2D bar code( 2-dimensional bar code ) yana yin rikodin bayanan alamar bayanai ta amfani da zane-zane na baki da fari da aka rarraba a cikin jirgin sama (hanyoyi masu girma biyu) bisa ga wasu dokoki a cikin lissafin da aka ba.A cikin tarin lambar, ana amfani da dabarun '0' da '1' rafukan rafukan rafuka, waɗanda suka zama tushen dabaru na ciki na kwamfutar, cikin wayo.Ana amfani da sifofin geometric da yawa masu dacewa da binary don wakiltar bayanin lamba na rubutu, kuma ana sarrafa bayanin ta atomatik karanta na'urar shigar da hoto ko na'urar daukar hoto ta hoto.Yana da wasu halaye gama-gari na fasahar lambar mashaya: kowace lamba tana da takamaiman saitin halayen sa.Kowane hali yana da takamaiman faɗin.Yana da takamaiman aikin tabbatarwa.A lokaci guda kuma, yana da aikin tantancewa ta atomatik na layuka daban-daban na bayanai da sarrafa wuraren jujjuyawar hoto.
Lambar 2D shine mafi girman tsarin lambar bar fiye da lambar 1d.Lambar 1d kawai tana iya bayyana bayanai a hanya ɗaya (gaba ɗaya a kwance shugabanci), yayin da lambar 2d zata iya adana bayanai a cikin kwatancen kwance da a tsaye.Lambar 1d tana iya haɗawa da lambobi da haruffa kawai, yayin da lambar 2d za ta iya adana bayanai kamar haruffan Sinanci, lambobi da hotuna, don haka filin aikace-aikacen 2d code ya fi fadi.
Dangane da ka'idar lambar 2d, lambar mai girma biyu za a iya kasu kashi biyu: lambar matrix 2d da stacked / jere 2d code.
Matrix 2d code Matrix 2d code, wanda kuma aka sani da lambar chessboard 2d, an sanya shi a cikin sarari mai rectangular ta rarraba nau'ikan pixels baƙi da fari a cikin matrix.A cikin madaidaicin matsayi na matrix, binary' 1' yana wakilta ta bayyanar maki ( maki murabba'i, maki madauwari ko wasu siffofi ), kuma binary '0' baya wakilta ta bayyanar maki.Ƙaƙƙarfan ƙira da haɗin maki sun ƙayyade ma'anar da matrix 2d barcode ke wakilta.Matrix 2d lambar mashaya sabon nau'in ganowa ta atomatik mai hoto mai hoto da tsarin lambar sarrafawa bisa fasahar sarrafa hoton kwamfuta da haɗakar ƙa'idar coding.Wakilan matrix 2d barcodes sune QR Code, Data Matrix, MaxiCode, Han Xin Code, Grid Matrix, da sauransu.
Lambar QR
Lambar QR ita ce lambar amsawa ga sauri lambar matrix code, kuma aka sani da lambar Denso QR.Lamba ce ta matrix 2d wacce kungiyoyin kasa da kasa suka daidaita, wanda Denso na kasar Japan suka fara kirkiro shi a watan Satumba na shekarar 1994. Ma'aunin kasa na kasar Sin ya kira shi lambar matrix mai saurin amsawa.Baya ga halaye na lambar mashaya 1d, Hakanan yana da fa'idodi na babban ƙarfin bayanai, babban abin dogaro, ƙaramin sarari, aiki mai inganci na bayanan rubutu daban-daban, tallafawa karatun lambar jagora na 360 ° na sabani, wasu ikon gyara kuskure, da sirri mai ƙarfi. da kuma hana jabu.Goyi bayan haruffa ASCII da manyan haruffa ASCII.
Micro QR sabuwar hanyar coding ce ta 2d da aka gabatar a cikin ISO: takaddar 2006, mai kama da QR.Koyaya, idan aka kwatanta da lambar QR 2d, Micro QR yana da halaye masu zuwa: alamar bincike guda ɗaya kawai ake buƙata, kuma ƙarar ta kasance ƙarami.
Data Matrix
Data Matrix, asali mai suna Data code, an ƙirƙira ta International Data Matrix (ID Matrix) a 1989. Data Matrix za a iya raba zuwa ECC000-140 da ECC200, ECC200 da aka fi amfani.Matrix Data yana goyan bayan haruffa ASCII da manyan haruffa ASCII.ana amfani da shi gabaɗaya don ƙaramin ƙarar samfurin tantance lambar serial number.
Grid Matrix
Grid Matrix, wanda ake magana da shi azaman lambar GM, lambar murabba'in 2d ce.Zane-zanen lambar ya ƙunshi nau'ikan macro masu murabba'in murabba'ai, kuma kowane macro module ɗin ya ƙunshi raka'a murabba'i 6 × 6.
Matsala / layi 2d code
Har ila yau ana kiran lambar mashaya stacking / jere-parallel 2d bar code ko lambar mashaya-parallel 2d.Ƙa'idar coding ta dogara ne akan lambar mashaya 1d, wanda aka jera shi cikin layuka biyu ko fiye kamar yadda ake buƙata.Ya gaji wasu halaye na lambar mashaya 1d a ƙirar ƙira, ƙa'idar tabbatarwa da yanayin karatu.Kayan aikin karatu sun dace da bugu na lambar mashaya da fasahar lambar bar 1d.Duk da haka, saboda karuwar adadin layuka, wajibi ne don ƙayyade layuka, kuma ƙaddamar da algorithm ba daidai ba ne da software.Nau'in layi na wakilci na lambar mashaya 2d: PDF417 (wanda aka saba amfani dashi), Micro PDF417, Code 16K, CODABLOCK F, Code 49, da sauransu.
PDF 417
PDF417 a halin yanzu ita ce lambar 2d da aka fi amfani da ita.Lambar bar wani nau'i ne na babban lambar mashaya, a cikin yanki guda fiye da lambar 2d na yau da kullun na iya ɗaukar ƙarin bayani.An yi amfani da shi sosai a tikitin caca, tikitin iska, wuraren karatun ID.
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