Resident Professors

SOFIA TSEKERIDOU - Assistant Professor

CONTACT INFO

Mailing Address
Athens Information Technology
Building B7, 19.5 km Markopoulou Ave.
19002 Peania, Athens, Greece
Tel.: +30210 6682804
Fax: +30210 6682703
Email: sots@ait.edu.gr
sofia@ieee.org, stsekeridou@gmail.com

RESEARCH INTERESTS

  • Semantic-based and content-based analysis, management and retrieval of multimedia content
  • Context awareness and content adaptation, personalization, scalable resource representations
  • Metadata modeling and standards
  • Semantic Web, Knowledge engineering, Ontologies
  • Watermarking and Digital rights management

PROFESSIONAL EXPERIENCE

10/2005-01/2006 External collaborator, AIT, at part-time basis, involvement in EU FP6 IST R&D Projects ELEGI: E-learning Grid Infrastructure and BASE2: Broadband Access Satellite Enabled Education.
06/2005 – present Participation as senior (expert) researcher to 2 approved national PENED proposals:
  • PENED-1: Content-based Multimedia Archiving and Retrieval based on MPEG-7, ECE Dept. DUTH, Funded by: General Secretariat for Research and Technology
  • PENED-2: Automatic Identification in Video Data of Dangerous to Sensitive User Groups Content, EKPA, ECE Dept./DUTH, Demokritos, Funded by: General Secretariat for Research and Technology.
05/2005 – 01/2006 Coordinator of the approved national project: Pythagoras II – Sub-project: Video Watermarking for Copyright Protection
2003 – 2006 Senior researcher/collaborating academic at Integrated Research for Information Society / Cultural and Educational Technology Institute. Project Management and participation to:
  • Multimine: Multimedia Knowledge Mining, Human Network for Research and Technological Education, General Secretariat for Research and Technology, Coordinator: CERTH/ITI
  • POLYMNIA: Integrated system of music tools and music portal, General Secretariat for Research and Technology, Coordinator: Delta Singular
  • DIGITECH-III: Survey of Digitization Techniques in 3 Dimensions, funded by the Information Society
  • E-Learning Land: An Integrated Virtual Environment for Supporting On-Line Learning Communities

Other tasks: R&D proposal writing to request EU and national funding for research
01/2005 – 02/2005 Responsible for the organization of the 5th Multimine Educational Seminar for post-graduate students and company executives, with subject: Knowledge mining with emphasis on cultural and educational content.
07/2003 – 12/2003 External consultant, Dept. of International Cooperations, INTRACOM S.A. regarding the technical implementation of the European IST R&D Project MELISA: Multiplatform e-Publishing for Leisure and Interactive Sports Advertising
03/2003 Responsible for the organization of the INFORM Workshop with subject: User needs for the mobile electronic information services, Athens, Greece, in collaboration with EU Project INFORM, and within the framework of the MELISA Project.
2001 – 2003 Project and technical management tasks at the Development Programs Department (Digital Content Management Area), Research and Development Division, INTRACOM S.A. Involvement in the European IST R&D Projects:
  • MELISA: Multiplatform e-Publishing for Leisure and Interactive Sports Advertising,
  • PiSTE: Personalized Immersive Sports TV Experience
    PiSTE and MELISA present innovative interactive digital TV applications for production and consumption of enhanced content, greatly based on the DVB, MPEG-2, MPEG-4 and MPEG-7 standards

