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Janez Perš
Assistant Professor

Faculty of Electrical Engineering
University of Ljubljana
Trzaska 25
SI-1000 Ljubljana
Slovenia

E-mail: janez.pers@fe.uni-lj.si
Tel: ++386 1 4768 876
Fax: ++386 1 4768 279

Degrees:

1998: B.Sc. in Electrical Engineering, University of Ljubljana
2001: M.Sc. in Electrical Engineering, University of Ljubljana
2004: Ph.D. in Electrical Engineering, University of Ljubljana

Research interests:

Human motion analysis, motion-based biometry, far-infrared imaging, distributed visual sensors


Teaching:

Komunikacije v avtomatiki (vaje)
Računalniški vid (vaje)
Strojni vid - doktorski študij

Selected Publications:

  • Vildana Sulić Kenk, Rok Mandeljc, Stanislav Kovačič, Matej Kristan, Melita Hajdinjak, Janez Perš. "Visual re-identification across large, distributed camera networks". Image and Vision Computing, 34(0): 11-26, February 2015.
   
  • Matej Kristan, Vildana Sulic, Stanislav Kovacic, and Janez Perš . "Fast image-based obstacle detection from unmanned surface vehicles". IEEE Transactions on Cybernetics (accepted), 2015.
  
  • Rok Mandeljc, Stanislav Kovačič, Matej Kristan, Janez Perš. "Tracking by Identification Using Computer Vision and Radio". Sensors, 13(1): 241-273, 2013.
  
  • Boštjan Murovec, Janez Perš, Rok Mandeljc, Vildana Sulić Kenk, Stanislav Kovačič. "Towards commoditized smart-camera design". Journal of Systems Architecture, 59(10): 847-858, 2013.
   
  • Vildana Sulić Kenk, Janez Perš, Matej Kristan, Stanislav Kovačič. "Efficient Feature Distribution in Visual-Sensor Networks - An Example". Technical report FE-LSV-01/12, University of Ljubljana, Faculty of Electrical Engineering, December 2012.
  
  • Rok Mandeljc, Stanislav Kovačič, Matej Kristan, Janez Perš."Non-sequential Multi-view Detection, Localization and Identification of People Using Multi-modal Feature Maps". In: Proceedings of the 11th Asian Conference on Computer Vision (ACCV2012), pp.1-14. November 2012.
   
  • Janez Perš, Vildana Sulić Kenk, Rok Mandeljc, Matej Kristan and Stanislav Kovačič."Dana36: A Multi-Camera Image Dataset for Object Identification in Surveillance Scenarios". In: 9th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS'12), pp.64 - 69. September 2012.
  
  • Rok Mandeljc, Janez Perš, Matej Kristan, Stanislav Kovačič."Fusion of non-visual modalities into the probabilistic occupancy map framework for person localization". In: Proceedings of the 5th ACM/IEEE International Conference on Distributed Smart Cameras (ICDSC2011), pp.1-3. Association for Computer Machinery (ACM)/Institute of Electrical and Electronics Engineers (IEEE), August 2011.
   
  • Rok Mandeljc, Janez Perš, Matej Kristan, Stanislav Kovačič."Multi-camera and radio fusion for person localization in a cluttered environment". In: Heinz Mayer, Martina Uray, Harald Ganster (eds.), Proceedings of the 35th Workshop of the Austrian Association for Pattern Recognition (ÖAGM/AAPR), pp.1-8. May 2011.
   
  • Vildana Sulić, Janez Perš, Matej Kristan, Stanislav Kovačič. "Efficient Feature Distribution for Object Matching in Visual-Sensor Networks". IEEE Transactions on Circuits and Systems for Video Technology, 21(7): 903-916, 2011.
   
  • Matej Kristan, Stanislav Kovacic, Ales Leonardis, Janez Pers. "A Two-Stage Dynamic Model for Visual Tracking". Systems, Man, and Cybernetics: Part B, 40(6): 1505-1520, December 2010.
   
