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Detail
Journal Article
Robust Multithreaded Object Tracker through Occlusions for Spatial Augmented Reality
- Authors
- Ahyun Lee, Insung Jang
- Issue Date
- 2018-04
- Citation
- ETRI Journal, v.40, no.2, pp.246-256
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Project Code
- 17GH1500, Advancement of Spatial open platform architectrue and software, Jang In Sung
- Abstract
- A spatial augmented reality (SAR) system enables a virtual image to be projected onto the surface of a real-world object and the user to intuitively control the image using a tangible interface. However, occlusions frequently occur, such as a sudden change in the lighting environment or the generation of obstacles. We propose a robust object tracker based on a multithreaded system, which can track an object robustly through occlusions. Our multithreaded tracker is divided into two threads: the detection thread detects distinctive features in a frame-to-frame manner, and the tracking thread tracks features periodically using an optical-flow-based tracking method. Consequently, although the speed of the detection thread is considerably slow, we achieve real-time performance owing to the multithreaded configuration. Moreover, the proposed outlier filtering automatically updates a random sample consensus distance threshold for eliminating outliers according to environmental changes. Experimental results show that our approach tracks an object robustly in real-time in an SAR environment where there are frequent occlusions occurring from augmented projection images.
- KSP Keywords
- Augmented reality(AR), Distance Threshold, Distinctive features, Environmental change, Flow-based, Lighting environment, Optical Flow, Random sample consensus, Real-time performance, Real-world, Spatial augmented reality
This work is distributed under the term of Korea Open Government License (KOGL)
(Type 4: : Type 1 + Commercial Use Prohibition+Change Prohibition)
(Type 4: : Type 1 + Commercial Use Prohibition+Change Prohibition)
