基于图像的CAD模型检索算法研究及应用
北华航天工业学院硕士学位论文
Abstract
Inthe
fieldofandistouse3DCADmodelsto
aerospaceengineering，itveryimportant
theexternalandstrucnlreofandtheir
virtuallydisplayshapeproducts
theconstructionof3Dmodelsisaalotof
verycomplicatedprocess，whichrequirestimeand
cost．Iftherearetoothemodelwill
manydesignsduringconstruction，it
repetitivecertainly
causewasteoftheandof
resources，reduce
productionmanufacturingefficiencyenterprises，
andthusreducetheofretrievalCan
competitivenessenterprises．Matureretrieve
algorithms
similarmodelsfromthe
modelvaluableinformationorusethe
base，obtaindirectlyoriginal
framework，thustime
designgreatlyreducingrepetitivework，reducingcosts，and
sh撕ng
modelfeaturecontainstheinformationofa3D
knowledge．However，asingleonlygeometric
cannotthe3Dmodelwell．Itisto
model，whichoftendi伍cultextractfeatures
representdirectly
fromthe2D
3Dareusedtounderstand3Dsumis
model，SO
imagesusuallyobjects．Toup，it
toamodelretrievalthatcallandretrieve．This
urgentdesignalgorithma