基于Webcam的照片檢索技術(shù)的研究與實(shí)現(xiàn).pdf

1、浙江大學(xué)碩士學(xué)位論文基于Webcam的照片檢索技術(shù)的研究與實(shí)現(xiàn)姓名：程敏申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：信號(hào)與信息處理指導(dǎo)教師：葉秀清20030101AbstractWiththefastpopularizingofdigitalcamerasandrapidincreasingofstoragecapacityitisriotuncommontostorethousandsofimagesonacomputerContentbasedimag

2、eretrieval(cnm)isthereforebecomingapopularresearchfieldinallkindsofacademicorcommercialinstitutiousInmostofCBIRsystems，queryimageisusuallyobtainedfromthesalveimagedatabasethatisbeingretrievedThisisleastusefuliosomepracti

3、calcasesifusersarelookingforsomespecificimagesinallimagedatabaseForexample，usermaywanttoreprintsomephotosfromalargedatabaseHe／shehasthepreviouslyprintedphotoonhandandwantstofindthesamephotoindatabaseandreprintmorecopiesI

4、nthisscenario，thebestqueryimageisonuser’shandandtheeasiestwaytoinputtheimageisusinganonlinevideocanleraThispaperistointroduceanewtechniquefortherealworldphotosearchingWithanaverageWebcam，thetechniqueistohaveasnapshotatap

5、rintedphoto，thenautomaticallyfindoutthemostsimilarphotos，especiallytheoriginalphotooftheprint，inthedigitalphotostorageItincludesthreetechnicalpartsPart1isContentBasedImageRetrievalWeextractcoloredge，andtexturefeaturefrom

6、imagesWiththesefeatureswecarldefinethesimilaritybetweenimagesandfindthemostmatchingonesintheimagedatabaseIntheretrievalresult，userscanspecifythoseimagesthatarenotsimilarwithwhattheywantBasedonthisinformation，thesystemcan

7、automaticallyadjusttheimportanceofeachfeatureandgiveanimprovedretrievalresultPart2isSnapshotProcessingThemainroleofthispartistoextractthephotofrom協(xié)esnapshotandmakeittheexampleforretrievalItshouldbeabletodealwithblurred，t

8、ilted，andincompletelyviewedimagesinrealworldPart3istheColorConstancyproblemInchangedlightingcondition，thecolorofthesnapshotwillalsochange，whichinfluencedtheeffectoftheretrievalresultTherefore，wemustfindtheconstantcolorsw

9、hicharerobottothechangeofthelightandallpossibleexternalfactorsByanalysingandtestingaquantityofappropriatealgorithms，wefinallydeterminedanoptimalsolutionOurexperimentalresultsshowedthatwecarachievesatisfactoryresults，whic