Publications

 Books

1. C. Panagiotakis, Motion Analysis and Synthesis from Video with Multimedia Applications, Lambert Academic Publishing, ISBN: 978-3-8383-4102-6, 2010.

2. ΖΑΙΡΗΣ Γ. ΑΝΤΩΝΗΣ, ΛΕΜΟΝΑΚΗΣ ΧΡΗΣΤΟΣ, ΠΑΝΑΓΙΩΤΑΚΗΣ ΚΩΝΣΤΑΝΤΙΝΟΣ, ΣΤΑΜΑΤΗΣ ΓΙΩΡΓΟΣ, ΔΙΟΙΚΗΣΗ ΕΠΙΧΕΙΡΗΣΙΑΚΗΣ ΕΠΙΚΟΙΝΩΝΙΑΣ ΚΑΙ ΜΑΡΚΕΤΙΝΓΚ,  Εκδότης: ΚΡΙΤΙΚΗ,  ISBN: 9789605863838, 2021.

Journals

1. C. Panagiotakis and G. Tziritas, A speech/music discriminator based on RMS and zero-crossings, IEEE Transactions on Multimedia, Vol. 7, No. 1, Feb. 2005.

2. N. Komodakis, C. Panagiotakis and G. Tziritas, 3D visual reconstruction of large scale natural sites and their fauna, Signal Processing: Image Communication, Vol. 20, No. 9-10, pp. 869-890, Oct. 2005.

3. C. Panagiotakis and G. Tziritas, Snake terrestrial locomotion synthesis in 3D virtual environments, Visual Computer,  Vol. 22, No. 8, pp. 86-98, 2006.  

4. C. Panagiotakis and G. Tziritas, Any dimension polygonal approximation based on equidistance principle, Pattern Recognition Letters, Vol. 28, No. 5, pp. 582-591, 2007.  

5. E. Ramasso, C. Panagiotakis, M. Rombaut, D. Pellerin, Human action recognition in videos based on the Transferable Belief Model, Application to athletics jumps, Pattern analysis and Applications, Vol. 11, No. 1, pp. 1-19, 2008.

6. C. Panagiotakis, E. Ramasso, G. Tziritas, M. Rombaut and D. Pellerin, Shape-based Individual/Group Detection for Sport Videos Categorization, International Journal of Pattern Recognition and Artificial Intelligence (IJPRAI), Vol. 22, No. 6, pp. 1187 - 1213, 2008.

7. C. Panagiotakis, E. Kokinou, F. Vallianatos, Automatic P Phase Picking Based on Local Maxima Distribution,  IEEE Trans. on Geoscience and Remote Sensing, Vol. 46, No. 8, 2008.

8. E. Ramasso, C. Panagiotakis, M. Rombaut, D. Pellerin, G. Tziritas, Human Shape-Motion Analysis for Action/Activity Recognition Applied to Athletic Videos, Electronic Letters on Computer Vision and Image Analysis, Vol. 7, No. 4, pp. 32-50, 2009.

9. C. Panagiotakis, A. Doulamis and G. Tziritas, Equivalent Key Frames Selection Based on Iso-Content Principles, IEEE Trans. on Circuits and Systems for Video Technology, Vol. 19, No. 3, pp. 447 - 451, 2009.

10. C. Panagiotakis, K. Athanassopoulos and G. Tziritas, The equipartition of curves, Computational Geometry: Theory and Applications, Vol. 42, No. 6-7, pp. 677-689, 2009.

11. E. Ramasso, C. Panagiotakis, M. Rombaut and D. Pellerin, Belief Scheduler based on model failure detection in the TBM framework. Application to human activity recognition, International Journal of Approximate Reasoning,  vol. 51, pp. 846-865, 2010.

12. C. Panagiotakis, E. Kokinou and A. Sarris, Curvilinear Structure Enhancement and Detection in Geophysical Images, IEEE Trans. on Geoscience and Remote Sensing, vol. 49, no. 6, pp. 2040-2048, 2011.

