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AIT Community / Faculty / Resident / Aristodemos Pnevmatikakis

apne
CONTACT INFORMATION
Dr. Aristodemos Pnevmatikakis
Associate Professor
Athens Information Technology
PO Box 68, 19.5 km, Markopoulo Avenue
Peania 19002, Athens, Greece
Tel: (+) 30-210-668-2756
Mob: (+) 30-6974-857176
Fax: (+) 30-210-668-2703
Email: apne@ait.edu.gr 		PERSONAL DATA
Place and date of birth: Athens, 26/09/1971
Citizenship: Hellenic
Languages: Greek, English
Summary  Research Studies  Teaching  Professional Publications
Topics  Events  Team  Projects Theses Books  Patents  Journals  Conferences

Summary

Dr. Aristodemos Pnevmatikakis is an associate professor at Athens Information Technology. His prime research interest is tracking and identification systems for human-machine and human-to-human interaction modeling in intelligent spaces. He focuses on detection and tracking, multimedia processing, pattern recognition, data conversion, signal processing for the physical layer and RF system level design. He is co-author of the books Audio-Visual Person Tracking: A Practical Approach (Imperial College Press, London, UK, Summer 2011) and Delta-Sigma Modulators, Modeling, Design and Applications (Imperial College Press, London, UK, 2003). His research has resulted to a series of scientific publications and has been featured on regional and international media and events, while the resulting systems have been successfully evaluated at international evaluation campaigns. He has been involved in numerous EU and national research and industrial projects.

He received his BSc in Physics from University of Patras, Greece in 1993 and his MSc and PhD from Imperial College, University of London in 1995 and 1999 respectively. Since July 2003, he is with Athens Information Technology. He has been with the Development Programs Dept. of Intracom (2001-2003) and with the Analogue and RF Design Group of Integrated Systems Development (1999-2001).

Research

Topics

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Events

The outcomes of the research have been featured on Greek national TV (eLife – ET3, Apr. 2005), radio (Flash FM, Fall 2008) and newspapers (Summer 2006).

The resulting tracking and recognition systems have been demonstrated at COMDEX exhibition (Athens, Nov. 2005), CHIL Technology Days (Berlin, Apr. 2006 & Karlsruhe, July 2007), IST Conference (Helsinki, Nov. 2006) and for three consequtive years in Athens Digital Week, a popular technology show(Athens, 2008, 2009 and 2010).

Finally, resulting tracking and recognition systems have been evaluated at international evaluation campaigns (CLEAR 2006 & 2007, RT’06, TrecVid 2008) and have been included in prototype systems resulting from numerous research projects.

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Team

The research is being carried out in collaboration with the following people:

  • Andreas Stergiou (Jan. 2005 to date): Speaker identification, speaker diarization, face detection, 2D person tracking, automatic form processing. 13 publications.
  • Nikos Katsarakis (Feb. 2007 to date): 3D person tracking, automatic form processing, 9 publications.
  • Thodoris Petsatodis (Jan. 2008 to date): Audiovisual voice activity detection, smart surfaces, 3 publications.
    •

Previous members of the team include:

  • Vassileios Mylonakis (Oct. 2005 to Feb. 2012): Implementation of tracking algorithms. 4 publications.
  • George Souretis (Oct. 2005 to Sept. 2006): Face recognition, 3D scene reconstruction and active contours. 2 publications.
  • Elias Rentzeperis (Oct. 2005 to Dec 2006): Face recognition and speech activity detection. 3 publications.
  • Ghassan Karame (Jan. 2007 to March 2007): Face detection and tracking, 2 publications.
  • Panagiotis Papageorgiou (Feb. 2007 to Sept. 2008): 2D face tracking, 2 publications.
  • Charis Doukas (Jan. 2008 to Jan 2009): Automatic form processing, 3 publications.
  • Ahmad Sabouri (Dec. 2009 to Dec 2010): Knowledge base design for smart environments.
    •

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Projects

From To Project Role
11/2011 cont. SMART (Search engine for MultimediA enviRonment generated contenT, FP7-ICT 287583) Synthesis of searchable events by fusion of sensor and social networs' data
1/2010 cont. THIS (Transport Hub Intelligent video System, JLS/2009/CFP/CIPS “Prevention, Preparedness, and Consequence Management of Terrorism and other Security Related Risks”) Analysis and fusion of field video data to identify suspect individuals
1/2009 cont. AGNES (User-sensitive Home-based Systems for Successful Ageing in a Networked Society, ALL-2008-1-014) Automated systems to fight social isolation of the elderly for extended independent living. Gesture recognition
8/2008 1/2012 MEDUSA (Multi Sensor Data Fusion Grid for Urban Situational Awareness, European Defense Agency, A-0444-RT-GC JIP-FP Call 3 - Sensor Fusion) Person and vehicle tracking and diarisation in outdoor scenarios. Fusion of multi-sensor data
2/2008 7/2011 My e-Director 2012 (Real-Time Context-Aware and Personalized Media Streaming Environments for Large Scale Broadcasting Applications, FP7-ICT 215248) Provide a unique interactive broadcasting service enabling end-users to select focal actors and points of interest within real-time broadcasted scenes. Work-package 4 leader
1/2008 7/2011 HERMES (Cognitive Care and Guidance for Active Aging, FP7-ICT 216709) Provide an integrated approach to cognitive care, by an assistive technology that combines the functional skills of the older person to reduce age-related decline of cognitive capabilities and assist the user where necessary. Work-package 4 leader
6/2006 12/2007 ΠΡΙΑΜΟΣ (GSRT, 3rd Framework, section 3.3) Computer vision and statistical signal processing for human-machine interfaces
5/2004 5/2006 PROSTO (GSRT) Teaching appropriately selected target groups on technology topics relating to managing transport traffic and vehicles
1/2004 8/2007 CHIL (Computers in the Human Interaction Loop, IST-2002-506909) Fade the computers into the background assisting human-to-human interaction. Audio-visual detection tracking and recodnition algorithms
9/2001 4/2005 PERLA (HBT Integrated SiGe Transceiver for Hiperlan, IST-2000-30132) Development of the RF section of a transceiver for HIPERLAN/2 or 802.11a systems. Work-package 4 leader. Transceiver architecture and specification of its components
5/1998 9/1999 PROMURA (PROgrammable Multimode Radio for Multimedia Wireless Terminals, ESPRIT-4 26961) Software radio building blocks in SiGe
3/1996 1/1998 ΠΕΝΕΔ’95 no. 1318 (GSRT) Usage of switched-capacitor circuits in the design of integrated oversampled analogue-to-digital converters
12/1993 11/1995 ΠΕΝΕΔ’91 no. 757 (GSRT) Design of linear and non-linear filters for Delta modulated signals

