Georgios Tzimiropoulos

Dr. Georgios Tzimiropoulos

Position:

Affiliated Academic

New Position:

Lecturer at Lincoln University, UK

Email:

Biography

I received the diploma degree in electrical and computer engineering from Aristotle University of Thessaloniki, Greece, in 2004 and the M.Sc. and Ph.D. degrees in signal processing and computer vision from Imperial College London, U.K., in 2005 and 2009, respectively. After the completion of my Ph.D., I was working as a Research and Development engineer with Imperial College/Selex Galileo. Since June 2010, I am a Research Associate in the Department of Computing at Imperial College working with Prof. Maja Pantic on face analysis.

Publications

Journal articles

AFEW-VA database for valence and arousal estimation in-the-wild

J. Kossaifi, G. Tzimiropoulos, S. Todorovic, M. Pantic. Image and Vision Computing. .

Bibtex reference [hide]
@article{kossaifi_afewva,
    author = {J. Kossaifi and G. Tzimiropoulos and S. Todorovic and M. Pantic},
    journal = {Image and Vision Computing},
    title = {AFEW-VA database for valence and arousal estimation in-the-wild},
}
Endnote reference [hide]

Fast and exact Newton and Bidirectional fitting of Active Appearance Models

J. Kossaifi, G. Tzimiropoulos, M. Pantic. IEEE Transactions on Image Processing (TIP), accepted for publication. 2016.

Bibtex reference [hide]
@article{kossaifi_aam_tip,
    author = {J. Kossaifi and G. Tzimiropoulos and M. Pantic},
    journal = {IEEE Transactions on Image Processing (TIP), accepted for publication},
    title = {Fast and exact Newton and Bidirectional fitting of Active Appearance Models},
    year = {2016},
}
Endnote reference [hide]

Fast Algorithms for Fitting Active Appearance Models to Unconstrained Images

G. Tzimiropoulos, M. Pantic. International Journal of Computer Vision (IJCV). pp. 1 - 17, 2016.

Bibtex reference [hide]
@article{tzimiropoulos_ijcv_2016,
    author = {G. Tzimiropoulos and M. Pantic},
    pages = {1--17},
    journal = {International Journal of Computer Vision (IJCV)},
    title = {Fast Algorithms for Fitting Active Appearance Models to Unconstrained Images},
    url = {http://dx.doi.org/10.1007/s11263-016-0950-1},
    year = {2016},
}
Endnote reference [hide]

A Robust Similarity Measure for Volumetric Image Registration with Outliers

P. Snape, S. Pszczolkowski, S. Zafeiriou, G. Tzimiropoulos, C. Ledig, D. Rueckert. Image and Vision Computing. 52: pp. 97 - 113, August 2016.

Bibtex reference [hide]
@article{snape2015volumetric,
    author = {P. Snape and S. Pszczolkowski and S. Zafeiriou and G. Tzimiropoulos and C. Ledig and D. Rueckert},
    pages = {97--113},
    journal = {Image and Vision Computing},
    month = {August},
    title = {A Robust Similarity Measure for Volumetric Image Registration with Outliers},
    url = {http://doi.org/10.1016/j.imavis.2016.05.006},
    volume = {52},
    year = {2016},
}
Endnote reference [hide]

300 Faces In-The-Wild Challenge: Database and Results

C. Sagonas, E. Antonakos, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Image and Vision Computing, Special Issue on Facial Landmark Localisation "In-The-Wild". 47: pp. 3 - 18, 2016.

Bibtex reference [hide]
@article{sagonas2016300w,
    author = {C. Sagonas and E. Antonakos and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {3--18},
    journal = {Image and Vision Computing, Special Issue on Facial Landmark Localisation "In-The-Wild"},
    publisher = {Elsevier},
    title = {300 Faces In-The-Wild Challenge: Database and Results},
    volume = {47},
    year = {2016},
}
Endnote reference [hide]

Feature-Based Lucas-Kanade and Active Appearance Models

E. Antonakos, J. Alabort-i-medina, G. Tzimiropoulos, S. Zafeiriou. IEEE Transactions on Image Processing. 24(9): pp. 2617 - 2632, September 2015.

Bibtex reference [hide]
@article{antonakos2015feature,
    author = {E. Antonakos and J. Alabort-i-medina and G. Tzimiropoulos and S. Zafeiriou},
    pages = {2617--2632},
    journal = {IEEE Transactions on Image Processing},
    month = {September},
    number = {9},
    publisher = {IEEE},
    title = {Feature-Based Lucas-Kanade and Active Appearance Models},
    volume = {24},
    year = {2015},
}
Endnote reference [hide]
%0 Journal Article
%T Feature-Based Lucas-Kanade and Active Appearance Models
%A Antonakos, E.
%A Alabort-i-medina, J.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%J IEEE Transactions on Image Processing
%D 2015
%8 September
%V 24
%N 9
%I IEEE
%F antonakos2015feature
%P 2617-2632

From Pixels to Response Maps: Discriminative Image Filtering for Face Alignment in the Wild

A. Asthana, S. Zafeiriou, G. Tzimiropoulos, S. Cheng, M. Pantic. IEEE Transactions on Pattern Analysis and Machine Intelligence (T-PAMI). In Press.. 2015.

