Estimating human body and head orientation change to detect visual attention direction
ACCV'10 Proceedings of the 2010 international conference on Computer vision - Volume Part I
Coarse head pose estimation of construction equipment operators to formulate dynamic blind spots
Advanced Engineering Informatics
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This paper presents a high performance ........ pose estimation system based on the newly-proposed sparse Bayesian regression technique (Relevance Vector Machine, RVM) and sparse representation of facial patterns. In our system, after localizing 20 key facial points, sparse features of these points are extracted to represent facial property, and then..RVM is utilized to learn the relation between the sparse representation and yaw and pitch angle. Because RVM requires only a very few kernel functions, it can guarantee better generalization, faster speed and less memory in a practical implementation. To thoroughly evaluate the performance of our system, we compare it with conventional methods such as CCA, Kernel CCA, SVR on a large database; In experiments, we also investigate the influence of the facial points localization error on pose estimation by using manually labelled results and automatically localized results separately, and the influence of different features on pose estimation such as geometrical features and texture features. These experimental results demonstrate that our system can estimate face pose more accurately, robustly and fast than those based on conventional methods.