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Pointing Gestures and Referring Expressions For a Virtual Guide

This article describes a research project investigating the possibility of using the model for generating combined linguistic and gestural references to an object proposed by van der Sluis in a Virtual Guide agent for generating pointing gestures [Slu05]. Additionally some other algorithms concerning generation of referring expressions will be discussed and their features and functionality compared. We come across several problems when we try to match our domain information onto the algorithm of van der Sluis concerning how to interpret ambiguous statements used by humans to describe items. Also how to translate the costs of pointing in a fully 3d environment compared to the close range pointing used in the van der Sluis algorithm. We conclude that in a location with a low number of similar objects the proposed algorithm is overkill. However in an environment that is richer with objects it might be better suited.