A Fast Block—Matching Algorithm Using Smooth Motion Vector Field Adaptive Search Technique-中国期刊网

摘要 Inmanyvideostandardsbasedoninter-framecompressionsuchasH.26xandMPEG,block-matchingalgorithmhasbeenwidelyadoptedasthemethodformotionestimationbecauseofitssimplicityandeffectiveness.Nevertheless,sincemotionestimationisverycomplexincomputing.Fastalgorithmformotionestimationhasalwaysbeenanimportantandattractivetopicinvideocompression.Fromtheviewpointofmakingmotionvectorfieldsmoother,thispaperproposesanewalgorithmSMVFAST.Onthebasisofmotioncorrelation,itpredictsthestartingpointbyneighboringmotionvectorsaccordingtotheirSADs.Adaptivesearchmodesareusedinitssearchprocessthroughsimplyclassifyingmotionactivity.AfterdiscoveringtheubiquitousratiobetweentheSADsofthecollocatedblocksintheconsecutiveframes,thepaperproposesaneffectivehalf-stopcriterionthatcanquicklystopthesearchprocesswithgoodenoughresults.ExperimentsshowthatSMVFASTobtainsalmostthesameresultsasthefullsearchatverylowcomputationcost,andoutperformsMVFASTandPMVFASTinspeedandquality,whichareadoptedbyMPEG-4.

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A Fast Block—Matching Algorithm Using Smooth Motion Vector Field Adaptive Search Technique

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A Fast Block—Matching Algorithm Using Smooth Motion Vector Field Adaptive Search Technique

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