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Auflistung nach Autor:in "Wieneke, Monika"

1 - 3 von 3
  • Konferenzbeitrag
    Localization of radioactive source carriers in person streams
    (INFORMATIK 2010. Service Science – Neue Perspektiven für die Informatik. Band 2, 2010) Wieneke, Monika
    The localization and tracking of radioactive sources in public facilities like airports or stations is a problem of highest security relevance. The accumulation and the severity of terrorist attacks during the past decade give reason to the assumption that future attacks could also involve radioactive material packaged with conventional explosives. The only way to avoid such kind of attacks is to localize and arrest the person carrying the material to its destination. But since radiation is not perceivable by human beings, the security guards are largely dependent on technical decision support to perform this task. We consider a security assistance system comprising three gamma scintillation detectors that are distributed along a corridor wall to check passing people for radioactive material. Furthermore, the system consists of a set of tracking sensors simultaneously providing the positions of all persons during their walk through the corridor. In this paper we propose and evaluate techniques to estimate the assignment of radioactive detections to person tracks. These techniques provide a measure for each person reflecting the probability that the person is a radioactive source carrier.
  • Konferenzbeitrag
    The PMHT: solutions for some of its problems
    (INFORMATIK 2006 – Informatik für Menschen, Band 1, 2006) Wieneke, Monika; Koch, Wolfgang
    Tracking multiple targets in a cluttered environment is a challenging task. The Probabilistic Multi-Hypothesis Tracker (PMHT) is an efficient approach to cope with it. Linearity in the number of targets and measurements is the main motivation for its continued study. Unfortunately, the PMHT has not yet shown its superiority in terms of a better track-lost statistics. Furthermore, the problem of track extraction is not satisfactorily solved. This work focuses on mitigating the PMHT's main problems and presents the integration of a sequential likelihood-ratio test for track extraction.
  • Konferenzbeitrag
    Rao-blackwellized particle filter for security surveillance
    (Informatik 2009 – Im Focus das Leben, 2009) Govaers, Felix; Wieneke, Monika