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Using Social Media to Identify Events,

Using Social Media to Identify Events,
ACM MM 2011 | Nov 28 - Dec 1 | Scottsdale, Arizona, USA. International ACM Workshop on Social Media (WSM11).

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Wsm2011 Wsm2011 Presentation Transcript

  • Using Social Media to Identify EventsXueliang Liu <xueliang.liu@eurecom.fr>Raphaël Troncy <raphael.troncy@eurecom.fr>Benoit Huet <benoit.huet@eurecom.fr> Multimedia Department, EURECOM, France.
  • What are Events? Events are observable occurrence grouping People Place Time Experiences documented by Media A natural way to organize media 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -2
  • There’s a lot of information out there… 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -3
  • Events Mining from Social Media? Events ?Photos from Flickr.com 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -4
  • Related Work EventBurn.com  Creating summaries about known events (searching Twitter, Facebook, and Flickr) Firan et al. (CIKM’10)  Organizing personal photos based on Social Events Gao et al. (WWW’11)  Employing real-time micro-blog data to discover events Liu et al. (ICMR’11)  Finding media illustrating events 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -5
  • Observation Media are captured during events and shared Capture Time, Geo-localization User Tags (Annotations) Machine-Tag (lastfm:event=1337426) 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -6
  • Our Event DataSet 9 attractive venues from the EventMedia dataset (110000 events) Venue Name NbEvents NbPhotos NbUsers rank Melkweg 352 6912 266 1 Koko 151 3546 155 5 HMV Forum 106 2650 130 8 111 Minna Gallery 24 1369 105 14 HMV Hammersmith Apollo 79 2124 96 20 Circolo degli Artisti 148 2571 86 29 Circolo Magnolia 79 2190 76 40 Ancienne Belgique 212 7831 56 83 Rotown 204 3623 49 101 Total : 1355 32816 - Event Ground Truth obtained from the official agendas  available from individual venue websites. 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -7
  • Detecting and Identifying Events Our solution consists of 3 steps:  Location Monitoring: finding the bounding-box of venues.  Temporal Analysis: detecting events by analyzing the uploading behavior along time.  Event Topic Identification: identifying detected events’ topics through tag analysis. 14 12 10 8 6 4 2 0 10/05/01 10/05/06 10/05/11 10/05/16 10/05/21 10/05/26 10/05/31 Location Temporal Event Topic ResultsMonitoring Analysis Identification 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -8
  • Event Detections Location Monitoring 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) -9
  • Venue Bounding Box Estimation1 : INPUT : VenueName2 : OUTPUT : BoundingBox3 : PhotoSet []4 : Center GetInfo( VenueName)5 : EventSet GetPastEvents(VenueName)6 : foreach event in EventSet do7: photos GetFlickrPhoto(event)8: PhotoSet.append ( photos)9 : end10 : GeoSet GetGeoInfo( PhotoSet)11 : Filter (GeoSet, Center, threshold 1km)12 : RETURN MinRect(GeoSet) 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 10
  • Venue Bounding Boxes (a selection) Paradiso HMV Hammersmith Apollo Melkweg KoKo 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 11
  • Our Media DataSet Flickr Photos  Taken in May 2010  In either one of the 9 selected locations: Number of Photos Name Overlap Total Geo-tagged Venue Name taggedKoko 372 2040 3 2409Rotown 90 273 1 362Melkweg 363 700 8 1055HMV Forum 184 412 0 596111 Minna Gallery 937 3 0 940Ancienne Belgique 2206 288 2 2492Circolo degli Artisti 70 553 1 622Circolo Magnolia 95 236 0 331Hammersmith Apollo 287 84 0 371 Total : 4604 4589 15 9178  Photos rarely have both geo-tag and venue name tag! 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 12
  • Analyzing Photo Capture Dates (Flickr) 250 200 Events ? Number of Photos 150 100 50 0 10/05/01 10/05/06 10/05/11 10/05/16 10/05/21 10/05/26 10/05/31 Days Number of photos taken in Melkweg in May 2010 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 13
  • Analyzing Photos Owners (Flickr) 14 12 Events ? 10 Number of Owners 8 6 4 2 0 10/05/01 10/05/06 10/05/11 10/05/16 10/05/21 10/05/26 10/05/31 Days Number of photo owners in Melkweg in May 2010 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 14
  • Event Detection Approach Based on media upload activity  At a given time  At a given location Events can be detected by: et arg(ti T) i  Where ti N photos * N owners T : Threshold Venue/Event popularity  Adaptive thresholding 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 15
