- Bounareli, S., Tzelepis, C., Argyriou, V., Patras, I. and Tzimiropoulos, G. (2024). One-Shot Neural Face Reenactment via Finding Directions in GAN’s Latent Space. International Journal of Computer Vision. doi:10.1007/s11263-024-02018-6.
- Kordopatis-Zilos, G., Tzelepis, C., Papadopoulos, S., Kompatsiaris, I. and Patras, I. (2022). DnS: Distill-and-Select for Efficient and Accurate Video Indexing and Retrieval. International Journal of Computer Vision, 130(10), pp. 2385–2407. doi:10.1007/s11263-022-01651-3.
- Mou, W., Tzelepis, C., Mezaris, V., Gunes, H. and Patras, I. (2019). A deep generic to specific recognition model for group membership analysis using non-verbal cues. Image and Vision Computing, 81, pp. 42–50. doi:10.1016/j.imavis.2018.09.005.
- Tzelepis, C., Mezaris, V. and Patras, I. (2017). Linear Maximum Margin Classifier for Learning from Uncertain Data. IEEE Transactions on Pattern Analysis and Machine Intelligence, 40(12), pp. 2948–2962. doi:10.1109/tpami.2017.2772235.
- Tzelepis, C., Galanopoulos, D., Mezaris, V. and Patras, I. (2016). Learning to detect video events from zero or very few video examples. Image and Vision Computing, 53, pp. 35–44. doi:10.1016/j.imavis.2015.09.005.
- Tzelepis, C., Ma, Z., Mezaris, V., Ionescu, B., Kompatsiaris, I., Boato, G. … Yan, S. (2016). Event-based media processing and analysis: A survey of the literature. Image and Vision Computing, 53, pp. 3–19. doi:10.1016/j.imavis.2016.05.005.
Contact details
Address
Dr Christos Tzelepis
City, University of London
Northampton Square
London EC1V 0HB
United Kingdom
Northampton Square
London EC1V 0HB
United Kingdom
Personal links
About
Overview
Dr Christos Tzelepis is a Lecturer in Computer Science at City, University of London, and a member of the Artificial Intelligence Research Centre (CitAI). Prior to that, he was a post-doctoral researcher at Queen Mary, University of London, working with Prof. Ioannis (Yiannis) Patras and Dr. Georgios (Yorgos) Tzimiropoulos. He received the Diploma degree in Electrical and Computer Engineering from Aristotle University of Thessaloniki, Greece, and the Ph.D. degree in Machine Learning and Computer Vision from Queen Mary University of London.
Qualifications
- PhD, Queen Mary, University of London, United Kingdom, Jan 2014 – Jun 2018
- Diploma in Electical and Computer Engineering, Aristotle University of Thessaloniki, Greece, Sep 2005 – Jul 2011
Publications
Featured publications
- Oldfield, J., Tzelepis, C., Panagakis, Y., Nicolaou, M. and Patras, I. (2023). Parts of Speech–Grounded Subspaces in Vision-Language Models. Conference on Neural Information Processing Systems (NeurIPS) 10-16 December, New Orleans, Louisiana, United States of America.
- Bounareli, S., Tzelepis, C., Argyriou, V., Patras, I. and Tzimiropoulos, G. (2023). HyperReenact: One-Shot Reenactment via Jointly Learning to Refine and Retarget Faces. 2023 IEEE/CVF International Conference on Computer Vision (ICCV) 1-6 October. doi:10.1109/iccv51070.2023.00657
- Barattin, S., Tzelepis, C., Patras, I. and Sebe, N. (2023). Attribute-Preserving Face Dataset Anonymization via Latent Code Optimization. 2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 17-24 June, Vancouver, Canada. doi:10.1109/cvpr52729.2023.00773
- Kordopatis-Zilos, G., Tolias, G., Tzelepis, C., Kompatsiaris, I., Patras, I. and Papadopoulos, S. (2023). Self-Supervised Video Similarity Learning. 2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW) 17-24 June. doi:10.1109/cvprw59228.2023.00504
- Bounareli, S., Tzelepis, C., Argyriou, V., Patras, I. and Tzimiropoulos, G. (2023). StyleMask: Disentangling the Style Space of StyleGAN2 for Neural Face Reenactment. 2023 IEEE 17th International Conference on Automatic Face and Gesture Recognition (FG) 5-8 January. doi:10.1109/fg57933.2023.10042744
- Oldfield, J., Tzelepis, C., Panagakis, Y., Nicolaou, M. and Patras, I. (2023). PandA: Unsupervised Learning of Parts and Appearances in the Feature Maps of GANs. International Conference on Learning Representations (ICLR).
