Stephan Liwicki

Dr. Stephan Liwicki

Position:

Past Member

New Position:

Research Engineer Toshiba Research Cambridge

Email:

Personal website:

http://www.liwicki.uk/

Biography

Stephan Liwicki received the B. Sc. (Hons) degree in Computer Science with Artificial Intelligence from the University of Leeds, United Kingdom, as best student of the course in 2009, and the M. Phil. degree in Computer Speech, Text and Internet Technology from the University of Cambridge, United Kingdom, in 2010. In summer 2010, he joined the Imperial College London, United Kingdom, as a Research Assistant, and in autumn 2010, Stephan Liwicki started his EPSRC funded studies for the Ph. D. degree at Imperial in the field of computer vision under the supervision of Prof. Maja Pantic and Dr Stefanos Zafeiriou.

His research targets robust incremental subspace learning algorithms with an application to human behaviour analysis. Currently, he develops tracking algorithms based on online learning approaches for kernel Principal Component Analysis which incrementally update the Eigenspectrum of the appearance model. For this, he designs and utilises kernels, which are both fast and robust to intrinsic and extrinsic changes, for real-time visual tracking of faces.

Publications

Journal articles

Online Kernel Slow Feature Analysis for Temporal Video Segmentation and Tracking

S. Liwicki, S. Zafeiriou, M. Pantic. IEEE Transactions on Image Processing. October 2015.

Bibtex reference [hide]
@article{onlineSFA2016,
    author = {S. Liwicki and S. Zafeiriou and M. Pantic},
    journal = {IEEE Transactions on Image Processing},
    month = {October},
    title = {Online Kernel Slow Feature Analysis for Temporal Video Segmentation and Tracking},
    year = {2015},
}
Endnote reference [hide]
%0 Journal Article
%T Online Kernel Slow Feature Analysis for Temporal Video Segmentation and Tracking
%A Liwicki, S.
%A Zafeiriou, S.
%A Pantic, M.
%J IEEE Transactions on Image Processing
%D 2015
%8 October
%F onlineSFA2016

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

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

Conference articles

Full-Angle Quaternions for Robustly Matching Vectors of 3D Rotations

S. Liwicki, M. Pham, S. Zafeiriou, M. Pantic, B. Stenger. Proceedings of IEEE Int’l Conf. on Computer Vision & Pattern Recognition. 2014.

Bibtex reference [hide]
@inproceedings{Quaternios_2014,
    author = {S. Liwicki and M. Pham and S. Zafeiriou and M. Pantic and B. Stenger},
    booktitle = {Proceedings of IEEE Int’l Conf. on Computer Vision & Pattern Recognition},
    title = {Full-Angle Quaternions for Robustly Matching Vectors of 3D Rotations},
    year = {2014},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Full-Angle Quaternions for Robustly Matching Vectors of 3D Rotations
%A Liwicki, S.
%A Pham, M.
%A Zafeiriou, S.
%A Pantic, M.
%A Stenger, B.
%B Proceedings of IEEE Int’l Conf. on Computer Vision & Pattern Recognition
%D 2014
%F Quaternios_2014

Incremental Slow Feature Analysis with Indefinite Kernel for Online Temporal Video Segmentation

S. Liwicki, S. Zafeiriou, M. Pantic. 11th Asian Conference on Computer Vision (ACCV 2012). Daejeon, Korea, pp. 162 - 176, November 2012.

Bibtex reference [hide]
@inproceedings{liwicki2012accv,
    author = {S. Liwicki and S. Zafeiriou and M. Pantic},
    pages = {162--176},
    address = {Daejeon, Korea},
    booktitle = {11th Asian Conference on Computer Vision (ACCV 2012)},
    month = {November},
    title = {Incremental Slow Feature Analysis with Indefinite Kernel for Online Temporal Video Segmentation},
    year = {2012},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Incremental Slow Feature Analysis with Indefinite Kernel for Online Temporal Video Segmentation
%A Liwicki, S.
%A Zafeiriou, S.
%A Pantic, M.
%B 11th Asian Conference on Computer Vision (ACCV 2012)
%D 2012
%8 November
%C Daejeon, Korea
%F liwicki2012accv
%P 162-176

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

Automatic recognition of fingerspelled words in British Sign Language

S. Liwicki, M. Everingham. Proceedings of the 2nd IEEE Workshop on CVPR for Human Communicative Behavior Analysis (CVPR4HB'09), in conjunction with CVPR2009. IEEE Computer Society, Los Alamitos, CA, USA, pp. 50 - 57, 2009.

Bibtex reference [hide]
@inproceedings{10_1109_CVPR_009_5204291,
    author = {S. Liwicki and M. Everingham},
    pages = {50--57},
    address = {Los Alamitos, CA, USA},
    booktitle = {Proceedings of the 2nd IEEE Workshop on CVPR for Human Communicative Behavior Analysis (CVPR4HB'09), in conjunction with CVPR2009},
    publisher = {IEEE Computer Society},
    title = {Automatic recognition of fingerspelled words in British Sign Language},
    year = {2009},
}
Endnote reference [hide]
%0 Conference Proceedings
%T Automatic recognition of fingerspelled words in British Sign Language
%A Liwicki, S.
%A Everingham, M.
%B Proceedings of the 2nd IEEE Workshop on CVPR for Human Communicative Behavior Analysis (CVPR4HB?09), in conjunction with CVPR2009
%D 2009
%I IEEE Computer Society
%C Los Alamitos, CA, USA
%F ref10_1109_CVPR_009_5204291
%P 50-57