  • Janez Perš, Vildana Sulić, Matej Kristan, Matej Perše, Klemen Polanec, Stanislav Kovačič. "Histograms of Optical Flow for Efficient Representation of Body Motion". Pattern Recognition Letters, 31(11): 1369-1376, August 2010.
   
  • Andreja Jarc, Janez Pers, Stanislav Kovacic. "A multi-stage registration method using texture features". Journal of Digital Imaging, 23(3): 287-300, June 2010.
   
  • Goran Vučković, Janez Perš, Nic James, Mike Hughes. "Measurement Error Associated With the SAGIT/Squash Computer Tracking Software.". European journal of sport science, 10(2): 129-140, March 2010.
  
  • Matej Perše, Matej Kristan, Janez Perš, Gašper Mušič, Goran Vučkovič and Stanislav Kovačič. "Analysis of multi-agent activity using petri nets". Pattern Recognition: in press, November 2009.
  
  • Goran Vuckovic, Janez Pers, Nic James and Mike Hughes. "Tactical use of the T area in squash by players of differing standard". Journal of Sports Sciences, 27(8): 863–871, June 2009.
  
  • Andreja Jarc, Janez Perš, Peter Rogelj, Stanislav Kovačič. "Efficient sampling for the evaluation protocol for 2-D rigid registration". Informacije MIDEM, 39(1): 33-40, March 2009.
   
  • Matej Perše, Matej Kristan, Stanislav Kovačič, Goran Vučkovič and Janez Perš. "A Trajectory-Based Analysis of Coordinated Team Activity in a Basketball Game". Computer Vision and Image Understanding, (113): 612-621, March 2009.
   
  • M. Kristan, J. Perš, S. Kovačič. A. Leonardis. "A Local-motion-based probabilistic model for visual tracking". Pattern Recognition, Accepted, 2009.
   
  • Vildana Sulic, Janez Pers, Matej Kristan, Stanislav Kovacic. "Efficient Feature Distribution in Visual Sensor Networks". Technical report LSV-01/09, Faculty of Electrical Engineering, University of Ljubljana, 2009.
  
  • Kristan, M. and Perš, J. and Perše, M. and Kovačič S.. "Closed-world tracking of multiple interacting targets for indoor-sports applications". Computer Vision and Image Understanding, 113(5): 598-611, 2009.
   
  • Vildana Sulić, Janez Perš, Matej Kristan, Stanislav Kovačič. "Hierarchical Feature Scheme for Object Recognition in Visual Sensor Networks". Elektroteh. vestn., 76(1/2): 38-44, 2009.
  
  • Matej Perše, Matej Kristan, Janez Perš, Stanislav Kovačič."Recognition of Multi-Agent Activities with Petri Nets". In: Proceedings of the 17th International Electrotechnical and Computer Science Conference, ERK 2008, Portorož, Slovenia, September 2008.
  
  • Vildana Sulić, Janez Perš, Matej Kristan, Andreja Jarc, Matej Perše, Stanislav Kovačič."Izvedba algoritma računalniškega vida na omrežni kameri". In: Božidar Potočnik (ed.), ROSUS 2008: Računalniška obdelava slik in njena uporaba v Sloveniji, zbornik strokovne konference, pp.35-40. March 2008.
  
  • Janez Pers, Matej Kristan, Matej Perse, Stanislav Kovacic."Analysis of Player Motion in Sport Matches". In: Arnold Baca , Martin Lames, Keith Lyons, Bernhard Nebel, Josef Wiemeyer (eds.), Computer Science in Sport - Mission and Methods, (Dagstuhl Seminar Proceedings, no.08372), Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany, 2008.
   
  • M. Perše, M. Kristan, J. Perš, G. Vučkovič, S. Kovačič."Temporal Segmentation of Group Motion using Gaussian Mixture Models". In: Computer Vision Winter Workshop, pp.47-54. 2008.
  
  • Frane Erčulj, Brane Dežman, Goran Vučković, Janez Perš, Matej Perše, Matej Kristan. "An Analysis Of Basketball Players' Movements In The Slovenian Basketball League Play-Offs Using The Sagit Tracking System". Facta Universitatis, Series: Physical Education and Sport, 6(1): 75 - 84, 2008.
   
