realtime effects on high resolution video实时的高分辨率视频效果

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1、MasterofScienceThesisDepartmentofComputerScienceLundInstituteofTechnologyReal-timeVideoEffectsUsingProgrammableGraphicsCardsVideoeffekterirealtidmedprogrammerbaragrafikkortKlasSkogmarSupervisor:LennartOhlssonAbstractThethesistreatstheuseofmodernconsum

2、ergraphicscardsfordoingreal-timemanipulationswithhigh-resolutionvideo.Ademoprogramwasdevelopedforcolorcorrectingvideousingthegraphicscardinsteadofusingtheprocessor.Thedemoprogramshowstheabilitiesofthismethodfordoingimage-specifictasks.Otherprogramswerealsousedtotestthismethod’sperformanceofrende

3、ringvideotothescreen,andtotestthetransferratebetweenthecardandtheprocessor.Myconclusionisthatthisissomethingthathasagreatpotential,butthetransferspeedfromthegraphicscardtothememoryhastobeimproved.Thisisasoftwareissue,butthisproblemisabouttoberesolvedwithdriverupdates.Alreadydriverupdateshaveenha

4、ncedtheperformancebyseveralhundredpercent.Itisalreadyatechniquethatiscapableofenhancingthevisualizationofthemodificationsthataremade.Thisisasufficientreasonformakingprogramsthatutilizethegraphicscardinsteadoftheprocessor.ContentsREAL-TIMEVIDEOEFFECTS1USINGPROGRAMMABLEGRAPHICSCARDS1Abstract21.Int

5、roduction5Background5Emergenceofhighresolutionbroadcasts6Higherdynamicrange7Modifyingvideoinreal-time8Theproblems82.Programmablegraphicscards103.Effectsonthegraphicscard12Colorcorrection12Masking13Colorkeying14Compositing14Transitions14Painting153D-effects15Limitations154.Highresolutionchallenge

6、s16Discspace17Transferspeeds17Resolutionlimitations18Usingthegraphicscard185.Workingpractice20ScandvisionInterview206.Existingtechnology23Dedicatedhardware23OpenGL:sImagingsubset23DirectX924Quicktime25ATI’stechnologies25Nvidia’stechnologies25CinePaint257.Buildingmediatools27Whycreateademoprogram

7、?27BuildingmediatoolsusingDirectShowandgraphicscards27Accessingthegraphicscard29Transformfilters29Connectingitwithagraphicaluserinterface30DirectShow-filter30TheMFCGUI31Testingtheprogram328.Performanceanalysis34ATI'sdemoprog