Query driven localized linear discriminant models for head pose estimation

Head pose appearances under the pan and tilt variations span a high dimensional manifold that has complex structures and local variations. For pose estimation purpose, we need to discover the subspace structure of the manifold and learn discriminative subspaces/metrics for head pose recognition. The performance of the head pose estimation is heavily dependent on the accuracy of structure learnt and the discriminating power of the metric. In this work we develop a query point driven, localized linear subspace learning method that approximates the non-linearity of the head pose manifold structure with piece-wise linear discriminating subspaces/metrics. Simulation results demonstrate the effectiveness of the proposed solution in both accuracy and computational efficiency.