Bibtex reference [hide]
@article{pami_2015,
    author = {A. Asthana and S. Zafeiriou and G. Tzimiropoulos and S. Cheng and M. Pantic},
    journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence (T-PAMI). In Press.},
    title = {From Pixels to Response Maps: Discriminative Image Filtering for Face Alignment in the Wild},
    year = {2015},
}
Endnote reference [hide]
%0 Journal Article
%T From Pixels to Response Maps: Discriminative Image Filtering for Face Alignment in the Wild
%A Asthana, A.
%A Zafeiriou, S.
%A Tzimiropoulos, G.
%A Cheng, S.
%A Pantic, M.
%J IEEE Transactions on Pattern Analysis and Machine Intelligence (T-PAMI). In Press.
%D 2015
%F pami_2015

Online learning and fusion of orientation appearance models for robust rigid object tracking

I. Marras, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Image and Vision Computing. 32(10): pp. 707 - 727, 2014.

Bibtex reference [hide]
@article{marras_journal,
    author = {I. Marras and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {707--727},
    journal = {Image and Vision Computing},
    number = {10},
    publisher = {Elsevier},
    title = {Online learning and fusion of orientation appearance models for robust rigid object tracking},
    volume = {32},
    year = {2014},
}
Endnote reference [hide]
%0 Journal Article
%T Online learning and fusion of orientation appearance models for robust rigid object tracking
%A Marras, I.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%J Image and Vision Computing
%D 2014
%V 32
%N 10
%I Elsevier
%F marras_journal
%P 707-727

Active Orientation Models for Face Alignment in-the-wild

G. Tzimiropoulos, J. Alabort-i-medina, S. Zafeiriou, M. Pantic. IEEE Transactions on Information Forensics and Security, Special Issue on Facial Biometrics in-the-wild (in press). 9: pp. 2024 - 2034, December 2014.

Bibtex reference [hide]
@article{AOMs_WILD,
    author = {G. Tzimiropoulos and J. Alabort-i-medina and S. Zafeiriou and M. Pantic},
    pages = {2024--2034},
    journal = {IEEE Transactions on Information Forensics and Security, Special Issue on Facial Biometrics in-the-wild (in press)},
    month = {December},
    title = {Active Orientation Models for Face Alignment in-the-wild},
    volume = {9},
    year = {2014},
}
Endnote reference [hide]
%0 Journal Article
%T Active Orientation Models for Face Alignment in-the-wild
%A Tzimiropoulos, G.
%A Alabort-i-medina, J.
%A Zafeiriou, S.
%A Pantic, M.
%J IEEE Transactions on Information Forensics and Security, Special Issue on Facial Biometrics in-the-wild (in press)
%D 2014
%8 December
%V 9
%F AOMs_WILD
%P 2024-2034

An Algorithm for Finding Biologically Significant Features in Microarray Data Based on A Priori Manifold Learning

G. Tzimiropoulos, Z. Hira, D. F. Gillies. PLoS ONE. 2014.

Bibtex reference [hide]
@article{apriorimanifold,
    author = {Z. Hira and G. Tzimiropoulos and D. F. Gillies},
    journal = {PLoS ONE},
    title = {An Algorithm for Finding Biologically Significant Features in Microarray Data Based on A Priori Manifold Learning},
    url = {http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0090562},
    year = {2014},
}
Endnote reference [hide]
%0 Journal Article
%T An Algorithm for Finding Biologically Significant Features in Microarray Data Based on A Priori Manifold Learning
%A Hira, Z.
%A Tzimiropoulos, G.
%A Gillies, D. F.
%J PLoS ONE
%D 2014
%F apriorimanifold
%U http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0090562

An Algorithm for Finding Biologically Significant Features in Microarray Data Based on A Priori Manifold Learning

G. Tzimiropoulos, Z. Hira, D. F. Gillies. PLoS ONE. 2014.

Bibtex reference [hide]
@article{apriorimanifold2,
    author = {Z. Hira and G. Tzimiropoulos and D. F. Gillies},
    journal = {PLoS ONE},
    title = {An Algorithm for Finding Biologically Significant Features in Microarray Data Based on A Priori Manifold Learning},
    url = {http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0090562},
    year = {2014},
}
Endnote reference [hide]
%0 Journal Article
%T An Algorithm for Finding Biologically Significant Features in Microarray Data Based on A Priori Manifold Learning
%A Hira, Z.
%A Tzimiropoulos, G.
%A Gillies, D. F.
%J PLoS ONE
%D 2014
%F apriorimanifold2
%U http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0090562

Euler Principal Component Analysis

S. Liwicki, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. International Journal of Computer Vision. 101(3): pp. 498 - 518, 2013.