  • M. Kristan, J. Pers, A. Leonardis, S. Kovacic."A hierarchical dynamic model for tracking in sports". In: Proceedings of the 16th Electrotechnical and Computer Science Conference ERK, pp.187-190. September 2007.
  
  • M. Kristan, M. Perše, S. Kovačič, J. Perš. "Sledenje več igralcev v športnih igrah na podlagi vizualne informacije". Electrotechnical Review, 74(1-2): 19-24, May 2007.
  
  • Janez Perš, Peter Rogelj, Klemen Polanec, Viktor Zaletelj, Stanislav Kovačič."Prilagodljiv merilni sistem na podlagi profila globine". In: Božidar Potočnik (ed.), ROSUS 2007: Računalniška obdelava slik in njena uporaba v Sloveniji, zbornik strokovne konference, pp.75-81. March 2007.
  
  • Andreja Jarc, Janez Perš, Peter Rogelj, Matej Perše."Texture features for affine registration of thermal (FLIR) and visible images". In: Michael Grabner and Helmut Grabner (ed.), Proceedings of the 12th Computer Vision Winter Workshop, Institute for Computer Graphics and Vision, Graz University of Technology, February 2007.
   
  • M. Perše, M. Kristan, J. Perš, S. Kovačič."Automatic Evaluation of Organized Basketball Activity". In: Michael Grabner, Helmut Grabner (eds.), Computer Vision Winter Workshop 2007, St. Lambrecht, Austria, pp.11-18. February 2007.
  
  • M. Kristan, J. Perš, M. Perše, S. Kovačič. "A Bayes-Spectral-Entropy-Based Measure of Camera Focus Using a Discrete Cosine Transform (see Matlab Code)". Pattern Recognition Letters, 27(13): 1419-1580, October 2006.
   
  • M. Kristan, J. Perš, M Perše, S. Kovačič."Towards fast and efficient methods for tracking players in sports". In: Proceedings of the ECCV Workshop on Computer Vision Based Analysis in Sport Environments, pp.14-25. May 2006.
  
  • M. Perše, M. Kristan, J. Perš, S. Kovačič."A Template-Based Multi-Player Action Recognition of the Basketball Game". In: Janez Pers, Derek R. Magee (eds.), Proceedings of the ECCV Workshop on Computer Vision Based Analysis in Sport Environments, Graz, Austria, pp.71-82. May 2006.
  
  • Janez Perš, Matej Kristan, Matej Perše, Marta Bon, Goran Vučkovič, Stanislav Kovačič."Analiza gibanja igralca med tekmami". In: Božidar Potočnik (ed.), ROSUS 2006: Računalniška obdelava slik in njena uporaba v Sloveniji, zbornik strokovne konference, pp.97-103. March 2006.
  
  • G. Vuckovic, J. Pers, S. Kovacic."Motion Analysis of the International and National Rank Squash Players". In: 4th International Symposium on Image and Signal Processing and Analysis ISPA 2005, Zagreb, Croatia, pp.334-338. September 2005.
  
  • M. Perše, M. Kristan, J. Perš, S. Kovačič."Avtomatsko zaznavanje osnovnih elementov košarkarske igre na podlagi trajektorij igralcev". In: Zbornik štirinajste mednarodne Elektrotehniške in računalniške konference ERK 2005, Portorož, Slovenija, pp.191- 194. September 2005.
  
  • M. Kristan, J. Perš, M. Perše, M. Bon, S. Kovačič."Multiple interacting targets tracking with application to team sports". In: 4th International Symposium on Image and Signal Processing and Analysis ISPA, (Awarded best student paper award), pp.322-327. September 2005.
  
  • M. Perše, J. Perš, M. Kristan, G. Vučkovič, S. Kovačič."Physics-Based Modelling of Human Motion using Kalman Filter and Collision Avoidance Algorithm". (4th International Symposium on Image and Signal Processing and Analysis ISPA), pp.328-333. September 2005.
  
