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Rothkrantz LJ, Lefter I. Dynamic indoor localization and awareness using sensor networks. Ruse; 2013.
Lefter I, Rothkrantz LJ, Burghouts G. A Comparative Study on Automatic Audio-Visual Fusion for Aggression Detection Using Meta-Information. Pattern Recognition Letters. 2013.
Lefter I, Burghouts G, Rothkrantz LJ. Learning the Fusion of Audio and Video Aggression Assessment by Meta-Information from Human Annotations. In: FUSION 2012.; 2012.
Lefter I, Burghouts G, Rothkrantz LJ. Automatic Audio-Visual Fusion for Aggression Detection using Meta-Information. In: 9th IEEE International Conference on Advanced Video and Sensor based surveillance.; 2012.
Lefter I, Rothkrantz LJ, Burghouts G. Aggression detection in speech using sensor and semantic information. Vol 7499. Sojka P, Horak A, Kopecek I, Pala K, editors. Brno, Czech Republic: Springer; 2012. (Lecture Notes in Artificial Intelligence; vol 7499).
Lefter I, Rothkrantz LJ, Somhorst M. Automated safety control by video cameras. Rachev B, Smirkarov A, editors. Ruse Bulgarian: ACM PRESS; 2012. (ACM IPS).
Hameete P, Leysen S, van der Laan T, Lefter I, Rothkrantz LJ. Intelligent Multi-Camera Video Surveillance. International Journal on Information Technologies and Security (IJITS) . 2012;4:51-62.
Lefter I, Rothkrantz LJ, Burghouts G, Yang C-, Wiggers P. Addressing Multimodality in Overt Aggression Detection. Vol 6836. Matousek V, Habernal I, editors. Pilsen: Springer Verlag; 2011. (lecture Notes in Artificial Intelligence ; vol 6836). Abstract  Download: tsd.pdf (1.14 MB)
Rothkrantz LJ, Lefter I. Risk analysis of a video-surveillance system. Vol 578. Rachev B, Smirkarov A, editors. Vienna: ACM Press; 2011. (ACM Conference Proceedings Series; vol 578). Abstract
Lefter I, Rothkrantz LJ, van Leeuwen DA, Wiggers P. Automatic Stress Detection in Emergency (Telephone) Calls. Int. J. of Intelligent Defence Support Systems. 2011;4(2). Abstract