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Flickr

Flickr. the framework of Flickr. Observe them. How many photos does each user offer? How many tags does each photo have? The tag hot-list How many comments does each photo have? The ratio of the geo-tagged photos. dataset. European Travel on Flickr http://www.flickr.com/groups/europe05/

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Flickr

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  1. Flickr the framework of Flickr

  2. Observe them • How many photos does each user offer? • How many tags does each photo have? • The tag hot-list • How many comments does each photo have? • The ratio of the geo-tagged photos.

  3. dataset • European Travel on Flickr http://www.flickr.com/groups/europe05/ • 1154 members • 500- providers • About 15000(pretended) photos • Actual 4500 photos

  4. How many photos does each user offer?

  5. How many photos does each user offer?

  6. How many photos does each user offer? • 1 photo : 77 users • 2 photos : 85 users • 3 photos : 44 users • 4 photos : 56 users • 5 photos : 29 users • 6 photos : 24 users • 7 photos : 21 users

  7. How many photos does each user offer? • Top 10 providers has 20% photos. • Top 20 providers has 30% photos. • Top 53 providers has 50% photos. • 486 providers / 1154 members

  8. How many photos does each user offer? • Visit the top 10 providers’ albums. • See their photos, photosets and groups

  9. Top1 (195 photos, England) • http://www.flickr.com/photos/77185053@N00 • Photoset: UK, Paris, Crete, Switzerland, USA Group: France image, This is Europe, Top20 France, TRAVEL Photography

  10. How many photos does each user offer? • Not easy to build a dataset by tracing group members’ albums automatically (by Flickr API) because many of the photos are beside. • Some people only upload the photos to associated group and not in their own album.

  11. How many photos does each user offer? • But we can still expand our dataset from some members’ photos approximately. (manually) • Through the groups the members belong to, we can find other suitable groups.

  12. How many tags does each photo have?

  13. How many tags does each photo have?

  14. How many tags does each photo have? • 209 (5%) photos without any tag • 1tag : 135 photos • 2tags : 302 photos • 3tags : 270 photos • 4tags : 319 photos • 5tags : 302 photos • 6tags : 392 photos • 7tags : 345 photos • 8tags : 262 photos • 9tags : 265 photos

  15. How many tags does each photo have? • 62131 photos • 5069 (8%) without any tag

  16. How many tags does each photo have? • Most of the photos have non-zero tags. • Not really a power-law distribution, photos < 10 tags are common and few has more than 10 tags.

  17. The tag hot-list • European travel 446 Europe + 427 europe + 121 europa + 105 Europa = 1009 549 (1st) travel + 135 Travel = 684

  18. The tag hot-list • Country : 334 France + 264 france = 598 275 Italy + 242 italy + 119 italia = 636 202 spain + 187 Spain = 389

  19. The tag hot-list • Scene • 138 landscape • 166 architecture • 125 water • 114 church • 110 sky • 101 sea • 97 building • 87 river

  20. Why we tag?

  21. Why we tag? Self/Organization: Search and Retrieval • traditional annotation motivations in personal photo collections • tag specifically to later retrieve their pictures for sharing • tag for personal organization purposes

  22. Why we tag? Self/Communication: Memory and Context • aid future recall of the situation it depicts • adding context is the traditional motivation for annotating printed photographs • the memory function of tags was still not a popular motivation.

  23. Why we tag? Social/Organization: Public Search and Photo Pools • Making their photos findable by others • Enrich and share experiences • Be discovered by anyone who may be interested in the photo

  24. Why we tag? Social/Communication: Context and Signaling • communicate contextual information to others about the image • added these contextual tags for the benefit of known others, such as friends or family • For privacy, friends or family would understand what the tags meant

  25. Why we tag? Summary for motivations • tags can play several roles

  26. Why we tag? conclusion • organization for oneself is a more common motivation than communication for oneself • over half of our participants used tags for personal search and retrieval; very few were motivated to tag for personal memory

  27. Why we tag? Conclusion (cont.) • communicationwith friends and family is a more common motivation than organization for friends and family • organization for the general public is a much more common motivation than communication.

  28. How many comments does each photo have?

  29. How many comments does each photo have?

  30. How many comments does each photo have? • 1711 (38%) photos have no comments • Unlike tags, it’s a power-law distribution

  31. The ratio of the geo-tagged photos • Photo counts = 4497 • With geo counts = 1182 (26%) • Without geo counts = 3315

  32. Future work • Work with Winston's "Video Search Reranking" to think about how to design a query

  33. Reference • Why We Tag: Motivations for Annotationin Mobile and Online Media (2007 ACM) • http://www.flickr.com/services/api/

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