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Semantic Technologies

In recent years the Semantic Web has emerged as one of the most essential achievements for the future of the World Wide Web (WWW). Semantic Web technology extends the WWW but also enables to improve applications which are related to other fields such as communication, information, knowledge, media, and interaction technologies. Semantic Web provides not just new technologies and tools but also new paradigms and ways of thinking, to make information processing more efficient and more structured.

Our research is focussed on the devolpment and improvement of 'semantically supported multimedia retrieval and search technologies'.

Table of Contents

  • Current News
  • Prior Events and Activities
  • Research Topics
  • Research Team
  • Former Team Members
  • Teaching
  • Supervised Master Theses
  • Projects and Partners
  • In the Media
  • Recent Publications

Research Topics

  • (1) Semantic Multimedia
  • (2) Linked Data Engineering and Applications
  • (3) Semantically enhanced Information Retrieval (Semantic Search)
  • (4) Knowledge Mining and Ontological Engineering
  • (5) Semantically enriched e-Learning Applications

Job Offers

Research Team

Former Team Members

  • Dr. Olaf Hartig (PostDoc)
  • Dinesh Reddy, M.Sc.
  • Tamara Bobic, M.Sc.
  • Dipl.-Inf. Katarina Birghan
  • Bernhard Quehl, M.Sc.
  • Dr. Nadine Steinmetz
  • Dr. Haojin Yang
  • Dipl.-Inf. Lina Wolf
  • Dipl.-Dokumentar Johannes Hercher
  • Joscha Jäger, M.A. (internship)
  • Johannes Osterhoff, M.A.
  • Dipl.-Inf. Zalan Kramer

Our group

Left to Right: Nadine Steinmetz, Johannes Osterhoff, Dr. Harald Sack, Jörg Waitelonis, Christian Hentschel, Bernhard Quehl

Publications

 ...  2009  2010  2011  2012  2013  ...     Advanced Search
Aufsätze:
1.

Lecture Video Indexing and Analysis Using Video OCR Technology

Haojin Yang Harald Sack Christoph Meinel
International Journal of Multimedia Processing and Technologies (JMPT), vol. 2(4):176-196 12 2011
file:174129
2.

Whoknows? - Evaluating Linked Data Heuristics with a Quiz that cleans up DBpedia

Jörg Waitelonis Nadine Ludwig Magnus Knuth Harald Sack
International Journal of Interactive Technology and Smart Education (ITSE), vol. 8(4):236-248 2011
file:176272
Beiträge in Tagungsbänden:
3.

Lecture Video Indexing and Analysis Using Video OCR Technology

Haojin Yang, Maria Siebert, Patrick Lühne, Harald Sack, Christoph Meinel
In Proceedings of the 7th International Conference on Signal Image Technology and Internet Based Systems (SITIS 2011), Dijon, France, 12 2011 IEEE Press. to be published
4.

Automatic Lecture Video Indexing Using Video OCR Technology

Haojin Yang, Maria Siebert, Patrick Lühne, Harald Sack, Christoph Meinel
In Proceedings of the IEEE International Symposium on Multimedia 2011 (ISM 2011), Dana Point, CA, USA, 12 2011 IEEE Press. to be published
5.

Sneak Preview? Instantly Know What To Expect In Faceted Browsing

Johannes Osterhoff, Jörg Waitelonis, Joscha Jäger, Harald Sack
In Proceedings of Interaktion und Visualisierung im Daten-Web, Workshop at INFORMATIK 2011 (IVDW 2011) , Berlin, Germany, 10 2011 to be published
6.

RISQ! Renowned Individuals Semantic Quiz – A Jeopardy like Quiz Game for Ranking Facts

Lina Wolf, Magnus Knuth, Johannes Osterhoff, und Harald Sack
In Proceedings of 7th International Conference on Semantic Systems (I-SEMANTICS 2011), of ICPS, Graz, Austria, 9 2011 ACM Press.
7.

The Generation of User Interest Profiles from Semantic Quiz Games

Magnus Knuth, Nadine Ludwig, Lina Wolf, and Harald Sack
In Proceedings of the 2nd International Workshop on Mining Ubiquitous and Social Environments (MUSE 2011), Athens, Greece, 9 2011
8.

Named Entity Recognition for User-Generated Tags

Nadine Ludwig, Harald Sack
In Proceedings of the 8th International Workshop on Text-Based Information Retrieval (TIR 2011), of CS, Toulouse, France, 9 2011 IEEE Press. to be published
9.