Other tasks: R&D proposal writing to request EU funding for research.
2000 – 2001 Administrative and research-related (technical) coordination of the RTN European Project MOUMIR (Models for Unified Multimedia Information Retrieval), 2000-2003.
1996 – 2001 Researcher at the Artificial Intelligence and Information Analysis Lab, Dept. of Informatics, Aristotle Univ. of Thessaloniki, Greece. Participation to EU funded R&D projects:
  • 2000-2003, CERTIMARK (Certification for watermarking techniques), IST, EC.
  • 2000-2003, MOUMIR (Models for Unified Multimedia Information Retrieval), RTN, EC (indirect contribution).
  • 1998-2000, INSPECT (Innovative Signal Processing Exploiting Chaotic Dynamics), LTR-ESPRIT, EC.
  • 1995-1998, NOBLESSE (Nonlinear Model-Based Analysis and Description of Images for Multimedia Applications), LTR-ESPRIT, EC.
  • 1995-1997, INSPECT, (Innovative Signal Processing Exploiting Chaotic Dynamics), LTR-ESPRIT, EC.
  • 1994-1996, MAVI (Model based analysis of video information), HCM, EC (indirect contribution).
  • 1992-1995, NAT (Nonlinear and adaptive digital image processing and computer vision), ESPRIT BRA, EC (indirect contribution).
15/7/1999 - 18/8/1999 Visiting researcher at the International Center of the Digital Signal Processing Lab, Tampere University of Technology, Finland. Continuation of previous year’s research work.
15/7/1998 - 15/8/1998 Visiting researcher at the International Center of the Digital Signal Processing Lab, Tampere University of Technology, Finland. Research work related to error concealment to MPEG-2 compressed video data by vector rational interpolation techniques.
1/10/1994 - 30/6/1995 Assistance to the organization of the international conference NSIP95, “1995 IEEE Workshop on Nonlinear Signal and Image Processing”, 20-22 June, Neos Marmaras, Halkidiki.
1/06/1994 -31/08/1994 Student trainee at the Automation Dept. (Lehrstuhl fuer Prozessautomatisierung) of Universitaet des Saarlandes, Saarbruecken, Germany. Training subject: behaviour modeling of dampers using Matlab, construction of a high voltage generator board, conduct of experiments related with hydrogel behaviour in an electromagnetic field.

REVIEWS/EVALUATIONS OF PROJECTS/PROPOSALS

  • 01/2006: Evaluator to IST FP6 4.1 call for proposals under the Strategic Objective: Networked Audio-Visual Systems and Home Platforms.

  • 07/2005: Appointed reviewer to the IST FP6 IP project AXMEDIS: Automating Production of Cross Media Content for Multichannel Distribution of the Strategic Objective: Semantic-based Knowledge and Content Systems

  • 07/2005: Appointed reviewer to the IST FP6 STREP project DANAE: Dynamic and Distributed Adaptation of Scalable Multimedia Content in a Context-aware Environment of the Strategic Objective: Networked Audiovisual Systems and Home Platforms

  • 06/2005: Approved as an evaluator of national proposals/surveys of the public domain submitted to the Information Society.

  • 02/2005: Reviewer to IST FP6 STREP projects Semantic-HiFi: Browsing, Listening, Interacting, Performing, Sharing on future Hi-Fi Systems, and SIVSS: Scalable Intelligent Video Server System of the Strategic Objective: Networked Audiovisual Systems and Home Platforms

  • 05/2003: Evaluator to IST FP6 1st call for proposals submitted to the Strategic Objective: Access to and preservation of cultural and scientific resources

STUDIES

1997-2001 Ph.D. studies, Dept. of Informatics, Aristotle Univ. of Thessaloniki, Greece. Supervising Professor: Dr. Ioannis Pitas. Title of Ph.D. thesis: “Techniques for digital processing, analysis and protection of still images and image sequences”. Graduation date: 01/03/2001. Ph.D. grade: highest.
1990-1996 Pre-graduate studies, Electrical and Computer Engineering Dept., Aristotle Univ. of Thessaloniki, Greece. Graduation date: 03/1996. Diploma grade: 8.31 (in a scale of 1-10).

