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    Personal information
    Contact information
    Candidate Profile
     Date Submitted:20-10-2013
     Last Modified:31-10-2013 (10:20)
    Job information
     Current job:Research Engineer, Teaching Assistant
     Employment Term:Permanent
     Job location:Europe only
     Date available:immediately
     Industry:, , Consulting/Engineering Services
     KeywordsImage processing, algorithms, research engineer, PhD


    Sex Male  

    Date of birth 15/07/1964

    Nationality Greek

    Marital status Married, with 3 kids





    2004 – Present









    2010 - 2013




    2010 - 2013




    1996 - 2003






    1992 – 1996







    National Service




    Research Engineer, Teaching Assistant

    Democritus University of Thrace, Electrical & Computer Engineering Department, Xanthi, Greece

    Participation in projects of the Laboratory

    Digital design using VHDL

    Administration of HPC cluster for parallel programming (MPI, OpenMP)

    Administration of various servers (Windows and Linux) of the Laboratory

    Teaching assistant, subject: Digital Systems



    Visiting Lecturer

    Technological Educational Institute of Kavala, Kavala, Greece

    Teaching subjects: Electrical Circuits, Computer Networks, Control Systems


    Visiting Lecturer

    Democritus University of Thrace, Production and Management Engineering Department

    Teaching subject: Computer Networks


    Technical Director

    Horizon Ltd., Xanthi, Greece

    The company activates in the area of computer networks, telecommunications, information technology  and is a sales point and technical operator of Forthnet network in the area of Xanthi. Forthnet is the second largest telco and internet provider in Greece.


    Researcher and Freelancer Electrical Engineer

    Democritus  University of Thrace, Greece

    Working in various research projects, developing algorithms for document image analysis, for medical imaging and for robot vision.


    At the same time working as a freelancer Electrical Engineer and Computer Programmer at some small projects.


    November 1990 – April 1992, I served with the Greek army.


    Member of the Technical Chamber of Greece. Former member of IEEE.











    1984 – 1989



    Honours and awards


    PhD, area Image Processing.

    Thesis with title: “Fast Algorithms for Binary Image Processing and Analysis”. Department of Electrical and Computer Engineering, Democritus University of Thrace, Xanthi, Greece


    Diploma of Electrical Engineering

    Democritus University of Thrace, Xanthi, Greece


    During my five years undergraduate education, I awarded twice from National Scholarship Foundation (IKY).





    Mother tongue


    Other language


    Communication skills

    Team work: I have worked in various types of teams from research to professional teams.

    Organisational / managerial skills

    During my work as Technical Director in Horizon Ltd, I organized  various  projects  and I also managed the technical staff of the company.


    Research and

    Development  expertise

    10+ years R&D experience in Image Processing and Analysis, Pattern Recognition, Algorithms and Hardware Architectures.

    Strong digital signal/image processing mathematical background

    Competent  in programming using the C, C++, Matlab, Linux shell scripting.

    VHDL RTL digital design.

    Computer Networks.

    Linux and Windows administration.

    Other skills

    Ability to work as a team member or independently.

    I have analytical thinking, I learn quickly and I also have a strong interest and experience in problem solving. Also I have willing to succeed.

    Driving licence

    European B






    The main concept of my research is the representation of the image by homogeneous image regions, called blocks. This  representation scheme is called Image Block Representation (IBR). The most important characteristic of the IBR is that a perception of image areas greater than a pixel is provided to the machine and, therefore, all the operations on the pixels belonging to a block may be substituted by a simple operation on the block.

    The development and implementation of new algorithms on block represented images, leads to the reduction of the required computational complexity.

    I developed fast algorithms for low and high level image processing and analysis tasks, such as image shift, scale and rotation, edge extraction, area measurement, connected component labeling, logic operations, fast thinning, fast parallel skeletonization, real-time moment computation etc.


    I have been participating in a number of research projects and applications, specifically:

    Development of OCR and OMR systems (document segmentation and CR).

    Medical imaging (MRI). The goal was the extraction of prior information from low resolution images, in order to omit MR scans and reduce the scanning time.

    Robot vision applications.

    Morphological and CL operations.


    Also, I developed imaging algorithms to a systolic hardware architecture called Scan Line Array processor.

    Journal papers

    Ι1.   N. Papamarkos, K. Tsirikolias, H. Spiliotis. " A new method for statistical character recognition", AMSE Review, AMSE Press, Vol. 17, No. 3, 1991, pp. 7-14.

    Ι2.   N. Papamarkos, I. Spiliotis and A. Zoumadakis, "Character Recognition by signature approximation", International Journal of Pattern Recognition and Artificial Intelligence, vol. 8, no. 5, pp. 1171-1187, 1994. This paper is also included in the book: H. Bunke, P.S.P. Wang and H.S. Baird, Document Image Analysis, World Scientific , 1994.

    Ι3.   Ι.Μ. Spiliotis and B.G. Mertzios, "Fast algorithms for basic processing and analysis operations on block representated binary images", Pattern Recognition Letters, Vol. 17, pp. 1437-1450, 1996.

    Ι4.   Ι.Μ. Spiliotis and B.G. Mertzios, “A Fast Parallel Skeletonization Algorithm on Block Represented Binary Images”, Elektrik, Vol. 1, No. 1, pp. 161-173, 1997.

    Ι5.   Ι.Μ. Spiliotis and B.G. Mertzios, "Real-time computation of two-dimensional moments on binary images using image block representation", IEEE Transactions on Image Processing, Vol. 7, pp. 1609-1615, 1998.

    Ι6.   I.M. Spiliotis and Y. Boutalis, "Parameterized real-time moment computation on gray images using block techniques", Journal of Real-Time Image Processing,Vol. 6, No. 2, pp. 81-91, June 2011.



