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Flickr Tags Network

Flickr Tags Network. Mustafa Kilavuz. Tags. A tag is a keyword Search , spam detection, reputation systems, personal organization and metadata. Usage. Social bookmarking Personal bookmarks Allows users to store and retrieve resources Social tagging systems

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Flickr Tags Network

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  1. Flickr Tags Network Mustafa Kilavuz

  2. Tags • A tag is a keyword • Search, spam detection, reputation systems, personal organization and metadata

  3. Usage • Social bookmarking • Personal bookmarks • Allows users to store and retrieve resources • Social tagging systems • Shared tags for particular resources • Each tag is a link to additional resources tagged the same way by other users • Folksonomy: popular tags

  4. Youtube

  5. Delicious

  6. Last.fm

  7. Last.fm

  8. Last.fm

  9. Flickr

  10. Vocabulary Problem • Different users use different terms to describe the same things • Polysemy: A single word has multiple meanings • Synonymy: Different words have the same meaning • Abstraction: Tagging a resource in different levels of abstraction • Animal, cat, Persian cat, Felissilvestriscatus longhair Persian • Different languages • Missing context: Tags that could not be related with the images by others • Holiday, me, friends, a person’s name

  11. Tag Usage on Flickr • The tag usage is not mandatory in Flickr. • User can tag their friends’ photos. But within 58 million tag observed, the overwhelming majority are owner tags. • Most people has very few distinct tags while a small group has extremely large sets of tags.

  12. Tag vocabulary size across the set of users

  13. Growth of distinct tags • 10 users are randomly chosen • Frequent uploaders ( > 100 photos) • Frequent taggers ( > 100 tags) • The number of distinct tags are observed as the number of photos uploaded increases.

  14. Growth of distinct tags

  15. Vocabulary Formation Vocabulary overlap distribution for random users and contacts

  16. Tag frequency distribution in Flickr

  17. Number of tags per photo in Flickr

  18. Information from a Flickr Photo • Useful • User • Upload date • Tags • View count • Groups • Other • Title • Description • Comments

  19. Data Extraction Method • http://www.flickr.com/services/api/ • Iterate on each user • Iterate on each public photo of the user • Get all contacts and group information • Iterate on each group • Iterate on each photo in the group

  20. Tripartite Network Model page person tag • Can project onto bipartite graphs • person – tag • tag – page • person – page • Can project onto one-mode graphs • person – person • tag – tag • person - page From LadaAdamic

  21. A bipartite model

  22. Tag Network Model Sky Building 34 12 10 Window Cloud 80 2 54 28 Blue 4 23 Light

  23. aTagsLife

  24. Geotags • Additional place information • Spatial distribution, places • San Francisco, museum • Temporal distribution, events • Burst of tagging in a small time interval

  25. Clusters • Strongly connected tags • Flickr uses for years for searching

  26. What we can do.. • Investigate clusters to get information about • Events and their relations • Interests and their relations • Etc.

  27. Tag Categories

  28. Tag Categories

  29. QUESTIONS?

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