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\bibitem{715} Bogdan Raducanu, \& Jordi Vitria. (2006). A Robust Particle Filter-Based Face Tracker Using Combination of Color and Geometric Information. In \textit{International Conference on Image Analysis and Recognition (ICIAR{\textasciiacute}06), LNCS 4141 (A. Campilho et al., eds.), 1: 922{\textendash}933}.

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