PDF417譯碼研究.pdf

1、北京機械工業(yè)學院碩士學位論文PDF417譯碼研究姓名：王銘宇申請學位級別：碩士專業(yè)：計算機應(yīng)用技術(shù)指導教師：佟俐鵑20070101AbstractABSTRACTWiththedevelopmentofcomputertechnologyautomaticidentificationtechnologieshavebeenwidelyapplied，amongwhichbarcodehasbeentheleadingoneRecogni

2、tiontechnologyandencodingtheoryaretwohotspotsinbarcodetechnologyInordertosolvetheproblemoflimitedinformationcapacityofbarcode，anewtypeofbarcode，twodimensionalbarcode，hasbeendevelopedInforeigncountries，2Dbarcodestechnolog

3、yhavealreadybeenappliedinmanyfields，andtheyhaveproduced2DbarcodeidentifysystemingoodpropertyInChina，thistechnologyisjustinresearchphase，SOwehavedroppedbehindgreatlyTherefore，ourresearchfocusonautoidentifyofPDF417，namelyt

4、heresearchofdecodingarithmeticOne—offcollectingofbarcodeimagebytakingpictureavoidtheproblemsthatproducedbylinearscanner。So，unlikelytOtraditionaldecodingprocess，weadoptthemethodbasedonamodeofimage，thatistOsaytheimageofbar

5、codecollectedbythecameraisdecodedthoughthearithmeticprocessThedecodingarithmeticmainlyhavetwoparts，thefirstpartistOpretreatmenttheimagecollected，namelythereformofimageThiswillgroundforthecorrectdecodingafterwardsThesecon

6、dpartistodecodethebarcodeimageafterpretreatmentinordertoobtainlastresultthatthebarcoderepresentsTheimagedisposeandidentificationprocesstransformsthedigitalinformationintobarcodecode，andthedecodeprogramdecodesPDF417barcod

7、ewithdecodealgorithmanddisplaysthedecoderesultAccordingtOtheresultoftheexperiments，thisdecodingarithmeticisabletoimplementtodecodethePDF417barcodecorrectlyanditmeetsthebasicallytechnicalrequirementKeyWords：PDF417barcode；