  • J. Pers, G. Vuckovic, S. Kovacic."Analysis and pattern detection on large amounts of annotated sport motion data". In: 4th International Symposium on Image and Signal Processing and Analysis ISPA 2005, Zagreb, Croatia, pp.339-344. September 2005.
  
  • M. Kristan, J. Perš, M. Perše, S. Kovačič."Bayes Spectral Entropy-Based Measure of Camera Focus". In: 10th Computer Vision Winter Workshop, pp.155-164. February 2005.
  
  • J. Perš, M. Kristan, M. Perše, S. Kovačič."Observing Human Motion Using Far-Infrared (FLIR) Camera -- Some Preliminary Studies". In: Thirteenth International Electrotechnical and Computer Science Conference ERK 2004, Portorož, Slovenia, September 27-29, pp.187-190. 2004.
  
  • M. Jug, J. Perš, B. Dežman, S. Kovačič."Trajectory based assessment of coordinated human activity". In: Computer Vision Systems, Proceedings of Third International Conference ICVS 2003, Graz, Austria, (Lecture Notes in Computer Science, vol.2626), pp.534-543. Springer, April 2003.
   
  • J. Perš, G. Vučkovič, B. Dežman, S. Kovačič."Human activities at different levels of detail". In: O. Drbohlav (ed.), Proceedings of the 8th Computer Vision Winter Workshop CVWW'03, Valtice, Czech Republic, pp.27-32. February 2003.
  
  • J. Perš, G. Vučković, B. Dežman, S. Kovačič."Scale-based human motion representation for action recognition.". In: ISPA 2003 : proceedings of the 3rd international symposium on image and signal processing and analysis, Rome, Italy, September 18-20, pp.668-673. 2003.
  
  • J. Perš, S. Kovačič."Multi-Scale Action Recognition in Squash Match". In: Proceedings of the eleventh International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenija, pp.295-298. September 2002.
  
  • J. Perš, M. Bon, S. Kovačič, M. Šibila, and B. Dežman. "Observation and analysis of large-scale human motion". Human Movement Science, 21(2): 295-311, July 2002.
   
  • J. Perš, S. Kovačič."Nonparametric, Model-Based Radial Lens Distortion Correction Using Tilted Camera Assumption". In: H. Wildenauer, W. Kropatsch (eds.), Proceedings of the Computer Vision Winter Workshop 2002, Bad Aussee, Austria, pp.286-295. February 2002.
  
  • G. Vučkovič, B. Dežman, F. Erčulj, S. Kovačič, J. Perš. "Computer tracking of players at squash matches". Acta kinesiol. Univ. Tartu, 7, suppl.: 216-220, 2002.
  
  • J. Perš and S. Kovačič."Tracking People in Sport : Making Use of Partially Controlled Environment". In: W. Skarbek (ed.), Computer analysis of images and patterns : 9th international conference, CAIP 2001, (Lecture notes in computer science, 2124), pp.374-382. Springer, September 2001.
   
  • J. Perš, G. Vučkovič, S. Kovačič, B. Dežman."A Low-Cost Real-Time Tracker of Live Sport Events". In: S. Lončarić, H. Babić (eds.), Proceedings of the 2nd international symposium on image and signal processing and analysis ISPA 2001, Pula, Croatia, pp.362-365. June 2001.
  
  • J. Perš, M. Bon, S. Kovačič."Errors and Mistakes in Automated Player Tracking". In: B. Likar (ed.), Proceedings of the Sixth Computer Vision Winter Workshop CVWW'01, Bled, Slovenia, pp.25–36. February 2001.
  
  • J. Perš, S. Kovačič."Computer Vision System for Tracking Players in Sports Games". In: Proceedings of the First Int'l Workshop on Image and Signal Processing and Analysis IWISPA 2000, Pula, Croatia, pp.81-86. June 2000.
  
  • J. Perš, S. Kovačič. "A System for Tracking Players in Sports Games by Computer Vision". Electrotechnical Review - Journal for Electrical Engineering and Computer Science, 67(5): 281–288, 2000.
  

Projects: