Global overview on my career
I obtained the diploma of “Polytechnic School” in Paris, which is ranked n°1 engineering school in France, in 1977. Then, I obtained the diploma of “Telecommunication School”, which is in the best five engineering schools in France (and n°1 for Computer Science in France) in 1979.
In 1979, I got a position of “Associate Professor” in Computer Science in a famous engineering school of Africa, the ENSTP of Yamoussoukro (Ivory Coast), in which I started to develop research in the field of Computer Graphics.
From 1981 to 1991, I had been a researcher at the IBM Paris Scientific Center (in Paris – France). I obtained my PhD in 1982 with the support of the IBM France Company, and then, I was considered as an expert in the field of Image Processing and Computer Graphics for the IBM in Europe (I gave tutorials in these fields to the IBM engineers of Europeans countries, and also in International Conferences). In 1983, I was sent to United States for six months to participate to the design of the first color graphics workstation (the IBM 5080). Then, in the mid 80s, I started to supervise PhD students, and I obtained my “Habilitation to Supervise Research” in 1987: this habilitation is mandatory to apply to a position of “Full Professor” at the university in France. During the second part of the 80s, I had been the manager of a research group in the IBM and I started collaborations with other structures (as hospitals for “Medical Imaging”, …).
In 1991, I was recruited directly as a “Full Professor” at the “Aix-Marseille University” and I was asked to create an activity in the field of “Image” in the area of Marseilles (such an activity didn’t exist in Marseilles and its region at this time). I created a whole set of curricula, and especially a Master Degree in “Image”; I also created a laboratory of about 200 researchers, about Computer Science, Systems and Information, and I was the Vice-Director of this laboratory (LSIS Laboratory); I created a research group of about 40 researchers on “Image Processing and Computer Graphics” in the LSIS, and I was the head of this research group. I also worked to set relations with industrial and to develop an international activity.
“State Doctorate” Thesis defended at the University of Besançon on “Interactive Modeling of Complex Shape Objects from Heterogeneous Data – Application to the Representation of Anatomical Structures”
“Doctor-Engineer” Thesis defended at the ENST on “Study and Development of an Algorithm for Hidden Surface Elimination”
134 publications including 40 in journals and books, 62 in international conferences (with reviews and proceedings), 28 in national conferences (with proceedings) and 4 patents Supervision of 30 PhD theses (27 passed and 3 in process) and 30 Master research works Referee for 95 PhD theses and “Habilitations to Supervise Research”, including 51 as main reviewer.
My research activity deals with image analysis, geometrical modeling and image synthesis. The goal of the research groups I created (LXAO and then SimGraph) was to perform data fusion from images, to extract information from these data, to integrate it into a model and to display it in a way that communicates the relevant information to a specific end user.
This activity is not dedicated to a given application field but to several ones such as Remote Sensing, Medical Imaging, Video Watching, Simulation, knowing that my research group and myself are not specialized in each of these fields. For this reason, I have set partnerships with various institutes, institutions or companies that are specialized in these fields, my contribution being in the area of mathematic and algorithmic for image understanding and image production.
My field of expertise is related to algorithmic, to pattern recognition, to image segmentation and registration, to geometrical modeling and to scientific visualization. I have projects on “Image Enhancement” for video watching and Forensics with the National Scientific Police Institute in France, I work on “Image Registration” for Remote Sensing with the RADI (Chinese Academy of Sciences) and other institutes, I develop research on “3D Reconstruction from clouds of points” in the frame of partnerships with companies that use Underwater Sonar to detect and characterize specific objects in the sea (Coast Watching), I designed a method (and obtained a patent for it) to perform real-time wire detection using a LIDAR (for helicopters), and I defined several reconstruction approaches for 3D anatomical structure representation, especially in the frame of collaboration with medical institutions.
During the last ten years, I have developed bilateral collaborations with many countries such as Portugal (University of Aveiro), United States (University of California Berkeley), but the main ones are with:
In 2006, I participated in the creation of an international organization, ISDE (International Society for Digital Earth) of which I had been an Executive Committee member for ten years; and I also participated in the creation of an international journal, IJDE (International Journal of Digital Earth – Taylor & Francis Edition).
I am also involved in the organization of international workshops (such as TAIMA, every two years in Tunisia) and conferences or summits (every year with the ISDE), or as a reviewer for several international journals and conferences (I am the reviewer for about 20 papers and 4 PhD per year).
