Selected Publications

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S. P. Chatzis, Kosmopoulos, D., and Varvarigou, T. A., “Robust Sequential Data Modeling Using an Outlier Tolerant Hidden Markov Model”, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 31, no. 9, pp. 1657-1669, 2009.PDF icon ieee-t-pami09.pdf (495.17 KB)
S. P. Chatzis, Kosmopoulos, D., and Varvarigou, T. A., “Signal Modeling and Classification Using a Robust Latent Space Model Based on t Distributions”, Signal Processing, IEEE Transactions on, vol. 56, pp. 949 -963, 2008.PDF icon ieee-t-sp07.pdf (219.44 KB)
S. P. Chatzis and Kosmopoulos, D., “Visual Workflow Recognition Using a Variational Bayesian Treatment of Multistream Fused Hidden Markov Models”, Circuits and Systems for Video Technology, IEEE Transactions on, vol. 22, no. 7, pp. 1076 -1086, 2012.PDF icon ieee-t-csvt12.pdf (705.09 KB)
S. P. Chatzis, Kosmopoulos, D., and Varvarigou, T. A., “A robust approach towards sequential data modeling and its application in automatic gesture recognition”, Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on. pp. 1937-1940, 2008.PDF icon icassp-08.pdf (64 KB)
S. P. Chatzis and Kosmopoulos, D., “A variational Bayesian methodology for hidden Markov models utilizing Student's-t mixtures”, Pattern Recognition, vol. 44, no. 2, pp. 295 - 306, 2011.PDF icon pat-rec-10.pdf (919.11 KB)
S. P. Chatzis, Kosmopoulos, D., and Doliotis, P., “A Conditional Random Field-Based Model for Joint Sequence Segmentation and Classification”, Pattern Recognition, vol. 46, no. 6, pp. 1569-1578, 2013.PDF icon pat_rec12.pdf (8.04 MB)
S. P. Chatzis and Kosmopoulos, D. I., “A Non-Stationary Infinite Partially Observable Markov Decision Process”, International Conference on Artificial Neural Networks. 2014.PDF icon pomdp.pdf (110.83 KB)
S. P. Chatzis and Kosmopoulos, D. I., “A Nonparametric Bayesian Approach Toward Stacked Convolutional Independent Component Analysis”, International Conference on Computer Vision. 2015.PDF icon iccv2015.pdf (352.41 KB)