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1、ANOVELVIDEOKEYFRAMEEXTRACTIONALGORITHMT.MLiu':H.J.Zhang',F.H.Qi''DepartmentofComputerScienceU&EngineeringMicrosoftResearchAsiaShanghaiJiaotongUniversity49ZhichunRoadShanghai200030,ChinaBeijing100080,ChinaABSTRACTetal[2]andHanjalicandZhang[1I].Thekeyframeselectionisbasedont
2、henumberandsizesofunsupervisedclusters.KeyframeisasimpleyeteffectiveformofsummarizingalongInthispaper,weproposeanewkeyframeextractionvideosequence.Inthispaper,wepresentanovelkeyframealgorithm.Howmanykeyframestorepresentashotandwhereextractionalgorithm.Thenumberofandwhereto
3、placethekeytoplacethosekeyframesaredeterminedbytheperceivedframesaredeterminedbythePerceivedMotionEnergy@ME)motionintensityoftheshot.AfeaturenamedPerceivedMotionfeatureofashot.ThemotionpatternofatypicalsceneisEnergy@ME)isintroducedtodescribevideomotionandacomposedofamotion
4、accelerationprocessandafollowingtrianglemodelhasbeendevelopedtodescribethepattemofdecelerationprocessandthispatternisrepeatedinvideomotionintermofaccelerationanddecelerationprocess.Theleftsequence.Atrianglemodelisdevelopedtodescribethemotionbottomvertexofthetrianglereprese
5、ntsthestartpointofmotionpatternandsegmentvideosequences.Theframesatthestartaccelerationprocess,therightbottomvertexrepresentstheendpointandendpointofmotionaccelerationareselectedaskeypointofmotiondecelerationprocess,andthetopvertexoftheframescandidates,Soonecaninferthemove
6、mentinbetweentrianglerepresentsthepeakmotionpoint.Therefore,theframestwokeyframesandthesalientactioncontentinvideocanbeattheleftbottomandtopvertexesofthetriangles,whichareabstractedbythesekeyframes.equivalenttothestartpintandendpointofmotionacceleration,areselectedaskeyfra
7、mescandidates.Also,themoretriangles1.INTRODUCTIONexistinashotmeansmorecomplextheshotis,andmorekeyframesareneededtoabstracttheshot.Thatis,onecaninfertheAvideokeyframeistheframethatcanrepresentthesalientmovementactivitiesinbetweenkeyframes,andsalientactioncontentofavideoshot
8、.Keyframesprovideasuitablecontentinvideoisabstractedbythesekeyframes,anabstractionforvide