Bibtex reference [hide]
@article{liwicki2012euler,
    author = {S. Liwicki and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {498--518},
    journal = {International Journal of Computer Vision},
    number = {3},
    title = {Euler Principal Component Analysis},
    volume = {101},
    year = {2013},
}
Endnote reference [hide]
%0 Journal Article
%T Euler Principal Component Analysis
%A Liwicki, S.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%J International Journal of Computer Vision
%D 2013
%V 101
%N 3
%F liwicki2012euler
%P 498-518

Subspace Learning from Image Gradient Orientations

G. Tzimiropoulos, S. Zafeiriou, M. Pantic. IEEE Transactions on Pattern Analysis and Machine Intelligence. 34(12): pp. 2454 - 2466, 2012.

Bibtex reference [hide]
@article{tzimiro2012,
    author = {G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {2454--2466},
    journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
    number = {12},
    title = {Subspace Learning from Image Gradient Orientations},
    volume = {34},
    year = {2012},
}
Endnote reference [hide]
%0 Journal Article
%T Subspace Learning from Image Gradient Orientations
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%J IEEE Transactions on Pattern Analysis and Machine Intelligence
%D 2012
%V 34
%N 12
%F tzimiro2012
%P 2454-2466

Efficient Online Subspace Learning with an Indefinite Kernel for Visual Tracking and Recognition

S. Liwicki, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. IEEE Transactions on Neural Networks and Learning Systems. 23: pp. 1624 - 1636, October 2012.

Bibtex reference [hide]
@article{liwicki2012efficient,
    author = {S. Liwicki and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {1624--1636},
    journal = {IEEE Transactions on Neural Networks and Learning Systems},
    month = {October},
    title = {Efficient Online Subspace Learning with an Indefinite Kernel for Visual Tracking and Recognition},
    volume = {23},
    year = {2012},
}
Endnote reference [hide]
%0 Journal Article
%T Efficient Online Subspace Learning with an Indefinite Kernel for Visual Tracking and Recognition
%A Liwicki, S.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%J IEEE Transactions on Neural Networks and Learning Systems
%D 2012
%8 October
%V 23
%F liwicki2012efficient
%P 1624-1636

Regularized Kernel Discriminant Analysis With a Robust Kernel for Face Recognition and Verification

S. Zafeiriou, G. Tzimiropoulos, M. Petrou, T. Stathaki. IEEE Transactions on Neural Networks and Learning Systems (accepted for publication). 2011.

Bibtex reference [hide]
@article{szafeirioutnn2011,
    author = {S. Zafeiriou and G. Tzimiropoulos and M. Petrou and T. Stathaki},
    journal = {IEEE Transactions on Neural Networks and Learning Systems (accepted for publication)},
    title = {Regularized Kernel Discriminant Analysis With a Robust Kernel for Face Recognition and Verification},
    year = {2011},
}
Endnote reference [hide]
%0 Journal Article
%T Regularized Kernel Discriminant Analysis With a Robust Kernel for Face Recognition and Verification
%A Zafeiriou, S.
%A Tzimiropoulos, G.
%A Petrou, M.
%A Stathaki, T.
%J IEEE Transactions on Neural Networks and Learning Systems (accepted for publication)
%D 2011
%F szafeirioutnn2011

Subpixel registration with gradient correlation

G. Tzimiropoulos, V. Argyriou, T. Stathaki. IEEE Transactions on Image Processing. to appear. 2011.

Bibtex reference [hide]
@article{tzimiropoulosSubpixel,
    author = {G. Tzimiropoulos and V. Argyriou and T. Stathaki},
    journal = {IEEE Transactions on Image Processing},
    note = {to appear},
    publisher = {IEEE},
    title = {Subpixel registration with gradient correlation},
    year = {2011},
}
Endnote reference [hide]
%0 Journal Article
%T Subpixel registration with gradient correlation
%A Tzimiropoulos, G.
%A Argyriou, V.
%A Stathaki, T.
%J IEEE Transactions on Image Processing
%D 2011
%I IEEE
%F tzimiropoulosSubpixel
%O to appear

Robust FFT-Based Scale-Invariant Image Registration with Image Gradients

G. Tzimiropoulos, V. Argyriou, S. Zafeiriou, T. Stathaki. IEEE Transactions on Pattern Analysis and Machine Intelligence. 32(10): pp. 1899 - 1906, 2010.

