On assessing the robustness of pen coordinates, pen pressure and pen inclination to short-term and long-term time variability with personal entropy - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2009

On assessing the robustness of pen coordinates, pen pressure and pen inclination to short-term and long-term time variability with personal entropy

Résumé

In this work, we study different combinations of the five time functions captured by a digitizer in presence or not of time variability. To this end, we propose two criteria independent of the classification step: Personal Entropy,introduced in our previous works and an intra-class variability measure based on Dynamic Time Warping. We confront both criteria to system performance using a Hidden Markov Model (HMM) and Dynamic Time Warping (DTW). Moreover, we introduce the concept of short-term time variability, proposed on MCYT-100, and long-term time variability studied with BIOMET database. Our experiments clarify conflicting results in the literature and confirm some other: pen inclination angles are very unstable in presence or not of time variability; the only combination which is robust to time variability is that containing only coordinates; finally, pen pressure is not recommended in the long-term context, although it may give better results in terms of performance (according to theclassifier used) in the short-term context
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Dates et versions

hal-00447588 , version 1 (15-01-2010)

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Citer

Nesma Houmani, Sonia Garcia-Salicetti, Bernadette Dorizzi. On assessing the robustness of pen coordinates, pen pressure and pen inclination to short-term and long-term time variability with personal entropy. BTAS 2009 : IEEE 3rd International Conference on Biometrics : Theory, Applications and Systems, Sep 2009, Washington, United States. pp.1 - 6, ⟨10.1109/BTAS.2009.5339074⟩. ⟨hal-00447588⟩
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