a technique for text document tracking over a large range of viewpoints. Since the popular SIFT or SURF descriptors typically fail on such documents, our method considers instead local arrangement of keypoints. We extends Locally Likely Arrangement Hashing (LLAH), which is limited to fronto-parallel images: We handle a large range of viewpoints by learning the behavior of keypoint patterns when the camera viewpoint changes. Our method starts tracking a document from a nearly frontal view. Then, it undergoes motion, and new configurations of keypoints appear. The database is incrementally updated to reflect these new observations, allowing the system to detect the document under the new viewpoint. We demonstrate the performance and robustness of our method by comparing it with the original LLAH.
引用
收藏
页码:95 / 98
页数:4
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