13. C. Panagiotakis, I. Grinias and G. Tziritas, Natural Image Segmentation based  on Tree Equipartition, Bayesian Flooding and Region Merging,   IEEE Transactions on Image Processing, Vol. 20, No. 8, pp. 2276 - 2287, Aug. 2011. 

14. H. Papadakis, C. Panagiotakis and P. Fragopoulou, Locating Communities on Real Dataset Graphs Using Synthetic Coordinates, Parallel Processing Letters (PPL), vol. 22, no. 1, Jan. 2012.

15. C. Panagiotakis, N. Pelekis, I. Kopanakis, E. Ramasso and Y. Theodoridis, Segmentation and Sampling of Moving Object Trajectories based on Representativeness, IEEE Trans. on Knowledge and Data Engineering, vol. 24,no. 7, Jul. 2012. 

16. C. Panagiotakis and G. Tziritas, Successive Group Selection for Microaggregation, IEEE Trans. on Knowledge and Data Engineering, vol.25, no.5, pp.1191-1195, May 2013.

You can download the 216 synthetic datasets  that have been used in the article.

17. H. Papadakis, C. Panagiotakis and P. Fragopoulou, Locating Communities on Graphs with variations in Community Sizes,  Journal of Supercomputing, vol. 65, no.2, pp. 543-561, Aug. 2013.

18. C. Panagiotakis, H. Papadakis, E. Grinias, N. Komodakis, P. Fragopoulou and G. Tziritas, Interactive Image Segmentation Based on Synthetic Graph Coordinates, Pattern Recognition, vol. 46, no. 11, pp. 2940-2952, Nov. 2013.

19. H. Papadakis, C. Panagiotakis and P. Fragopoulou, Distributed detection of communities in complex networks using synthetic coordinates, Journal of Statistical Mechanics: Theory and Experiment, vol. 2014, no. 3, pp. P03013, 2014.

20. C. Panagiotakis, Point Clustering via Voting Maximization, Journal of Classification, vol. 32, no. 2, pp. 212-240, 2015.

21. C. Panagiotakis and E. Kokinou, Linear Pattern Detection of Sea Faults via a Topology and Shape Optimization Method, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 8, no. 1, pp. 3-11, 2015.

22. C. Panagiotakis and G. Tziritas, A minimum spanning tree equipartition algorithm for microaggregation, Journal of Applied Statistics, vol. 42, no. 4, pp. 846-865, 2015.  

23. D. Michel, C. Panagiotakis and A. Argyros, Tracking the articulated motion of the human body with two RGBD cameras, Machine Vision and Applications, vol. 26, no. 1, pp.41-54,  2015.

24. TM Alves,E. Kokinou,G. Zodiatis, R. Lardner,C. Panagiotakis and H. Radhakrishnan, Modelling of oil spills in confined maritime basins: The case for early response in the Eastern Mediterranean Sea, Environmental Pollution,pp. 390-399, 2015. 

25. C. Panagiotakis and A. Argyros, Parameter-free Modelling of 2D Shapes with Ellipses, Pattern Recognition, vol. 53, pp. 259-275, 2016. 

26. I. Grinias , C. Panagiotakis and G. Tziritas, MRF-based Segmentation and Unsupervised Classification for Building and Road Detection in Peri-urban Areas of High-resolution, ISPRS Journal of Photogrammetry and Remote Sensing, vol. 122, pp. 145-166, 2016.

27. TM Alves,E. Kokinou,G. Zodiatis, R. Lardner,C. Panagiotakis and H. Radhakrishnan, Multidisciplinary oil spill modeling to protect coastal communities and the environment of the Eastern Mediterranean Sea, Scientific Reports - Nature 6, 2016. 

28. C. Panagiotakis and E. Kokinou, Unsupervised Detection of Topographic Highs with Arbitrary Basal Shapes Based on Volume Evolution of Isocontours,  Computers & Geosciences, vol. 102, pp. 22-33, 2017.

29. H. Papadakis, C. Panagiotakis and P. Fragopoulou, SCoR: A Synthetic Coordinate based Recommender System, Expert Systems with Applications, vol. 79, pp.8-19, 2017.  