Besides fundamental research activities, I have developed industrial partnerships that gave me the opportunity to increase the value of this activity through technology transfers (patents, licensing,).The companies I recently worked with are:
I teach all courses that deal with images (image processing, pattern recognition, geometrical modeling, scientific visualization, simulation) and algorithmic at all levels (Bachelor and Master degrees) and to any audience (in various countries, to professional and to students).
A selection of recent relevant publications (sorted from the most recent to the oldest):
Y. Li, S. Mavromatis, F. Zhang, Z. Du, J. Sequeira, Z. Wang, X. Zhao, and R. Liu – “Single-Image Super Resolution for Remote Sensing Images Using a Deep Generative Adversarial Network with Local and Global Attention Mechanism” – in IEEE Transactions on Geoscience and Remote Sensing, pp. 1-24, July 12th 2021. DOI : 10.1109/TGRS.2021.3093043.
N. Jin, S. Mavromatis, J. Sequeira, and S. Curcio – “A Robust Method of Eye Torsion Measurement for Medical Applications” – in MDPI Information, 11(9), 408, 2020. DOI : 10.3390/info11090408.
A. Chergui, S. Ouchtati, S. Mavromatis, S. E. Bekhouche, J. Sequeira, and F. Dornaika – “Kinship verification through facial images using multiscale and multilevel handcrafted features” – in SPIE Journal of Electronic Imaging 29(2), 2020. DOI : 10.1117/1.JEI.29.2.023017.
A. Chergui, S. Ouchtati, S. Mavromatis, S. E. Bekhouche, M. Lashab, and J. Sequeira – “Kinship verification through facial images using cnn-based features” – in Traitement du Signal, vol. 37, no. 1, pp. 1–8, 2020. DOI: 10. 18280/ts.370101.
M. Qin, S. Mavromatis, L. Hu, F. Zhang, R. Liu, J. Sequeira, and Z. Du - “Remote sensing single-image resolution improvement using a deep gradient-aware network with image-specific enhancement” – in "Remote sensing" Journal, vol. 12, n° 5, 2020, ISSN : 2072-4292. DOI:10.3390/rs12050758.
S. Ouchtati, A. Chergui, S. Mavromatis, D. Rafik, B. Aissa, and J. Sequeira - “Novel method for brain tumor classification based on use of image entropy and seven hu’s invariant moments” – in "Traitement du signal" Journal, vol. 36, iss. 6, pp. 483-491, 2019.
A. Chergui, S. Ouchtati, S. Mavromatis, J. Sequeira – “Investigating deep cnns models applied in kinship verification through facial images” – in 5th international conference on frontiers of signal processing, icfsp - Marseille - France – September 2019.
R. Girard, S. Mavromatis, J. Sequeira, N. Belanger, G. Anoufa – “A vision-based assistance key differentiator for helicopters automonous scalable missions” – in 20th towards autonomous robotic systems conference, taros 2019 - London - United Kingdom – July 2019.
A. Chergui, S. Ouchtati, S. Mavromatis, S. E. Bekhouche, J. Sequeira – “Kinship verification using mixed descriptors and multi block face representation” – in 5th international conference on frontiers of signal processing, icfsp - Annaba - Algeria – June 2019.
A. Monneau, K. N. M’Sirdi, S. Mavromatis, G. Varra, M. Salesse, J. Sequeira – “Adaptive prediction for ship motion in rotorcraft maritime operations” – in 5th ceas conference on guidance, navigation and control – eurognc19 - Milano - Italy – April 2019.
A. Chergui, S. Ouchtati, J. Sequeira, S.E. Bekhouche, F. Bougourzi, H. Telli – “Deep features for kinship verification from facial images” – In Proceeding of The Third International Conference on Advanced Systems and Emergent Technologies IC-ASET 19 – Hammamet - Tunisia – March 2019.
A. Chergui, S. Ouchtati, J. Sequeira, A. Benlamoudi, H. Telli, S.E. Bekhouche – “Robust Kinship Verification using Local Descriptors” – International Conference on Technological Advances in Electrical Engineering (ICTAEE'18) - Skikda - Algeria – December 2018.
A. Chergui, S. Ouchtati, J. Sequeira, S.E. Bekhouche, F. Bougourzi, A. Benlamoudi – “Discriminant Analysis for Facial Kinship Verification using Color Images” – Second International Conference on Electrical Engineering ICEEB’2018, Biskra - Algeria – December 2018.
A. Chergui, S. Ouchtati, J. Sequeira, S.E. Bekhouche, F. Bougourzi – “Kinship verification using BSIF and LBP” – 4th International Conference on Signal, Image, Vision and their Applications (SIVA'18), Guelma – Algeria – November 2018.
