工程曲線圖掃描矢量化方法的研究.pdf

1、河海大學(xué)碩士學(xué)位論文工程曲線圖掃描矢量化方法的研究姓名：李春曉申請學(xué)位級別：碩士專業(yè)：水利水電工程指導(dǎo)教師：張蓉生20080501AbstractDuetothedensecoordinategridinterlacedwithanumberofsmoothingcurvesandprintingflawsinacharacteristiccuⅣeimage，itisVerytediousandlowe箍cienttocaptureth

2、einfonnationincharacteristiccurvesusingpresentmethodsTopresentanmethodofEliminationCoordinateGrid(ECG)，anaIgorithmofPolylineSimulationSpline(PSS)cuⅣe，arepairedmethodforthecurvegapsandaalgorithmofMulti—factorForecastingTr

3、acking(MFT)forthevectorizationofanengineeringcuⅣeimagewithdensecoordinategridandcmssline—elementswereproposedECGusedlinedetectingmethodtoeIiminatethecoordinategridandautomaticaIlyrestoretheneaurlevel鋤dVerticalcun，epixels

4、baSedonthegrayscaleinthefilteredimagePSSfonlledanumberoftheIinesegmentstoapproachthecurVebythegiVencurvenodes，whoselocalgeometricalfeaturewasthesameassplinecurVeMFTf’0recastedthenextboundarypointofthecurVebasedonthegray—

5、scaleofthe廳ontboundarypointsthetangentialVectorofthecurrentboundarypointandtherelatiVepositionamongnonbackgroundpixelsin24nei曲borhoodsThechangeofthecurVecurvatureanglew2LsmonitoredtoaVoid’’offtrackin∥andthecurvebreakpoin

6、tswerestriddenbysearchthes鋤ecun，epixels1ayerbylayerComparedt2V55aIldScanIn51，itwastllemoreintelligentalldautomaticinvectorizationKeywords：complexIineelementimageVectorization，eliminationcoordinategrid，polylinesimulations