NDLI: Shape recognition and pose estimation for mobile augmented reality

Content Provider	IEEE Xplore Digital Library
Author	Hagbi, N. Bergig, O. El-Sana, J. Billinghurst, M.
Copyright Year	2009
Description	Author affiliation: The Visual Media Lab, Ben-Gurion University, Israel (Hagbi, N.; Bergig, O.; El-Sana, J.) \|\| The HIT Lab NZ, University of Canterbury, New Zealand (Billinghurst, M.)
Abstract	In this paper we present Nestor, a system for real-time recognition and camera pose estimation from planar shapes. The system allows shapes that carry contextual meanings for humans to be used as Augmented Reality (AR) tracking fiducials. The user can teach the system new shapes at runtime by showing them to the camera. The learned shapes are then maintained by the system in a shape library. Nestor performs shape recognition by analyzing contour structures and generating projective invariant signatures from their concavities. The concavities are further used to extract features for pose estimation and tracking. Pose refinement is carried out by minimizing the reprojection error between sample points on each image contour and its library counterpart. Sample points are matched by evolving an active contour in real time. Our experiments show that the system provides stable and accurate registration, and runs at interactive frame rates on a Nokia N95 mobile phone.
Starting Page	65
Ending Page	71
File Size	6723035
Page Count	7
File Format	PDF
ISBN	9781424453900
DOI	10.1109/ISMAR.2009.5336498
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Shape Augmented reality Cameras Libraries Real time systems Humans Runtime Performance analysis Feature extraction Active contours shape dual perception In-Place Augmented Reality handheld AR shape recognition geometric projective invariance 3D pose estimation vision-based tracking free-hand sketching
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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