Name

Georgios Papaioannou

Contact Information

Contact address:
Department of Informatics, Athens University of Economics and Business, 76 Patission Str., 10434, Athens, Greece

Office:
28 Ydras Str., 4th floor, Kypseli, Athens, Greece

Telephone Number (office):
+30-210-8203934

e-mail Address:
gepap[at - remove this]aueb.gr

Personal web page:
http://www.aueb.gr/users/gepap

Graphics Group web site:
http://www.aueb.gr/users/gepap

Personal Data

Occupation:

Assistant professor at the Department of Informatics of the Athens University of Economics and Business

Date of Birth:
7 September 1974

Marital Status:
Single

Military Service:
Greek Army (Jul 2001- Nov 2002)

Studies

1992-1996:
4-year B.Sc. from the Department of Informatics of the University of Athens (Signal Processing and Telecommunications specialization). Graduate thesis on depth-from-stereo computer vision algorithms.

1997-2001:
Ph.D. in  3D Computer Graphics and Pattern Recognition from the Department of Informatics and Telecommunications of the University of Athens (supervisor: T. Theoharis). Ph.D. thesis title: “Automatic Object Reconstruction using Three-dimensional Algorithms and Applications in  Archaeological Reconstructions” (a brief overview can be found at: http://graphics.cs.aueb.gr/graphics/research_reconstruction.html)

Research Interests
  • Real-time 3D graphics
  • Photorealistic rendering algorithms
  • Virtual reality
  • Three-dimensional pattern recognition

Scientific Communities and Boards

 
  • Member of ACM, SIGGRAPH and Eurographics association.
  • Member of program committee of various international conferences.

Publications

 

Journal and Conference Papers (Chronological order)

S. Katsigiannis, G. Papaioannou, D. Maroulis, A Contourlet Transform based algorithm for real-time video encoding , SPIE Photonics Europe, Real-Time Image and Video processing Conference, 16-19 April, Brussels, Belgium, 2012.

Mavridis, P., Papaioannou, G. Texture compression using wavelet decomposition: A preview. Poster, Proc. I3D 2012: ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, p. 218.

A. Gaitatzes, P. Mavridis, G. Papaioannou, Two Simple Single-pass GPU methods for Multi-channel Surface Voxelization of Dynamic Scenes, (short paper) proc. Pacific Graphics 2011.

G. Papaioannou, Real-Time Diffuse Global Illumination Using Radiance Hints, Proc.ACM SIGGRAPH Symposium on High Performance Graphics (HPG '11), pp. 15-24.

P. Mavridis, G. Papaioannou, Global Illumination Using Imperfect Volumes. Proc. GRAPP 2011.

P. Mavridis, G. Papaioannou, High Quality Elliptical Texture Filtering on GPU, Proc. 2011 ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (I3D 2011), San Francisco, CA, USA, pp. 23-30, 2011.

P. Mavridis, A. Gaitatzes, G. Papaioannou, Volume-based diffuse glocal illumination. Proc. CGVCVIP ’10: Proceedings of Computer Graphics, Visualization, Computer Vision and Image Processing 2010.

A. Gaitatzes, P. Mavridis, G Papaioannou, Interactive Volume-based Indirect Illumination of Dynamic Scenes, Proc. 3IA ’10: Proceedings of the 2010 International Conference on Computer Graphics and Artificial Intelligence, May 2010.

G. Papaioannou, M. L. Menexi, C. Papadopoulos, Real-Time Volume-Based Ambient Occlusion, IEEE Transactions on Visualization and Computer Graphics, pp. 752-762, September/October, 2010.

P. Papiotis, G. Papaioannou, Kettle: A Real-time model for Orchestral Timpani, Proc. Sound and Music Computing 2010, Barcelona, Spain.

A. Gaitatzes, A. Andreadis, G. Papaioannou, Y. Chrysanthou, Fast Approximate Visibility on the GPU Using Precomputed 4D Visibility Fields, Proc. WSCG 2010, pp. 131-138, 2010.

C. Papadopoulos, G. Papaioannou, Realistic Real-time Underwater Caustics and Godrays, Proc. GraphiCon '09, pp. 89-95, 2009.

