Mats Sjöberg

Post-graduate researcher

Research Interests

• Content-Based Image and Information Retrieval and Multimodal Interfaces
• PicSOM: a content-based image retrieval system based on the Self-Organizing Map.

Teaching

Assistant for T-61.5100 Digital Image Processing and T-61.5070 Computer Vision.

Previously assistant for T-61.6030 Multimedia Retrieval (special course) in 2007.

Contact Information

E-mail: mats.sjoberg at tkk.fi

You can also visit my personal home page.

Publications

• 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), 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. PDF (224 kB) [More info]
• Philip Prentis, Mats Sjöberg, Markus Koskela, and Jorma Laaksonen. Image theft detection for bitmap images with self-organising maps. In Proceedings of 19th International Conference on Artificial Neural Networks (ICANN 2009), Limassol, Cyprus, 2009. Springer Verlag. Accepted for publication. [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. [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. [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://biecoll.ub.uni-bielefeld.de/volltexte/2007/154/index_en.html. [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. [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. [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. [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. [More info]
• Erkki Oja, Mats Sjöberg, Ville Viitaniemi, and Jorma Laaksonen. Emergence of semantics from multimedia databases. In Yen and Fogel, chapter 9. [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. [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. [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/. [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. All are links to flickr.com.

Florida, WSOM 2009 workshop.

Lappeenranta, Hatutus vuosikokous 2009.

Quebec, IEEE Sections Congress 2008.

Chania, Crete, Greece, Summer School on Multimedia Semantics 2008.

Bielefeld, Germany, WSOM 2007 workshop.

Athens, ICANN 2006 conference.

Warsaw, ICANN 2005 conference.

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