  • Event Topics Mining Keep the top N most frequent tags Result: melkweg anouk amsterdam jemaine 2010 european flight flightoftheconchords conchords fotc mckenzie clement tour bret evelyn 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 16
  • Event Detection Example 111 Minna Gallery in May 2010 Number of photos * Number of photo owners Days 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 17
  • Results Evaluation of Detection alternatives:  Thresholding function: mean vs median  Parameters: Photo vs Owners vs Photos*Owners Source Threshold True Detection False Detection F1 mean 43 21 0.211 Photos median 64 51 0.279 mean 56 56 0.246 Owners median 58 62 0.251 mean 34 18 0.172 Photos*Owners median 67 53 0.289 Events with no or too few photos cannot be detected! The Ground Truth references Events! NOT PHOTOS! 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 18
  • Event Detection and Identification Results Our Methods Venues GT LastFM Detected Matched Precision Recall Melkweg 69 15 12(4) 0.800 0.174 44 Koko 20 15 8 (8) 0.533 0.400 0 HMV Forum 14 12 9 0.750 0.643 14 111 Minna Gallery 23 15 2(2) 0.133 0.087 0 Ancienne Belgique 38 15 9(2) 0.600 0.237 28 Rotown 16 15 8 0.533 0.500 13 Circolo degli Artisti 22 15 8(1) 0.533 0.364 12 Circolo Magnolia 25 3 1 0.333 0.040 11 Hammersmith Apollo 15 15 10 0.667 0.667 14 In total 242 120 67 0.558 0.277 136 (*) Number of correctly identified events which are not referenced in LastFM 13% additional events 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 19
  • Events at Melkweg (NL) in May 2010 Detection Results Ground Truth LastFMVenue Date Tags Date Title LastFM Title parkwaydrive drive Parkway Drive / Despised Icon /melkweg 03/05/2010 parkway 03/05/2010 Winds Of Plague / The Warriors / 50 Lions 1336473 Parkway Drive flight flightoftheconchords Flight of themelkweg 02/05/2010 conchords 02/05/2010 Flight Of The Conchords - UITVERKOCHT 1439320 Conchords Flight of themelkweg 04/05/2010 flightoftheconchords 04/05/2010 Flight Of The Conchords - UITVERKOCHT 1439407 Conchords Mayer mayerhawtorne mayer Hawthorne &melkweg 05/05/2010 hawthorne 05/05/2010 Mayer Hawthorne & The County 1416229 The Countymelkweg 11/05/2010 bonobo 11/05/2010 Bonobo - UITVERKOCHT 1398102 Bonobomelkweg 14/05/2010 paulweller paul 14/05/2010 Paul Weller - UITVERKOCHT 1406677 Paul Weller Broken Socialmelkweg 18/05/2010 brokensocialscene 18/05/2010 Broken Social Scene - UITVERKOCHT 1334429 Scene Mike Stern band with special guest Richardmelkweg 19/05/2010 mikestern richardbona 19/05/2010 Bona featuring Dave Weckl & Bob Malachmelkweg 25/05/2010 beattimemelkweg 24/05/2010 Beattime - The Kika Editionmelkweg 26/05/2010 beattime 24/05/2010 Beattime - The Kika Edition Off Centre - day 3 - night met Kode 9 / Faltymelkweg 28/05/2010 offcentre 28/05/2010 DL / Gold Panda / Kelpemelkweg 30/05/2010 joannanewsom 30/05/2010 Joanna Newsom 1425481 Joanna Newsom 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 20
  • Mike Stern @ Melkweg on May 19th 2010 GroundTruth Title: Mike Stern band with special guest Richard Bona featuring Dave Weckl & Bob Malach Time:2010-5-19
  • Mike Stern @ Melkweg on May 19th 2010 Top Tags Mikestern Richardbona 19mei2010 Daveweckl Bobmalach Melkweg Amsterdammelkweg Concert Concertphotography concertphoto Time 2010-5-19 GroundTruth Title: Mike Stern band with special guest Richard Bona featuring Dave Weckl & Bob Malach Time:2010-5-19
  • Beattime @ Melkweg on May 24th 2010 GroundTruth Title: Beattime - The Kika Edition Time: 2010-5-24 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 23
  • Beattime @ Melkweg on May 24th 2010 Top Tags 24052010 BeattimeMelkweg amsterdam Nederland Netherlands Sp550uznoord Holland Olympus Cityscape Time 2010-5-25 GroundTruth Title: Beattime - The Kika Edition Time: 2010-5-24
  • Conclusion A novel approach for automatically detecting social events is presented The key idea consists in temporally monitoring media shared on social web sites at a specific location (Geo Localized Photo) Automatic Efficient Social Event Detection and Identification can be achieved Meta-Objective / Future work: Social Event analysis based on connections between events, media and participants 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 25
  • Thank you for your attention… Q&A http://www.slideshare.net/huetbenoit/wsm2011 30/11/2011 Using Social Media to Identify Events - International ACM Workshop on Social Media (WSM11) - 26