| Issue Date | Title | Author(s) |
| Jun-2000 | Enhancing Nonverbal Human Computer Interaction with Expression Recognition | Karpouzis, Kostas ; Tsapatsoulis, Nicolas ; Raouzaiou, Amaryllis ; Moshovitis, George ; Kollias, Stefanos D. |
| 2005 | Enhancing the robustness of skin-based face detection schemes through a visual attention architecture | Tsapatsoulis, Nicolas ; Rapantzikos, Konstantinos |
| Sep-2016 | Estimating party-user similarity in Voting Advice Applications using Hidden Markov Models | Agathokleous, Marilena ; Tsapatsoulis, Nicolas ; Djouvas, Constantinos |
| 2011 | Evaluating annotators consistency with the aid of an innovative database schema | Georgiou, Olga ; Tsapatsoulis, Nicolas ; Theodosiou, Zenonas |
| Dec-2016 | Evaluating the descriptive power of Instagram hashtags | Giannoulakis, Stamatios ; Tsapatsoulis, Nicolas |
| 4-Jul-2023 | Evaluating the use of Instagram images color histograms and hashtags sets for automatic image annotation | Giannoulakis, Stamatios ; Tsapatsoulis, Nicolas ; Djouvas, Constantinos |
| 2009 | Experimental evaluation of the MPEG-7 visual descriptors for object classification | Tsapatsoulis, Nicolas ; Theodosiou, Zenonas |
| 2000 | Exploring the time course of facial expressions with a fuzzy system | Tsapatsoulis, Nicolas ; Piat, Frederic |
| 2012 | Extraction of web image information: semantic or visual cues? | Tsapatsoulis, Nicolas ; Tryfou, Georgina |
| 2000 | Face detection in color images and video sequences | Tsapatsoulis, Nicolas ; Kollias, Stefanos D. |
| 1998 | Face extraction from non-uniform background and recognition in compressed domain | Tsapatsoulis, Nicolas ; Doulamis, Nikolaos D. ; Doulamis, Anastasios D. ; Kollias, Stefanos D. |
| 1999 | Face recognition based on multiple representations: splitting the error space | Leonidou, Miltiades ; Tsapatsoulis, Nicolas ; Kollias, Stefanos D. |
| Sep-2021 | Face Verification in Practice: The Case of Greek Artist Leonidas Arniotis | Tsapatsoulis, Nicolas ; Diakoumopoulou, Katerina |
| 2005 | Facial expression and gesture analysis for emotionally-rich man-machine interaction | Karpouzis, Kostas ; Raouzaiou, Amaryllis ; Drosopoulos, Athanasios ; Ioannou, Spiros ; Balomenos, Themis ; Tsapatsoulis, Nicolas ; Kollias, Stefanos D. |
| 2004 | Facial expression classification based on MPEG-4 FAPs: the use of evidence and prior knowledge for uncertainty removal | Wallace, Manolis ; Raouzaiou, Amaryllis ; Tsapatsoulis, Nicolas ; Kollias, Stefanos D. |
| 1998 | Facial Expression Recognition Using HMM with Observation Dependent Transition Matrix | Tsapatsoulis, Nicolas ; Leonidou, Miltiades ; Kollias, Stefanos D. |
| Jun-2001 | Facial Image Indexing in Multimedia Databases | Tsapatsoulis, Nicolas ; Avrithis, Yannis ; Kollias, Stefanos D. |
| Jul-2017 | Feature extraction for tweet classification: do the humans perform better? | Tsapatsoulis, Nicolas ; Djouvas, Constantinos |
| 2015 | FG2015 age progression evaluation | Tsapatsoulis, Nicolas ; Soteriou, Kleanthis ; Kuwahara, Daiki ; Morishima, Shigeo ; Lanitis, Andreas |
| Jun-2019 | Filtering Instagram Hashtags through crowdtagging and the HITS algorithm | Giannoulakis, Stamatios ; Tsapatsoulis, Nicolas |