C. Koniaris, A. Gaitatzes, G. Papaioannou, An Automated Modeling Method for Multiple Detail Levels Of Real-time Trees, Proc. IEEE Int. conf. Games and Virtual Worlds for Serious Applications, pp.53-60, 2009.

A. Gaitatzes, Y. Chrysanthou, G. Papaioannou: Presampled Visibility for Ambient Occlusion, Proc. WSCG 2008, Journal of WSCG, 16(1-3), pp. 17-24, 2008.

D. Christopoulos, A. Gaitatzes, G. Papaioannou, G. Zyba, Designing a Real-time Playback System for a Dome Theater, Proc. Eurographics 7th International Symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage VAST, pp. 35-40, 2006.

A. Gaitatzes, G. Papaioannou, D. Christopoulos, G. Zyba, Media Productions for a Dome Display System, Proc. ACM Symposium on Virtual Reality Software and Technology (VRST) 2006, pp. 261-264, 2006.

G. Papaioannou, A. Gaitatzes, D. Christopoulos, Efficient Occlusion Culling using Solid Occluders. Proceedings of the 14-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG '2006), pp. 85-93, 2006.

P. Stavrou, P. Mavridis, G. Papaioannou, G. Passalis, T. Theoharis, 3D Object Repair Using 2D Algorithms, Proc. International Conference on Computational Science 2006 (ICCS 2006), LNCS, Springer.

A. Gaitatzes, D. Christopoulos, G. Papaioannou, Virtual Reality Systems and Applications: The Ancient Olympic Games. Proc. 10th Panhellenic Conference on Informatics (PCI'05), Springer LNCS 3746, pp. 155-165.

A. Gaitatzes, D. Christopoulos, G. Papaioannou, The Ancient Olympic Games: Being Part of the Experience, Proc. Eurographics 5th International Symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage (VAST), pp. 19-28, 2004.

N. Vajramushti, I. A. Kakadiaris, T. Theoharis, G. Papaioannou, Efficient 3D Object Retrieval Using Depth Images, 6th ACM SIGMM International Workshop on Multimedia Information Retrieval (ACM SIGMM MIR '04), New York, USA, pp. 189-196, 2004.

G. Papaioannou, E. A. Karabassi, On the Automatic Assemblage of Arbitrary Broken Solid Artefacts, Image & Vision Computing, Elsevier, 21(5), pp. 401-412, 2003. 

E. A. Karabassi, G. Papaioannou, C. Fretzagias and T. Theoharis, Exploiting Multiresolution Models to Accelerate Ray Tracing, Computers & Graphics, Elsevier, 27(1), pp. 91-98, 2003. 

G. Papaioannou, A. Gaitatzes, D. Christopoulos, Enhancing Virtual Walkthroughs of Archaeological Sites, Proc. Eurographics 4th International Symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage (VAST), pp. 175-184, 2003.

G. Papaioannou, T. Theoharis, Fast Fragment Assemblage Using Boundary Line and Surface Matching, IEEE ICPR/ACVA 2003 proceedings.

D. Christopoulos, A. Gaitatzes, G. Papaioannou, Image-based Techniques for Enhancing Virtual Reality Environments, Proc. of 2nd International Workshop on ICT's, Arts and Cultural Heritage, Athens, Greece, 2003.

G. Papaioannou, E.A. Karabassi, T. Theoharis, Reconstruction of Three-dimensional Objects through Matching of their Parts, IEEE Transactions on Pattern Analysis and Machine Intelligence, 24(1), pp.114-124, 2002.

G. Papaioannou, E.A. Karabassi, T. Theoharis, Virtual Archaeologist: Assembling the Past, IEEE Computer Graphics and Applications, 21(2), pp. 53-59, 2001. 

T. Theoharis, G. Papaioannou, E. A. Karabassi, The Magic of the Z-Buffer: A Survey, Proceedings of the 9-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG '2001), pp. 379-386, 2001.

G. Papaioannou, E.A. Karabassi, T. Theoharis, Segmentation and Surface Characterization of Arbitrary 3D Meshes for Object Reconstruction and Recognition, Proceedings of the International Conference on Pattern Recognition ‘2000, IEEE, 2000, pp. 734-737.

