BarCodeTechnologyanditsapplicationDataMatrix碼解析與應(yīng)用DataMatrixCodeParsingandApplicationDataMatrixCodeStructureDataMatrix碼（ECC200）類型包括長(zhǎng)方形與正方形兩種，單元數(shù)必須是偶數(shù)。舊版的DataMatrix碼包括ECC000、ECC050、ECC080、ECC100和ECC140。ECC200是最新的DataMatrix碼版本，可以配置為正方形或矩形。它們是由使用卷積糾正的范圍從9×9到49×49的奇數(shù)模塊組成的。TheDataMatrixcode(ECC200)canberectangularorsquare,andthenumberofunitsmustbeeven.TheDataMatrixcodeofthepreviousversionsincludesECC000,ECC050,ECC080,ECC100,andECC140.ECC200isthelatestversionandcanbeconfiguredasasquareorrectangle.Theyarecomposedofoddmoduleswitharangefrom9×9to49×49usingconvolutioncorrection.DataMatrixCodeStructure舊版本（ECC000、ECC050、ECC080、ECC100和ECC140）與新版本（ECC200）之間的差別在于每側(cè)的模塊數(shù)目。舊版本的模塊為基數(shù)，而新版本的模塊為偶數(shù)。Thedifferencebetweenthepreviousversions(ECC000,ECC050,ECC080,ECC100,andECC140)andthenewversion(ECC200)liesinthenumberofmodulesoneachside.Themodulesofolderversionsareodd,whilethemodulesofthenewversionareeven.DataMatrixCodeStructure(ECC200)DataMatrix碼的數(shù)據(jù)區(qū)域四周為L(zhǎng)形框（稱為“對(duì)準(zhǔn)圖案”）和點(diǎn)線（稱為“時(shí)鐘圖案”）。讀取器將捕獲這些圖案，通過圖像處理技術(shù)確定代碼的位置。因此，可從各個(gè)方向上讀取DataMatrix碼。當(dāng)模塊數(shù)目超過24×24時(shí)，代碼將分成區(qū)塊，每側(cè)不會(huì)超過24個(gè)模塊。此結(jié)構(gòu)可防止代碼失真。ThedataareaofDataMatrixcodeissurroundedbyaL-shapedbox(called"alignmentpattern")anddottedlines(called"clockpattern").Thereadercapturesthesepatternsandusesimageprocessingtechniquestolocatethecode.Therefore,theDataMatrixcodecanbereadinalldirections.Whenthenumberofmodulesexceeds24x24,thecodeisdividedintoblockswithnomorethan24modulesoneachside.Thisstructurepreventscodedistortion.DataMatrixCodeStructure(ECC200)共有24種代碼尺寸，范圍為從10×10模塊到144×144模塊（對(duì)于矩形，共有六種尺寸）。當(dāng)某個(gè)代碼的模塊數(shù)目超過26×26（對(duì)于數(shù)據(jù)，模塊數(shù)目超過24×24）時(shí)，它會(huì)劃分為區(qū)塊，如下所示，每側(cè)不超過24個(gè)模塊。此結(jié)構(gòu)可防止代碼失真。Thereare24codesizes,rangingfrom10×10modulesto144×144modules(sixsizesforrectangles).Whenacodehasmorethan26×26modules(ormorethan24×24modulesfordata),itisdividedintoblocks,asshownbelow,withnomorethan24modulesoneachside.Thisstructurepreventscodedistortion.DataMatrix碼四周的邊距應(yīng)大于模塊。ThemarginsaroundtheDataMatrixcodeshouldbelargerthanthemodule.ErrorCorrectingCode(Reed-SolomonCode)當(dāng)部分DataMatrix碼損壞時(shí)，Reed-Solomon碼會(huì)恢復(fù)數(shù)據(jù)。注意：在DataMatrix碼中，糾錯(cuò)率由符號(hào)尺寸和數(shù)據(jù)容量自動(dòng)確定。與QR碼不同，它不可隨意指定。WhenpartoftheDataMatrixcodeiscorrupted,theReed-Solomoncoderestoresthedata.Note:InDataMatrixcode,theerrorcorrectionrateisautomaticallydeterminedbysymbolsizeanddatacapacity.UnlikeQRcodes,theycannotbearbitrarilyspecified.GS1DataMatrixGS1DataMatrix是一種由GS1標(biāo)準(zhǔn)化以便分發(fā)的二維碼符號(hào)。它以ECC200標(biāo)準(zhǔn)為基礎(chǔ)，定義了下列規(guī)則以便與傳統(tǒng)的DataMatrix碼區(qū)分開來。GS1DataMatrixisatwo-dimensionalcodesymbolstandardizedbyGS1fordistribution.BasedontheECC200standard,itdefinesthefollowingrulestodistinguishitfromtraditionalDataMatrixcodes.GS1DataMatrixGS1DataMatrix碼與GS1-128的數(shù)據(jù)結(jié)構(gòu)相同。因此，如果有必要處理大量數(shù)據(jù)，但是實(shí)際上印刷區(qū)域有限，則可能將使用GS1DataMatrix碼。此外，GS1DataMatrix碼將針對(duì)醫(yī)療行業(yè)進(jìn)行標(biāo)準(zhǔn)化。由于代碼將直接印刷在不銹鋼醫(yī)療器械（如手術(shù)刀和剪刀）上，因此制定了相關(guān)指導(dǎo)原則。GS1DataMatrixcodehasthesamedatastructureasGS1-128.Therefore,ifitisnecessarytoprocesslargeamountsofdata,buttheactualprintingspaceislimited,theGS1DataMatrixcodemaybeused.Inaddition,GS1DataMatrixcodeswillbestandardizedforthehealthcareindustry.Becausethecodewillbeprinteddirectlyonstainless-steelmedicaldevices,suchasscalpelsandscissors,guidelineshavebeendeveloped.微課作業(yè)MicroClassAssignments2022年1月4日揭陽全市首張“粵居碼”二維碼門牌上墻，對(duì)于二維條碼技術(shù)的創(chuàng)新應(yīng)用，你有什么想法嗎？OnJanuary4,2022,JieyangCity'sfirst"YuejuCode",atwo-dimensiona