Article

Asthana, A., Zafeiriou, S., Tzimiropoulos, Georgios, Cheng, S. and Pantic, M. (2015) From pixels to response maps: discriminative image filtering for face alignment in the wild. IEEE Transactions on Pattern Analysis and Machine Intelligence, 37 (6). pp. 1312-1320. ISSN 0162-8828

Bazyari, Farhad and Tzimiropoulos, Georgios (2015) An active patch model for real world appearance reconstruction. Lecture Notes in Computer Science, 8925 . pp. 443-456. ISSN 0302-9743

Marras, I., Tzimiropoulos, Georgios, Zafeiriou, S. and Pantic, M. (2014) Online learning and fusion of orientation appearance models for robust rigid object tracking. Image and vision computing, 32 (10). pp. 707-727. ISSN 0262-8856

Tzimiropoulos, Georgios, Alabort-I-Medina, Joan, Zafeiriou, Stefanos and Pantic, Maja (2013) Generic active appearance models revisited. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 7726 L (PART 3). pp. 650-663. ISSN 0302-9743

Liwicki, Stephan, Tzimiropoulos, Georgios, Zafeiriou, Stefanos and Pantic, Maja (2013) Euler principal component analysis. International Journal of Computer Vision, 101 (3). pp. 498-518. ISSN 0920-5691

Tzimiropoulos, Georgios, Stefanos, Zafeiriou and Maja, Pantic (2012) Subspace learning from image gradient orientations. IEEE Transactions on Pattern Analysis and Machine Intelligence, 34 (12). pp. 2454-2466. ISSN 0162-8828

Liwicki, Stephan, Zafeiriou, Stefanos, Tzimiropoulos, Georgios and Pantic, Maja (2012) Efficient online subspace learning with an indefinite kernel for visual tracking and recognition. IEEE Transactions on Neural Networks and Learning Systems, 23 (10). pp. 1624-1636. ISSN 2162-237X

Marras, I., Zafeiriou, S. and Tzimiropoulos, Georgios (2012) Robust learning from normals for 3D face recognition. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 7584 L (PART 2). pp. 230-239. ISSN 0302-9743

Zafeiriou, Stefanos, Tzimiropoulos, Georgios, Stathaki, Tania and Petrou, Maria (2012) Regularized kernel discriminant analysis with a robust kernel for face recognition and verification. IEEE Transactions on Neural Networks and Learning Systems, 23 (3). pp. 526-534. ISSN 2162-237X

Tzimiropoulos, Georgios, Argyriou, V. and Stathaki, T. (2011) Subpixel registration with gradient correlation. IEEE Transactions on Image Processing, 20 (6). pp. 1761-1767. ISSN 1057-7149

Tzimiropoulos, Georgios, Argyriou, Vasilis, Zafeiriou, Stefanos and Stathaki, Tania (2010) Robust fft-based scale-invariant image registration with image gradients. IEEE Transactions on Pattern Analysis and Machine Intelligence, 32 (10). pp. 1899-1906. ISSN 0162-8828

Tzimiropoulos, G., Mitianoudis, N. and Stathaki, T. (2009) A unifying approach to moment-based shape orientation and symmetry classification. IEEE Transactions on Image Processing, 18 (1). pp. 125-139. ISSN 1057-7149

Tzimiropoulos, G., Mitianoudis, N. and Stathaki, T. (2007) Robust recognition of planar shapes under affine transforms using principal component analysis. IEEE Signal Processing Letters, 14 (10). pp. 723-726. ISSN 1070-9908

Conference or Workshop contribution

Kossaifi, J., Tzimiropoulos, G. and Pantic, M. (2014) Fast Newton active appearance models. In: IEEE International Conference on Image Processing, 27 - 30 October 2014, La Defense, Paris.

Sagonas, C., Tzimiropoulos, Georgios, Zafeiriou, S. and Pantic, M (2013) A semi-automatic methodology for facial landmark annotation. In: IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, 23 - 28 June 2013, Portland, OR; United States.

Marras, I., Medina, J. A., Tzimiropoulos, G., Zafeiriou, S. and Pantic, M. (2013) Online learning and fusion of orientation appearance models for robust rigid object tracking. In: 10th IEEE International Conference and Workshops on Automatic Face and Gesture Recognition (FG), 22 - 26 April 2013, Shanghai.

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 Nov. 2011, Barcelona.

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

Tzimiropoulos, Georgios, Zafeiriou, S. and Pantic, M. (2011) Sparse representations of image gradient orientations for visual recognition and tracking. In: Conference of 2011 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, CVPRW 2011, 20-25 June 2011, Colorado Springs.

Zafeiriou, S., Tzimiropoulos, Georgios and Pantic, M. (2011) Subspace analysis of arbitrarily many linear filter responses with an application to face tracking. In: Conference of 2011 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, CVPRW 2011, 20-25 June 2011, Colorado Springs.

Eyben, F., Petridis, S., Schuller, B., Tzimiropoulos, Georgios, Zafeiriou, S. and Pantic, M. (2011) Audiovisual classification of vocal outbursts in human conversation using long-short-term memory networks. In: Conference of 36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011, 22-27 May 2011, Prague.

Liwicki, S., Zafeiriou, S., Tzimiropoulos, Georgios and Pantic, M. (2011) Fast and robust appearance-based tracking. In: Conference of 2011 IEEE International Conference on Automatic Face and Gesture Recognition and Workshops, FG 2011, 21-25 March 2011, Santa Barbara, CA.

Tzimiropoulos, Georgios, Zafeiriou, S. and Pantic, M. (2011) Principal component analysis of image gradient orientations for face recognition. In: Conference of 2011 IEEE International Conference on Automatic Face and Gesture Recognition and Workshops, FG 2011, 21-25 March 2011, Santa Barbara, CA.

Mitianoudis, N., Tzimiropoulos, Georgios and Stathai, T. (2010) Fast wavelet-based pansharpening of multi-spectral images. In: IEEE International Conference on Imaging Systems and Techniques, 1 -2 July 2010, Thessaloniki.

Toderici, G., Passalis, G., Zafeiriou, S., Tzimiropoulos, G., Petrou, M., Theoharis, T. and Kakadiaris, I. A. (2010) Bidirectional relighting for 3D-aided 2D face recognition. In: IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 13 - 18 June 2010, San Francisco, CA.

Stafylakis, T., Tzimiropoulos, G., Katsouros, V. and Carayannis, G. (2010) A new penalty term for the BIC with respect to speaker diarization. In: IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP, 14 -19 March 2010, Dallas, Texas.

Tzimiropoulos, Georgios, Argyriou, V. and Stathaki, T. (2009) FFT-based estimation of large motions in images: a robust gradient-based approach. In: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing, 19 - 24 April 2009, Taipei.

Tzimiropoulos, Georgios, Argyriou, V. and Stathaki, T. (2008) Symmetry detection using frequency domain motion estimation techniques. In: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing, 31 March - 4 April 2008, Las Vegas, Nevada.

Tzimiropoulos, Georgios, Mitianoudis, N. and Stathaki, T. (2007) An affine invariant function using PCA bases with an application to within-class object recognition. In: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing, 15 - 20 April 2007.