Research
Machine Learning, Computer Vision, Signal Processing, neuro-physiological signals, Sensing
Interests
My research is in the area of ‘’Looking at /Sensing People’’, using Machine Learning, Computer Vision and Signal Processing methodologies to interpret and predict actions, behaviour, emotions and cognitive states of people by analysing their images, video and neuro-physiological signals. This includes detection, tracking and recognition of facial and body gestures in unconstrained environments. I have more than 200 publications in the most selective Journals and conferences in the field of Computer Vision, an h-index of 33, and more than 5000 citations. I am associate editor in the journals of Pattern Recognition, Computer Vision and Image Understanding, and Image and Vision Computing, and area chair or in the programme committee of all the major conferences in the field. My research has been funded by the EPSRC, EU FP7 and direct bilateral collaborations with research institutes and the industry.
Publications

Publications of specific relevance to Applied Data Science
2019

Bishay M, PALASEK P, PRIEBE S and
Patras I (2019).
SchiNet: Automatic Estimation of Symptoms of Schizophrenia from Facial Behaviour Analysis. Ieee Transactions On Affective Computing 10.1109/TAFFC.2019.2907628
Kordopatis-Zilos G, Papadopoulos S,
Patras I and Kompatsiaris I (2019).
FIVR: Fine-grained Incident Video Retrieval. Institute of Electrical and Electronics Engineers Ieee Transactions On Multimedia vol. 21, (10) 2638-2652.
10.1109/TMM.2019.29057412018

Miranda Correa JA, Abadi MK, Sebe N and
Patras I (2018).
AMIGOS: A Dataset for Affect, Personality and Mood Research on Individuals and Groups. Ieee Transactions On Affective Computing 10.1109/TAFFC.2018.2884461
Mou W, Tzelepis C, Mezaris V, Gunes H and
Patras I (2018).
A deep generic to specific recognition model for group membership analysis using non-verbal cues. Image and Vision Computing 10.1016/j.imavis.2018.09.005
Markatopoulou F, Mezaris V and
Patras I (2018).
Implicit and Explicit Concept Relations in Deep Neural Networks for Multi-Label Video/Image Annotation. Ieee Transactions On Circuits and Systems For Video Technology 10.1109/TCSVT.2018.2848458
Palasek P and
Patras I (2018).
Semi-supervised Fisher vector network. Corr vol. abs/1801.04438,
2017

TZELEPIS C,
PATRAS and MEZARIS V (2017).
Linear Maximum Margin Classifier for Learning from Uncertain Data. Institute of Electrical and Electronics Engineers Ieee Transactions On Pattern Analysis and Machine Intelligence 10.1109/TPAMI.2017.2772235
Vrochidis S,
Patras I and Kompatsiaris I (2017).
Gaze movement-driven random forests for query clustering in automatic video annotation. Multimedia Tools and Applications vol. 76, (2) 2861-2889.
10.1007/s11042-015-3221-1
Palasek P and
Patras I (2017).
Discriminative convolutional Fisher vector network for action recognition. Corr vol. abs/1707.06119,
2016

Wang L,
Patras I, Zhang J, Mori G and Davis L (2016).
Special Issue on Individual and Group Activities in Video Event Analysis. Computer Vision and Image Understanding vol. 144, 1-2.
10.1016/j.cviu.2016.01.008
Tzelepis C, Galanopoulos D, Mezaris V and
Patras I (2016).
Learning to detect video events from zero or very few video examples. Image Vis. Comput. vol. 53, 35-44.
2015

