1、天津大學碩士學位論文動態(tài)圖像序列中運動目標檢測若干技術(shù)問題的研究姓名:張競申請學位級別:碩士專業(yè):測試計量技術(shù)及儀器指導教師:王向軍20070501ABSTRACTThetechnologyofobjectdetectionandtrackingisoneofthehotspotsinthefieldofcomputervision,whichisalsothebasicandimportanttechnologyintheapplic
2、ationofsmartsurveillance,humanmachineinterface,mobileRobertnavigation,full—sightcaterpillarsystemandSOonDynamicimagesequencespossessnotonlyspatialpropertieslikeimages(suchascolortextureetc),butalsotemporalproperties,name
3、lythemotioninformationThus,comparedwiththetraditionalimageanalysistechniques,motioninformationanalysisinimagesequencesplaysmoreimportantroleinsolvingtheabovementionedproblemsHoweverinthepracticalapplications,jitteringcam
4、era,movingobjects’irregularmotion,themovingbackgroundcausedbycameramotionetcmakethedetectionofmovingobjectsdifficultAthoroughresearchonthedetectionofmovingobjectsindynamicimagesequenceshasbeencarriedthroughinthisdisserta
5、tionMainresearchworksandachievementsofthisdissertationarelistedasfollows:(1)Amethodofdetectingmovingpointobjectsindynamicimagesequencesisproposed,whichisbasedonthecombinationoftwomethods:detectingmethodbasedonfirstordern
6、ormofflamedifferencevectorsandthemethodbasedonpeakvaluedetectioninairspacesearchedbydoublewindowsItcandetectnotonlythepointobjectwhosedisplacementisnolessthanonepixelbetweentwocontinuousframes,butalsothepointobjectwhosed
7、isplacementisnomorethanonepixelbetweentwocontinuousframesandwhosedisplacementgatheredofmultiplecontinuousframesislargerthanonepixelTheresuhindicatesthat,thismethodprovidesanewsolutiontodetectmultiplemovingpointobjectsind
8、ynamicimagesequenceseffectively(2)Amethodisproposedtoestimateglobalmotion,whichisbasedon6parameteraffinemodelThemethodistoestimatethelawofthecameramotion,whichcausesthebackgroundmovingintheimagesequencesBytheestimationof
9、globalmotion,thepixelcorrespondencesbetweenadjacentframescanbeaRmned,andframescallbecompensatedwiththeparametersgetbytheglobalmotionestimation,thustheproblemwithcomplexmovingbackgroundcanbesimplifiedto也eonewithstaticback