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There is a theory which states that if ever anybody discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened. (Douglas Adams)

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New LIRE Demo A new demo is up and running. It features ~ 1 million of images. Search is based on Solr with a custom plugin. See

Photo Intentions Test Data Set available Find out more here: photointentionsdata

Research on User Intentions

User intentions in multimedia is a novel and promising field as well as my main and most favourite research topic. Here are some interesting publications to read:

  • C. Kofler, M. Lux (2009) Dynamic presentation adaptation based on user intent classification. ACM Multimedia 2009 ACM page
  • M. Lux, C. Kofler, O. Marques (2010) A classification scheme for user intentions in image search. CHI 2010 ACM page
  • M. Lux, M. Kogler, M. del Fabro (2010) Why did you take this photo: a study on user intentions in digital photo productions. SAPMIA 2010 ACM page
  • M. Kogler, M. Lux, O. Marques (2011) Adaptive Visual Information Retrieval by changing visual vocabulary sizes in context of user intentions. MMWeb 2011 IEEE.
  • C. Lagger, M. Lux, O. Marques (2011) Which video do you want to watch now? Development of a Prototypical Intention-based Interface for Video Retrieval. MMWeb 2011, IEEE.
  • M. Lux , J. Huber (2012) Why did you record this video? – An Exploratory Study on User Intentions for Video Production. WIAMIS 2012 IEEE preprint, slides
  • C. Lagger, M. Lux, O. Marques, (2012) What Makes People Watch Online Videos: An Exploratory Study. Short article teaser published in ACM CIE online.
  • C. Lagger, M. Lux, O. Marques, (2012) What Makes People Watch Online Videos: An Exploratory Study. accepted for publication in ACM CIE preprint
  • M. Lux, M. Taschwer, O. Marques (2012) A Closer Look at Photographers’ Intentions: a Test Dataset, in Proceedings of the International ACM Workshop on Crowdsourcing for Multimedia held in conjunction with ACM Multimedia 2012, Oct 29 - Nov 2 2012, Nara, Japan preprint, poster.
  • M. Riegler, M. Lux, C. Kofler (2013) Frame the Crowd: Global Visual Features Labeling boosted with Crowdsourcing Information. Proceedings of the MediaEval 2013 Multimedia Benchmark Workshop, Barcelona, Spain, PDF
  • M. Lux, D. Xhura, A. Kopper (2014) User Intentions in Digital Photo Production: A Test Data Set. MultiMedia Modeling. Springer International Publishing, 2014. online

We further released a test data set of 1,309 images along with the intentions of the photographers acquired in a large survey. More information and the actual data is available here: photointentionsdata

Content Based Image Retrieval with LIRe

LIRe (Lucene Image Retrieval) is an open source library for content based image retrieval. Besides providing multiple common and state of the art retrieval mechanisms it allows for easy use on multiple platforms. LIRe is actively used for research, teaching and commercial applications. Due to its modular nature it can be used on process level (e.g. index images and search) as well as on image feature level. Developers and researchers can easily extend and modify LIRe to adapt it to their needs.


  • Phone: +43 (463) 2700 3615
  • Fax: +43 (463) 2700 99 3615
  • Address: Universitätsstraße 65-67, 9020 Klagenfurt, Austria
  • Email: mlux [at] itec [dot] aau [dot] at
  • Office: E.2.59
  • Consultation-Hour: Monday, 3-4 pm, :!: request appointments via email.
  • Curriculum vitae (long version, PDF)
  • Google Talk: mathias.lux [at] gmail [dot] com
  • Skype: Call via Skype

Short CV Prof. Dipl.-Ing. Dr. Mathias Lux is Associate Professor at the Institute for Information Technology (ITEC) at Klagenfurt University. He is working on user intentions in multimedia retrieval and production and emergent semantics in social multimedia computing. In his scientific career he has (co-) authored more than 80 scientific publications, has served in multiple program committees and as reviewer of international conferences, journals and magazines, and has organized multiple scientific events. Mathias Lux is also well known for the development of the award winning and popular open source tools Caliph & Emir and LIRe ( for multimedia information retrieval.

Dr. Mathias Lux received his M.S. in Mathematics 2004, his Ph.D. in Telematics 2006 from Graz University of Technology, both with distinction, and his Habilitation (venia docendi) from Klagenfurt University in 2013. He worked in industry on web-based applications, then as a junior researcher at a research center for knowledge-based applications. He was research and teaching assistant at the Knowledge Management Institute (KMI) of Graz University of Technology and in 2006 he started working in a post doc position at Klagenfurt University, at the Institute for Information Technology.

  • 1996-2004 Studies in Mathematics / Graz University of Technology
  • June 2004 Finished studies in Technical Mathematics at Graz University of Technology with distinction (Dipl. Ing. ~ master degree), find the thesis here.
  • 1998-2001 Employee and contract worker in companies of the Styria Medien AG group. (Carinthia Online, Media Consult Austria and Netconomy)
  • 2001-2006 Junior Researcher at the Know-Center
  • Nov. 2006 finished doctoral studies with distinction.
  • 2006-2013 Assistant professor at the Institute for Information Technology (ITEC) at Klagenfurt University
  • Oct. 2013 Habilitation at Klagenfurt University
  • 2014-… Associate Professor at the Institute for Information Technology (ITEC) at Klagenfurt University

Curriculum vitae - PDF version


Find a list of all my publications including links to the PDFs and BibTeX entries here:

Furthermore an incomplete list of my research related activities can be found here: Activities.


  • LIRE Help & Communication (2015/02/02 11:00)
    Hi there! I’m writing this basically in my own interest, but it may save me and you time I currently get a lot of mails regarding LIRE on how to do that, how to use that, or how to fix that. While I totally appreciate the popularity, I still have a “day job”, by being an […]
  • Web page changes (2015/01/30 10:00)
    Due to a security breach on the wiki, the developer documentation was spammed by a bot net, leading to a warning from my hosting company to get it under control. After getting it under control by basically taking the wiki online and replacing it with a static error page, we cam up with a new […]
  • LIRE 0.9.5 released (2015/01/29 10:54)
    It’s been more than a year since we made a release, so there have been lots of changes, fixes and new features. Most important of all is the integration of the SIMPLE descriptor, a local feature that works extremely well for content based image retrieval. This has been done with a lot of help from Nektarios […]
  • New LIRE Demo online (2014/12/17 15:59)
    I just put up the new LIRE demo at It’s based on the LIRE Solr plugin, which now supports arbitrary LIRE features and has been updated to fit the current Solr version 4.10.2. Check out the new search options for searching for tags in combination with image similarity. Basically you can use the first parameter […]
  • Gone: An Interactive Experience (2014/07/08 16:15)
    Our submission to the interactive Art Track of ACM Multimedia 2014 has been accepted: “Gone: An Interactive Experience for Two People” by Michael Riegler, Mathias Lux, Christian Zellot, Lukas Knoch, Horst Schnattler, Sabrina Napetschnig, Julian Kogler, Claus Degendorfer, Norbert Spot und Manuel Zoderer. Our project is an interactive installation, where two people interact based solely […]
start.txt · Last modified: 2014/11/07 10:45 by mlux