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- W2002109056 abstract "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 the classifier used) in the short-term context." @default.
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- W2002109056 date "2009-09-01" @default.
- W2002109056 modified "2023-10-02" @default.
- W2002109056 title "On assessing the robustness of pen coordinates, pen pressure and pen inclination to time variability with personal entropy" @default.
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- W2002109056 doi "https://doi.org/10.1109/btas.2009.5339074" @default.
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