A Unified Approach To Coding and Interpreting Face ... - CiteSeerX

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A Unified Approach To Coding and Interpreting Face Images. A. Lanitis, C.J. Taylor, T.F.Cootes. Department of Medical Biophysics, University of Manchester, UK.
A Unified Approach To Coding and Interpreting Face Images A. Lanitis, C.J. Taylor, T.F.Cootes Department of Medical Biophysics, University of Manchester, UK Abstract Face images are difficult to interpret because they are highly variable. Sources of variability include individual appear ance, 3D pose, facial expression and lighting. We describe a compact parametrised model of facial appearance which takes into account all these sources of variability. The model represents both shape and grey-level appearance and is created by performing a statistical analysis over a training set of face images. A robust multi-resolution search algo rithm is used to fit the model to faces in new images. This allows the main facial features to be located and a set of shape and grey-level appearance parameters to be recov ered. A good approximation to a given face can be recon structed using less than 100 of these parameters. This repre sentation can be used for tasks such as image coding, person identification, pose recovery, gender recognition and ex pression recognition. The system performs well on all the tasks listed above. 1: Introduction

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