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ID:39402281
大小:1.14 MB
页数:53页
时间:2019-07-02
《基于双目视觉的移动车辆三维重建方法研究与应用》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、合肥工业大学硕士学位论文基于双目视觉的移动车辆三维重建方法研究与应用姓名:任冉冉申请学位级别:硕士专业:检测技术与自动化装置指导教师:朱程辉20100401ResearchandApplicationof3DReconstructionOnMovingVehiclebasedonBinocularStereoVisionABSTRACTAsanewfieldbasedonvariousinterdisciplinary,stereovisionisanimportantattributeofintelligentrobot.Binocularstereovisionisst
2、ereovisionanimportantbranch,hasbeenappliedinmanyfields,suchasmedicalimageprocessing,multimediatechnology,theanalysisofsensingimage,imagedatabases,etc.Theintegratedbinocularstereovisionsystemgenerallyincludesimageacquisition,cameracalibration,featuresextraction,stereomatching,3Dreconstructi
3、on,etc.ItisthroughfurtherresearchofbinocularstereovisionthatwecanusemobilerobotsinsteadofhumanexaminersinAutomaticStakeTestSymemtoprovideatheoreticalbasisandreference.Thefollowingarethemajorcontentsinthethesis:1.Cameracalibrationbasedonone-dimensionalcalibrationobjectiSproposed.The1Dcalibr
4、ationobjectismovingaroundafixedpoint.Bytakingatleastsixpicturesoftherollingobjectatafixedcameraviewpositionanddirection.Wecansetupasetoflinearequationsusingthepropertyofperpendicularlines.Thus,acameraintrinsicmatrixcanbeobtainedbysolvingtheseequations.Thesimulationresultsshowthatthemethodi
5、Sfeasibleandeffective.2.Stereomatchingalgorithmbasedonimagesegmentationisproposed.BasedonBleyeralgorithmframeworkthecalculationofplanesandtheselectionoftheglobalenergyfunctionhasbeenimproved.Theplaneparametersofeachsegmentarecomputedonlyusingreliablepixels,andinaccordancewiththecharacteris
6、ticsofunreliablepoints,constructanewsegmentmatchingcostforgroupneighboringsegments.Thescopeoftheinitialdisparityisusedasaconstraintoftheglobalenergyfunction,theenergyfunctionisgloballyminimizedusinggraphcuts.Theexperimentalresultsshowthatthealgorithmhasabetterperformanceinlowtextureregions
7、andoccludedportions,andhashighaccuracyandrealtime.3.Three.dimensionalreconstructionbasedonbinocularvisionisproposed.Makinguseofmid—pointofcrossoverlinetoget3Dpointscoordinate,asthealgorithmtoconsiderlinearequationsofgeometricsignificance,thusenhancingthe3Dpoin
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