Mats Sjöberg

Post-graduate researcher

Office:

Room T-B312 in Computer Science Building,
Konemiehentie 2, Otaniemi campus area, Espoo

Postal Address:

Aalto University School of Science and Technology,
Department of Information and Computer Science,
P.O. Box 15400, FI-00076 Aalto, Finland

Telephone:

+358 9 470 25296

Email:

mats.sjoberg@aalto.fi

You can also visit my personal home page.

Research Interests

• Content-Based Image and Information Retrieval and Multimodal Interfaces
• Our group has taken part in the TRECVID video retrieval evaluations since 2005.
• PicSOM: a content-based image retrieval system based on the Self-Organizing Map.

Teaching

Assistant for T-61.5100 Digital Image Processing.

Previously assistant for T-61.6030 Multimedia Retrieval (special course) in 2008 and T-61.5070 Computer Vision from 2007 to 2010.

Publications

• Mats Sjöberg, Satoru Ishikawa, Markus Koskela, Jorma Laaksonen, and Erkki Oja. PicSOM experiments in TRECVID 2011. In Proceedings of the TRECVID 2011 Workshop, Gaithersburg, MD, USA, December 2011. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. [More info]
• Timo Honkela, Oskar Kohonen, Jorma Laaksonen, Krista Lagus, Klaus Förger, Mats Sjöberg, Tapio Takala, Harri Valpola, and Paul Wagner. Learning semantics of movement. In Neural Information Processing Systems (NIPS 2011) Workshop Book, page 22, Granada, Spain, December 2011. Abstract. Available online at http://media.nips.cc/Conferences/2011/NIPS-Workshops-Book-2011.pdf. [More info]
• He Zhang, Mats Sjöberg, Jorma Laaksonen, and Erkki Oja. A multimodal information collector for content-based image retrieval system. In Proceedings of 18th International Conference on Neural Information Processing (ICONIP 2011). Springer, 2011. [More info]
• Mats Sjöberg and Jorma Laaksonen. Analysing the structure of semantic concepts in visual databases. In Jorma Laaksonen and Timo Honkela, editors, Advances in Self-Organizing Maps, volume 6731 of Lecture Notes in Computer Science, pages 338–347. Springer, 2011. [More info] [See also: dx.doi.org ...]
• Ville Viitaniemi, Mats Sjöberg, Markus Koskela, and Jorma Laaksonen. Concept-based video search with the PicSOM multimedia retrieval system. Technical Report TKK-ICS-R39, Aalto University School of Science and Technology, Department of Information and Computer Science, Espoo, Finland, December 2010. [More info]
• Mats Sjöberg, Markus Koskela, Milen Chechev, and Jorma Laaksonen. PicSOM experiments in TRECVID 2010. In Proceedings of the TRECVID 2010 Workshop, Gaithersburg, MD, USA, November 2010. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. [More info]
• Mats Sjöberg, Markus Koskela, Ville Viitaniemi, and Jorma Laaksonen. PicSOM experiments in ImageCLEF RobotVision. In Devrim Ünay, Zehra Çataltepe, and Selim Aksoy, editors, Recognizing Patterns in Signals, Speech, Images and Videos, volume 6388 of Lecture Notes in Computer Science, pages 190–199, Istanbul, Turkey, August 2010. Springer Berlin / Heidelberg. [More info] [See also: dx.doi.org ...]
• Mats Sjöberg, Markus Koskela, Ville Viitaniemi, and Jorma Laaksonen. Indoor location recognition using fusion of SVM-based visual classifiers. In Proceedings of 2010 IEEE International Workshop on Machine Learning for Signal Processing, pages 343–348, Kittilä, Finland, August-September 2010. [More info]
• Ville Viitaniemi, Mats Sjöberg, Markus Koskela, and Jorma Laaksonen. Automatic video search using semantic concepts. In Proceedings of 8th European Conference on Interactive TV and Video (EuroITV 2010), Tampere, Finland, June 2010. [More info]
• Mats Sjöberg, Ville Viitaniemi, Markus Koskela, and Jorma Laaksonen. PicSOM experiments in TRECVID 2009. In Proceedings of the TRECVID 2009 Workshop, Gaithersburg, MD, USA, November 2009. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. [More info]
• Markus Koskela, Mats Sjöberg, and Jorma Laaksonen. Improving automatic video retrieval with semantic concept detection. In Proceedings of 16th Scandinavian Conference on Image Analysis (SCIA 2009), volume 5575 of Lecture Notes in Computer Science, pages 480–489, Oslo, Norway, 2009. Springer Verlag. [More info]
• Mats Sjöberg and Jorma Laaksonen. Optimal combination of SOM search in best-matching units and map neighborhood. In Proceedings of 7th International Workshop on Self-Organizing Maps (WSOM 2009), volume 5629 of Lecture Notes in Computer Science, pages 281–289, St. Augustine, Florida, USA, 2009. Springer. Available online at: http://dx.doi.org/10.1007/978-3-642-02397-2_32. [More info]