    Conference papers

    ΙΙ1.  I.M. Spiliotis and B.G. Mertzios, "Real-time computation of statistical moments on binary images using block representation", Proceedings of 4th International Workshop on Time-Varying Image Processing and Moving Object Recognition, Florence, Italy, June 10-11, 1993.

    ΙΙ2.  I.M. Spiliotis, D.A. Mitzias and B.G.Me0.rtzios, "A skeleton-based hierarchical system for learning and recognition", Proceedings of MTNS 93, International Symposium on the Mathematical Theory of Networks and Systems, Regensburg, Germany, August 2-6, 1993.

    ΙΙ3.  R.C. Papademetriou, I.M. Spiliotis and B.G. Mertzios, "Maximum entropy pattern recognition using moment descriptors", Proceedings of 1995 IEEE Singapore International Conference on Signal Processing, Circuits and Systems, pp. 208-214, 3-7 July 1995, Singapore.

    ΙΙ4.  B.G. Mertzios, I.M. Spiliotis, R.C. Papademetriou and K. Tsirikolias, "Edge extraction and enhancement with coordinate logic filters using block represented images", Proceedings of the 12th European Conference on Circuit Theory and Design (ECCTD ‘95), pp. 1035-1038, 27-31 August 1995, Constantinoupolis.

    ΙΙ5.  I.M. Spiliotis and B.G. Mertzios, "Logic operations on 3-dimensional volumes using block representation", Proceedings of the International Workshop on Stereoscopic and Three Dimensional Imaging (IWS3DI'95), pp. 317-322, 6-8 September 1995, Fera, Santorini, Greece.

    ΙΙ6.  I.M. Spiliotis, D. van Ormondt and B.G. Mertzios, "Prior knowledge for improved image estimation from raw MRI data", accepted to 2nd Iternational Workshop on Image and Signal Processing: Theory, Methodology, Systems and Applications, Budapest, Hungary, November 8-10, 1995.

    ΙΙ7.  B.G. Mertzios, I.M. Spiliotis and N. Papamarkos, "Image block representation and its applications to manufacturing and automation", 5th International Workshop on Time-Varying Image Processing and Moving Object Recognition, September 5-6, 1996, Florence, Italy.

    ΙΙ8.  I.M. Spiliotis and B.G. Mertzios, "Real-time Computation of 2-D Moments on Block Represented Binary Images on the Scan Line Array Processor", VIII European Signal Processing Conference (EUSIPCO-96), September 10-13, 1996, Trieste, Italy.


    Conference papers

    ΙΙ9.  Iraklis M. Spiliotis, Panagiotis Liatsis, Basil G. Mertzios and Yannis P. Goulermas, "An neural approach to invariant character recognition", 3rd International Workshop on Signal/Image Processing, November 4-7, 1996, Manchester, UK.

    ΙΙ10.        G.J. Marseille, C. van Meijeren, I.M. Spiliotis, D. van Ormondt and B.G. Mertzios, "Bayesian Image Estimation from Sparse Raw MRI Data", Fourth IMA International Conference on Mathematics in Signal Processing, 17-19 December, 1996, Coventry, UK.

    ΙΙ11.        Ι.Μ. Spiliotis and B.G. Mertzios, “A Fast Skeleton Algorithm on Block Represented Binary Images”, 13th International Conference on Digital Signal Processing (DSP97), July 2-4, 1997, Santorini, Hellas.

    ΙΙ12.        Ι.Μ. Spiliotis and B.G. Mertzios, “Fast Computation of the Radon Transform on Block Represented Binary Images”, Proceedings of 5th International Workshop on Systems, Signals and Image Processing, June 3-5, 1998, Zagreb, Croatia, pp. 164-167.

    ΙΙ13.        Ι.Μ. Spiliotis and B.G. Mertzios, “Image Block representation and Its Applications in Manufacturing and Automation”, 2ο Conf on Technology and Automation, October 2-3 1999, Thessaloniki, Greece.

    ΙΙ14.        I.M. Spiliotis and Y. Boutalis, "Fast and Real-time moment computation methods of gray images using image block representation", Proceedings of 5th IASTED Intern. Conf. on Signal Proc., Pattern Recogn. and Applications (SPPRA-2008),pp. 323-328, Innsbruck, Austria, Febr. 13-15, 2008.






    1.    1992-1993. Project Stride Hellas 8 funded by GSRT with title “Recognition and compression of documents”.

    2.    1995-1996: Project Human Capital and Mobility funded by the European Community, with title “Advanced signal processing, magnetic resonance and spectroscopy”.

    3.    1995: Project with title “Development of robotic vision system” funded by TSMEDE.

    4.    1995-1996. Project for Cooperation with British University UMIST funded by GSRT and the British Council with title “Smart Object Manipulation and Assembly in FMS systems”.

    5.    1996: Project for Cooperation with Technical University of Sofia, Bulgaria, funded by GSRT and the Bulgarian Ministry of Industry with title “Adaptive Robot control and vision system”.

    6.    1997: Project with title “External robot control and software development” funded by TSMEDE.

    7.    1999. Project with title “Comparative study of morphological filters and CL filters”, funded by TSMEDE.

    8.     2007. Project with title “Development of the infrastructure of Digital Systems Laboratory, DUTH”, funded by TSMEDE.


    There are about 60 references from other researchers  to my papers. The citation list is available upon request.


    I  am serving as reviewer for the following journals:

    Pattern Recognition

    Pattern Recognition Letters

    Journal of Real-Time Image Processing

    Biomedical Signal Processing and Control

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