Walid Karam

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The BioSecure Network of Excellence 1 has collected a large multi-biometric publicly available database and organized the BioSecure Multimodal Evaluation Campaigns (BMEC) in 2007 2. This paper reports on the Talking Faces campaign. Open source reference systems were made available to participants and four laboratories submitted executable code to the(More)
The robustness of a biometric identity verification (IV) system is best evaluated by monitoring its behavior under impostor attacks. Such attacks may include the transformation of one, many, or all of the biometric modalities. In this paper, we present the transformation of both speech and visual appearance of a speaker and evaluate its effects on the IV(More)
With the start of the appearance of PDA's, handheld PC's, and mobile telephones that use biometric recognition for user authentication, there is higher demand for automatic non-intrusive voice and face speaker verification systems. Such systems can be embedded in mobile devices to allow biometrically recognized users to sign and send data electronically,(More)
Virtual worlds are developing rapidly over the internet. They are visited by avatars and staffed with Embodied Conversational Agents (ECAs). An avatar is a representation of a physical person. Each person controls one or several avatars and usually receives feedback from the virtual world on an audiovisual display. Ideally, all senses should be used to feel(More)
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