On-line document registering and retrieving system for AR annotation overlay
Proceedings of the 1st Augmented Human International Conference
onNote: playing printed music scores as a musical instrument
Proceedings of the 24th annual ACM symposium on User interface software and technology
Hybrid document matching method for page identification of digilog books
Transactions on Edutainment VIII
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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.