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Studies

  • 1/96 – 5/99    Research leading to a Ph.D., supervised by Prof. A. G. Constantinides, in Signal Processing Section, Electrical and Electronic Engineering Dept., Imperial College of Science, Technology and Medicine, University of London. Ph.D. Thesis entitled ‘Modeling, Analysis and Design of Higher-Order Single-Stage Sigma-Delta Modulators’.
  • 10/94 - 10/95    Attending the M.Sc. course entitled ‘Communications and Signal Processing’ in the Electrical and Electronic Engineering Dept., Imperial College of Science, Technology and Medicine, University of London. M.Sc. Thesis entitled ‘Sigma-Delta Modulation: Coders, arithmetic operation circuits and filters’, supervised by Prof. A. G. Constantinides.
  • 12/93 - 10/94    Postgraduate studies in the Dept. of Physics, University of Patras. Research carried out on Delta Modulation IIR filters.
  • 9/93 - 12/93    ‘Using Analogue and Digital Filters in Signal Processing’, seminar organized by the Electronics Laboratory, University of Patras.
  • 6/93 - 7/93    ‘Physics and Technology’, summer School organized by the National Research Center ‘Democritos’.
  • 9/89 - 7/93    Physics Dept., University of Patras (four-year course). Diploma thesis entitled ‘Digital Design using Programmable Logic Devices’, supervised by Prof. T. Deliyannis. Graduation with grade 8.39/10.
  • 9/86 - 6/89    Third General Lyceum of Athens, graduation with grade 19.1/20.

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Teaching activities

  • 9/2004 - to date    Instructor or co-instructor of the following courses offered at AIT (Detailed information on these courses available here):
Year   Semester  Course Program
2012 Spring Numerical Methods in MATLAB BScEng
2012 Spring Ambient Inteligence Laboratory MSITT
2011 Fall Mathematics 1A BScEng
2011 Fall Programming and Data Structures MSITT
2011 Spring Ambient Inteligence Laboratory MSITT
2010 Fall Programming and Data Structures MSITT
2010 Summer Multimedia Communications MSIN
2010 Spring Ambient Inteligence Laboratory MSITT
2009 Spring Ambient Inteligence Laboratory MSITT
2008 Summer Multimedia Communications MSIN
2008 Spring Ambient Inteligence Laboratory MSITT
2007 Fall Digital Communications MSIN
2007 Summer Multimedia Communications MSIN
2007 Spring Ambient Inteligence Laboratory MSITT
2007 Spring Digital Signal Processing MSITT
2006 Fall Digital Communications MSIN
2006 Summer Communications and Digital Systems' Design   MSIN
2005 Fall Communications and Digital Systems' Design   MSIN
2005 Fall Telecomunications Systems MSITT
2005 Summer Multimedia Communications MSIN
2005 Spring Advanced Digital Signal Processing MSIN
2005 Spring Digital Signal Processing MSITT
2004 Fall Telecomunications Systems MSITT
  • 2/2003 - 8/2004    Teaching assistant at AIT.
  • 11/1996 - 2/1997    Instructor, Digital Signal Processing course, M.Sc. in Medical Physics, Dept. of Medicine, University of Patras.
  • 9/1993 - 3/1998    Laboratory assistant, Basic Electronics and Analog Electronics courses, Dept. of Physics, University of Patras.

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Theses Supervised

PhD theses

  1. J. Kokkoris, 'Context-Driven Blind Source Separation', joint CTiF (Aalborg University) and AIT PhD program, co-supervised with F. Talantzis, Z.-H. Tan and R. Prassad, Fall 2010 - to date.
  2. N. Katsarakis, 'Automatic Scene Analysis on Live Video Feeds', joint CTiF (Aalborg University) and AIT PhD program, co-supervised with Z.-H. Tan, S. Kyriazakos and R. Prassad, Spring 2008 - to date.

