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Modelling Gesture

  • Shaogang Gong
  • Tao Xiang

Abstract

Gesture, particularly hand gesture, is an important part of human body language which conveys messages and reveals human intention and emotional state. Automatic interpretation of gesture provides an important means for interaction and communication between human and computer, going beyond the conventional text and graphic based interface. Broadly speaking, human gesture can be composed of movements from any body part of a person, although the most relevant body parts are face and hand. In this sense, facial expression is a special case of gesture. Facial expression and hand movement often act together to define a coherent gesture, and can be better understood if analysed together. This is especially true when interpreting human emotional state based on visual observation of body language. A gesture is a dynamic process, typically characterised by the spatio-temporal trajectory of body motion, and modelled as trajectories in a multivariate feature space. In this chapter, we describe plausible methods for tracking both individual body parts and overall body movement to construct trajectories for gesture representation. Unsupervised learning is explored for automatically segmenting a gesture movement sequence into atomic components and discovering the number of distinctive gesture classes. We also study supervised learning for modelling a gesture sequence as a stochastic process, with classification of different gesture processes learned from data. In addition, the problem of affective state recognition is considered by analysing both facial expression and body gesture together for interpreting the emotional state of a person.

Keywords

Facial Expression Canonical Correlation Analysis Hand Gesture Belief Revision Atomic Action 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag London Limited 2011

Authors and Affiliations

  1. 1.School of Electronic Engineering and Computer ScienceQueen Mary University of LondonLondonUK
  2. 2.School of Electronic Engineering and Computer ScienceQueen Mary University of LondonLondonUK

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