Staff profile

I am an Associate Professor and member of the VIViD Group at the Department of Computer Science at Durham University. My primary research interests lie in the field of computer graphics, in particular applied visual perception to rendering and display hardware, with a strong focus on near-eye displays and virtual reality. 

Before joining Durham in 2018, I was a post-doctoral researcher at Inria, France, team GraphDeco, and visiting scholar at UC Berkeley Vision Science, USA, working on near-eye, stereo displays. 

Google Scholar Profile

Current Teaching

L3 Virtual and Augmented Reality

L4 Advanced Computer Graphics & Visualisation

L3 & L4 Final Year Project Supervision

• Computer Graphics
• Displays
• Virtual Reality
• Visual Perception

Conference Paper

• Polychronakis, A., Koulieris, G. A., & Mania, K. (2023, December). An Inverted Pyramid Acceleration Structure Guiding Foveated Sphere Tracing for Implicit Surfaces in VR. Presented at Eurographics Symposium on Rendering
• Drakopoulos, P., Koulieris, G. A., & Mania, K. (2020, December). Front Camera Eye Tracking For Mobile VR. Presented at 2020 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW)
• Zhong, F., Koulieris, G. A., Drettakis, G., Banks, M. S., Chambe, M., Durand, F., & Mantiuk, R. (2019, December). DiCE: dichoptic contrast enhancement for binocular displays. Presented at ACM SIGGRAPH 2019 Posters on - SIGGRAPH '19
• Sibrina, D., Bethapudi, S., & Koulieris, G. A. (2023, March). A Virtual Reality System for the Assessment of Patients with Lower Limb Rotational Abnormalities. Presented at 2023 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW), Shanghai, China
• Chang, Z., Koulieris, G. A., & Shum, H. P. (2022, November). 3D Reconstruction of Sculptures from Single Images via Unsupervised Domain Adaptation on Implicit Models. Presented at VRST '22: 28th ACM Symposium on Virtual Reality Software and Technology, Japan
• Roice, K., & Koulieris, G. A. (2022, August). RHapTor: Rendering Haptic Torques for Virtual Reality. Presented at SIGGRAPH '22: Special Interest Group on Computer Graphics and Interactive Techniques Conference, Vancouver, Canada
• Polychronakis, A., Koulieris, G. A., & Mania, K. (2021, November). Emulating Foveated Path Tracing. Presented at ACM SIGGRAPH Conference on Motion, Interaction and Games, Virtual
• Koulieris, G.-A., Aksit, K., Richardt, C., & Mantiuk, R. (2018, December). Cutting-Edge VR/AR Display Technologies (Gaze-, Accommodation-, Motion-aware and HDR-enabled). Presented at The 11th ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia., Tokyo, Japan
• Koulieris, G.-A., Akşit, K., Richardt, C., Mantiuk, R., & Mania, K. (2018, March). Cutting-Edge VR/AR Display Technologies (Gaze-, Accommodation-, Motion-aware and HDR-enabled). Presented at IEEE VR 2018: 25th IEEE Conference on Virtual Reality and 3D User Interfaces., Reutlingen, Germany
• Patney, A., Zannoli, M., Koulieris, G.-A., Kim, J., Wetzstein, G., & Steinicke, F. (2023, July). Applications of visual perception to virtual reality rendering. Presented at ACM SIGGRAPH 2017 Courses, Los Angeles, California, USA
• Banks, M. S., Johnson, P., Kim, J., Koulieris, G. A., Drettakis, G., & Gordon, L. (2017, April). Focus-tunable and fixed lenses and stereoscopic 3D displays (Conference Presentation). Presented at Emerging Liquid Crystal Technologies XII, San Francisco, California
• Koulieris, G., Drettakis, G., Cunningham, D., & Mania, K. (2016, March). Gaze Prediction using Machine Learning for Dynamic Stereo Manipulation in Games. Presented at IEEE VR 2016 IEEE, Greenville, South Carolina, USA
• Sidorakis, N., Koulieris, G. A., & Mania, K. (2015, March). Binocular eye-tracking for the control of a 3D immersive multimedia user interface. Presented at Everyday Virtual Reality (WEVR), 2015 IEEE 1st Workshop on IEEE, Arles, Camargue, Provence, France
• Koulieris, G. A., Drettakis, G., Cunningham, D., & Mania, K. (2014, August). High level saliency prediction for smart game balancing. Presented at ACM SIGGRAPH 2014 Talks ACM, Vancouver, Canada
• Koulieris, G. A., Drettakis, G., Cunningham, D., Sidorakis, N., & Mania, K. (2014, August). Context-aware material selective rendering for mobile graphics. Presented at ACM SIGGRAPH 2014 Posters (SIGGRAPH '14)., Vancouver, Canada
• McNamara, A., Mania, K., Koulieris, G. A., & Itti, L. (2014, August). Attention-aware rendering, mobile graphics and games. Presented at SIGGRAPH 2014 Courses, Vancouver, Canada
• Paraskeva, C., Koulieris, G. A., Coxon, M., & Mania, K. (2012, December). Gender differences in spatial awareness in immersive virtual environments: a preliminary investigation. Presented at Proceedings of the 11th ACM SIGGRAPH International Conference on Virtual-Reality Continuum and its Applications in Industry ACM, Singapore