MSc theses

  1. P. Mazarakis, ‘Comparison of Face Detection Algorithms’, MSITT thesis, Summer-Fall 2011.
  2. M. Andersen and R. Andersen, ‘Multi-Camera Person Tracking using Particle Filters’, MSc thesis, Aalborg University, 2010, co-supervised with Zheng-Hua Tan, work resulted to 1 publication.
  3. G. Migkos, ‘Tracking Motion Evidence in 3D’, MSITT thesis, Summer-Fall 2009.
  4. N. Saleh, ‘Emotion Recognition in Faces’, MSITT thesis, Summer-Fall 2009.
  5. D. Bardakas, ‘Face detection and validation’, MSITT thesis, Summer-Fall 2008.
  6. A. Anagnostopoulos, ‘Computer Vision Based Human Machine Interfaces’, MSIN thesis, Summer-Fall 2007, work resulted to 1 publication.
  7. M. Mpasoukos, ‘Multimodal enhancements for speech recognition in in-car environments’, MSIN thesis, Summer-Fall 2007.
  8. R. Hallush, ‘Near- and Far-Field Video-to-Video Face Recognition’, MSIN thesis, Summer-Fall 2007.
  9. T. Petsatodis, ‘Robust Voice Activity Detection Using Audio and Video Information’, MSITT thesis, Fall 2007.
  10. S. Petris, ‘Face Recognition for Processor-Limited Portable Devices’, MSITT thesis, Summer-Fall 2007.
  11. E. Rentzeperis, ‘A Comparative Analysis of Face Recognition Algorithms: Hidden Markov Models, Correlation Filters and Laplacianfaces vs. Linear subspace projection and Elastic Bunch Graph Matching’, MSIN thesis, Spring 2005, work resulted to 1 publication.
  12. G. Souretis, ‘Face Recognition using Kernel Methods’, MSIN, Fall 2005.
  13. I. Vazeos, ‘Active Appearance Models’, MSIN thesis, Fall 2005.
  14. N. Katsarakis, ‘Adaptive background segmentation and shadow detection for video streams’, MSIN thesis, Fall 2005.
  15. I. Zafar, ‘Person tracking using the CONDENSATION algorithm’, MSIN thesis, Fall 2005.
  16. G. Genaro, ‘Fusing Information for Audio-Visual Person Localization and Tracking’, MsITT thesis, Summer 2005.
  17. J. Kokkoris, ‘Designing an Inertial Navigation System’, MsITT thesis, Fall 2005.
  18. A. Stergiou, ‘Face Recognition by Elastic Bunch Graph Matching’, MSIN thesis, Summer-Fall 2004, work resulted to 1 publication.
  19. P. Kasianidis, ‘Tracking a Speaker using a Microphone Array and a PTZ Camera’, MSIN thesis, Fall 2004.
  20. P. Skouloudakis, ‘Synchronization for IEEE802.11a’, MSIN thesis, Fall 2004.
  21. I. Papagrigorakis, ‘Face tracking using active contour deformable templates’, MSIN thesis, Fall 2004.

MSc term projects

  1. A. Breton, A. Cabec, O. Esposito, G. Laurinaviciute, A. Majetniak and F. Rose, ‘Local Positioning System Based on Face Detection’, MSc term project, Aalborg University, 2011, co-supervised with Zheng-Hua Tan.
  2. N. Saleh, ‘Recognition of Emotional Faces’, MSITT independent study, Summer-Fall 2009.
  3. T. Petsatodis, ‘Hidden Markov Models with Applications to Audio Processing’, MSITT independent study, Summer 2007.
  4. G. Karame, ‘Face Tracking using Boosting and Color’, MSIN independent study, Fall 2006.
  5. N. Thomos, ‘Background Segmentation for Moving Cameras’, MSIN independent study, Fall 2006.
  6. V. Mylonakis, ‘Global Capturing Application Programming Interface’, MSIN independent study, Fall 2005.
  7. G. Souretis, ‘Learning chaotic dynamics with neural networks’, MSIN independent study, Fall 2005.
  8. I. Vazeos, ‘Video segmentation using the pixel persistence map’, MSIN independent study, Fall 2005.
  9. N. Katsarakis, ‘Fusing Audio and Video for Person Tracking’, MSIN independent study, co-supervisor with F. Talantzis, Fall 2005, work resulted to 1 publication.
  10. J. Kokkoris, ‘Camera calibration for 3D localization’, MsITT independent study, Summer 2005.
  11. L. Adzigogov, ‘Face Detection using Skin Color Models’, MSIN independent study, Summer 2004.
  12. P. Kasianidis, ‘Face Detection using Subspace Projection’, MSIN independent study, Summer-Fall 2004.
  13. A. Stergiou, ‘Speaker Identification’, MSIN independent study, Fall 2004.
  14. Z. Bakirtzoglou, ‘Subspace Projection Face Recognition’, MSIN independent study, Fall 2004.

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Professional activities

  • 7/2003 - to date    Associate professor (since Nov. 2006), assistant professor (July 2004 to Oct. 2006) and researcher (July 2003 to June 2004) at Athens Information Technology, member of the Autonomic and Grid Computing Group.
  • 4/2001 - 6/2003    Intracom S.A., Development Programs Department. Development of algorithms and systems, both RF and digital, for WLANs using OFDM.
  • 4/1998 - 3/2001    Integrated Systems Development S.A., Analogue & RF Systems Integration Group. Work on circuits and systems for multi-mode wireless transceivers.
  • 5-1998 - 11/1998    Subcontracted to ST Microelectronics in St. Genis (France) and Geneva (Switzerland). Work with Wireless Terminals Strategic Unit.
  • 1/1996 - 12/2003    Collaboration with N. Katsarakis E.E. for the translation and revising of technical specifications and standardization documents in the filed of communications.

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Publications

Copyright notice: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. Download publications list in BibTEX form.

Books

Authored

  1. G. Bourdopoulos, A. Pnevmatikakis, V. Anastassopoulos and T. Deliyannis, ‘Delta-Sigma Modulators, Modeling, Design and Applications,’ World Scientific Publication Company, Imperial College Press, Sept. 2003. (828 copies sold, 41 citations)
  2. F. Talantzis, A. Pnevmatikakis and A.G. Constantinides, ‘Audio-Visual Person Tracking: A Practical Approach,’ World Scientific Publication Company, Imperial College Press, Dec. 2011.

Edited

  1. C. Boukis, A. Pnevmatikakis and L. Polymenakos (eds.), ‘Artificial Intelligence and Innovations 2007: From Theory to Applications’, Springer, Berlin Heidelberg, ISBN 978-0-387-74160-4, Sept. 2007.
  2. S. Tsekeridou, A. Pnevmatikakis, K. Wong, T. Tiropanis and R. Nakatsu (eds.), ‘3rd International Conference on Digital Interactive Media in Entertainment and Arts’, ISBN: 978-1-60558-248-1, Sept. 2008.

Book chapters

  1. A. Pnevmatikakis and L. Polymenakos, ‘Far-Field Multi-Camera Video-to-Video Face Recognition’, in K. Delac and M. Grgic (eds.), Face Recognition, I-Tech Education and Publishing, ISBN 978-3-902613-03-5 (4 citations).
  2. A. Pnevmatikakis, ‘Where and Who? Person Tracking and Recognition System’, in I. Maglogiannis, K. Karpouzis, M. Wallace and J. Soldatos (eds.), Emerging Artificial Intelligence Applications in Computer Engineering, IOS Press, ISBN 978-1-58603-780-2, Oct. 2007.
  3. A. Pnevmatikakis, H. K. Ekenel, C. Barras and J. Hernando, ‘Multimodal Person Identification’, in A. Waibel and R. Stiefelhagen (Eds.), ‘Computers in the Human Interaction Loop’, Springer, ISBN: 978-1-84882-053-1, 2009.
  4. K. Bernardin, R. Stiefelhagen, A. Pnevmatikakis, O. Lanz, A. Brutti, J. R. Casas and G. Potamianos, ‘Person Tracking’, in A. Waibel and R. Stiefelhagen (Eds.), ‘Computers in the Human Interaction Loop’, Springer, ISBN: 978-1-84882-053-1, 2009 (1 citation).

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Patents

  1. A. Pnevmatikakis and A. Diamandis, “Διαμόρφωση εντύπου πολλαπλών επιλογών αναγνώσιμου με ηλεκτρονικό μέσο και σύστημα και μέθοδος για την ερμηνεία κατ' ελάχιστον μίας επιλογής του χρήστη”, Greek patent, no. 20080100525, Aug. 2008.
  2. A. Pnevmatikakis and A. Diamandis, “Machine-Readable form configuration and system and method for interpreting at least one user mark”, U.S. patent application, no. 12/510,825, July 2009.
  3. A. Pnevmatikakis and A. Diamandis, “Machine-Readable form configuration and system and method for interpreting at least one user mark”, Patent Cooperation Treaty, no. PCT/US09/52032, July 2009.
  4. A. Pnevmatikakis and A. Diamandis, “System and method for interpreting at least one user mark on a machine-readable form configuration”, European patent application, no. 09 167 121.4, Aug. 2009, accepted.

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Journals

Download publications list in BibTEX form

Sigma-Delta

  1. A. Pneumatikakis, V. Anastassopoulos and T. Deliyannis, ‘Realization of a High Order IIR Delta Sigma Filter’, Int. J. Electronics, vol. 78, no. 6, pp.1071-1089, June 1995.
  2. A. Pneumatikakis, A. Constantinides, V. Anastassopoulos and T. Deliyannis, ‘Sigma-Delta IIR Filter Realization Using Third-Order Remodulators’, J. Circuits, Systems and Computers, vol 8, no 4 (1998), pp. 461-472.
  3. A. Pneumatikakis, A. Constantinides, G. Bourdopoulos and T. Deliyannis, ‘Stabilization of Third-Order Single-Stage Sigma-Delta Modulators’, Circuits, Systems and Signal Processing, vol. 18, no. 2, pp.149-168, 1999. (1 citation)
  4. G. Bourdopoulos, A. Pnevmatikakis and T. Deliyannis, ‘Numerical Method for Determining the Quantization Error PDF of Single-Bit Sigma-Delta Modulators’, IEEE Trans. Circuits and Systems – I: Regular Papers, vol. 51, no. 4, pp. 718-731, April 2004. (1 citation)

RF System-level Design

  1. A. Pneumatikakis, L. Dermentzoglou, A. Arapoyanni and I. Moisiadis, ‘Image Rejection Receiver Architectures for Multi-Standard TDMA Applications’, RFdesin Magazine, May 2000, pp. 28-37.
  2. A. Pneumatikakis, L. Dermentzoglou and A. Arapoyanni, ‘Analog-to-Digital Interface in Heterodyne Receivers’, J. Circuits, Systems and Computers, pp. 57-72, Jan 2002.

