Abstract
The following paper proposes a novel procedure for liveness verification in video authentication systems. Decision on granting or denying access to the system is based on visual information only. System prompts random sequences of predefined syllables in which isolated visems are to be recognized. Features that represent outer lip contour are extracted on the basis of dynamic programming and B-spline approximation. Experiments for Polish language utterances show that seven classes of visems can be recognized with 76% of efficiency. Average false acceptance rate for liveness does not exceeds 9% and false rejection rate 7%. © 2012 Springer-Verlag.
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CITATION STYLE
Owczarek, A., & Ślot, K. (2012). Lipreading procedure for liveness verification in video authentication systems. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 7208 LNAI, pp. 115–124). https://doi.org/10.1007/978-3-642-28942-2_11
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