SCIENTIFIC PROFILE

DISTINCTIONS

Book Publications:
Wiley Publishers, arrangements to co-edit book titled: “Cross-media entertainment services over heterogeneous networks”

Publications to International Scientific Journals:

  1. S. Tsekeridou, C. Kotropoulos, I. Pitas, “Adaptive Order Statistic Filters for the Removal of Noise from Corrupted Images”, SPIE Optical Engineering, vol. 37, no. 10, pp. 2798-2816, October 1998.
  2. S. Tsekeridou, I. Pitas, “MPEG-2 Error Concealment based on Block Matching Principles”, IEEE Transactions on Circuits and Systems for Video Technology, vol. 10, no. 4, pp. 646-658, June 2000.
  3. S. Tsekeridou, I. Pitas, “Content-based Video Parsing and Indexing based on Audio-Visual Interaction”, IEEE Transactions on Circuits and Systems for Video Technology, vol. 11, no. 4, April 2001.
  4. S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, “Statistical Analysis of a Watermarking System based on Bernoulli Chaotic Sequences”, Signal Processing, Elsevier, Special Issue on Information Theoretic Issues in Digital Watermarking, vol. 81, pp. 1273-1293, 2001.
  5. A. Tefas, A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou, I. Pitas, “Performance Analysis of Correlation-based Watermarking Schemes employing Markov Chaotic Chains”, IEEE Trans. on Signal Processing, vol. 51, no. 7, pp. 1979-1994, July 2003.
  6. A. Tefas, A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou and I. Pitas, “Markov chaotic sequences for correlation based watermarking schemes”, Chaos, Solitons & Fractals, vol. 17, no. 2-3, pp. 567-573, July 2003.
  7. S. Tsekeridou, F.Al. Cheikh, M. Gabbouj, I. Pitas, “Vector Rational Interpolation Schemes for Erroneous Motion Field Estimation Applied to MPEG-2 Error Concealment”, IEEE Trans. on Multimedia, December 2004.

Submissions to International Scientific Journals:

  1. S. Tsekeridou, I. Pitas, “Still Image Wavelet-based Watermarking Using Spatially Self-Similar Watermarks”, submitted, IEEE Trans. on Image Processing, 2005.
  2. S. Tsekeridou, “Metadata and User Profile Model for Personalized Enhanced DTV Multi-service Access”, submitted, IEEE Trans. on Multimedia, 2005.
  3. T. Pliakas, S. Tsekeridou, G. Kormentzas, “End-to-end QoS Management for Multimedia Streaming Applications”, submitted, ACM Computing Surveys

Publications to International Scientific Conferences:

  1. S. Tsekeridou, C. Kotropoulos, I. Pitas, “Morphological Signal Adaptive Median Filter for Noise Removal”, International Conference on Electronics, Circuits and Systems (ICECS 96), vol. 1, pp. 191-194, Rhodes, Greece, 13-16 October 1996.
  2. S. Tsekeridou, I. Pitas, C. Le Buhan, “An Error Concealment Scheme for MPEG-2 coded video sequences”, 1997 IEEE International Symposium on Circuits and Systems (ISCAS 97), vol. 2, pp. 1289-1292, Hong Kong, Hong Kong, 9-12 June 1997.
  3. S. Tsekeridou, I. Pitas, “Error Concealment Techniques in MPEG-2”, 1997 IEEE Workshop on Nonlinear Signal and Image Processing, (NSIP 97), Michigan, USA, 7-11 September 1997.
  4. S. Tsekeridou, C. Kotropoulos, I. Pitas, “Morphological Signal Adaptive Median Filter for Still Image and Image Sequence Filtering”, 1998 IEEE International Symposium on Circuits and Systems (ISCAS 98), California, USA, 31 May - 3 June 1998.
  5. S. Tsekeridou, I. Pitas, “Speaker Identification for Audio Indexing Applications”, 1998 IEEE International Conference on Telecommunications (ICT 98), vol. I, pp. 236-240, Porto Carras, Halkidiki, Greece, 22-25 June 1998.
  6. C. Kotropoulos, S. Tsekeridou, M. Gabrani, I. Pitas, “Adaptive LMS Order Statistic Filters with Variable Step-sizes”, 1998 IEEE International Conference on Telecommunications (ICT 98), vol. I, pp. 465-469, Porto Carras, Halkidiki, Greece, 22-25 June 1998.
  7. S. Tsekeridou, I. Pitas, “Facial Feature Extraction in Frontal Views using Biometric Analogies”, 1998 IX European Signal Processing Conference (EUSIPCO 98), vol. I, pp. 315-318, Rhodes, Greece, 8-11 September 1998.
  8. S. Tsekeridou, I. Pitas, “Speaker Dependent Video Indexing based on Audio-Visual Interaction”, 1998 IEEE International Conference on Image Processing (ICIP 98), vol. I, pp. 358-362, Chicago, Illinois, USA, 4-7 October 1998.
  9. S. Tsekeridou, F. Alaya Cheikh, M. Gabbouj, I. Pitas, “Motion Field Estimation by Vector Rational Interpolation for Error Concealment Purposes”, 1999 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 99), vol. 6, pp. 3397-3400, Phoenix, Arizona, USA, 15-19 March 1999.
  10. S. Tsekeridou, I. Pitas, “Audio-Visual Content Analysis for Content-based Video Indexing”, 1999 IEEE International Conference on Multimedia Computing and Systems (ICMCS 99), vol. I, pp. 667-672, Florence, Italy, 7-11 June 1999.
  11. S. Tsekeridou, F. Alaya Cheikh, M. Gabbouj, I. Pitas, “Application of Vector Rational Interpolation to Erroneous Motion Field Estimation for Error Concealment”, IEEE-EURASIP Workshop on Nonlinear Signal and Image Processing, (NSIP 99), Antalya, Turkey, 20-23 June 1999.
  12. S. Tsekeridou, I. Pitas, “Wavelet-based Self-similar Watermarking for Still Images”, 2000 IEEE International Symposium on Circuits and Systems (ISCAS 2000), vol. I, pp. 220-223, Geneva, Switzerland, 28-31 May 2000.
  13. S. Tsekeridou, F. Alaya Cheikh, M. Gabbouj, I. Pitas, “Motion Field Estimation by Combined Vector Rational and Bilinear Interpolation for MPEG-2 Error Concealment”, 2000 European Signal Processing Conference (EUSIPCO 2000), vol. III, pp. 1473-1476, Tampere, Finland, 5-8 September 2000.
  14. S. Tsekeridou, I. Pitas, “Embedding Self-Similar Watermarks in the Wavelet Domain”, 2000 IEEE Int. Conf. on Acoustics, Systems and Signal Processing (ICASSP 2000), vol. IV, pp. 1967-1970, Istanbul, Turkey, 5-9 June 2000.
  15. S. Tsekeridou, N. Nikolaidis, N. Sidiropoulos, I. Pitas, “Copyright Protection of Still Images Using Self-Similar Chaotic Watermarks”, 2000 IEEE Int. Conf. on Image Processing (ICIP 2000), vol. 1, pp. 411-414, Vancouver, Canada, 10-13 September 2000.
  16. N. Nikolaidis, S. Tsekeridou, A. Nikolaidis, A. Tefas, V. Solachidis, I. Pitas, “Applications of chaotic signal processing techniques to multimedia watermarking”, IEEE Workshop on Nonlinear Dynamics in Electronic Systems (NDES 2000), pp. 1-7, Catania, Italy, 18-20 May 2000.
  17. S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, “Bernoulli Shift Generated Chaotic Watermarks: Theoretic Investigation”, IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2001), Salt Lake City, Utah, USA, 7-11 May 2001.
  18. S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, “Theoretic Performance Analysis of a Watermarking System based on Bernoulli Chaotic Sequences”, Communications and Multimedia Security Conf. (CMS 2001), Darmstadt, Germany, 21-22 May 2001.
  19. S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, “Theoretic Investigation of the Use of Watermark Signals derived from Bernoulli Chaotic Sequences”, 12th Scandinavian Conference on Image Analysis 2001 (SCIA2001), Bergen, Norway, 11-14 June 2001.
  20. S. Tsekeridou, S. Krinidis, I. Pitas, “Scene Change Detection based on Audio-Visual Analysis and Interaction”, 2000 Multi-Image Search and Analysis Workshop, Schloss Dagstuhl, Germany, 12-17 March 2000, Lecture Notes in Computer Science, Springer Verlag, R. Klette, Th. Huang, G. Gimel'farb (eds.), LNCS 2032, 2001.
  21. S. Krinidis, S. Tsekeridou, I. Pitas, “Multimodal Interaction for Scene Boundary Detection”, IEEE-Eurasip Workshop on Nonlinear Signal and Image Processing (NSIP 2001), Baltimore, Maryland, USA, 3-6 June 2001.
  22. S. Tsekeridou, C. Kotropoulos, A. Ksafopoulos, I. Pitas, “Comparative study of speaker verification techniques based on vector quantization, sphericity models and dynamic time warping”, European Conf. On Circuit Theory and Design, Helsinki, Finland, 2001.
    23. C. Dalatsi, S. Krinidis, S. Tsekeridou, I. Pitas, “Use of Support Vector Machines based on Color and Motion Features for Shot Boundary Detection”, 2001 International Symposium on Telecommunications (IST 2001), Tehran, Iran, 1-3 September 2001.
  23. V. Solachidis, S. Tsekeridou, A. Tefas, I. Pitas, “A Simple Benchmarking System for Performance Evaluation of Still Image Watermarking Methods”, 2001 International Symposium on Telecommunications (IST 2001), Tehran, Iran, 1-3 September 2001.
  24. A. Nikolaidis, S. Tsekeridou, A. Tefas, V. Solachidis, I. Pitas, “A Survey of Watermarking Application Scenarios and Related Attacks”, 2001 IEEE International Conference on Image Processing (ICIP 2001), pp. 991-994, Thessaloniki, Greece, 7-10 October 2001.
  25. V. Solachidis, A. Tefas, N. Nikolaidis, S. Tsekeridou, A. Nikolaidis, I. Pitas, “A Benchmarking Protocol for Watermarking Methods”, 2001 IEEE International Conference on Image Processing (ICIP 2001), pp. 1023-1026, Thessaloniki, Greece, 7-10 October 2001.
  26. A. Tefas, A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou, I. Pitas, “Statistical Analysis of Markov Chaotic Sequences for Watermarking Applications”, IEEE Int. Symp. on Circuits and Systems (ISCAS 2001), Sydney, Australia, 6-9 May 2001.
  27. A. Tefas, A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou, I. Pitas, “Performance Analysis of Watermarking Schemes based on Skew Tent Chaotic Sequences”, IEEE-Eurasip Workshop on Nonlinear Signal and Image Processing (NSIP 2001), Baltimore, Maryland, USA, 3-6 June 2001.
  28. A. Tefas, A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou, I. Pitas, “Markov Chaotic Sequences for Correlation based Watermarking Schemes”, International Conference on Nonlinear Dynamics (NLD 2001), Thessaloniki, Greece, 27-30 August 2001.
  29. P. Papadimitriou, S. Tsekeridou, V. Tsaousidis, “Multimedia Streaming over the Internet”, HET-NETs’04, Bradford, UK, 26-28 July 2004.
  30. G. Pavlidis, S. Tsekeridou, C. Chamzas, “JPEG-matched data filling of Sparse Images”, IEEE Int. Conference on Image Processing, Singapoure, 2004
  31. P. Papadimitriou, V. Tsaousidis, S. Tsekeridou, “The impact of network and protocol heterogeneity on Real-Time Application QoS”, 10th IEEE Symposium on Computers and Communications (ISCC 2005), 2005
  32. S. Tsekeridou, “MPEG-7 MDS-based application specific metadata model for personalized multi-service access in a DTV broadcast environment”, IEEE Int. Conference on Multimedia & Expo (ICME05), Amsterdam, Netherlands, 6-8 July 2005
  33. S. Tsekeridou, “Metadata and User Profile Model for Personalized Enhanced DTV Multi-service Access”, IEEE Int. Conference on Image Processing (ICIP2005), Genova, Italy, 11-14 September 2005

