Video Hyperlinking (LNK) TRECVid 2016 Maria Eskevich, Martha Larson (Radboud University) Robin Aly, Roeland Ordelman (University of Twente) Gareth J. F. Jones (Dublin City University) Benoit Huet (EURECOM)
VideoHyperlinking(LNK)TRECVid 2016
MariaEskevich,MarthaLarson(Radboud University)RobinAly,RoelandOrdelman (UniversityofTwente)
GarethJ.F.Jones(DublinCityUniversity)BenoitHuet (EURECOM)
Terminology• Video (e.g.,2hours)
• Videoclip (e.g.,10min)
• Anchor:segment(unconstraint)forwhichauserrequestsalink(e.g.,1min)“Iwanttoknowmoreaboutthis”• Hyperlink
• Target:relevantsegmentforgivenanchor(Nosegmentationenforced)
16Nov.2016 TRECVidVideoHyperlinkingOverview
Collectiondetails
• Blip10000dataset:14,838semi-professionallycreatedvideos• ASRtranscripts:LIMSI(2012,2016)andLIUM(2012)• Shotsegmentation(2012)• Visualfeatures(AlexNet):1000visualconcepts
16Nov.2016 TRECVidVideoHyperlinkingOverview
Observationfrom2015• Toomuchambiguityinanchors•Previouslycreatedanchorswerenotalwaysmultimodal
16Nov.2016 TRECVidVideoHyperlinkingOverview
Strategyfor2016• Truemultimodalityofanchorsreduceambiguity•Weassumemorereliablerelevanceassessment
TV’16:focusonmultimodality
Lookforanchorscontainingacombinationofverbal-visualinformation:• Verballinguisticcues:̀ cansee',`seeinghere',`thislooks’,`lookslike',`showing',`wanttoshow’• Visualcues:actionsandobjectscrucialforthisvideoarenotexplicitlynamedormentioned
16Nov.2016 TRECVidVideoHyperlinkingOverview
Anchorcreation:practicaldetails
• Devset:28anchorscollectedforSearchandHyperlinking2012MediaEvaltask• Testset:94anchorsdefinedby2humanannotators(mediaprofessionals)• AnchorVerificationstageonAmazonMTurk:• Feedbackcollectionfrom3workersforeachanchor(26and93respectivelyfromdevelopmentandtestsets)• ExamplesintheHITweretakenfrombothdevelopmentandtestsets(2+1)• 3anchorsfromthetestsetwerediscardedasconfirmednottobeproperlyverbal-visual• 90testsetanchorsverifiedfortaskevaluationusage
16Nov.2016 TRECVidVideoHyperlinkingOverview
Anchorexample• Textualdescription:• “Wearelookingforvideosofpeopleexplainingwhereandhowtheylive.”
16Nov.2016 TRECVidVideoHyperlinkingOverview
TargetVetting:Forcedchoice
CaseID Choiceoftargetdescription Feedbackondecisionmakingprocess Relevancedecision
1 Correct Positive Relevant
2 Correct Negative ManualCheck
3 Other Positive Non-Relevant
4 Other Negative Non-Relevant
Participants• Numberof registrations:16
• INF BeijingUniversityofPostsandTelecommunicationUniversityAutonoma deMadridShandongUniversityXianJiaoTongUniversitySingapore
• VIREO CityUniversityofHongKong• IRISA CNRS,IRISA,INSA,Universite deRennes1• EURECOM EURECOM• FXPAL FXPALOALTOLABORATORY,INC• NII_Hitachi_UIT NationalInstituteof Informatics,Japan(NII);Hitachi,Ltd;UniversityofInformationTechnology, VNU-HCM,Vietnam(HCM-UIT)
• ORAND ORANDS.A.Chile• PKU_ICST PekingUniversity• VideoVision PESUniversity• EURECOM_POLITO Politecnico diTorinoEurecom• REGIMVID REGIM,ResearchGroupon IntelligentMachinesNationalSchoolofEngineers,
UniversityofSfax,Tunisia• Trimps TheThirdResearchInstituteoftheMinistryofPublicSecurity,P.R.China• HAWKEYE TsinghuaUniversity• TUZ TUBITAKUZAY• Waseda Waseda University• IIP_WHU Whuhan University
• Submittingparticipants:5groups(20officialruns)
Targetvetting:details
• Variabilityin20runssubmissions:• Top5ranks:7216diverseanchor-targetpairs- NEW!• Top10ranks:14271diverseanchor-targetpair
• Targetvetting:HITprocessing• 3judgmentsforeachanchor-targetpairfromthetop5(21648HITsubmissions)• Batchtargetvettingassessment:forcedlogic• Finalrelevancejudgmentassignmentforeachanchor-targetpairisbasedonmajoritydecisionover3crowdworkersdecisions
Summaryandobservationssofar• Disruptivedataissuein2016:nodirectcomparisonwith2015• However:thetaskhappened!• Collectionwithstate-of-the-artfeatures• Improvedanchorscreationprocessthatleadstohigherrelevanceassessmentreliability
• Post-workshopanalysisisinprogress
16Nov.2016 TRECVidVideoHyperlinkingOverview
Practicalplansfor2017• Continuationofthetask• Default:BlipTV collection
• 2016multimodalanchors• Potentialaddition:BBC2015collection
• Nomultimodaldevelopmentanchors• Whatistheaddedvalue?• Differentusescenario• Differentanchor/targetdensityinprofessionalcontent
• Taskfocus:• Multimodalityinanchors• Featuresofinterest?
16Nov.2016 TRECVidVideoHyperlinkingOverview