OFDM Modem

  1. S. Blionas, K. Masselos, C. Dre, F. Ieromnimon, T. Pagonis, A. Pnevmatikakis, A. Tatsaki, T.Trimis, A. Vontzalidis and D. Metafas, ‘Prototyping of a 5GHz WLAN Reconfigurable System-on-Chip’, IECE Trans. Electron., Vol.E86-D, No.5, pp. 901-909, May 2003. (4 citations)
  2. A. Pnevmatikakis, S. Blionas and D. Triantis, ‘Physical Layer of Base-Band OFDM Modem: Algorithms and Performance’, J. Circuits, Systems and Computers, vol. 14, no.3, June 2005. (1 citation)

Context from Video

  1. D. Mostefa, N. Moreau, K. Choukri, G. Potamianos, S. Chu, A. Tyagi, J. Casas, L. Christoforetti, F. Tobia, A. Pnevmatikakis, V. Mylonakis, F. Talantzis, S. Burger, R. Stiefelhagen, K. Bernardin and C. Rochet, ‘The CHIL Audiovisual Corpus for Lecture and Meeting Analysis inside Smart Rooms’, Journal on Language Resources and Evaluation, Vol. 41, No. 3-4, pp. 389-407, Springer, Dec. 2007 (28 citations).
  2. F. Talantzis, A. Pnevmatikakis, and A. G. Constantinides, ‘Audio-Visual Active Speaker Tracking In Cluttered Indoors Environments’, Journal of Systems, Man, and Cybernetics–Part B: Cybernetics, pp. 799-807, June 2008 (6 citations).
  3. A. Pnevmatikakis, F. Talantzis, J. Soldatos and L. Polymenakos, ‘Robust Multimodal Audio-Visual Processing for Advanced Context Awareness in Smart Spaces’, Personal and Ubiquitous Computing, Vol. 13, No. 1, pp. 3-14(12), Jan. 2009 (10 citations).
  4. A. Pnevmatikakis and L. Polymenakos, ‘Subclass Linear Discriminant Analysis for Video-Based Face Recognition’, Journal of Visual Communication and Image Representation, Vol. 20, Issue 8, pp. 543-551, Nov. 2009 (1 citation).
  5. V. Theodoreli, Th. Petsatodis, J. Soldatos, F. Talantzis and A. Pnevmatikakis, ‘ A Low-Cost Multi-Touch Surface Device supporting Effective Ergonomic Cognitive Training for the Elderly ’, International Journal of Ambient Computing and Intelligence, Vol. 2, No. 3, pp. 50-62, July-September 2010.
  6. Ch. Patrikakis, A. Pnevmatikakis, P. Chippendale, M. Nunes, R. Cruz, S. Poslad, Z. Wang, N. Papaoulakis, P. Papageorgiou, 'Direct your personal coverage of large athletic events', IEEE Multimedia, DOI 10.1109/MMUL.2010.69, November 2010.

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Conferences

Download publications list in BibTEX form

Sigma-Delta

  1. A. Pneumatikakis, V. Anastassopoulos and T. Deliyannis, ‘High Order ΣΔ IIR Filter Realization’, Proceedings of ECCTD’95, vol. 2, pp. 663-666, Aug. 1995. (1 citation)
  2. A. Pneumatikakis and T. Deliyannis, ‘Direct Processing of Sigma-Delta Signals’, Proceedings of ICECS’96, vol. 1, pp. 13-16, Oct. 1996 (2 citations).
  3. G. Bourdopoulos, A. Pneumatikakis and T. Deliyannis, ‘Second-Order Sigma-Delta Modulator Realization’, Proceedings of ICECS’96, vol. 1, pp. 85-88, Oct. 1996.
  4. A. Pneumatikakis, A. Constantinides and T. Deliyannis, ‘Optimization for Sigma-Delta Modulators’, Proceedings of DSP’97, pp. 661-664, July 1997.
  5. A. Pneumatikakis, A. Constantinides and T. Deliyannis, ‘Stabilization of Third-Order Single-Stage Sigma-Delta Modulators’, Proceedings of ECCTD’97, vol. 3, pp. 1480-1483, Aug. 1997.
  6. G. Bourdopoulos, A. Pneumatikakis and T. Deliyannis, ‘Generalized Linear Model for ΣΔ Modulators’, Proceedings of ICECS’98, vol. 2, pp. 275-278 1998.
  7. A. Pneumatikakis, G. Bourdopoulos, A. Consantinides and T. Deliyannis, ‘A Class of Reliable ΣΔ Modulators’, Proceedings of IMACS-CSC’98, vol 1, pp. 317-321, Oct. 1998.
  8. G. Bourdopoulos, A. Pneumatikakis and T. Deliyannis, ‘Optimal NTFs for Single-Bit ΣΔ Modulators’, Proceedings of DSP 2002, pp. 877-880, July 2002 (2 citations).