30. E. Kokinou, E Toulia and C. Panagiotakis, The contribution of pattern recognition techniques in geomorphology and geology: the case study of Tinos island (Cyclades, Aegean, Greece), European Journal of Remote Sensing,  vol. 1, pp. 88-99,2018.

31.  C. Panagiotakis, K. Papoutsakis and A. Argyros, A graph-based approach for detecting common actions in motion capture data and videos. Pattern Recognition, vol. 79, pp. 1-11, 2018.

32. E. Kokinou and C. Panagiotakis, Structural pattern recognition applied on bathymetric data from the Eratosthenes Seamount (Eastern Mediterranean, Levantine Basin), Geo-Marine Letters , pp 1–14 , 2018.

33. S. Markaki, C. Panagiotakis, D. Lasthiotaki, Image Sorting via a Reduction to Traveling Salesman Problem,  IET Image Processing, vol. 14, no. 1, pp. 31-39, 2020.

34. C. Panagiotakis and A. Argyros, Region-based Fitting of Overlapping Ellipses and its Application to Cells Segmentation, Image and Vision Computing, Elsevier, vol. 93, pp. 103810, 2020. 

35. C. Panagiotakis, H. Papadakis, and P. Fragopoulou, Unsupervised and Supervised Methods for the Detection of Hurriedly Created Profiles in Recommender Systems, International Journal of Machine Learning and Cybernetics, 2020 . 

36.  E. Kokinou and C. Panagiotakis, Automatic pattern recognition of tectonic lineaments in seafloor morphology to contribute in the structural analysis of potentially hydrocarbon-rich areas, Remote Sensing, 2020. 

37. C. Panagiotakis, H. Papadakis and P. Fragopoulou, A Dual Hybrid Recommender System based on SCoR and Random Forest, Computer Science and Information Systems, 2020. 

38. C. Panagiotakis, H. Papadakis, A. Papagrigoriou, and P. Fragopoulou, Improving Recommender Systems via a Dual Training Error based Correction Approach, Expert Systems with Applications, 2021.

39. C. Panagiotakis, H. Papadakis, A. Papagrigoriou, and P. Fragopoulou, DTEC: Dual Training Error based Correction approach for Recommender Systems, Software Impacts, 2021. 

40. J. Fanourgiakis, C. Panagiotakis and I. Konstantourakis, Exploring the Research-based Ranking and the University Impact in Greece: A Case of Peripheral Departments of Management and Economics, COLLNET Journal of Scientometrics and Information Management, 2021.

41. H. Papadakis, A. Papagrigoriou, C. Panagiotakis, E. Kosmas and P. Fragopoulou, Collaborative Filtering Recommender Systems Taxonomy, Knowledge and Information Systems, 2022.

42. E. Daskalaki, C. Panagiotakis, H. Papadakis and P. Fragopoulou, Age recommendations for children’s films: associations between advisories on a US site and parents, Journal of Children and Media, pp. 1-11, 2022. 

43. C. Panagiotakis, S. Markaki, E. Kokinou and H. Papadakis, Coastline Matching via a Graph-based Approach, Computational Geosciences, 2022.

44. S. Markaki and C. Panagiotakis, Jigsaw puzzle solving techniques and applications: a survey, The Visual Computer,  Vol. 39. no. 10, pp. 4405-4421, 2023.

45.  G. Vasiliadis, C. Panagiotakis, I. Stenaki and J. Fanourgiakis, The Impact of Brain-drain in Country Ranking: The case of Computer Science, Scientometrics, Vol. 128, pp. 1441–1450, 2023. 

46. G. Chalkiadakis, I. Ziogas, M. Koutsmanis, E. Streviniotis, C. Panagiotakis and Η. Papadakis, A Novel Hybrid Recommender Algorithm for the Tourism Domain, Algorithms, 2023.

47. H. Papadakis, A. Papagrigoriou, S. Markaki, C. Panagiotakis and P. Fragopoulou, Content-Based Recommender Systems Taxonomy, Foundations of Computing and Decision Sciences, 2023.

