基于圖像處理的印制電路板缺陷檢測的研究.pdf

1、華中科技大學碩士學位論文基于圖像處理的印制電路板缺陷檢測的研究姓名：段練申請學位級別：碩士專業(yè)：物理電子學指導教師：胡兵20110106華中科技大學碩士學位論文華中科技大學碩士學位論文IIAbstractPrintedcircuitboard(PCB)isthecrucialcomponentofelectronicproductwhichprovideselectricalconnectiontheexcellentqualityof

2、PCBisdefinitelyprerequisitefstabilityofelectronicproducttherefePCBdefectinspectionisnecessarytomanufacturebutconventionalmethodcannotmeetthedemssuchashighspeedaccurateestimationlowundetectabilityhenceautomaticopticalinsp

3、ection(AOI)hasbeenmainstreamwhichhashigherspeedaccuracylesscost.ThePCBautomaticopticalinspectionhasbeendiscussedinthispaper.Basedontheyofimageprocessingmachinevisionthesystemschemeofdefectinspectionisestablishedalgithmsr

4、equiredinschemeareinvestigatedsoftwarestructureisdesignedimplementedinVisualC.Defectinspectionsystemiscomposedofilluminationsystemimageacquisitiondeviceimageprocessingsystemwhichincludesimageprocessdefectinspection.Defec

5、tdetailofPCBwillclearlyappearbyusingasetsofalgithmssuchasimagepreprocessingregistrationsegmentationcomparisonthendefectsalsocanbeaccuratelylocated.Afteranalyzingtheacteristicofmultipledefectsthreedifferentdesignconceptof

6、inspectionsystemthispaperestimatescrespondingschemesagainstspecificdefects.Theresultsofexperimentshowtheschemeswhichiscontactlessmeetthedemofaccuracyconventionalmethodcannotcandetectlocatetypicaldefectdimensionallymeasur