Bibtex reference [hide]
@article{tzimiropoulos2010robust,
    author = {G. Tzimiropoulos and V. Argyriou and S. Zafeiriou and T. Stathaki},
    pages = {1899--1906},
    journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
    number = {10},
    publisher = {Published by the IEEE Computer Society},
    title = {Robust FFT-Based Scale-Invariant Image Registration with Image Gradients},
    volume = {32},
    year = {2010},
}
Endnote reference [hide]
%0 Journal Article
%T Robust FFT-Based Scale-Invariant Image Registration with Image Gradients
%A Tzimiropoulos, G.
%A Argyriou, V.
%A Zafeiriou, S.
%A Stathaki, T.
%J IEEE Transactions on Pattern Analysis and Machine Intelligence
%D 2010
%V 32
%N 10
%I Published by the IEEE Computer Society
%F tzimiropoulos2010robust
%P 1899-1906

A unifying approach to moment-based shape orientation and symmetry classification

G. Tzimiropoulos, N. Mitianoudis, T. Stathaki. IEEE Transactions on Image Processing. 18(1): pp. 125 - 139, 2009.

Bibtex reference [hide]
@article{tzimiropoulos2009unifying,
    author = {G. Tzimiropoulos and N. Mitianoudis and T. Stathaki},
    pages = {125--139},
    journal = {IEEE Transactions on Image Processing},
    number = {1},
    publisher = {IEEE},
    title = {A unifying approach to moment-based shape orientation and symmetry classification},
    volume = {18},
    year = {2009},
}
Endnote reference [hide]
%0 Journal Article
%T A unifying approach to moment-based shape orientation and symmetry classification
%A Tzimiropoulos, G.
%A Mitianoudis, N.
%A Stathaki, T.
%J IEEE Transactions on Image Processing
%D 2009
%V 18
%N 1
%I IEEE
%F tzimiropoulos2009unifying
%P 125-139

Robust recognition of planar shapes under affine transforms using principal component analysis

G. Tzimiropoulos, N. Mitianoudis, T. Stathaki. Signal Processing Letters, IEEE. 14(10): pp. 723 - 726, 2007.

Bibtex reference [hide]
@article{tzimiropoulos2007robust,
    author = {G. Tzimiropoulos and N. Mitianoudis and T. Stathaki},
    pages = {723--726},
    journal = {Signal Processing Letters, IEEE},
    number = {10},
    publisher = {IEEE},
    title = {Robust recognition of planar shapes under affine transforms using principal component analysis},
    volume = {14},
    year = {2007},
}
Endnote reference [hide]
%0 Journal Article
%T Robust recognition of planar shapes under affine transforms using principal component analysis
%A Tzimiropoulos, G.
%A Mitianoudis, N.
%A Stathaki, T.
%J Signal Processing Letters, IEEE
%D 2007
%V 14
%N 10
%I IEEE
%F tzimiropoulos2007robust
%P 723-726

Conference articles

The First Facial Landmark Tracking in-the-Wild Challenge: Benchmark and Results

J. Shen, S. Zafeiriou, G. Chrysos, J. Kossaifi, G. Tzimiropoulos, M. Pantic. Proceedings of IEEE International Conference on Computer Vision, 300 Videos in the Wild (300-VW): Facial Landmark Tracking in-the-Wild Challenge & Workshop (ICCVW'15). December 2015.

Bibtex reference [hide]
@inproceedings{300VW,
    author = {J. Shen and S. Zafeiriou and G. Chrysos and J. Kossaifi and G. Tzimiropoulos and M. Pantic},
    booktitle = {Proceedings of IEEE International Conference on Computer Vision, 300 Videos in the Wild (300-VW): Facial Landmark Tracking in-the-Wild Challenge & Workshop (ICCVW'15)},
    month = {December},
    title = {The First Facial Landmark Tracking in-the-Wild Challenge: Benchmark and Results},
    year = {2015},
}
Endnote reference [hide]

Fast and exact Bi-directional Fitting of Active Appearance Models

J. Kossaifi, G. Tzimiropoulos, M. Pantic. Proceedings of the IEEE Int’l Conf. on Image Processing (ICIP’15). Quebec City, QC, Canada, pp. 1135 - 1139, September 2015.

Bibtex reference [hide]
@inproceedings{kossaifi_bidirectional_aam,
    author = {J. Kossaifi and G. Tzimiropoulos and M. Pantic},
    pages = {1135--1139},
    address = {Quebec City, QC, Canada},
    booktitle = {Proceedings of the IEEE Int’l Conf. on Image Processing (ICIP’15)},
    month = {September},
    title = {Fast and exact Bi-directional Fitting of Active Appearance Models},
    year = {2015},
}
Endnote reference [hide]

HOG Active Appearance Models

E. Antonakos, J. Alabort-i-medina, G. Tzimiropoulos, S. Zafeiriou. Proceedings of IEEE International Conference on Image Processing (ICIP'14). Paris, France, pp. 224 - 228, (Top 10% papers award). October 2014.