Doctoral Thesis

• Koulieris, G. A. (2015). Context-aware Gaze Prediction applied to Game Level Design, Level-of-Detail and Stereo Manipulation. (Thesis). Technical University of Crete, Department of Electronic and Computer Enginneering. https://durham-repository.worktribe.com/output/1647290

Journal Article

• Vera, J., Redondo, B., Martínez‐Tovar, J. M., Molina, R., Koulieris, G. A., Allen, P. M., & Jiménez, R. (2023). Effect of manipulating the vergence/accommodation and image size mismatches of the ±2D flipper test on the frequency and precision of accommodative facility. Ophthalmic and Physiological Optics, 43(4), 660-667. https://doi.org/10.1111/opo.13136
• Vera, J., Redondo, B., Koulieris, G.-A., Jiménez, R., & García-Ramos, A. (2023). Effect of wearing different types of face masks during dynamic and isometric resistance training on intraocular pressure. Clinical and Experimental Optometry, 106(5), 503-508. https://doi.org/10.1080/08164622.2022.2054315
• Aizenman, A., Koulieris, G.-A., Gibaldi, A., Sehgal, V., Levi, D., & Banks, M. S. (2023). The Statistics of Eye Movements and Binocular Disparities during VR Gaming: Implications for Headset Design. ACM Transactions on Graphics, 42(1), Article 7. https://doi.org/10.1145/3549529
• Vera, J., Redondo, B., Galan, T., Machado, P., Molina, R., Koulieris, G.-A., & Jiménez, R. (2023). Dynamics of the accommodative response and facility with dual-focus soft contact lenses for myopia control. Contact Lens & Anterior Eye, 46(1), Article 101526. https://doi.org/10.1016/j.clae.2021.101526
• Sibrina, D., Bethapudi, S., & Koulieris, G. A. (2023). OrthopedVR: clinical assessment and pre-operative planning of paediatric patients with lower limb rotational abnormalities in virtual reality. Visual Computer, 39, 3621–3633. https://doi.org/10.1007/s00371-023-02949-0
• Vera, J., Redondo, B., Koulieris, G.-A., Molina, R., & Jiménez, R. (2022). Examining the Validity of a New Method for the Objective Assessment of Binocular Accommodative Facility (2Q-AF Test): A Comparison with ± 2.00 DS Lens Flippers. Current Eye Research, 47(1), 62-68. https://doi.org/10.1080/02713683.2021.1962359
• Redondo, B., Vera, J., Koulieris, G.-A., Molina-Romero, R., & Jiménez, R. (2022). Short-term effects of caffeine intake on binocular accommodative facility: a quantitative and qualitative analysis. Clinical and Experimental Optometry, 105(5), 534-538. https://doi.org/10.1080/08164622.2021.1935218
• Drakopoulos, P., Koulieris, G.-A., & Mania, K. (2021). Eye Tracking Interaction on Unmodified Mobile VR Headsets Using the Selfie Camera. ACM Transactions on Applied Perception, 18(3), 1-20. https://doi.org/10.1145/3456875
• Vera, J., Redondo, B., Perez-Castilla, A., Koulieris, G.-A., Jiménez, R., & Garcia-Ramos, A. (2021). The intraocular pressure response to lower-body and upper-body isometric exercises is affected by the breathing pattern. European Journal of Sport Science, 21(6), 879-886. https://doi.org/10.1080/17461391.2020.1790670