G. Papaioannou, E.A. Karabassi, T. Theoharis, Automatic Reconstruction of Archaeological Finds - A Graphics Approach, Proc. of the 4th International Conference on Computer Graphics and Artificial Intelligence (3IA' 2000), Limoges, France, pp117-125, 2000.

E.A. Karabassi, G. Papaioannou, T. Theoharis, A Fast Depth Buffer Based Voxelization Algorithm, Journal of Graphics Tools, ACM, 4(4), pp.5-10, 1999.

M. Hatzitheodorou, A. Karabassi, G. Papaioannou, A. Boehm, T. Theoharis, Stereo Matching Using Optic Flow, Real Time Imaging, Academic Press, 6(4), pp. 251-266, 2000.

E. A. Karabassi, G. Papaioannou, Th. Theoharis, Intersection Test for Collision Detection in Particle Systems, Journal of Graphics Tools, ACM, 4(1), pp 25-37, 1999.

G. Papaioannou, T. Theoharis, A. Boehm, A Texture Controller, The Visual Computer, Springer-Verlag, 14(10), pp 488-496, 1998.

Chapters

P. Mavridis, G. Papaioannou, Practical Elliptical Texture Filtering, GPU Pro 3: Advanced Rendering Techniques, Wolfgang Engel (ed.), AK Peters/CRC Press, 2012.

A. Gaitatzes, P. Mavridis, G. Papaioannou, Interactive Volume-based Indirect Illumination of Dynamic Scenes, Intelligent Computer Graphics 2010, Studies in Computational Intelligence series, Springer.

Books

Graphics and Visualization: Principles & Algorithms, T. Theoharis, G. Papaioannou, N. Platis, N. M. Patrikalakis, AK Peters, USA. International edition: 2008. Greek edition: 2010 (Symmetria publishers).

Graphics: Principles and Algorithms, T. Theoharis and A. Boem, Symmetria, 1999 (Greek computer graphics textbook - chapters).

Lecture Notes

Human – Computer Interaction: The Design of Interactive Systems, G. Papaioannou, Athens University of Economics and Business, 2004.

PhD Theses

G. Papaioannou, Automatic Reconstruction of Objects from their Parts and its Application to Digital Archaeology, Ph.D. Dissertation (in Greek), 2001

 

Research and Development Projects

Real-time Global Illumination Algorithms (Basic Research Fund Project ΕΡ-1805-33/ 00-1), AUEB Research Grant, 3/3/2011 – 2/3/2012.
Role: Principal investigator.

Realistic Environment Illumination for Real-time Graphics (Basic Research Fund Project ΕΡ-1600-10/00-1), AUEB Research Grant, 1/3/2009 – 28/2/2010.
Role: Principal investigator.

Digitisation and Digital Documentation of the Hellenic Ministry of Culture Monuments Collections (3rd CFS – Information Society – Measure 1.3) - Digitisation of the Hellenic Ministry of Culture Moveable Monuments Collections. Primary contractor: PRC Group – Forth, Sub-contractor: Athens University of Economics and Business, 2008.
Role: Training coordinator, digitization procedure specification.

The Battle of Chaeronia – Virtual Reality Installation, Independent production, 2007.
Role: VR engine developer and sound engineering.

THOLOS – Design and Construction of a 132-seat Virtual Reality Dome Theatre, Foundation of the Hellenic World, 2002-2006.
Role: Design and implementation of the VR computer cluster architecture, the dynamic multi-projection display subsystem and the THX sound generation system.

Morpheus: Passive Stereo VR System, Foundation of the Hellenic World, 2005.
Role: Passive stereo software adaptation, audio server re-programming, system configuration.

Virtual Reconstruction of Ancient Agora of Athens - Information Society, 3rd Framework, EU, VR production (FHW), 2005-2006.
Role: Scientific advisor, VR engine developer.

IEEE CSIDC competition '05 - Bus Positioning and Utilization System (Athens University of Economics and Business), 2005.
Role:Team mentor.

The Olympic Games (A Walk through Ancient Olympia) – Foundation of the Hellenic World, 2003-2004.
Role: Research and Development of the VR engine (Enhanced Visualisation Simulator) and auxiliary applications, 3D modeling, texturing and audio processing.