Bibtex reference [hide]
@inproceedings{antonakos2014hog,
    author = {E. Antonakos and J. Alabort-i-medina and G. Tzimiropoulos and S. Zafeiriou},
    pages = {224--228},
    address = {Paris, France},
    booktitle = {Proceedings of IEEE International Conference on Image Processing (ICIP'14)},
    month = {October},
    note = {(Top 10% papers award)},
    title = {HOG Active Appearance Models},
    year = {2014},
}
Endnote reference [hide]
%0 Conference Proceedings
%T HOG Active Appearance Models
%A Antonakos, E.
%A Alabort-i-medina, J.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%B Proceedings of IEEE International Conference on Image Processing (ICIP?14)
%D 2014
%8 October
%C Paris, France
%F antonakos2014hog
%O (Top 10% papers award)
%P 224-228

Fast Newton Active Appearance Models

J. Kossaifi, G. Tzimiropoulos, M. Pantic. Proceedings of the IEEE Int’l Conf. on Image Processing (ICIP’14). Paris, France, pp. 1420 - 1424, October 2014.

Bibtex reference [hide]
@inproceedings{kossaifi_newton_aam,
    author = {J. Kossaifi and G. Tzimiropoulos and M. Pantic},
    pages = {1420--1424},
    address = {Paris, France},
    booktitle = {Proceedings of the IEEE Int’l Conf. on Image Processing (ICIP’14)},
    month = {October},
    title = {Fast Newton Active Appearance Models},
    year = {2014},
}
Endnote reference [hide]

Gauss-Newton Deformable Part Models for Face Alignment in-the-Wild

G. Tzimiropoulos, M. Pantic. CVPR 2014. 2014.

Bibtex reference [hide]
@inproceedings{tzimirocvpr2014,
    author = {G. Tzimiropoulos and M. Pantic},
    booktitle = {CVPR 2014},
    title = {Gauss-Newton Deformable Part Models for Face Alignment in-the-Wild},
    year = {2014},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Gauss-Newton Deformable Part Models for Face Alignment in-the-Wild
%A Tzimiropoulos, G.
%A Pantic, M.
%B CVPR 2014
%D 2014
%F tzimirocvpr2014

300 Faces in-the-Wild Challenge: The first facial landmark localization Challenge

C. Sagonas, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV-W 2013), 300 Faces in-the-Wild Challenge (300-W). Sydney, Australia, December 2013.

Bibtex reference [hide]
@inproceedings{sagonas_iccv_300w_2013,
    author = {C. Sagonas and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    address = {Sydney, Australia},
    booktitle = {Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV-W 2013), 300 Faces in-the-Wild Challenge (300-W)},
    month = {December},
    title = {300 Faces in-the-Wild Challenge: The first facial landmark localization Challenge},
    year = {2013},
}
Endnote reference [hide]
%0 Conference Proceedings
%T 300 Faces in-the-Wild Challenge: The first facial landmark localization Challenge
%A Sagonas, C.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%B Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV-W 2013), 300 Faces in-the-Wild Challenge (300-W)
%D 2013
%8 December
%C Sydney, Australia
%F sagonas_iccv_300w_2013

Optimization problems for fast AAM fitting in-the-wild

G. Tzimiropoulos, M. Pantic. Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV 2013, Accepted). 2013.

Bibtex reference [hide]
@inproceedings{tzimiro_ICCV2013,
    author = {G. Tzimiropoulos and M. Pantic},
    booktitle = {Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV 2013, Accepted)},
    title = {Optimization problems for fast AAM fitting in-the-wild},
    year = {2013},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Optimization problems for fast AAM fitting in-the-wild
%A Tzimiropoulos, G.
%A Pantic, M.
%B Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV 2013, Accepted)
%D 2013
%F tzimiro_ICCV2013

A semi-automatic methodology for facial landmark annotation

C. Sagonas, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’13), 5th Workshop on Analysis and Modeling of Faces and Gestures (AMFG2013). Portland Oregon, USA, June 2013.

Bibtex reference [hide]
@inproceedings{sagonasEtAlCVPR_w_2013,
    author = {C. Sagonas and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    address = {Portland Oregon, USA},
    booktitle = {Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’13), 5th Workshop on Analysis and Modeling of Faces and Gestures (AMFG2013)},
    month = {June},
    title = {A semi-automatic methodology for facial landmark annotation},
    year = {2013},
}
Endnote reference [hide]
%0 Conference Proceedings
%T A semi-automatic methodology for facial landmark annotation
%A Sagonas, C.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%B Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’13), 5th Workshop on Analysis and Modeling of Faces and Gestures (AMFG2013)
%D 2013
%8 June
%C Portland Oregon, USA
%F sagonasEtAlCVPR_w_2013

Online Learning and Fusion of Orientation Appearance Models for Robust Rigid Object Tracking

I. Marras, J. Alabort-i-medina, G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Proceedings of the IEEE 10th International Conference on Automatic Face & Gesture Recognition (FG). April 2013.

Bibtex reference [hide]
@inproceedings{Marras_FG_2013,
    author = {I. Marras and J. Alabort-i-medina and G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    booktitle = {Proceedings of the IEEE 10th International Conference on Automatic Face & Gesture Recognition (FG)},
    month = {April},
    title = {Online Learning and Fusion of Orientation Appearance Models for Robust Rigid Object Tracking},
    year = {2013},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Online Learning and Fusion of Orientation Appearance Models for Robust Rigid Object Tracking
%A Marras, I.
%A Alabort-i-medina, J.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%B Proceedings of the IEEE 10th International Conference on Automatic Face & Gesture Recognition (FG)
%D 2013
%8 April
%F Marras_FG_2013

Generic Active Appearance Models Revisited

G. Tzimiropoulos, J. Alabort-i-medina, S. Zafeiriou, M. Pantic. 11th Asian Conference on Computer Vision (ACCV 2012). Daejeon, Korea, pp. 650 - 663, November 2012.

