pdf417条码_pdf417二维条码_pdf417条码限长(2)

Becauseweuseordinarycameratocapturethebarcodeimage,theedgeofthebarcodeimageisveryvague,andtheimagealwayshassomekindofdistortion。Ifweusethegeneralbinarizationmethod,theeffectivenessandefficiencycannotmeettherequirementoftheexperiment。Inthis***,weimproveglobalthresholdmethodtobinarizethebarcodeimage,comparetothegeneralglobalthresholdmethodandOtsumethod,notonlyitcanachievereasonableresults,butalsothetimecomplexityofthealgorithmsisadapttothereal-timeinPDF417barcoderecognition。pdf417条码Atlast,theRecognitionanddecodingprocesshavebeenyzedandstudiedindetail。

Thetraditionalmethodsaremostlybasedontheedgeofbarcodeimageandtheunitofthecodewordmodule。ThefirstmethodhashighrequirementinbarcodequalityandthesecondmethodrequirehighaccuracyoftheimageAcquisitionFacility。Whentherearesomepseudo-edgesinthebarcodeimageorthebarcodeimagehassomekindofdistortion,thesemethodsaredifficulttogettherightbarcodeinformation,becausealloftheseabove,weusuallyuseRSerrorcorrectioncodetocorrecterrorinformation,butevenRSerrorcorrectioncodehasitsownshortcoming。Sobasedontheresearchofotherpeople\'swork,anewalgorithmhasbeenputforwardtoavoidtheover-relianceoferrorcorrectioncode。

Inthis***,wefirstcalculatethewidthofbarcodeunit,andthenuseittodetectallofthestartpointandendpointfromtheoriginalbarcodeimage,Therebypositioningthesymbolcharacterofbarcodeimage。Thealgorithmthisarticletakenhashighaccuracyandlow-sensitivitytobothbarcodequalityandimageAcquisitionFacility,inthesameexperimentalcondition,canextractthe2-Dbarcodeaccurately。

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