    Dissertations:
  34. “Adaptive Filters for Still Images and Image Sequences”. Diploma thesis (1996, in greek), supervising professor: Dr. Ioannis Pitas, ECE Dept., AUTH, Greece.
  35. “Techniques for Digital Processing, Analysis and Protection of Still Images and Image Sequences”, Ph.D. Thesis (2001, in greek), supervising professor: Dr. Ioannis Pitas, Dept. of Informatics, AUTH, Greece.

Contributions to Standardization Bodies:

  1. S. Tsekeridou, A. Demiris, N. Ioannidis, “Enhanced Personalized Sports Broadcasting and Consumption: Potential Examples for and Extensions to Metadata, Personalization and System Description Issues”, AN322, 14th TV Anytime Forum Meeting, Geneva, Switzerland, 4-7 December 2001.
  2. S. Tsekeridou, A. Demiris, N. Ioannidis, “Input on draft BM CfC on TV-Anytime Phase Two: Targeting, Super Distribution and Extended PDR Services”, AN399, 16th TV Anytime Forum Meeting, Awaji Island, Japan, 19-22 March 2002.
  3. S. Tsekeridou, A. Demiris, N. Ioannidis, “Response to Business Models CfC on TV Anytime Phase Two Requirements”, AN415, 17th TV Anytime Forum Meeting, Montreal, Canada, 11-14 June 2002.
  4. S. Tsekeridou, A. Demiris, N. Ioannidis, “MELISA & PiSTE: TV Anytime Phase II example scenarios, related requirements and potential associated description attribute definitions”, AN456, 18th TV Anytime Forum Meeting, Geneva, Switzerland, 30 July – 2 August 2002.
  5. S. Tsekeridou (on behalf of MELISA consortium), “MELISA: overview and generic online gaming requirements definition”, MPEG02/m9031, MPEG Online Gaming Adhoc Group, October 2002.

REVIEW WORK

Scientific Journals

  • IEEE Transactions on Image Processing
  • IEEE Transactions on Signal Processing
  • IEEE Transcations on Circuits and Systems II
  • IEEE Transactions on Multimedia
  • Eurasip Signal Processing Journal, Elsevier
  • Real-time Imaging, Elsevier
  • SPIE Journal of Electronic Imaging
  • SPIE Optical Engineering Journal
  • IEEE Signal Processing Letters
  • IEE Signal Processing Letters
  • Journal of Mobile Multimedia

International Conferences

  • EUSIPCO 1998 / 2000 / 2004
  • ICIP 2001 / 2002 / 2003 / 2004 / 2005 / 2006
  • ISCAS 2004 / 2006
  • AIAI 2006
     

CITATIONS

  • The ISI Web of Science database outputs a total of 47 non self citations.

    • MEMBERSHIP TO INTERNATIONAL COMMITEES / ORGANIZATIONS / SOCIETIES

    • IEEE student member/member (since 1997), IEEE Signal Processing Society, IEEE Computer Society, IEEE Circuits and Systems Society, IEEE Communications Society.
    • IEEE Greek Section.
    • Technical Chamber of Greece (since 1996)

    SPECIAL SESSIONS, TUTORIALS, INVITED TALKS

    • “MPEG-2 Video Error Concealment”, 28/7/1998, Tampere University of Technology, Tampere, Finland (invited talk)
    • Tutorial lecture in collaboration with National Technical University of Athens (Dr. K. Karpouzis) during the Networking 2004 international conference, May 2004. Tutorial subject: Enabling integrated cross-media entertainment services over heterogeneous networks.
    • Special Session Co-organizer to IFIP Conference on Artificial Intelligence Applications & Innovations (AIAI), June 7-9, 2006, Athens, Greece, along with Dr. Nikos Nikolaidis, Lecturer, Dept. of Informatics, AUTH, Greece. Special Session Topic: Digital Rights Management Techniques and Interoperability of Protection Tools.