• Vera, J., Redondo, B., Koulieris, G.-A., Torrejon, A., Jiménez, R., & Garcia-Ramos, A. (2020). Intraocular Pressure Responses to Four Different Isometric Exercises in Men and Women. Optometry and Vision Science, 97(8), 648-653. https://doi.org/10.1097/opx.0000000000001545
• Vera, J., Redondo, B., Molina, R., Koulieris, G.-A., & Jiménez, R. (2020). Validation of an Objective Method for the Qualitative and Quantitative Assessment of Binocular Accommodative Facility. Current Eye Research, 45(5), 636-644. https://doi.org/10.1080/02713683.2019.1688837
• Zhong, F., Koulieris, G.-A., Drettakis, G., Banks, M. S., Chambe, M., Durand, F., & Mantiuk, R. (2019). DiCE: Dichoptic Contrast Enhancement for VR and Stereo Displays. ACM Transactions on Graphics, 38(6), Article 211. https://doi.org/10.1145/3355089.3356552
• Vera, J., Raimundo, J., García-Durán, B., Pérez-Castilla, A., Redondo, B., Delgado, G., Koulieris, G.-A., & García-Ramos, A. (2019). Acute intraocular pressure changes during isometric exercise and recovery: The influence of exercise type and intensity, and participant´s sex. Journal of Sports Sciences, 37(19), 2213-2219. https://doi.org/10.1080/02640414.2019.1626072
• Koulieris, G., Aksit, K., Stengel, M., Mantiuk, R., Mania, K., & Richardt, C. (2019). Near‐Eye Display and Tracking Technologies for Virtual and Augmented Reality. Computer Graphics Forum, 38(2), 493-519. https://doi.org/10.1111/cgf.13654
• Vera, J., Jiménez, R., Redondo, B., Torrejón, A., Koulieris, G. A., Gustavo de Moraes, C., & García-Ramos, A. (2019). Investigating the Immediate and Cumulative Effects of Isometric Squat Exercise for Different Weight Loads on Intraocular Pressure: A Pilot Study. Sports Health, 11(3), 247-253. https://doi.org/10.1177/1941738119834985
• Koulieris, G.-A., Bui, B., Banks, M. S., & Drettakis, G. (2017). Accommodation and comfort in head-mounted displays. ACM Transactions on Graphics, 36(4), Article 87. https://doi.org/10.1145/3072959.3073622
• Koulieris, G. A., Drettakis, G., Cunningham, D., & Mania, K. (2015). An Automated High-Level Saliency Predictor for Smart Game Balancing. ACM Transactions on Applied Perception, 11(4), Article 17. https://doi.org/10.1145/2637479
• Koulieris, G. A., Drettakis, G., Cunningham, D., & Mania, K. (2014). C-LOD: Context-aware Material Level-of-Detail applied to Mobile Graphics. Computer Graphics Forum, 33(4), 41-49. https://doi.org/10.1111/cgf.12411

Presentation

• Sibrina, D., Novysedlak, R., Kolarik, J., Lischke, R., & Koulieris, G. A. (2024, July). Fitting Room: Lung Transplantation Donor-Recipient Size-matching in Virtual Reality. Poster presented at SIGGRAPH '24: Special Interest Group on Computer Graphics and Interactive Techniques Conference, Denver CO USA