RF System-level Design

  1. G. Galanis, A. Pneumatikakis, L. Dermentzoglou, A. Arapoyanni and I. Moisiadis, ‘Building Block Specifications for Multi-mode Receivers’ Proceedings of IMACS-CSC’99, July 1999.
  2. L. Dermentzoglou, A. Arapoyanni and A. Pneumatikakis, ‘A direct conversion Receiver Analysis For Multimode TDMA Applications’, Proceedings of MELECON2000, Vol.1, pp. 318-321, Cyprus, May 2000. (8 citations)
  3. A. Pneumatikakis, L. Dermentzoglou, A. Arapoyanni and I. Moisiadis, ‘A 900MHz / 1800MHz / 1900MHz Superhet Receiver Engaging High IF1 For Image Rejection’, Proceedings of ICCDCS2000, Caracas Mexico, March 2000, pp. T21-1 to T21-6. (4 citations)
  4. L. Dermentzoglou, A. Pneumatikakis, A. Arapoyanni and I. Moisiadis, ‘A Multi-Mode Extra High IF1 Image Rejection Receiver for TDMA’, Proceedings of ICECS2000, Beirut Lebanon, Dec. 2000.

OFDM Modem

  1. S. Blionas, K. Masselos, C. Dre, C. Drosos, F. Ieromnimon, T. Pagonis, A. Pnevmatikakis, A. Tatsaki, T.Trimis, A. Vontzalidis and D. Metafas “A HIPERLAN/2 – IEEE 802.11a Reconfigurable System-on-Chip”, 2002 International Conference on Field Programmable Logic and Applications (FPL 2002). (1 citation)
  2. S. Blionas, K. Masselos, C. Dre, F. Ieromnimon, T. Pagonis, A. Pnevmatikakis, A. Tatsaki, T.Trimis, A. Vontzalidis and D. Metafas, “Design Story: A Hiperlan2/IEEE802.11x Reconfigurable SoC for indoor WLANs and outdoor wireless links. A pilot project for the future generation configurable wireless communications products”, Workshop on Heterogeneous Reconfigurable Systems on Chip, Chances, Application, Trends, April 2002. (1 citation)

