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Gestimator : A Fast, Accurate and Robust Gesture Recognition Method

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Title: Gestimator : A Fast, Accurate and Robust Gesture Recognition Method
Author(s): Ye, Yina
Contributor: University of Helsinki, Faculty of Science, Department of Computer Science
Discipline: Computer science
Language: English
Acceptance year: 2015
Gesture recognition is a fundamental technology for understanding human behavior and providing natural human-computer interaction, of which the need has been boosted by the popularity of ubiquitous systems and applications. Currently, there are mainly two classes of gesture recognition approaches: parametric methods and the template matching methods. Although both approaches provide accurate recognition performance, the former is usually highly constrained in time and resources, while the latter is limited within a small range of gesture types that are simple and distinct from each other. The objective of the thesis is to present a novel stroke-based gesture recognition solution, Gestimator, that recognizes dynamic hand gestures with high accuracy, run-time efficiency, and ease for customization, considering a wide range of complexity, ambiguity, and difficulty for user to perform the gesture. A stroke-wise elastic gesture matching framework alongside an adaptive sequence segmentation technique were developed for improving recognition accuracy. We conducted extensive evaluations using three datasets that included pen-based command gestures, character gestures, and mid-air gestures collected from a user authentication experiment. Results from extensive benchmark evaluations prove that Gestimator achieves higher overall accuracy, compared with three state-of-the-art gesture recognizers, dealing with both touch-screen based gestures (98:9%) and spatial gestures (96:61%). Results also show that Gestimator outperforms baseline methods on recognizing ambiguous gestures.

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