000146460 001__ 146460
000146460 005__ 20180913055644.0
000146460 037__ $$aREP_WORK
000146460 245__ $$aAnalyzing Flickr Groups
000146460 269__ $$a2008
000146460 260__ $$bIDIAP$$c2008
000146460 336__ $$aReports
000146460 500__ $$aTo appear in Proceedings of CIVR'08
000146460 520__ $$aThere is an explosion of community-generated multimedia content available online. In particular, Flickr constitutes a 200-million photo sharing system where users participate following a variety of social motivations and themes. Flickr groups are increasingly used to facilitate the explicit definition of communities sharing common interests, which translates into large amounts of content (e.g. pictures and associated tags) about specific subjects. However, to our knowledge, an in-depth analysis of user behavior in Flickr groups remains open, as does the existence of effective tools to find relevant groups. Using a sample of about 7 million user-photos and about 51000 Flickr groups, we present a novel statistical group analysis that highlights relevant patterns of photo-to-group sharing practices. Furthermore, we propose a novel topic-based representation model for groups, computed from aggregated group tags. Groups are represented as multinomial distributions over semantically meaningful latent topics learned via unsupervised probabilistic topic modeling. We show this representation to be useful for automatically discovering groups of groups and topic expert-groups, for designing new group-search strategies, and for obtaining new insights of the semantic structure of Flickr groups.
000146460 700__ $$0243367$$aNegoescu, Radu-Andrei$$g176657
000146460 700__ $$0241066$$aGatica-Perez, Daniel$$g171600
000146460 8564_ $$uhttp://publications.idiap.ch/downloads/reports/2008/negoescu-idiap-rr-08-03.pdf$$zURL
000146460 8564_ $$s2220255$$uhttps://infoscience.epfl.ch/record/146460/files/negoescu-idiap-rr-08-03.pdf$$zn/a
000146460 909C0 $$0252189$$pLIDIAP$$xU10381
000146460 909CO $$ooai:infoscience.tind.io:146460$$pSTI$$preport
000146460 937__ $$aLIDIAP-REPORT-2008-050
000146460 970__ $$anegoescu:rr08-03/LIDIAP
000146460 973__ $$aEPFL$$sPUBLISHED
000146460 980__ $$aREPORT