基于二维图像的距离测量方法-李伟

CX201502020166，，，，，。。、。、、。TG806TH741AMeasuringMethodBasedon2DImageLiWeiHeYibinSongLongFengXiaoliangZengYajunHeDeAbstractFordirectcontactwiththetraditionalwayofmeasuringontheoperationandusecannotsatisfytheproblemsuchasautomationinordertoimprovethemeasuringprecisionandefficiencybasedonimagenon－contactdistancemeas-urementmethodisproposed．Inthefirstplaceinthescenewithaddingacalibrationscaleandthescalebetweentheobjectundertest．Thenusethecameratothescenescenerealimages．Togetmarkscale＇simageinimageprocessing．Finallytheformulatocalculatetheactualdistanceoftheobjecttobetestedanalysiscomparewithverniercalipermeasuredistance．Theschemeintheprocessofrangingomittedimageofcameracalibrationimagecorrectionandsoonaseriesofcomplexstepsavoidingtheprocessingerroroftheimageeffectivelyimprovesthedigitalmeasurementaccuracyandefficiency．Theresultsindicatedthatbycomparingthetestdataandverniercaliperactualmeasurementdatabasedonthenon-contactran-gingmethodispracticalandeffectivegoodadaptabilityhighmeasureprecisionconformtotherequirementsoftheactualindustrialproduction．Keywordsimagemeasuringedgedetectionwavelettransformationverniercaliper1。、、、、。22.1CCD、1。、。。1。1111201751No．2DOI:10.16567/j.cnki.1000-7008.2017.02.0282.2、、、、。、、2。。fxyxyGxy=GxG[]y=f/xf/[]y1Gxy=G2x+G2槡y。Gxy=Gx+Gy2Gxy≈maxGXGY3αxy=arctanGyGx4αx。2.3Ｒoberts、PrewittSobel。。。ψt∈L1∩L2ψt=∫Ｒω2ωdω＜∞5ψαbt=1槡aψt－baab∈Ｒa≠06ψαbψtab。b－aΔψb+aΔψ×±ω0－Δψa±ω0+Δψa7b±ω0aaΔψΔψa。。、、。1k=0Khh2Gmmn=12fm+1n－fm－1n8Gmmn=12fmn+1－fmn－19mn。3ωmn=exp－G2mmn+G2nmn2h2104fk+1mn=∑1α=－1∑1β=－2fkm+αn+βωkm+αn+β∑1α=－1∑1β=－2ωkm+αn+β11k=Kk=K+12k=K。。30．5cm2L=n*0．5+px－knxknx－kn－1x*0．5cm12211PnPpxPknx、kn－1xn、n－1。12L。Sobel、3。2aSobelbc33a、3bSobelSobel。3b3c。42。42123458．4014．0040．318．4040．31Sobel8．3714．0540．378．2540．398．3114．0840．408．3340．418．3614．0240．338．3740．333Sobel。Sobel。。4。。、、。1．J．20134030308005．2．J．20152315－19．430073FirstAuthorLiWeiPostgraduateSchoolofMechanicalandElectricalEnginWuhanInstituteofTechWuhan430073China430073CorrespondingAuthorHeYibinProfessorMasterTutorSchoolofMechanicalandElectricalEnginWuhanInstituteofTechWuhan430073China311201751No．2