• Philip Prentis, Mats Sjöberg, Markus Koskela, and Jorma Laaksonen. Image theft detection with self-organising maps. In Proceedings of 19th International Conference on Artificial Neural Networks (ICANN 2009), volume 5768 of Lecture Notes in Computer Science, pages 495–504, Limassol, Cyprus, 2009. Springer Verlag. Available online at: http://dx.doi.org/10.1007/978-3-642-04274-4_52. [More info]
• Markus Koskela, Mats Sjöberg, Ville Viitaniemi, and Jorma Laaksonen. PicSOM experiments in TRECVID 2008. In Proceedings of the TRECVID 2008 Workshop, Gaithersburg, MD, USA, November 2008. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. [More info]
• Ville Viitaniemi, Mats Sjöberg, Markus Koskela, and Jorma Laaksonen. Exploiting temporal and inter-concept co-occurrence structure to detect high-level features in broadcast videos. In Proceedings of 9th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2008), pages 12–15, Klagenfurt, Austria, May 2008. [More info]
• Mats Sjöberg, Jorma Laaksonen, Timo Honkela, and Matti Pöllä. Inferring semantics from textual information in multimedia retrieval. Neurocomputing, 71(13–15):2576–2586, 2008. [More info]
• Markus Koskela, Mats Sjöberg, Ville Viitaniemi, Jorma Laaksonen, and Philip Prentis. PicSOM experiments in TRECVID 2007. In Proceedings of the TRECVID 2007 Workshop, Gaithersburg, MD, USA, November 2007. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. PDF (98 kB) [More info]
• Markus Koskela, Mats Sjöberg, Jorma Laaksonen, Ville Viitaniemi, and Hannes Muurinen. Rushes summarization with self-organizing maps. In Proceedings of the TRECVID Workshop on Video Summarization (TVS'07), pages 45–49, Augsburg, Germany, September 2007. ACM Press. Available online at http://dx.doi.org/10.1145/1290031.1290039. PDF (261 kB) [More info]
• Jorma Laaksonen, Markus Koskela, Mats Sjöberg, Ville Viitaniemi, and Hannes Muurinen. Video summarization with SOMs. In Proceedings of the 6th Int. Workshop on Self-Organizing Maps (WSOM 2007), Bielefeld, Germany, 2007. Available online at http://dx.doi.org/10.2390/biecoll-wsom2007-143. PDF (370 kB) [More info]
• Mats Sjöberg, Hannes Muurinen, Jorma Laaksonen, and Markus Koskela. PicSOM experiments in TRECVID 2006. In Proceedings of the TRECVID 2006 Workshop, pages 262–270, Gaithersburg, MD, USA, November 2006. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. PDF (189 kB) [More info]
• Mats Sjöberg, Jorma Laaksonen, Matti Pöllä, and Timo Honkela. Retrieval of multimedia objects by combining semantic information from visual and textual descriptors. In Proceedings of 16th International Conference on Artificial Neural Networks (ICANN 2006), pages 75–83, Athens, Greece, September 2006. Springer. Available online at http://dx.doi.org/10.1007/11840930_8. PDF (733 kB) [More info]
• Mats Sjöberg, Ville Viitaniemi, Jorma Laaksonen, and Timo Honkela. Analysis of semantic information available in an image collection augmented with auxiliary data. In Ilias Maglogiannis, Kostas Karpouzis, and Max Bramer, editors, Proceedings of 3rd IFIP Conference on Artificial Intelligence Applications and Innovations, pages 600–608, Athens, Greece, June 2006. IFIP, Springer. Available online at http://dx.doi.org/10.1007/0-387-34224-9_70. PDF (2 MB) [More info]
• Mats Sjöberg. Content-based retrieval of hierarchical objects with PicSOM. Master's thesis, Laboratory of Computer and Information Science, Helsinki University of Technology, 2006. PDF (1 MB) [More info]
• Markus Koskela, Jorma Laaksonen, Mats Sjöberg, and Hannes Muurinen. PicSOM experiments in TRECVID 2005. In Proceedings of the TRECVID 2005 Workshop, pages 262–270, Gaithersburg, MD, USA, November 2005. Available online at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.html. PDF (1 MB) [More info]
• Mats Sjöberg and Jorma Laaksonen. Content-based retrieval of web pages and other hierarchical objects with Self-Organizing Maps. In Proceedings of 15th International Conference on Artificial Neural Networks (ICANN 2005), pages 841–846, Warsaw, Poland, September 2005. Available online at http://dx.doi.org/10.1007/11550907_133. PDF (308 kB) [More info]
• Mats Sjöberg, Jorma Laaksonen, and Ville Viitaniemi. Using image segments in PicSOM CBIR system. In Proceedings of 13th Scandinavian Conference on Image Analysis (SCIA 2003), volume 2749, pages 1106–1113, Halmstad, Sweden, June/July 2003. Springer Verlag. Available online at http://www.springerlink.com/content/65xgpgqc9cjquqcl/. PDF (149 kB) [More info]

Master's Thesis

Content-based retrieval of hierarchical objects with PicSOM, Laboratory of Computer and Information Science, Helsinki University of Technology.
Download: Abstract [PDF] | Entire document [PDF].

Photos

Photos from various work-related trips.

Washington D.C., TRECVID Workshop 2010.
Istanbul, ICPR 2010 conference.