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Handling Occlusions for Robust Augmented Reality Systems

EURASIP Journal on Image and Video Processing20102010:146123

https://doi.org/10.1155/2010/146123

  • Received: 31 July 2009
  • Accepted: 31 March 2010
  • Published:

Abstract

In Augmented Reality applications, the human perception is enhanced with computer-generated graphics. These graphics must be exactly registered to real objects in the scene and this requires an effective Augmented Reality system to track the user's viewpoint. In this paper, a robust tracking algorithm based on coded fiducials is presented. Square targets are identified and pose parameters are computed using a hybrid approach based on a direct method combined with the Kalman filter. An important factor for providing a robust Augmented Reality system is the correct handling of targets occlusions by real scene elements. To overcome tracking failure due to occlusions, we extend our method using an optical flow approach to track visible points and maintain virtual graphics overlaying when targets are not identified. Our proposed real-time algorithm is tested with different camera viewpoints under various image conditions and shows to be accurate and robust.

Keywords

  • Kalman Filter
  • Optical Flow
  • Augmented Reality
  • Real Scene
  • Robust Tracking

Publisher note

To access the full article, please see PDF.

Authors’ Affiliations

(1)
IBISC Laboratory, CNRS FRE 3190, University of Evry Val d'Essonne, 40 rue du Pelvoux, 91020 Evry Cedex, France

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