Lancaster EPrints

Face Poser:Interactive Modeling of 3D Facial Expressions Using Model Priors

Lau, Manfred and Chai, Jinxiang and Xu, Ying-Qing and Shum, Harry (2007) Face Poser:Interactive Modeling of 3D Facial Expressions Using Model Priors. In: SCA '07 Proceedings of the 2007 ACM SIGGRAPH/Eurographics symposium on Computer animation. Eurographics Association, Aire-la-Ville, Switzerland, pp. 161-170. ISBN 978-1-59593-624-0

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Abstract

In this paper, we present an intuitive interface for interactively posing 3D facial expressions. The user can create and edit facial expressions by drawing freeform strokes, or by directly dragging facial points in 2D screen space. Designing such an interface for face modeling and editing is challenging because many unnatural facial expressions might be consistent with the ambiguous user input. The system automatically learns a model prior from a prerecorded facial expression database and uses it to remove the ambiguity. We formulate the problem in a maximum a posteriori (MAP) framework by combining the prior with user-defined constraints. Maximizing the posterior allows us to generate an optimal and natural facial expression that satisfies the user-defined constraints. Our system is interactive; it is also simple and easy to use. A first-time user can learn to use the system and start creating a variety of natural face models within minutes. We evaluate the performance of our approach with cross validation tests, and by comparing with alternative techniques.

Item Type: Contribution in Book/Report/Proceedings
Subjects: UNSPECIFIED
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 49942
Deposited By: ep_importer_pure
Deposited On: 20 Sep 2011 11:52
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2014 00:39
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/49942

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