Bibtex reference [hide]
@inproceedings{tzimiroACCV2012_2,
    author = {G. Tzimiropoulos and J. Alabort-i-medina and S. Zafeiriou and M. Pantic},
    pages = {650--663},
    address = {Daejeon, Korea},
    booktitle = {11th Asian Conference on Computer Vision (ACCV 2012)},
    month = {November},
    title = {Generic Active Appearance Models Revisited},
    year = {2012},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Generic Active Appearance Models Revisited
%A Tzimiropoulos, G.
%A Alabort-i-medina, J.
%A Zafeiriou, S.
%A Pantic, M.
%B 11th Asian Conference on Computer Vision (ACCV 2012)
%D 2012
%8 November
%C Daejeon, Korea
%F tzimiroACCV2012_2
%P 650-663

Robust learning from normals for 3d face recognition

I. Marras, S. Zafeiriou, G. Tzimiropoulos. Computer Vision–European Conference on Computer Vision (ECCV-W'12), Workshops and Demonstrations . pp. 230 - 239, 2012.

Bibtex reference [hide]
@inproceedings{Marras_ECCV_Workshop_2012,
    author = {I. Marras and S. Zafeiriou and G. Tzimiropoulos},
    pages = {230--239},
    booktitle = {Computer Vision–European Conference on Computer Vision (ECCV-W'12), Workshops and Demonstrations },
    title = {Robust learning from normals for 3d face recognition},
    year = {2012},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Robust learning from normals for 3d face recognition
%A Marras, I.
%A Zafeiriou, S.
%A Tzimiropoulos, G.
%B Computer Vision–European Conference on Computer Vision (ECCV-W?12), Workshops and Demonstrations
%D 2012
%F Marras_ECCV_Workshop_2012
%P 230-239

Robust and Efficient Parametric Face Alignment

G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV 2011) . pp. 1847 - 1854, Oral. November 2011.

Bibtex reference [hide]
@inproceedings{tzimiroREPFAICCV2011,
    author = {G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {1847--1854},
    booktitle = {Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV 2011) },
    month = {November},
    note = {Oral},
    title = {Robust and Efficient Parametric Face Alignment},
    year = {2011},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Robust and Efficient Parametric Face Alignment
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%B Proceedings of IEEE Int’l Conf. on Computer Vision (ICCV 2011)
%D 2011
%8 November
%F tzimiroREPFAICCV2011
%O Oral
%P 1847-1854

Subspace Analysis Of Arbitrarily Many Linear Filter Responses with an application to Face Tracking

S. Zafeiriou, G. Tzimiropoulos, M. Pantic. Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’11), Workshop on Computer Vision for Computer Games. Colorado Springs, USA, pp. 37 - 42, June 2011.

Bibtex reference [hide]
@inproceedings{ZaferiouEtAlCVPRW2011,
    author = {S. Zafeiriou and G. Tzimiropoulos and M. Pantic},
    pages = {37--42},
    address = {Colorado Springs, USA},
    booktitle = {Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’11), Workshop on Computer Vision for Computer Games},
    month = {June},
    title = {Subspace Analysis Of Arbitrarily Many Linear Filter Responses with an application to Face Tracking},
    year = {2011},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Subspace Analysis Of Arbitrarily Many Linear Filter Responses with an application to Face Tracking
%A Zafeiriou, S.
%A Tzimiropoulos, G.
%A Pantic, M.
%B Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’11), Workshop on Computer Vision for Computer Games
%D 2011
%8 June
%C Colorado Springs, USA
%F ZaferiouEtAlCVPRW2011
%P 37-42

Sparse Representations of Image Gradient Orientations for Visual Recognition and Tracking

G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’11), Workshop on CVPR for Human Behaviour Analysis. Colorado Springs, USA, pp. 26 - 33, June 2011.

Bibtex reference [hide]
@inproceedings{TzimiropoulosEtAlCVPR2011,
    author = {G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {26--33},
    address = {Colorado Springs, USA},
    booktitle = {Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’11), Workshop on CVPR for Human Behaviour Analysis},
    month = {June},
    title = {Sparse Representations of Image Gradient Orientations for Visual Recognition and Tracking },
    year = {2011},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Sparse Representations of Image Gradient Orientations for Visual Recognition and Tracking
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%B Proceedings of IEEE Int’l Conf. Computer Vision and Pattern Recognition (CVPR-W’11), Workshop on CVPR for Human Behaviour Analysis
%D 2011
%8 June
%C Colorado Springs, USA
%F TzimiropoulosEtAlCVPR2011
%P 26-33

Audiovisual classification of vocal outbursts in human conversation using long-short-term memory networks

F. Eyben, S. Petridis, B. Schuller, G. Tzimiropoulos, S. Zafeiriou. Proceedings of IEEE Int’l Conf. Acoustics, Speech and Signal Processing (ICASSP’11). Prague, Czech Republic, pp. 5844 - 5847, May 2011.