48. C. Panagiotakis, Particle Swarm Optimization-Based Unconstrained Polygonal Fitting of 2D Shapes, Algorithms, 17(1), 2024.

Conferences

1. C. Panagiotakis and G. Tziritas, A Speech/Music Discriminator using RMS and Zero-crossings, European Signal Processing Conference, 2002.

2. C. Panagiotakis and G. Tziritas, Recognition and Tracking of the Members of a Moving Human Body, 3rd Intern. Workshop on Articulated Motion and Deformable Objects, 2004.

3. C. Panagiotakis and G. Tziritas, Construction of Animal Models and Motion Synthesis in 3D Virtual Environments using Image Sequences, 2nd Intern. Symposium on 3D Data Processing, Visualization and Transmission, 2004.

4. E. Ramasso, D. Pellerin, C. Panagiotakis, M. Rombaut, G. Tziritas and W. Lim, Spatiotemporal information fusion for human action recognition in videos, European Signal Processing Conference, 2005.

5. C. Panagiotakis, G. Georgakopoulos and G. Tziritas, On the Curve Equipartition Problem: a brief exposition of basic issues, European Workshop on Computational Geometry, 2006.

6. C. Panagiotakis, I. Grinias and G. Tziritas, Automatic Human Motion Analysis and Action Recognition in Athletics Videos, European Signal Processing Conference, 2006.

7. C. Panagiotakis, E. Ramasso, G. Tziritas, D. Pellerin and M. Rombaut, Shape-Motion Based Athlete Tracking for Multilevel Action Recognition, Intern. Conf. on Articulated Motion and Deformable Objects, 2006.  (Sponsor award, certification in pdf)

8. C. Panagiotakis, A. Doulamis and G. Tziritas, Equivalent key frames selection based on iso-content distance and iso-distortion principles, Intern. Workshop on Image Analysis for Multimedia Interactive Services, 2007.

9. E. Kokinou, C. Panagiotakis, F. Vallianatos, Earthquake/Noise Discrimination and estimation of P-S phases based on Wave Characteristics, Bulletin of the Geological Society of Greece, Proceedings of the 11th International Congress, Athens, May, 2007.

10. E. Kokinou, C. Panagiotakis, F. Vallianatos, Seismic phase picking based on wave characteristics, EGU2007-A-08898, Conference: EGU General Assembly (Vienna), 2007.

11. C. Panagiotakis, E. Ramasso, G. Tziritas, D. Pellerin and M. Rombaut, Automatic People Detection and Counting for Athletic Videos Classification,  IEEE Int. Conf. On Advanced Video and Signal based Surveillance, 2007.

12. C. Panagiotakis, I. Grinias and G. Tziritas, MINMAX Video Summarization under Equality Principle, IEEE Intern. Workshop on Multimedia Signal Processing, 2007.

13. C. Panagiotakis, G. Tziritas and A. Papadopoulos, Currency Exchange Rate Segmentation and Modelling, 13th Conference on Macroeconomic Analysis and International Finance, 2009.

14. C. Panagiotakis and G. Tziritas, Signal Segmentation and Modelling based on Equipartition Principle, International Conference on Digital Signal Processing, 2009.

15. C. Panagiotakis and A. Doulamis, Unsupervised Human Members Tracking Based on an Silhouette Detection and Analysis Scheme, workshop on Artificial Intelligence Approaches for Biometric Template Creation and Multibiometrics Fusion (ArtIBio 2009), 2009.

16. V. Tsiaras, C. Panagiotakis and Y. Stylianou, Video and audio based detection of filled hesitation pauses in classroom lectures, European Signal Processing Conference, 2009.

17. C. Panagiotakis, N. Pelekis and I. Kopanakis, Trajectory Voting and Classification based on Spatiotemporal Similarity in Moving Object Databases, 8th International Symposium on Intelligent Data Analysis, 2009.

18. C. Panagiotakis, E. Kokinou and A. Sarris, Archaeological Sites Detection from Geophysical Images Based on Enhancement of Curvilinear Patterns, Annual Conference on Computer Applications and Quantitative Methods in Archaeology (CAA), 2010.

