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Auflistung nach Autor:in "Ioannidis, Dimos"

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  • Konferenzbeitrag
    Activity related biometrics based on motion trajectories
    (BIOSIG 2010: Biometrics and Electronic Signatures. Proceedings of the Special Interest Group on Biometrics and Electronic Signatures, 2010) Drosou, Anastasios; Moustakas, Konstantinos; Ioannidis, Dimos; Tzovaras, Dimitrios
    The current paper contributes to the concept of activity-related biometric authentication in ambient Intelligence environments. The motivation behind the proposed approach derives from activity-related biometrics and is mainly focusing on everyday activities. The activity sequence is captured by a stereoscopic camera and the resulting 2.5D data are processed to extract valuable unobtrusive activity-related features. The novel contribution of the current work lies in the warping of the extracted movements trajectories, so as to compensate for different environmental settings. Au- thentication is performed utilizing both HMM and GMMs. The authentication results performed on a database with 32 subjects show that the current work outperforms existing approaches especially in the case of non-interaction restricting scenarios.
  • Konferenzbeitrag
    Group identification at border crossing points
    (BIOSIG 2011 – Proceedings of the Biometrics Special Interest Group, 2011) Yildirim Yayilgan, Sule; Hovstø, Asbjørn; Cheikh, Alaya; Amodei, Anthony; Iori, Marc; Zaharia, Sandel; Ioannidis, Dimos; Thorvaldsen, Øystein
    Increasing Passenger flow at Border Crossing Points is an important issue at today's border crossing points (BCPs) of land, sea and airport. Group Access Control and utilizing biometrics information will help increase passenger throughput and reduce human error in handling passengers erroneously. Using multi modal information for (biometric) group id can provide more robust handling of passengers. On the other hand, connecting various BCPs will help solve some problems related to illegal entries from non-Schengen to Schengen space, laws and health. This paper presents the first relevant concepts and issues of using (biometric) group idea and connecting BCPs.