Bibtex reference [hide]
@inproceedings{EybenEtAlICASSP2011,
    author = {F. Eyben and S. Petridis and B. Schuller and G. Tzimiropoulos and S. Zafeiriou},
    pages = {5844--5847},
    address = { Prague, Czech Republic},
    booktitle = { Proceedings of IEEE Int’l Conf. Acoustics, Speech and Signal Processing (ICASSP’11)},
    month = {May},
    title = {Audiovisual classification of vocal outbursts in human conversation using long-short-term memory networks},
    year = {2011},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Audiovisual classification of vocal outbursts in human conversation using long-short-term memory networks
%A Eyben, F.
%A Petridis, S.
%A Schuller, B.
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%B Proceedings of IEEE Int’l Conf. Acoustics, Speech and Signal Processing (ICASSP’11)
%D 2011
%8 May
%C Prague, Czech Republic
%F EybenEtAlICASSP2011
%P 5844-5847

Fast and Robust Appearance-based Tracking

S. Liwicki, S. Zafeiriou, G. Tzimiropoulos, M. Pantic. Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition (FG'11). Santa Barbara, CA, USA, pp. 507 - 513, March 2011.

Bibtex reference [hide]
@inproceedings{StephanEtAlFG2011,
    author = {S. Liwicki and S. Zafeiriou and G. Tzimiropoulos and M. Pantic},
    pages = {507--513},
    address = {Santa Barbara, CA, USA},
    booktitle = {Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition (FG'11)},
    month = {March},
    title = {Fast and Robust Appearance-based Tracking},
    year = {2011},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Fast and Robust Appearance-based Tracking
%A Liwicki, S.
%A Zafeiriou, S.
%A Tzimiropoulos, G.
%A Pantic, M.
%B Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition (FG?11)
%D 2011
%8 March
%C Santa Barbara, CA, USA
%F StephanEtAlFG2011
%P 507-513

Principal Component Analysis of Image Gradient Orientations for Face Recognition

G. Tzimiropoulos, S. Zafeiriou, M. Pantic. Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition (FG'11). Santa Barbara, CA, USA, pp. 553 - 558, March 2011.

Bibtex reference [hide]
@inproceedings{tzimiropoulosEtAlFG2011,
    author = {G. Tzimiropoulos and S. Zafeiriou and M. Pantic},
    pages = {553--558},
    address = {Santa Barbara, CA, USA},
    booktitle = {Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition (FG'11)},
    month = {March},
    title = {Principal Component Analysis of Image Gradient Orientations for Face Recognition},
    year = {2011},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Principal Component Analysis of Image Gradient Orientations for Face Recognition
%A Tzimiropoulos, G.
%A Zafeiriou, S.
%A Pantic, M.
%B Proceedings of IEEE International Conference on Automatic Face and Gesture Recognition (FG?11)
%D 2011
%8 March
%C Santa Barbara, CA, USA
%F tzimiropoulosEtAlFG2011
%P 553-558

Bidirectional relighting for 3D-aided 2D Face Recognition

G. Toderici, G. Passalis, S. Zafeiriou, G. Tzimiropoulos, M. Petrou, T. Theoharis, I. Kakadiaris. Computer Vision and Pattern Recognition (CVPR), 2010 IEEE Conference on. IEEE, pp. 2721 - 2728, 2010.

Bibtex reference [hide]
@inproceedings{toderici2010bidirectional,
    author = {G. Toderici and G. Passalis and S. Zafeiriou and G. Tzimiropoulos and M. Petrou and T. Theoharis and I. Kakadiaris},
    pages = {2721--2728},
    booktitle = {Computer Vision and Pattern Recognition (CVPR), 2010 IEEE Conference on},
    organization = {IEEE},
    title = {Bidirectional relighting for 3D-aided 2D Face Recognition},
    year = {2010},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Bidirectional relighting for 3D-aided 2D Face Recognition
%A Toderici, G.
%A Passalis, G.
%A Zafeiriou, S.
%A Tzimiropoulos, G.
%A Petrou, M.
%A Theoharis, T.
%A Kakadiaris, I.
%B Computer Vision and Pattern Recognition (CVPR), 2010 IEEE Conference on
%D 2010
%F toderici2010bidirectional
%P 2721-2728

Other publications

Fast wavelet-based pansharpening of multi-spectral images

N. Mitianoudis, G. Tzimiropoulos, T. Stathaki. Imaging Systems and Techniques (IST), 2010 IEEE International Conference on. IEEE, pp. 11 - 16, 2010.