19. E. Kokinou, C. Panagiotakis and A. Sarris, Application of skeletonization on geophysical images, 19th Congress of the Carpathian Balkan Geological Association, 2010.

20. N. Pelekis, I. Kopanakis, C. Panagiotakis, Y. Theodoridis, Unsupervised Trajectory Sampling, European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), 2010.

21. C. Panagiotakis and G. Tziritas, Simultaneous Segmentation and Modelling of Signals based on an Equipartition Principle, 20th International Conference for Pattern Recognition  (ICPR), 2010.

22. C. Panagiotakis, E. Ramasso and G. Tziritas, Lymphocyte Segmentation using the Transferable Belief Model, 20th International Conference for Pattern Recognition  (ICPR), 2010.

23. H. Papadakis, C. Panagiotakis and P. Fragopoulou, Local Community Finding using Synthetic Coordinates, International Conference on Future Information Technology (FutureTech 2011),  2011 (Best Paper Award).

24. A. Kalaitzakis, H. Papadakis, C. Panagiotakis and P. Fragopoulou, Community Detection in Collaborative Environments: A Comparative Analysis, International Conference on PErvasive Technologies Related to Assistive Environments, 2011.

25. H. Papadakis, C. Panagiotakis and P. Fragopoulou, Distributed Community Detection: Finding neighborhoods in a complex world using synthetic coordinates, IEEE symposium on Computers and Communications, 2011.

26. E. Kokinou, C. Panagiotakis and Th. Kinigopoulos, Retrieval of Similar Topographic Areas, Bulletin of the Geological Society of Greece, vol. XLVII 2013 Proceedings of the 13th International Congress, 2013. 

27. H. Papadakis, C. Panagiotakis and P. Fragopoulou, A Distributed Algorithm for Community Detection in Large Graphs, IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, 2013.

28. C. Panagiotakis and P. Fragopoulou, Voting Clustering and Key Points Selection, International Conference on Computer Analysis of Images and Patterns, 2013. 

29. C. Panagiotakis, H. Papadakis, E. Grinias, N. Komodakis, P. Fragopoulou and G. Tziritas, Interactive Image Segmentation via Graph Clustering and Synthetic Coordinates Modeling, International Conference on Computer Analysis of Images and Patterns, 2013. 

30. C. Panagiotakis, N. Ovsepian and E. Michael, Video Synopsis based on a Sequential Distortion Minimization Method, International Conference on Computer Analysis of Images and Patterns, 2013. 

31. C. Panagiotakis, Andre Holzapfel, Damien Michel, and Antonis Argyros, Beat Synchronous Dance Animation based on Periodic Motion and Music Tempo Analysis, International Symposium on Visual Computing, 2013.

32. C. Panagiotakis, H. Papadakis and P. Fragopoulou, FlowPro: A Flow Propagation Method for Single Community Detection, IEEE Consumer Communications and Networking Conference, 2014.

33. C. Panagiotakis and E. Kokinou, Automatic enhancement and detection of activesea faults from bathymetry, International Conference on Pattern Recognition, 2014.

34. C. Panagiotakis, Damien Michel, and Antonis Argyros, Temporal segmentation and seamless stitching of motion patterns for synthesizing novel animations of periodic dances, International Conference on Pattern Recognition, 2014.

35. C. Panagiotakis, H. Papadakis and P. Fragopoulou, CoViFlowPro: A Community Visualization method based on a Flow Propagation Algorithm,  International Conference on Bio-inspired Information and Communications Technologies (formerly BIONETICS) - BICT 2014, 2014.

36. C. Panagiotakis, H. Papadakis, and P. Fragopoulou, Local Community Detection via Flow Propagation, International conference on Advances in Social Network Analysis and Mining (ASONAM), 2015.  

37. H. Papadakis, C. Panagiotakis and P. Fragopoulou, Synthetic Coordinate-based Community Detection on Dynamic Graphs, International Conference on Social Computing (SocialCom), 2015.  