Context from Video

  1. A. Pnevmatikakis and L. Polymenakos, ‘Comparison of Eigenface-Based Feature Vectors under Different Impairments’, 17th Int. Conf. Pattern Recognition 2004, vol. 1, pp. 296-300, Cambridge, UK, Aug. 2004. (18 citations)
  2. J. Soldatos, L. Polymenakos, A. Pnevmatikakis, F. Talantzis, K. Stamatis and M. Carras, 'Perceptual Interfaces and Distributed Agents supporting Ubiquitous Computing Services', Eurescom 2005. (15 citations)
  3. S. Azodolmolky, N. Dimakis, V. Mylonakis, G. Souretis, J. Soldatos, A. Pnevmatikakis and L. Polymenakos, ‘Middleware for In-door Ambient Intelligence: The PolyOmaton System’, 2nd Next Generation Networking Middleware Workshop (NGNM05), Waterloo, Canada, May 2005. (20 citations)
  4. A. Pnevmatikakis and L. Polymenakos, ‘An Automatic Face Detection and Recognition System for Video Streams’ 2nd Joint Workshop on Multi-Modal Interaction and Related Machine Learning Algorithms, Edinburgh, UK, July 2005. (18 citations)
  5. A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘Audio/Visual Person Identification’ 2nd Joint Workshop on Multi-Modal Interaction and Related Machine Learning Algorithms, Edinburgh, UK, July 2005. (7 citations)
  6. A. Pnevmatikakis and L. Polymenakos, ‘A testing methodology for face recognition algorithms’, in S. Renals and S. Bengio (Eds.): MLMI 2005, Lecture Notes in Computer Science 3869, pp. 218-229, Springer-Verlag, Berlin Heidelberg, 2006 (9 citations).
  7. A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘EBGM Vs Subspace Projection for Face Recognition’ International Conference on Computer Vision Theory and Applications, Setubal, Portugal, Vol. 2, pp. 131-137, Feb. 2006 (4 citations).
  8. H. Ekenel and A. Pnevmatikakis, ‘Video-Based Face Recognition Evaluation in the CHIL Project – Run 1’, Face and Gesture Recognition 2006, Southampton, UK, pp. 85-90, Apr. 2006. (26 citations)
  9. A. Pnevmatikakis and L. Polymenakos, ‘2D Multi-Person Tracking Using Kalman Filtering and Adaptive Background Learning in a Feedback Loop’, in R. Stiefelhagen and J. Garofolo (eds.): CLEAR 2006, Lecture Notes in Computer Science 4122, Springer-Verlag, Berlin Heidelberg, 2006. (13 citations)
  10. N. Katsarakis, G. Souretis, F. Talantzis, A. Pnevmatikakis and L. Polymenakos, ‘3D Audiovisual Person Tracking Using Kalman Filtering and Information Theory’, in R. Stiefelhagen and J. Garofolo (eds.): CLEAR 2006, Lecture Notes in Computer Science 4122, Springer-Verlag, Berlin Heidelberg, 2006. (5 citations)
  11. A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘A Decision Fusion System across Time and Classifiers for Audio-visual Person Identification’, in R. Stiefelhagen and J. Garofolo (eds.): CLEAR 2006, Lecture Notes in Computer Science 4122, Springer-Verlag, Berlin Heidelberg, 2006. (9 citation)
  12. A. Pnevmatikakis, L. Polymenakos and V. Mylonakis, ‘The AIT Outdoors Tracking System for Pedestrians and Vehicles’, in R. Stiefelhagen and J. Garofolo (eds.): CLEAR 2006, Lecture Notes in Computer Science 4122, Springer-Verlag, Berlin Heidelberg, 2006 (3 citations).
  13. E. Rentzeperis, A. Stergiou, C. Boukis, G. Souretis, A. Pnevmatikakis and L. Polymenakos, ‘An Adaptive Speech Activity Detector Based on Signal Energy and LDA’, 3rd Joint Workshop on Multi-Modal Interaction and Related Machine Learning Algorithms, 2006. (5 citations)
  14. A. Pnevmatikakis and L. Polymenakos, ‘Kalman Tracking with Target Feedback on Adaptive Background Learning’, in S. Renals, S. Bengio and J. Fiscus (Eds.): MLMI 2006, Lecture Notes in Computer Science 4299, Springer-Verlag, Berlin Heidelberg, pp. 114-122, 2006. (11 citations)
  15. E. Rentzeperis, A. Stergiou, C. Boukis, A. Pnevmatikakis and L. Polymenakos, ‘The 2006 Athens Information Technology Speech Activity Detection and Speaker Diarizaton Systems’, in R. Stiefelhagen and J. Garofolo (eds.), RT’06, Lecture Notes in Computer Science, Springer-Verlag, Berlin Heidelberg. (4 citations)
  16. E. Rentzeperis, A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘ Impact of Face Registration Errors on Recognition’, in I. Maglogiannis, K. Karpouzis and M. Bramer (eds.), Artificial Intelligence Applications and Innovations (AIAI06), Springer, Berlin Heidelberg, pp. 187-194, June 2006. (21 citations)
  17. A. Pnevmatikakis, F. Talantzis, J. Soldatos and L. Polymenakos, ‘Robust Multimodal Audio-Visual Processing for Advanced Context Awareness in Smart Spaces’, in I. Maglogiannis, K. Karpouzis and M. Bramer (eds.), Artificial Intelligence Applications and Innovations (AIAI06), Springer, Berlin Heidelberg, pp. 290-301, June 2006.
  18. A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘Enhancing the Performance of a GMM-based Speaker Identification System in a Multi-Microphone Setup’, InrterSpeech 2006, Pitsburgh, USA, Sept. 2006 (2 citations).
  19. F. Talantzis, A. Pnevmatikakis and L. Polymenakos, ‘Real Time Audio-Visual Person Tracking’, IEEE International Workshop on Multimedia Signal Processing (MMSP 2006), Victoria, Canada, Oct. 2006 (1 citation).
  20. A. Pnevmatikakis and L. Polymenakos, ‘Robust Estimation of Background for Fixed Cameras’, 15th International Conference on Computing (CIC2006), Mexico City, Mexico, Nov. 2006 (10 citations, Best paper award, 3rd place).
  21. A. Stergiou, G. Karame, A. Pnevmatikakis and L. Polymenakos, ‘The AIT face tracker for VACE multisite meeting recordings’, CLEAR 2007, Baltimore, USA, May 2007.
  22. G. Karame, A. Stergiou, N. Katsarakis, P. Papageorgiou and A. Pnevmatikakis, ‘2D and 3D Face Localization for Complex Scenes’, IEEE Int. Conf. on Advanced Video and Signal based Surveillance (AVSS 2007), London, UK, Sept. 2007 (6 citations).
  23. N. Katsarakis, A. Pnevmatikakis and M. Nechyba, ‘3D Tracking of Multiple People Using Their 2D Face Locations’, in C. Boukis, A. Pnevmatikakis and L. Polymenakos (eds.), Artificial Intelligence and Innovations 2007: From Theory to Applications (AIAI07), Springer, Berlin Heidelberg, pp. 365-374, Sept. 2007 (1 citation).
