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2017 | OriginalPaper | Buchkapitel

Technical Gestures Recognition by Set-Valued Hidden Markov Models with Prior Knowledge

verfasst von : Yann Soullard, Alessandro Antonucci, Sébastien Destercke

Erschienen in: Soft Methods for Data Science

Verlag: Springer International Publishing

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Abstract

Hidden Markov models are popular tools for gesture recognition. Once the generative processes of gestures have been identified, an observation sequence is usually classified as the gesture having the highest likelihood, thus ignoring possible prior information. In this paper, we consider two potential improvements of such methods: the inclusion of prior information, and the possibility of considering convex sets of probabilities (in the likelihoods and the prior) to infer imprecise, but more reliable, predictions when information is insufficient. We apply the proposed approach to technical gestures, typically characterized by severe class imbalance. By modelling such imbalances as a prior information, we achieve more accurate results, while the imprecise quantification is shown to produce more reliable estimates.

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Metadaten
Titel
Technical Gestures Recognition by Set-Valued Hidden Markov Models with Prior Knowledge
verfasst von
Yann Soullard
Alessandro Antonucci
Sébastien Destercke
Copyright-Jahr
2017
DOI
https://doi.org/10.1007/978-3-319-42972-4_56