ArtNouveau – European Thematic Network of Excellence (IST-2001-37863), Foundation of the Hellenic World, 2002-2003
Role: Technology Research
 
e-CultureNet - European Thematic Network of Excellence (IST-2001-37491), Foundation of the Hellenic World, 2002-2003
Role: Technology Research / Pilot Project design
 
EUCLID RTP 6.14: MARVEL - Virtual Environment for Military Decision Making, Department of Informatics and Telecommunications, University of Athens/Intracom Military Division, 2002-2003
Role: Research and development (lead programmer).

mPiro – IST program: Multilingual, personalized text and speech generation platform, Foundation of the Hellenic World, 2002.
Role: System programming

C4i (Command, Control, Communications & Computing IS) Military GIS Client Application, Greek Army (Greek Army/Research & Computing Division), 2002.
Role: Lead programmer.

Virtual Archaeological Reconstruction Environment – Department of Informatics and Telecommunications, University of Athens, Research Fund (70/4/3241), 1999-2000.
Role: Research and Development.

PATRA (EPET 2) - 3D Vascular Angiography Volume Visualization, Department of Informatics and Telecommunications, University of Athens, 1998-2000.
Role: Research and Development.

PARROT - Parallel Roostering (ESPRIT 24960), Department of Informatics and Telecommunications, University of Athens, 1998-1999
Role: Developer.

3DHEARTVIEW – 3D Vascular Angiography Volume Reconstruction (ESPRIT 24484), Department of Informatics and Telecommunications, University of Athens, 1998.
Role: Research (computer vision)

VR Productions and Shows

Virtual Reconstruction of Ancient Agora of Athens (FHW) - Software engineering, scripting, image-based modelling, image-based rendering, texturing, modelling, sound engineering.

A Walk through Ancient Olympia (FHW) - Software engineering, scripting, image-based rendering, texturing, modelling, sound engineering.

Snowman! Christmas Thematic Show (FHW) - scripting, texturing, modelling, sound engineering. Private project.

CAVE Menu System (FHW) - texturing, modelling, sound engineering.
 
The Battle of Chaeronia – Virtual Reality Installation, independent production, software engineering, sound engineering and music composition.

Teaching/Working Experience


 

May 2010 – Today:
Assistant professor at the Department of Informatics, Athens University of Economics and Business. Position title: Computer Graphics and Graphical User Interfaces. Assigned courses: Elementary and Advanced Computer Graphics (MSc), Human - Computer Interaction.

March 2006 – May 2010:
Lecturer at the Department of Informatics, Athens University of Economics and Business. Position title: Human-Computer Interaction. Assigned courses: Elementary and Advanced Computer Graphics, Human - Computer Interaction, Programming (Java).

September 2002 – May 2007:
Virtual Reality Engineer at  the Foundation of the Hellenic World. Responsibilities: Design and implementation of multiplatform VR systems from the hardware and software to the final installation and VR production generation. Design and implementation of multiple-projector VR computer cluster and THX sound generation system.

October 2004 – March 2006:
Lecturer (short-term position) at the Department of Informatics, Athens University of Economics and Business. Position title: Computer Graphics and Human – Computer Interaction.

2002-2004:
Instructor at the undergraduate course program of the Dept. of Informatics and Telecommunications of the University of Athens, teaching the two undergraduate graphics courses of the program and the Master’s course in computer graphics and visualization. Instructor at the Dept. of Mathematics of the University of Athens (Data Structures).

2002
Greek Army, Informatics and Research Corp: Lead programmer of the C4I distributed intelligence system (during the military service). Joined the Intracom Military division as a lead programmer on their Three-dimensional real-time C4I project (EUCLID Marvel).

1997-2001
Participation as a researcher and developer in many research projects of the Dept. of Informatics and Telecommunications of the University of Athens, with focus on 3D graphics, 2D/3D(volume) image processing and pattern recognition.
Lectures on special topics on computer graphics at the same department.

1999-2000
Design, organization and implementation of the first university-level laboratory course on graphics programming (C/C++ and OpenGL) under the supervision of T. Theoharis.

1997-1998
Unix and network system administrator at the Dept. of Informatics and Telecommunications of the University of Athens.

 

Spoken languages

Greek, English

Personal Interests

Music composition, guitar playing, 3D modeling, painting, woodworking, trecking and other sports

 

Last modified: 16 May 2012