Robust and efficient parametric face alignment
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...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2011
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| Online Access: | https://eprints.nottingham.ac.uk/31462/ |
| _version_ | 1848794209295794176 |
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| author | Tzimiropoulos, Georgios Zafeiriou, Stefanos Pantic, Maja |
| author_facet | Tzimiropoulos, Georgios Zafeiriou, Stefanos Pantic, Maja |
| author_sort | Tzimiropoulos, Georgios |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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 http://ibug.doc.ic.ac.uk/resources. |
| first_indexed | 2025-11-14T19:12:33Z |
| format | Conference or Workshop Item |
| id | nottingham-31462 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:12:33Z |
| publishDate | 2011 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-314622020-05-04T20:24:38Z https://eprints.nottingham.ac.uk/31462/ Robust and efficient parametric face alignment Tzimiropoulos, Georgios Zafeiriou, Stefanos Pantic, Maja 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 http://ibug.doc.ic.ac.uk/resources. 2011 Conference or Workshop Item PeerReviewed 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. http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6126452&filter=AND%28p_Publication_Number:6118259%29 |
| spellingShingle | Tzimiropoulos, Georgios Zafeiriou, Stefanos Pantic, Maja Robust and efficient parametric face alignment |
| title | Robust and efficient parametric face alignment |
| title_full | Robust and efficient parametric face alignment |
| title_fullStr | Robust and efficient parametric face alignment |
| title_full_unstemmed | Robust and efficient parametric face alignment |
| title_short | Robust and efficient parametric face alignment |
| title_sort | robust and efficient parametric face alignment |
| url | https://eprints.nottingham.ac.uk/31462/ https://eprints.nottingham.ac.uk/31462/ |