38. N. Pelekis, P. Tampakis, M. Vodas, C. Panagiotakis and Y. Theodoridis, In-DBMS Sampling-based Sub-trajectory, International Conference on Extending Database Technology (EDBT), 2017.

39. K. Papoutsakis, C. Panagiotakis and A.A. Argyros, Temporal Action Co-Segmentation in 3D Motion Capture Data and Videos, In IEEE Computer Vision and Pattern Recognition (CVPR 2017), IEEE, Honolulu, Hawaii, USA, July 2017. 

40. Papadakis, H., Michalakis, N., Fragopoulou, P., Panagiotakis, C., & Malamos, A. Movie SCoRe: Personalized Movie Recommendation on Mobile Devices. In Proceedings of the 21st Pan-Hellenic Conference on Informatics (p. 46), ACM, 2017.

41. C. Panagiotakis, G. Karvounas, and A. Argyros, Unsupervised Detection of Periodic Segments in Videos, IEEE International Conference on Image Processing, 2018.

42. C. Panagiotakis and A. Argyros, Cell Segmentation via Region-based Ellipse Fitting, IEEE International Conference on Image Processing, 2018.

43. C. Panagiotakis, H. Papadakis and P. Fragopoulou, Detection of Hurriedly Created Abnormal Profiles in Recommender Systems,  International Conference on Intelligent Systems, 2018.  

 44. H. Papadakis, N. Michalakis, P. Fragopoulou and C. Panagiotakis, A Mobile Application for Personalized Movie Recommendations with Dynamic Updates, International Conference on Intelligent Systems, 2018.  

45. C. Panagiotakis and A. Argyros, A two-stage approach for commonality-based temporal localization of periodic motions, International Conference on Computer Vision Systems, 2019.

46. C. Panagiotakis, H. Papadakis and P. Fragopoulou, Personalized Video Summarization based exclusively on User Preferences, European Conference on Information Retrieval, 2020. 

47. C. Panagiotakis, H. Papadakis and P. Fragopoulou, A User Training Error based Correction Approach combined with the Synthetic Coordinate Recommender System, 28th Conference on User Modeling, Adaptation and Personalization, 2020. 

48. E. Daskalaki, C. Panagiotakis, H. Papadakis and P. Fragopoulou, Surveying Parental Mediation and Digital Literacy. Were Parents Ready during Covid-19?, 20th International Conference on e-society, 2022. 

49. C. Panagiotakis, E. Daskalaki, H. Papadakis and P. Fragopoulou, The tourist trip design problem with POI categories via an Expectation-Maximization based method, Workshop on Recommenders in Tourism, 2022.

50. C. Panagiotakis and H. Papadakis, Session-Based Recommendation by combining Probabilistic Models and LSTM, RecSysChallenge'22: Proceedings of the Recommender Systems Challenge, 2022.

51. C. Panagiotakis, E. Daskalaki, H. Papadakis and P. Fragopoulou, Personalized Itinerary Recommendation via Expectation-Maximization, IEEE 17th International Conference on Computer Science and Information Technologies, 2022.

52. S. Markaki, C. Panagiotakis, Unsupervised Tree Detection and Counting via Region-based Circle Fitting, International Conference on Pattern Recognition Applications and Methods (ICPRAM), 2023.

Technical reports (in Greek)

1. C. Panagiotakis and G. Tziritas, A Speech/Music discriminator based on RMS and zero-crossings, Computer Science Department, CSD-TR-00-02, 2000.

2. C. Panagiotakis and G. Tziritas, Human Tracking in video sequences, Computer Science Department, CSD-TR-03-01, 2003.

3. C. Panagiotakis, G. Georgakopoulos and G. Tziritas, Curve Segmentation into Equal Segments, Computer Science Department, CSD-TR-05-02, 2005.

4. N. Pelekis, C. Panagiotakis,  M. Vodas, P. Tampakis, Y. Theodoridis, Sampling-based Sub-Trajectory Clustering, UNIPI-InfoLab-TR-2013-02, Technical Report Series, U. Piraeus, 2013.