Dr. Stephan Liwicki
Past Member
Research Engineer Toshiba Research Cambridge
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.
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},
}
%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.
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},
}
%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.
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},
}
%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.
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},
}
%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.
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},
}
%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.
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},
}
%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.
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},
}
%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