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Erschienen in:
2010 | OriginalPaper | Buchkapitel
A Face Attention Technique for a Robot Able to Interpret Facial Expressions
verfasst von : Carlos Simplício, José Prado, Jorge Dias
Erschienen in: Emerging Trends in Technological Innovation
Verlag: Springer Berlin Heidelberg
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Automatic facial expressions recognition using vision is an important subject towards human-robot interaction. Here is proposed a human face focus of attention technique and a facial expressions classifier (a Dynamic Bayesian Network) to incorporate in an autonomous mobile agent whose hardware is composed by a robotic platform and a robotic head. The focus of attention technique is based on the symmetry presented by human faces. By using the output of this module the autonomous agent keeps always targeting the human face frontally. In order to accomplish this, the robot platform performs an arc centered at the human; thus the robotic head, when necessary, moves synchronized. In the proposed probabilistic classifier the information is propagated, from the previous instant, in a lower level of the network, to the current instant. Moreover, to recognize facial expressions are used not only positive evidences but also negative.