WhoKnows? - Evaluating Linked Data Heuristics with a Quiz that Cleans Up DBpedia

Nadine Ludwig, Jörg Waitelonis, Magnus Knuth, Harald Sack
In Proceedings of the 8th Extended Semantic Web Conference (ESWC 2011), of LNCS, Heraklion, Greece, 6 2011 Springer.
10.

More than the Sum of its Parts: CONTENTUS – A Semantic Multimodal Search User Interface

Jörg Waitelonis, Johannes P. Osterhoff, Harald Sack
In Proceedings of Workshop (in conjunction with ACM IUI 2011) on Visual Interfaces to the Social and Semantic Web (VISSW 2011), volume 694 of CEUR Workshop Proceedings, Palo Alto, CA, USA, 2 2011
11.

Towards exploratory video search using linked data

Jörg Waitelonis, Harald Sack
In Proceedings of International Conference on Multimedia Tools and Applications (MTAP 2011) , volume 53 pages 1-28, Netherlands, 2011 Springer Press.
12.

WhoKnows? - Evaluating Linked Data Heuristics with a Quiz that Cleans Up DBpedia

Jörg Waitelonis, Nadine Ludwig, Magnus Knuth, Harald Sack
In International Journal of Interactive Technology and Smart Education (ITSE), volume 8 pages 236-248, 2011 Emerald.
 ...  2009  2010  2011  2012  2013  ... 

Projects and Partners

 

  • AV-Portal Gottfried-Leibnitz-Universität Hannover, project with Technische Informationsbibliothek Hannover (TIB)
  • Semantic Media Explorer (SEMEX)
    The Semantic Media Explorer is a demonstrator that combines the latest media analysis processes to provides optimal access to video content.
  • MEDIAGLOBE Project
    The aim of MEDIAGLOBE is to open and interlink heterogenouse and currently isolated information sources in media archives and broadcasting corporation. Project partners: DEFA-spektrum, Medienbildungsgesellschaft Babelsberg mbH, Blue Order GmbH
  • THESEUS/CONTENTUS Project
    The purpose of CONTENTUS is to develop basic technologies with which to access, archive and search for multi-media cultural assets and works of art.
  • YOVISTO
    Yovisto is a video search engine specialized in academic content. Yovisto's search index is based on the combination of automated content based video analysis with user generated collaborative annotation (collaborative tagging, discussions, and comments). In difference to traditional video search engines, Yovisto enables pinpoint access within video data by providing fine-granular, time-dependent metadata.
  • Semantic Games
    Games with a purpose that are dedicated to create and curate semantic content.

Current News

Prior Events and Activities

 

2011

2010

2009

Teaching

 

 

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2014 (SS)

2013/14 (WS)

2013 (SS)

  • Seminar (Master): Semantic Multimedia (Blog)
  • Seminar (Bachelor): Multimedia Analyse Technologien (Blog)
  • Schülerkolleg (für Schüler der 8. bis 10. Klasse): Internetsuche und Google PageRank - Wie wird was durch wen gefunden?

    • Woche 1 - 09.04.2013: Die Geschichte der Web-Suchmaschinen (pdf)
    • Woche 2 - 23.04.2013: Term- und Dokumentenranking (pdf)
    • Woche 3 - 07.05.2013: Google Page Rank (pdf)
    • Woche 4 - 21.05.2013: Personalisierung und Web Crawling (pdf)
    • Woche 5 - 04.06.2013: Semantische Suche

 

 

2012/13 (WS)

2012 (SS)

2011/12 (WS)

2011 (SS)

2010/11 (WS)

2010 (SS)

2009/10 (WS)

 

 

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Supervised Master Theses

  • Gerald Töpper: Erweiterung der DBpedia Ontologie und des Extraction Frameworks zur Sicherung der Datenqualität. (finished April 2012)
  • Peter Retzlaff: Visualisierung von Bag-of-Visual-Words-Vektoren für die Visual Concept Detection (finished March 2014)
  • Sebastian Stange: Evaluierung einer semantischen Videosuche und Ermittlung geeigneter Videoanalysetechniken (finished March 2014)
  • Michael Wolowyk: Semantic Recommender Systems (preliminary title) (in progress)

Open Master Theses

Please find a list of possible topics for Master Theses. Contact us, if you are interested in one of these topics or have own suggestions.

  • Video Analysis:

    • OCR Spellcorrection
    • Tag Relevance Estimation in Photo Communities
    • Learning Local Image Descriptors

  • Linked Data and Semantic Web:

    • Named Entity Evolution
    • Authority File Mapping
    • A Mereology for Media Fragments

 

 

 

Press

 

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