A. Ladikos, S. Benhimane, N. Navab A Real-Time Tracking System Combining Template-Based and Feature-Based Approaches International Conference on Computer Vision Theory and Applications, Barcelona, Spain, March 2007. (bib)
	In this paper we propose a complete real-time model-based tracking system for piecewise-planar objects which combines template-based and feature-based approaches. Our contributions are an extension to the ESM algorithm used for template-based tracking and the formulation of a feature-based tracking approach, which is specifically tailored for use in a real-time setting. In order to cope with highly dynamic scenarios, such as illumination changes, partial occlusions and fast object movement, the system adaptively switches between the template-based tracking, the feature-based tracking and a global initialization phase. Our tracking system achieves real-time performance by applying a coarse-to-fine optimization approach and includes means to detect a loss of track.
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