简介:Specularandstrongreflectionsarethemainproblemsencounteredduringpartimagedefectinspectionofshinyorhighlyreflectivesurfaces.Inthisletter,weproposeanimprovedilluminationmethodfordefectinspection.Adiffuselightsourceisdesignedbasedonthephysicsanalysisoflightreflection.Thedistributionofintensityissimulatedaccordingtoaknownmodeltoverifytheilluminationuniformityofthesource.Experimentsshowthatdefectexpressivitywhenusingtheproposedilluminationmethodhasabetterperformance.Theopticalmodelisnotonlysuitableforthedefectdetectionofmetalballsbutalsoforthedefectdetectionofplanesandcylinders.
简介:Thedifferentreflectioncharacteristicsofthesurfaceoftinsteelstripsandthedifferentspeedsofthetinninglinedemandanadaptiveilluminationlightsourceforonlinemachinevisioninspection.Thislightsourcecanbeintegratedwithatimedelayintegrationcharge-coupleddevice(TDICCD)tocapturetheimagesofmovingobjectsandfacilitateinspectionofthesurfacequalityoftinsteelstrips.On-siteapplicationshowtheeffectivenessoftheTDIcamerawiththeadaptiveilluminationlightsourceindetectingthesurfacedefectsontinsteelstripsofthreedifferentmaterialsandwithdifferenttincoatingweights.
简介:<正>The"ChineseDream"hasbeenthecatch-praseandtopicofrecentdays,becauseitembodiestheardentaspirationofallChinesepeopleforabeautifulChinaandbetterlife.GeneralSecretaryXiJipingelaboratedontheblueprintandgoalsofthe"ChineseDream"attheclosingceremonyofthe1stSessionofthe12thNPC,aswellashowcouldwerealizethisDream.