- Tzelepis, C., Tzimiropoulos, G. and Patras, I. (2021). WarpedGANSpace: Finding non-linear RBF paths in GAN latent space. 2021 IEEE/CVF International Conference on Computer Vision (ICCV) 10-17 October. doi:10.1109/iccv48922.2021.00633
Publications by category
Chapters (3)
- Markatopoulou, F., Galanopoulos, D., Tzelepis, C., Mezaris, V. and Patras, I. (2019). Concept‐Based and Event‐Based Video Search in Large Video Collections. (pp. 31–60). Wiley. ISBN 978-1-119-37697-2.
- Apostolidis, K., Markatopoulou, F., Tzelepis, C., Mezaris, V. and Patras, I. (2018). Multimedia Processing Essentials. Personal Multimedia Preservation (pp. 47–98). Springer International Publishing. ISBN 978-3-319-73464-4.
- Tzelepis, C., Mezaris, V. and Patras, I. (2016). Video Event Detection Using Kernel Support Vector Machine with Isotropic Gaussian Sample Uncertainty (KSVM-iGSU). MultiMedia Modeling (pp. 3–15). Springer International Publishing. ISBN 978-3-319-27670-0.
Conference papers and proceedings (13)
- Naval Marimont, S., Baugh, M., Siomos, V., Tzelepis, C., Kainz, B. and Tarroni, G. (2024). DISYRE: Diffusion-Inspired SYnthetic REstoration for Unsupervised Anomaly Detection. IEEE International Symposium on Biomedical Imaging 2024 27-30 May, Athens, Greece.
- D'Incà, M., Tzelepis, C., Patras, I. and Sebe, N. (2024). Improving Fairness using Vision-Language Driven Image Augmentation. 2024 IEEE/CVF Winter Conference on Applications of Computer Vision (WACV) 4-8 January, Waikoloa, Hawaii.
- Yang, Q., Tzelepis, C., Nikolenko, S., Patras, I. and Farseev, A. (2023). "Just To See You Smile": SMILEY, a Voice-Guided <strike>GUY</strike> GAN. WSDM '23: The Sixteenth ACM International Conference on Web Search and Data Mining. doi:10.1145/3539597.3573031
- Foteinopoulou, N.M., Tzelepis, C. and Patras, I. (2021). Estimating continuous affect with label uncertainty. 2021 9th International Conference on Affective Computing and Intelligent Interaction (ACII) 28 Sep 2021 – 1 Oct 2021. doi:10.1109/acii52823.2021.9597425
- Xie, T.-.T., Tzelepis, C., Fu, F. and Patras, I. (2021). Few-Shot Action Localization without Knowing Boundaries. ICMR '21: International Conference on Multimedia Retrieval. doi:10.1145/3460426.3463643
- Markatopoulou, F., Ioannidou, A., Tzelepis, C., Mironidis, T., Galanopoulos, D., Arestis-Chartampilas, S. … Patras, I. (2020). ITI-CERTH participation to TRECVID 2015.
- Mou, W., Tzelepis, C., Mezaris, V., Gunes, H. and Patras, I. (2017). Generic to Specific Recognition Models for Membership Analysis in Group Videos. 2017 12th IEEE International Conference on Automatic Face & Gesture Recognition (FG 2017) 30 May 2017 – 3 Jun 2017. doi:10.1109/fg.2017.69
- Tzelepis, C., Mavridaki, E., Mezaris, V. and Patras, I. (2016). Video aesthetic quality assessment using kernel Support Vector Machine with isotropic Gaussian sample uncertainty (KSVM-IGSU). 2016 IEEE International Conference on Image Processing (ICIP) 25-28 September. doi:10.1109/icip.2016.7532791
- Markatopoulou, F., Loannidou, A., Tzelepis, C., Mironidis, T., Galanopoulos, D., Arestis-Chartampilas, S. … Patras, L. (2015). ITI-CERTH participation to TRECVID 2015.
- Tzelepis, C., Galanopoulos, D., Arestis-Chartampilas, S., Gkalelis, N. and Mezaris, V. (2015). ITI-CERTH in TRECVID 2015 multimedia event detection.
- Tzelepis, C., Gkalelis, N., Mezaris, V. and Kompatsiaris, I. (2013). Improving event detection using related videos and relevance degree support vector machines. MM '13: ACM Multimedia Conference. doi:10.1145/2502081.2502176
- Markatopoulou, F., Moumtzidou, A., Tzelepis, C., Avgerinakis, K., Gkalelis, N., Vrochidis, S. … Kompatsiaris, I. (2013). ITI-CERTH participation to TRECVID 2013.
- Markatopoulou, F., Moumtzidou, A., Tzelepis, C., Avgerinakis, K., Gkalelis, N., Vrochidis, S. … Kompatsiaris, I. (2013). ITI-CERTH participation to TRECVID 2013.
Journal articles (6)
Report
- Tzelepis, C. and Patras, I. Uncertainty Propagation in Convolutional Neural Networks: Technical Report..