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Illustrations of Auslan basic hand postures used in the evaluation.

Illustrations of Auslan basic hand postures used in the evaluation.

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Figure 1: Structure of the HMU system. The HMU hand tracker extracts 3D...
Figure 2: Hand model used in the HMU hand tracker. The base coordinate...
Figure 3: Prediction of the missing marker. The tracker uses a limited...
Figure 4: One cycle of state estimation. All model parameters are...
+3 Figure 8: Illustrations of Auslan basic hand postures used in the...
An Adaptive Fuzzy Expert System for 3D Hand Motion Understanding
Article
Full-text available
  • Oct 2000
The Hand Motion Understanding (HMU) system recognises static and dynamic hand signs in Australian Sign Language (Auslan) by dealing with "fine grain" hand motion, such as configuration changes of fingers. The system consists of the 3D hand tracker and the adaptive fuzzy expert classifier. The hand tracker extracts 3D hand configuration data with 21...
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Context 1
... posture rule base consists of 22 postures that are a subset of Auslan basic hand postures and their variants. They are illustrated in Figure 8. The sign rule base consists of 22 signs, including 11 static signs and 11 dynamic signs. ...

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A semantics-driven, fuzzy logic-based approach to knowledge representation and inference
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The use of Fuzzy Logic allows for a natural expression of concepts employed by experts and users. Although the use of Fuzzy Logic partially reduces the software systems maintenance problems associated to vagueness modelling, it introduces other problems in tuning the numbers used by the system to model such vagueness. On the other hand, Ripple Down Rules (RDR) provide for easy maintenance when dealing with Knowledge-based systems but it does not allow to model terminological vagueness. The work presented in this paper shows the fundamentals of a theoretical approach that combines both methodologies RDR and Fuzzy Logic into a semantics-driven framework. We believe that the advantages of using/implementing this framework are clear, although a number research issues remain open.
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