  24. E. Rentzeperis, C. Boukis, A. Pnevmatikakis and L. Polymenakos, ‘Combining Finite State Machines and LDA for Voice Activity Detection’, in C. Boukis, A. Pnevmatikakis and L. Polymenakos (eds.), Artificial Intelligence and Innovations 2007: From Theory to Applications (AIAI07), Springer, Berlin Heidelberg, pp. 323-330, Sept. 2007 (3 citations).
  25. A. Stergiou, G. Karame, A. Pnevmatikakis and L. Polymenakos, ‘The AIT 2D face detection and tracking system for CLEAR 2007’, in R. Stiefelhagen, R. Bowers and J. Fiscus (eds.): Multimodal Technologies for Perception of Humans (CLEAR 2007), Lecture Notes in Computer Science 4625, Springer-Verlag, Berlin Heidelberg, pp. 113-125, June 2008 (4 citations).
  26. N. Katsarakis, F. Talantzis, A. Pnevmatikakis and L. Polymenakos, ‘The AIT 3D Audio / Visual Person Tracker for CLEAR 2007’, in R. Stiefelhagen, R. Bowers and J. Fiscus (eds.): Multimodal Technologies for Perception of Humans (CLEAR 2007), Lecture Notes in Computer Science 4625, Springer-Verlag, Berlin Heidelberg, pp. 35-46, June 2008 (5 citations).
  27. A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘The AIT multimodal person identification system for CLEAR 2007’, in R. Stiefelhagen, R. Bowers and J. Fiscus (eds.): Multimodal Technologies for Perception of Humans (CLEAR 2007), Lecture Notes in Computer Science 4625, Springer-Verlag, Berlin Heidelberg, pp. 221-232, June 2008 (5 citations).
  28. A. Stergiou, A. Pnevmatikakis and L. Polymenakos, ‘The AIT outdoor tracker for vehicles and pedestrians in CLEAR 2007’, in R. Stiefelhagen, R. Bowers and J. Fiscus (eds.): Multimodal Technologies for Perception of Humans (CLEAR 2007), Lecture Notes in Computer Science 4625, Springer-Verlag, Berlin Heidelberg, pp. 148-159, June 2008 (2 citations).
  29. V. Mylonakis, J. Soldatos, A. Pnevmatikakis, L. Polymenakos, A. Sorin and H. Aronowitz, ‘Using Robust Audio and Video Processing Technologies to Alleviate the Elderly Cognitive Decline’, 1st International Conference on Pervasive Technologies Related To Assistive Environments (PETRA '08), July 2008 (1 citation).
  30. A. Anagnostopoulos and A. Pnevmatikakis, ‘A realtime mixed reality system for seamless interaction between real and virtual objects’, Digital Interactive Media in Arts and Entertainment (DIMEA 2008), Athens, Greece, Sept. 2008.
  31. N. Katsarakis, A. Pnevmatikakis and J. Soldatos, ‘Person Tracking for Ambient Camera Selection in Complex Sports Environments’, Digital Interactive Media in Arts and Entertainment (DIMEA 2008), Athens, Greece, Sept. 2008.
  32. N. Papaoulakis, N. Doulamis, Ch. Patrikakis, J. Soldatos, A. Pnevmatikakis and E. Protonotarios, ‘Real-Time Video Analysis and Personalized Media Streaming Environments for Large Scale Athletic Events’, ACM Multimedia 2008, Vancouver, BC, Canada, Oct. 2008 (2 citations).
  33. A. Stergiou, N. Katsarakis, A. Pnevmatikakis and L. Polymenakos, 'Detecting Single-Actor Events in Video Streams for TRECVid 2008', TRECVid 2008 workshop, USA, Nov. 2008.
  34. Ch. Doukas, I. Maglogiannis, N. Katsarakis and A. Pnevmatikakis, "Enhanced Human Body Fall Detection utilizing Advanced Classification of Video and Motion Perceptual Components", Artificial Intelligence Applications and Innovations (AIAI09), 2009 (3 citations).
  35. N. Katsarakis and A. Pnevmatikakis, ‘Event Detection in Athletics for Personalized Sports Content Delivery’, 10th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2009), London, UK, May 2009 (1 citation).
  36. S. Poslad, A. Pnevmatikakis, M. Nunes, E. Garrido Ostermann, P. Chippendale, P. Brightwell and Ch. Patrikakis, ‘Directing Your Own Live and Interactive Sports Channel’, 10th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2009), London, UK, May 2009 (4 citations).
  37. Ch. Doukas, I. Maglogiannis, A.N. Rouskas and A. Pneumatikakis, 'Emergency incidents detection in assisted living environments utilizing sound and visual perceptual components', 2nd international Conference on Pervasive Technologies Related To Assistive Environments (PETRA '09), Corfu, Greece, June 2009. 
  38. N. Katsarakis and A. Pnevmatikakis, ‘Face Validation Using 3D Information from Single Calibrated Camera’, DSP 2009, Santorini, Greece, July 2009 (1 citation).
  39. Th. Petsatodis, F. Talantzis, A. Pnevmatikakis and U. Diaz, ‘Interactive surfaces for enhanced cognitive care’, DSP 2009, Santorini, Greece, July 2009.
  40. Th. Petsatodis, Ch. Boukis and A. Pnevmatikakis, ‘Voice Activity Detection Using Audio-Visual Information’, DSP 2009, Santorini, Greece, July 2009.
  41. Th. Petsatodis, J. Soldatos, A. Pnevmatikakis and F. Talantzis, ‘Multi-Touch Surfaces as Motivating and Ergonomic Environments for Elderly Cognitive Training’, workshop on Designing Ambient Interactions for Older Users, AMI 2009, Salzburg, Nov. 2009.
  42. D. Facal, M.-F. Gonzalez, A. Navarro, C. Oppenauer, A. Geven, S. Prost, M. Tscheligi, T. Petsatodis, A. Pnevmatikakis, V. Theodoreli, E. Urdaneta and J. Yanguas, ‘Qualitative assessment of computerized-cognitive games for elderly people’, Abstracts of the IPA international meeting. In R. Mateos, K. Engedal and M. Franco (eds), pp. 294-295, 2010.
  43. A. Pnevmatikakis and F. Talantzis, ‘Person tracking in enhanced cognitive care: A particle filtering approach’, special session on Person tracking for assistive working and living environments, EUSIPCO 2010, Aalborg, Denmark, Aug. 2010.
  44. M. Andersen, R. Andersen, N. Katsarakis, A. Pnevmatikakis and Z.-H. Tan, ‘Three-dimensional adaptive sensing of people in a multi-camera setup’, special session on Person tracking for assistive working and living environments, EUSIPCO 2010, Aalborg, Denmark, Aug. 2010.
  45. A. Pnevmatikakis, N. Katsarakis, P. Chippendale, Cl. Andreatta, S. Messelodi, C. Modena and F. Tobia, ‘Tracking for Context Extraction in Athletic Events’, International Workshop on Social, Adaptive and Personalized Multimedia Interaction and Access (SAPMIA 2010), ACM Multimedia, Florence, Italy, Oct. 2010.
  46. P. Chippendale, A. Pnevmatikakis ‘Sports Indexing Through Camera and Content Understanding’, The 7th European Conference on Visual Media Production (CVMP 2010), London, UK, 17-18 Nov 2010.

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