Robust and efficient parametric face alignment

Tzimiropoulos, Georgios, Zafeiriou, Stefanos and Pantic, Maja (2011) Robust and efficient parametric face alignment. In: 2011 IEEE International Conference on Computer Vision (ICCV), 6-13 November 2011, Barcelona, Spain.

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We propose a correlation-based approach to parametric object alignment particularly suitable for face analysis applications which require efficiency and robustness against occlusions and illumination changes. Our algorithm registers two images by iteratively maximizing their correlation coefficient using gradient ascent. We compute this correlation coefficient from complex gradients which capture the orientation of image structures rather than pixel intensities. The maximization of this gradient correlation coefficient results in an algorithm which is as computationally efficient as ℓ2 norm-based algorithms, can be extended within the inverse compositional framework (without the need for Hessian recomputation) and is robust to outliers. To the best of our knowledge, no other algorithm has been proposed so far having all three features. We show the robustness of our algorithm for the problem of face alignment in the presence of occlusions and non-uniform illumination changes. The code that reproduces the results of our paper can be found at

Item Type: Conference or Workshop Item (Paper)
Additional Information: © 2011 IEEE. Published in: 2011 IEEE International Conference on Computer Vision Workshops. Piscataway, N.J. : IEEE, 2011. ISBN: 9781467300629. doi: 10.1109/ICCV.2011.6126452 Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Computer Science
Depositing User: Tzimiropoulos, Yorgos
Date Deposited: 02 Feb 2016 10:27
Last Modified: 04 May 2020 20:24

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