基于視覺的雕刻加工研究.pdf

1、華中科技大學(xué)博士學(xué)位論文基于視覺的雕刻加工研究姓名：謝明紅申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：機(jī)械制造及其自動(dòng)化指導(dǎo)教師：段正澄朱國(guó)力2002.11.5華中科技大學(xué)博士學(xué)位論文AbstractEngravingprogramplaysanimportantroleinengravingtechnologyItishardtoengraveacomplexthreedimensionsobjectusingconventionalengravingp

2、rocess，whichhasbeenabottleneckofengravingtechnologyandpromotetheresearchonengravingprocessThefocusofthisdissertationisonthestudyofmachinevisionbasedengravingprocessandengravingtechnologywhichsupportakeytechnologyforthede

3、velopmentofengravingtechnologyImagevectorizationisthebasisofengravingbasedonmonochromeAnautoadaptingadjustapproachbasedondirectionmoduleisproposedtotrackimageedges，whichoptimizedpathssearchedandallnodesoptimizationmethod

4、accordingt0beelineisalsoputforwardtodecreaselargeamountsofshortstraightlinesandensuresamenessofimageprofiletoobjectprototypeInaddition，wealsoproposeanapproachtoju吐getherelationshipsamongislandsintermsofraysAccordingtopar

5、titionprincipleofregionunit，themethodsoffillinginregionsandgeneratingtoolpathsarealsostudied，whichimprovetheefficiencyofengravingThekeyissuesinreverseengineeringbasedongreyimageareshaperecoveryandsurfacereconstructionThe

6、reisonlyshaperecoverybutnosurfacereconstructioninmanyexistingSFSmethods，whichrecoveronlynetworkpoints’heightofimagebylinearregressionorgradientalgorithm，butcannotensuresmoothnessofrecoveredshapeThisisthefirsttimetoapplym

7、achinevisiontechnologytoengraving，andanovelradialbasisfunctionneuralnetworkmodelisestablishedtecovershapeThisnetworkCanbeappliedtodifferentreflectionmodels，anditisabletorecoveranypoint’Sheightofacurvedface，whichhelpstoge

8、neratethetoolpathsAccordingtothisRBFnetworkmodel，asolutionbasedonreflectionfunctiontoshaperecoveryisproposedTheadaptiveadjustmentforcenterandwidthofRBFisstudied，inordertOimproverateofconvergenceandaccuracyofshaperecovery

9、；twomethodsofunttnownlightsourceestimationareproposed，whichprovideelementsforrecoveringarealimageofanobjectExperimentresultsindicatethatshaperecoverybasedonapproachesproposedinthisthesisisbetterthanthatbasedonotherexisti

10、ngmethodsAPCbasedengravingcontrolsystemisdeveloped，thecoredatastructureofthissystemisconstructed，andproblemsofNCcodessyntaxcheck，graphssimulationandspeedcontrolarealsostudiedThissystemintegratesengravingtechnologywithnum