二維條形碼pdf417識別及其單片機實現(xiàn)

1、北京交通大學碩士學位論文二維條形碼PDF417識別及其單片機實現(xiàn)姓名：賀力申請學位級別：碩士專業(yè)：電路與系統(tǒng)指導教師：郝曉莉20071201韭塞鑾通太堂亟堂焦論塞ABSTRACT：Twodimensionalbarcoderecogmtionisthem巧orresearchofComputerAutomaticIdentificationTechnologynowadaysImagebasedbarcodereadersareoneo

2、fthefocusesofresearchBecausethecomputationsof2Dbafcodem：ogaitionc舶rrcntrcade巧u∞CCDomneraandhighperformanceembeddedprocesserordi垂talsi粵lalprocessertoconsullctrecognitionsystemTIlisthesisdescribedalowcost2Dbarcoderecogniti

3、onsystemusingmicrocontrollerThiSsystemisbased011eCOGIXMCUusingOV7760CMOScamerawhichisadesignedforsafetyandimagerecognitiontosamplebarcodeimage，combinedwithhighspeedSDRAMandexterIlalflashThissystemrealizedefficientrequisi

4、tionofbarcodedataandrealtimeprocossin呂PDF417barcoderecognitionalgorithmhasbeenrelativelymatureit’SstillahotresearchpointbutadoptcdbydifferenthardwareplatformsConsidersysteminthispaperusingratherslowMCU，inordertoaGhi刪ethe

5、realtimeprocessingofbarcodes，improvingthespeedandatthenleantimemaintainthestabilityofalgorithmbocomecrucialOnthebaseofcurtoatrecognitionalgorithmthisarticleintroducedamethodoffastlocatingthetransitionbetweentheelementsof

6、barcodcgreatlyreducedtheamountofbareoderecognitioncomputationAfterindepthstudyingofPDF417scanningalgorithmthethesiscreatedadaptivescanningalgorithmeahaacedtheutilizationrateofimagedataForthecodematrixinitializationalsoin

7、血oducedasimptifiodinitializationalgorithmwhichfurtherenhancedtherecognitionspeedFinallythissystemhasbcefIsuccessfullycompletedTherealizedsystembasedonMCUmaintainedagoodr∞ogaitionratcandrecognitionspeed。This2Dbarcoderecog