Tzelepis C, Galanopoulos D, Mezaris V and
Patras I (2015).
Learning to detect video events from zero or very few video examples. Image and Vision Computing vol. 53, 35-44.
10.1016/j.imavis.2015.09.005
Yang H, Jia X,
Patras I and Chan KP (2015).
Random Subspace Supervised Descent Method for Regression Problems in Computer Vision. Ieee Signal Processing Letters vol. 22, (10) 1816-1820.
10.1109/LSP.2015.2437883
Yang H and
Patras I (2015).
Privileged Information-Based Conditional Structured Output Regression Forest for Facial Point Detection. Ieee Transactions On Circuits and Systems For Video Technology vol. 25, (9) 1507-1520.
10.1109/TCSVT.2015.2389492
Yang H, He X, Jia X and
Patras I (2015).
Robust face alignment under occlusion via regional predictive power estimation. Ieee Transactions On Image Processing vol. 24, (8) 2393-2403.
10.1109/TIP.2015.2421438
Abadi MK, Subramanian R, Kia SM, Avesani P,
Patras I and Sebe N (2015).
DECAF: MEG-Based Multimodal Database for Decoding Affective Physiological Responses. Ieee Transactions On Affective Computing vol. 6, (3) 209-222.
10.1109/TAFFC.2015.2392932
Yang H and
Patras I (2015).
Fine-tuning regression forests votes for object alignment in the wild. Ieee Transactions On Image Processing vol. 24, (2) 619-631.
10.1109/TIP.2014.2383325
Markatopoulou F, Mezaris V, Pittaras N and
Patras I (2015).
Local Features and a Two-Layer Stacking Architecture for Semantic Concept Detection in Video. Ieee Transactions On Emerging Topics in Computing vol. 3, (2) 193-204.
10.1109/TETC.2015.2418714
Yang H and
Patras I (2015).
Mirror, mirror on the wall, tell me, is the error small? Corr vol. abs/1501.05152,
Patras I (2015).
Face Pose Analysis. Encyclopedia of Biometrics , Editors: Li SZ and Jain AK.
Springer Us 2014

Yang H, Zou C and
Patras I (2014).
Face sketch landmarks localization in the wild. Ieee Signal Processing Letters vol. 21, (11) 1321-1325.
10.1109/LSP.2014.23335442013

Rudovic O, Pantic M and
Patras IY (2013).
Coupled Gaussian Processes for Pose-Invariant Facial Expression Recognition. Ieee Transactions On Pattern Analysis and Machine Intelligence vol. 35, (6) 1357-1369.
10.1109/TPAMI.2012.233
Yang H and
Patras I (2013).
Sieving regression forest votes for facial feature detection in the wild. Proceedings of The Ieee International Conference On Computer Vision 1936-1943.
10.1109/ICCV.2013.2432012

Chatzilari E, Nikolopoulos S,
Patras I and Kompatsiaris I (2012).
Leveraging social media for scalable object detection. Pattern Recognition vol. 45, (8) 2962-2979.
10.1016/j.patcog.2012.02.006
Oveisi F, Oveisi S, Efranian A and
Patras I (2012).
Tree-Structured Feature Extraction Using Mutual Information. Ieee Transactions On Neural Networks and Learning Systems vol. 23, (1) 127-137.
10.1109/TNNLS.2011.2178447
Koelstra S, Muhl C, Soleymani M, Lee J-S, Yazdani A, Ebrahimi T, Pun T, Nijholt A and
Patras IY (2012).
DEAP: A Database for Emotion Analysis Using Physiological Signals. Ieee Transactions On Affective Computing vol. 3, (1) 18-31.
10.1109/T-AFFC.2011.152011

Nikolopoulos S, Papadopoulos GT, Kompatsiaris I and
Patras I (2011).
Evidence-driven image interpretation by combining implicit and explicit knowledge in a Bayesian network. Ieee Trans Syst Man Cybern B Cybern vol. 41, (5) 1366-1381.
10.1109/TSMCB.2011.2147781
Vrochidis S, Kompatsiaris I and
Patras I (2011).
Utilizing implicit user feedback to improve interactive video retrieval. Advances in Multimedia vol. 2011,
10.1155/2011/310762
Oikonomopoulos A,
Patras I and Pantic M (2011).
Spatiotemporal localization and categorization of human actions in unsegmented image sequences. Ieee Transactions On Image Processing vol. 20, (4) 1126-1140.
10.1109/TIP.2010.2076821
Nikolopoulos S, Giannakidou E, Kompatsiaris I,
Patras I and Vakali A (2011).
Combining Multi-modal Features for Social Media Analysis. Social Media Modeling and Computing , Editors: Hoi SCH, Luo J, Boll S, Xu D and Jin R.
Springer 2010

