While at Yahoo! Research I was involved in various projects on analyzing, extending and utilizing tagging of Flickr photos. We analyzed what type of tags users applied to their photos and devised a method for classifying those tags into semantic categories. We developed two prototypes, one for tag recommendation and and one for tag based browsing of photos. We started our tag analysis by mapping tags to WordNet broad categories and found out that while users annotations are sparse, they…
Roelof van Zwol, Lluis Garcia Pueyo, Mridul Muralidharan, Börkur Sigurbjörnsson. Ranking Entity Facets based on User Click Feedback. In: Fourth IEEE International Conference on Semantic Computing (ICSC 2010). 2010.
Börkur Sigurbjörnsson and Roelof van Zwol. TagExplorer: Faceted Browsing of Flickr Photos. Yahoo! Labs Technical Report (YL-2010-005). 2010.
Roelof van Zwol, Lluis Garcia Pueyo, Mridul Muralidharan, Börkur Sigurbjörnsson.
Machine learned ranking of entity facets
In: Proceeding of the 33rd international ACM SIGIR conference on Research and development in information retrieval. 2010. (short paper)
Roelof van Zwol, Börkur Sigurbjörnsson, Ramu Adapala, Lluis Garcia Pueyo, Abhinav Katiyar, Kaushal Kurapati, Mridul Muralidharan, Sudar Muthu, Vanessa Murdock, Polly Ng, Anand Ramani, Anuj Sahai, Sriram Thiru Sathish, Hari Vasudev, and Upendra Vuyyuru.
Faceted exploration of image search results
In: WWW ’10: Proceedings of the 19th international conference on World wide web.
Matthijs van Leeuwen, Francesco Bonchi, Börkur Sigurbjörnsson, and Arno Siebes.
Compressing tags to find interesting media groups
In: Proceeding of the 18th ACM conference on Information and knowledge management (CIKM 2009).
One of my most fruitful project while working at Yahoo! Research was a collaboration with the Yahoo! Image Search team. We built system for extracting and ranking points of interest for towns, countries and regions. The points of interest were extracted from Wikipedia, Yahoo! GeoPlanet and Yahoo! Travel. The ranking was based on co-occurrence statistics from Flickr photos and Yahoo! Image Search query logs. The resulting data package was generated by the research team and applied by Yahoo! Image Search…
The TagExplorer was prototype that I made while at Yahoo! Research in Barcelona. The TagExplorer enabled browsing Flickr photos using semantically organized tag clouds. The prototype combined two research projects that I was working on at the time, tag recommendation and tag classification (see references below). For example, if the user typed in London, they would be presented with photos from London (obviously), together with semantically categorized refinement suggestions, such as the locations England and Southwark or the landmarks Big…