圖像矢量化方法研究.pdf

1、杭州電子科技大學碩士學位論文圖像矢量化方法研究姓名：朱婧申請學位級別：碩士專業(yè)：計算機軟件與理論指導教師：余正生201112杭州電子科技大學碩士學位論文ABSTRACTImagevectorizationisoneoftheimportantproblemsindigitalimageprocessing，anditisaacrosssubjectincludingcomprehensivecomputervision，computer

2、imageprocessing，computergraphicsandintelligence，andotherdisciplinesVectorimagehasalotofadvantages：firstofall，vectorimageismadeofsimplegeometricfigurecomponents，withcompactstructureandsmallstoragespace；Secondlythevectorim

3、ageiseasytoedit，whenweeditvectorimage，suchasrotating，stretching，weonlyneedto，modifythecorrespondingparameterinformationofgeometriccomponents；third，thevectorobjectiseasytoenlargeorcompression，anditsdisplayqualityonthecomp

4、uterwillnotbereduced，magnificationofthevectorimageCanke印sharpfeaturesofthehornside，andwon’tappearfuzzyandinfluencedisplayqualityForagivencolorrasterimage，wecangetpixelsinformationoftheimage，pixelinformationincludingposit

5、ioninformationandcolorinformation(usuallyusingRGBvalue)Changetheinputcolorimagestovectorimage，wecaneasilytorealizetheextensionandcompressionediting，animationoftheimage，andotheroperationsManyexistingimagevectorizationalgo

6、rithmsonlyapplytotheengineeringdrawings，andinrecentyearstheimagevectorizationalgorithmsbegantodeal、析t11photosoflevelcolorimagesThispaperfirststudiedimagevectorizationusingoptimizationgradientmeshesForacolorimage，wesegmen

7、ttheimageintosectionsfirstlyprocessingtheimagewithsomechildobjects，andthenusingquadrilateral鰣dtoapproximateobjectsGradientgridsstructuredbythismethodareFergusonsurfacesinessenceDuetojointhegradientinformation，themethodha

8、sverygoodeffecttotonalcolorimageThisarticleproposedtwokindsofnewimagevectorizationmethodbasedonpartialdifferentialequation’analyticalsolutionandnumericalsolution，extractinginformationofpixellinebyline，calculatingthecontr

9、olpointsofbsplinethroughinformationofthesepixels，andthebsplinecuiNesareellipticpartialdifferentialequation’SboundaryconditionsImagevectorizationmethodbasedonpartialdifferentialequation’Sanalyticalsolutionefficientlycalcu

10、latepartialdifferentialequation’Ssolutionthroughanalyticalsolutionmethod，andreconstructthewholeimagethroughthegeneratedpatchesImagevectorizationmethodbasedonpartialdifferentialequation’Snumericalsolutioncalculatepartiald