PiD, a person identification system using voice and face
USA Patent 5,412,738

The system is organized as a set of non-homogeneous classifiers whose outputs are integrated after a normalization step. In particular, two classifiers based on acoustic features and three based on visual ones provide data for an integration module (see the papers Automatic Person Recognition by Using Acoustic and Geometric Features, R. Brunelli and D. Falavigna, T. Poggio, L. Stringa and Person Recognition Using Multiple Cues, R. Brunelli and D. Falavigna). The system is also able to reject a stranger: its strictness can be tuned to the application requirements.

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