George Georgis, Ph.D.
Electronics Lab,
Physics Bldg. IV,
Department of Physics,
Panepistimiopolis,
157-84 Athens
ggeorgis(at)phys.uoa.gr
About
- 2003 - B.Sc. Physics, Physics Department, Aristotle University of Thessaloniki. Major : Electronics and Telecommunications. Thesis : "Design, Implementation and Synthesis of a CISC Processor".
- 2009 - M.Sc. Electronic Automation, Physics Department, National and Kapodistrian University of Athens. Thesis : "Interpolation and Motion Estimation Algorithms for the H.264/AVC Standard".
- 2016 - Ph.D. Physics Department, National and Kapodistrian University of Athens. Thesis : "Parallel Processes and Applications in Image and Video Processing".
Research Interests
- Image / Video Processing Algorithms.
- Signal processing for real-time applications.
- Computational architectures.
- Power Consumption in Semiconductors.
- Expert Systems.
Publications
- K. Nikitopoulos, G. Georgis, C. Jayawardena, D. Chatzipanagiotis and R. Tafazolli, "Massively Parallel Tree Search for High Dimensional Sphere Decoders", IEEE Transactions on Parallel and Distributed Systems (Accepted).
- C. Husmann, G. Georgis, K. Nikitopoulos and K. Jamieson, "FlexCore: Massively Parallel and Flexible Processing for Large MIMO Access Points", 14th USENIX symposium on Networked Systems Design and Implementation (NSDI), March 2017.
- G. Georgis, K. Nikitopoulos and K. Jamieson, "Geosphere: an Exact Depth-First Sphere Decoder Architecture Scalable to Very Dense Constellations.", IEEE Access vol. 5, pp. 4233-4249, March 2017.
- G. Georgis, G. Lentaris and D. Reisis, "Reduced Complexity Super-Resolution for Low-Bitrate Video Compression", Circuits and Systems for Video Technology, IEEE Transactions on , vol.26, no.2, pp.332-345, Feb. 2016.
- G. Georgis, G. Lentaris and D. Reisis, "Acceleration Techniques and Evaluation on Multicore CPU, GPU and FPGA for Image Processing & Super-Resolution", Journal of Real-Time Image Processing, pp.1-28, Jul. 2016.
- G. Menoutis, A. Foteas, N. Liakopoulos, G. Georgis, D. Reisis and G. Synnefakis, "A Configurable Transmitter Architecture & Organization for XG-PON OLT/ONU/ONT Network Elements", Electronics Circuits and Systems, 22nd IEEE International Conference on, Cairo Egypt, December 2015.
- G. Georgis, G. Menoutis, D. Reisis, K. Tsakalis and A. B. Shafique, "Towards Real-Time Neuronal Connectivity Assessment: a Scalable Pipelined Parallel Generalized Partial Directed Coherence Engine", Electronics Circuits and Systems, 22nd IEEE International Conference on, Cairo Egypt, December 2015.
- G. Georgis, D. Reisis, P. Skordilakis, K. Tsakalis, A. B. Shafique, G. Chatzikonstantis, G. Lentaris, "Neuronal Connectivity Assessment for Epileptic Seizure Prevention: Parallelizing the Generalized Partial Directed Coherence on Many-Core Platforms", Embedded Computer Systems: Architectures, Modeling and Simulation, IEEE International Conference on, Samos Greece, July 2014.
- G. Georgis, Ch. Tzeranis, G. Synnefakis and D. Reisis, "FPGA Design of the Decoding Functions in the Physical Layer Adaptation Subsystem of the XG-PON Optical Network Unit/Terminal", Ph.D. Research in Microelectronics and Electronics, 10th IEEE International Conference on, Grenoble, France, July 2014 [Silver Leaf Award].
- G. Georgis, Ch. Tzeranis, G. Synnefakis and D. Reisis, "XG-PON Optical Network Unit Downstream FEC Design Based on Truncated Reed-Solomon Code", Electronics Circuits and Systems, 21st IEEE International Conference on, Marseille France, December 2014.
- G. Georgis, G. Lentaris and D. Reisis, "Single-Image Super-Resolution using Low-Complexity Adaptive Iterative Back-projection", Digital Signal Processing, 18th IEEE International Conference on, Santorini Greece, July 2013.
- G. Georgis, G. Lentaris and D. Reisis, "Low Complexity Interpolation Filters for Motion Estimation and Application to the H.264 Encoders", Design and Architectures for Digital Signal Processing, Chapter 6, G. Ruiz and J. A. Mitchell, InTech Publishing, pp.137-154, January 2013.
- K. Manolopoulos, A. Belias, G. Georgis, D. Reisis and E.G. Anasontzis, "Signal processing for deep-sea observatories with reconfigurable hardware", Electronics Circuits and Systems, 19th IEEE International Conference on,pp. 81-84, Seville Spain, December 2012.
- G. Georgis, G. Lentaris, and D. Reisis, "Study of interpolation filters for motion estimation with application in H.264/AVC encoders", Electronics Circuits and Systems, 18th IEEE International Conference on,pp. 9-12, Beirut Lebanon, December 2011.
Projects
Refereeing/Reviewing
- IEEE Transactions on Circuits and Systems for Video Technology
- IEEE Transactions on Image Processing
- IEEE Wireless Communications Letters
- IEEE Signal Processing Letters
- IET Image Processing
- Journal of Microprocessors and Microsystems
- European Signal Processing Conference
- IEEE International Conference on Electronics, Circuits and Systems
Software
The software provided implements the Low-complexity Statistical Edge-Adaptive Back-projected Interpolation (L-SEABI) method. Also provided is a supplementary bash script which aids in executing the experiments as documented in the following manuscript:
- G. Georgis, G. Lentaris and D. Reisis, "Reduced Complexity Super-Resolution for Low-Bitrate Video Compression", Circuits and Systems for Video Technology, IEEE Transactions on , vol.26, no.2, pp.332-345, Feb. 2016.
The software is provided in compiled executable format, for execution under 32- and 64-bit Linux OSs using generic GCC flags with O2 optimization. It is thus not intended to serve as a basis for computation time comparisons.
Please cite the paper above if you find this software useful, or use the provided code in a research project.