P. Zoppitelli, S. Mavromatis, J. Sequeira, G. Anoufa, N. Belanger, F.X. Fillias – “Embedding intelligent image processing algorithms: the new safety enhancer for helicopters missions” – in 44th european rotorcraft forum – ERF 2018, Delft – The Netherlands – September 2018.
S. Ouchtati, J. Sequeira, B. Aissa, R. Djemili, M. Lashab – “Brain tumor classification from MR Images using a neural network and the central moments” – 2018 IEEE International Conference on Advanced Systems and Electric Technologies (IC_ASET) – Hammamet - Tunisia – March 2018.
D. Huang, Y. Wang, W. Song, J. Sequeira, S. Mavromatis – “Shallow water image enhancement using relative global histogram stretching based on adaptive parameter acquisition” – MMM 2018 (MultiMedia Modeling) International Conference – Bangkok – Thailand – February 2018 (Proceedings edited at Springer Verlag).
P. Zopitelli, S. Mavromatis, J. Sequeira – “Ellipse detection in very noisy environment” – WSCG 2017 International Conference on Computer Graphics, Visualization and Vision – Plzen – Czech Republic – June 2017.
Z. Du, Y. Guo, C. Zhang, F. Zhang, R. Liu, J. Sequeira – “ParSymG: a parallel clustering approach for unsupervised classification of remotely sensed imagery” – International Journal of Digital Earth – 2016.
S. Ouchtati, J. Sequeira, M. Lashab, M. Bedda, "A Neural Network and Central Moments of Zones Histograms Obtained by Sliding a Window on the MRI Brain Image for the Classification of Brain Tumors", Proceedings of the International Symposium on Computer Science and Computer Engineering (ISCSCE 2016), pp: 40-52, Hambourg, Germany - September 4-5, 2016.
J. Zhang, S. Mavromatis, Q. Meng, J. Sequeira, Z. Ying – “Using mathematical morphology on lidar data to extract information from urban vegetation” – IGARSS, July 2016, Beijing, China.
S. Ouchtati, J. Sequeira, M. Bedda – “A Neural Approach for the Offline Recognition of the Arabic Handwritten Words of the Algerian Departments” – International Journal of Computer, Electrical, Automation, Control and Information Engineering, World Academy of Science, Engineering and Technology – 2015, 9, pp.1910-1916.
S. Ouchtati, J. Sequeira, M. Bedda – “Features Extraction Methods for the Handwritten Words of the Algerian Departments” - ICPRMA Paris 2015: 17th International Conference on Pattern Recognition Methods and Applications, Paris, August 2015.
S. Mavromatis, J. Sequeira - "3D Reconstruction of Sport Scenes", in: Wiley, 3D Video, Ch. 20, pp. 405-420, December 2013.
G. Thibault, B. Fertil, S. Pereira, Cl. Navarro, P. Cau, N. Levy, J. Sequeira, J-L Mari - "Shape and texture indexes - Application to cell nuclei classification", in: International Journal of Pattern Recognition and Artificial Intelligence (IJPRAI), Vol. 27 (1), pp. 1357002 (23 pages) – 2013.
S. Mavromatis, Ch. Palmann, J. Sequeira – “Characterization of Similar Areas of Two 2D Point Clouds” – Advances in Visual Computing, July 2012, Crete, Greece. Springer Berlin Heidelberg, pp.509--516, 2012
Ch. Palmann, S. Mavromatis, and J. Sequeira. “A new geometric invariant to match regions within remote sensing images of different modalities”. SPIE Europe Remote Sensing, Prague, Czech Republic, September 2011.
M. Jourdain, J. Meunier, J. Sequeira, J-Cl Tardif, G. Cloutier, “Intravascular Ultrasound Image Segmentation: A Helical Active Contour Method”, IPTA 2010 (international conference on image processing theory, tools and applications), Paris, France, July 2010.
E. Selvan, A. Mustatea, C. Xavier, and J. Sequeira. “Accurate Estimation of ICA Weight Matrix by Implicit Constraint Imposition Using Lie Group”. IEEE Transactions on Neural Networks, 20(10):1565-1580, October 2009.
Ch. Palmann, S. Mavromatis, J. Sequeira - "Method and system for estimating a similarity between two binary images", Vol. US20140044362, WO2012117210A1, International Patent, February 2014.
F-X. Filias and J. Sequeira. “Method for telemetric detection of suspended wire-like objects”, International Patent, January 2007. Note: PCT: WO 2007/010113 A1.