Bibtex reference [hide]
@conference{mitianoudis2010fast,
    author = {N. Mitianoudis and G. Tzimiropoulos and T. Stathaki},
    pages = {11--16},
    booktitle = {Imaging Systems and Techniques (IST), 2010 IEEE International Conference on},
    organization = {IEEE},
    title = {Fast wavelet-based pansharpening of multi-spectral images},
    year = {2010},
}
Endnote reference [hide]
%0 Journal Article
%T Fast wavelet-based pansharpening of multi-spectral images
%A Mitianoudis, N.
%A Tzimiropoulos, G.
%A Stathaki, T.
%D 2010
%F mitianoudis2010fast
%P 11-16

A new penalty term for the BIC with respect to speaker diarization

T. Stafylakis, G. Tzimiropoulos, V. Katsouros, G. Carayannis. Acoustics Speech and Signal Processing (ICASSP), 2010 IEEE International Conference on. IEEE, pp. 4978 - 4981, 2010.

Bibtex reference [hide]
@conference{stafylakis2010new,
    author = {T. Stafylakis and G. Tzimiropoulos and V. Katsouros and G. Carayannis},
    pages = {4978--4981},
    booktitle = {Acoustics Speech and Signal Processing (ICASSP), 2010 IEEE International Conference on},
    organization = {IEEE},
    title = {A new penalty term for the BIC with respect to speaker diarization},
    year = {2010},
}
Endnote reference [hide]
%0 Journal Article
%T A new penalty term for the BIC with respect to speaker diarization
%A Stafylakis, T.
%A Tzimiropoulos, G.
%A Katsouros, V.
%A Carayannis, G.
%D 2010
%F stafylakis2010new
%P 4978-4981

FFT-based estimation of large motions in images: A robust gradient-based approach

G. Tzimiropoulos, V. Argyriou, T. Stathaki. Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on. IEEE, pp. 969 - 972, 2009.

Bibtex reference [hide]
@conference{tzimiropoulos2009fft,
    author = {G. Tzimiropoulos and V. Argyriou and T. Stathaki},
    pages = {969--972},
    booktitle = {Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on},
    organization = {IEEE},
    title = {FFT-based estimation of large motions in images: A robust gradient-based approach},
    year = {2009},
}
Endnote reference [hide]
%0 Journal Article
%T FFT-based estimation of large motions in images: A robust gradient-based approach
%A Tzimiropoulos, G.
%A Argyriou, V.
%A Stathaki, T.
%D 2009
%F tzimiropoulos2009fft
%P 969-972

A Frequency Domain Approach to Roto-translation Estimation using Gradient Cross-Correlation

G. Tzimiropoulos, V. Argyriou, T. Stathaki. Citeseer, 2008.

Bibtex reference [hide]
@conference{tzimiropoulos2008frequency,
    author = {G. Tzimiropoulos and V. Argyriou and T. Stathaki},
    publisher = {Citeseer},
    title = {A Frequency Domain Approach to Roto-translation Estimation using Gradient Cross-Correlation},
    year = {2008},
}
Endnote reference [hide]
%0 Journal Article
%T A Frequency Domain Approach to Roto-translation Estimation using Gradient Cross-Correlation
%A Tzimiropoulos, G.
%A Argyriou, V.
%A Stathaki, T.
%D 2008
%I Citeseer
%F tzimiropoulos2008frequency

Symmetry detection using frequency domain motion estimation techniques

G. Tzimiropoulos, V. Argyriou, T. Stathaki. Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on. IEEE, pp. 861 - 864, 2008.

Bibtex reference [hide]
@conference{tzimiropoulos2008symmetry,
    author = {G. Tzimiropoulos and V. Argyriou and T. Stathaki},
    pages = {861--864},
    booktitle = {Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on},
    organization = {IEEE},
    title = {Symmetry detection using frequency domain motion estimation techniques},
    year = {2008},
}
Endnote reference [hide]
%0 Journal Article
%T Symmetry detection using frequency domain motion estimation techniques
%A Tzimiropoulos, G.
%A Argyriou, V.
%A Stathaki, T.
%D 2008
%F tzimiropoulos2008symmetry
%P 861-864

An Affine Invariant Function using PCA Bases with an Application to Within-Class Object Recognition

G. Tzimiropoulos, N. Mitianoudis, T. Stathaki. Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on. IEEE, 1: 2007.

Bibtex reference [hide]
@conference{tzimiropoulos2007affine,
    author = {G. Tzimiropoulos and N. Mitianoudis and T. Stathaki},
    booktitle = {Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on},
    organization = {IEEE},
    title = {An Affine Invariant Function using PCA Bases with an Application to Within-Class Object Recognition},
    volume = {1},
    year = {2007},
}
Endnote reference [hide]
%0 Journal Article
%T An Affine Invariant Function using PCA Bases with an Application to Within-Class Object Recognition
%A Tzimiropoulos, G.
%A Mitianoudis, N.
%A Stathaki, T.
%D 2007
%V 1
%F tzimiropoulos2007affine