Koelstra S, Pantic M and
Patras I (2010).
A Dynamic Texture-Based Approach to Recognition of Facial Actions and Their Temporal Models. Ieee Transactions On Pattern Analysis and Machine Intelligence vol. 32, (11) 1940-1954.
10.1109/TPAMI.2010.50
Passino G,
Patras I and Izquierdo E (2010).
Aspect coherence for graph-based semantic image labelling. Ieee Computer Vision, Iet vol. 4, 183-194.
10.1049/iet-cvi.2008.0093
Patras I and Hancock ER (2010).
Coupled Prediction Classification for Robust Visual Tracking. Ieee Transactions On Pattern Analysis and Machine Intelligence vol. 32, (9) 1553-1567.
10.1109/TPAMI.2009.175
Koelstra S, Pantic M and
Patras I (2010).
A Dynamic Texture-Based Approach to Recognition of Facial Actions and Their Temporal Models. Ieee Computer Society Ieee Transactions On Pattern Analysis and Machine Intelligence vol. 32, 1940-1954-1940-1954.
10.1109/TPAMI.2010.502009

Oikonomopoulos A, Pantic M and
Patras I (2009).
Sparse B-spline polynomial descriptors for human activity recognition. Image Vision Comput vol. 27, (12) 1814-1825.
10.1016/j.imavis.2009.05.010
Patras I (2009).
Face Pose Analysis. Encyclopedia of Biometrics , Editors: Li SZ and Jain AK.
Springer Us 2008

Andreopoulos Y and
Patras I (2008).
Incremental refinement of image salient-point detection. Ieee Transactions On Image Processing vol. 17, (9) 1685-1699.
10.1109/TIP.2008.20010512007
PATRAS I, Lagendijk RL and Hendriks EA (2007).
Bayesian Confidence Measures for Block-based Motion Estimation. Ieee Trans. Circuits and Systems For Video Technology vol. 17 Issue 8, 988-995.
Patras I, Hendriks EA and Lagendijk RL (2007).
Probabilistic confidence measures for block matching motion estimation. Ieee T Circ Syst Vid vol. 17, (8) 988-995.
10.1109/TCSVT.2007.903121
PATRAS I, Paragios N, Oikonomopoulos A and Pantic M (2007).
Particle Filtering Tracking Scheme for Trajectory-based Recognition of Human Actions. Artificial Intelligence For Human Computing , Editors: Huang TS, Nijholt A, Pantic M and Pentland A.
Springer 2006

Oikonomopoulos A,
Patras I and Pantic M (2006).
Spatiotemporal salient points for visual recognition of human actions. Ieee Trans Syst Man Cybern B Cybern vol. 36, (3) 710-719.
10.1109/tsmcb.2005.861864
Pantic M and
Patras I (2006).
Dynamics of facial expression: recognition of facial actions and their temporal segments from face profile image sequences. Ieee Trans Syst Man Cybern B Cybern vol. 36, (2) 433-449.
10.1109/tsmcb.2005.859075
Diplaros A, Gevers T and
Patras I (2006).
Combining color and shape information for illumination-viewpoint invariant object recognition. Ieee Trans Image Process vol. 15, (1) 1-11.
10.1109/tip.2005.8603202004
Patras I, Worring M and van den Boomgaard R (2004).
Dense motion estimation using regularization constraints on local parametric models. Ieee Trans Image Process vol. 13, (11) 1432-1443.
10.1109/tip.2004.8361792003
Patras I, Hendriks EA and Lagendijk RL (2003).
Semi-automatic object-based video segmentation with labeling of color segments. Signal Process-Image vol. 18, (1) 51-65.
10.1016/S0923-5965(02)00092-92001
Patras I, Hendriks EA and Lagendijk RL (2001).
Video segmentation by MAP labeling of watershed segments. Ieee T Pattern Anal vol. 23, (3) 326-332.
10.1109/34.910886
PATRAS I, Hendriks EA, Broekhoven M and Hupkens T (2001).
Robust Region Merging for Motion Based Sementation Using the Kolmogorov-Smirnov Test. Image Processing and Communications vol. 6, (3-4) 27-34.