2D bar code(2-dimensional bar code) sau cov ntaub ntawv cim cov ntaub ntawv siv cov duab dub-thiab-dawb muab faib rau hauv ib lub dav hlau (ob-dimensional kev taw qhia) raws li qee cov cai hauv cov duab geometry. Hauv kev sau cov lej, cov ntsiab lus ntawm ' 0 ' thiab ' 1 ' me ntsis kwj, uas yog lub hauv paus ntawm lub hauv paus ntawm lub computer, yog siv cleverly. Ob peb daim duab geometric sib xws rau binary yog siv los sawv cev cov ntaub ntawv xov xwm ntawm cov ntawv nyeem, thiab cov ntaub ntawv tau ua tiav qhov kev nyeem ntawv tsis siv neeg ntawm cov duab input ntaus ntawv lossis cov cuab yeej photoelectric scanning. Nws muaj qee tus yam ntxwv ntawm kev siv tshuab bar code: txhua tus lej muaj nws tus kheej tshwj xeeb teeb. Txhua tus cim muaj qhov dav dav. Nws muaj qee yam pov thawj muaj nuj nqi. Nyob rau tib lub sijhawm, nws kuj muaj cov haujlwm ntawm kev lees paub tsis siv neeg ntawm cov kab sib txawv ntawm cov ntaub ntawv thiab ua cov duab hloov pauv hloov cov ntsiab lus.
2D code yog hom ntawv bar code ntau dua li 1d code. 1d code tsuas tuaj yeem qhia cov ntaub ntawv hauv ib qho kev taw qhia (feem ntau kab rov tav kev taw qhia), thaum 2d code tuaj yeem khaws cov ntaub ntawv hauv ob qho tib si kab rov tav thiab ntsug. 1d code tsuas yog tsim los ntawm cov lej thiab cov tsiaj ntawv, thaum 2d code tuaj yeem khaws cov ntaub ntawv xws li cov cim Suav, cov lej thiab cov duab, yog li daim ntawv thov teb ntawm 2d code yog dav dua.
Raws li lub hauv paus ntsiab lus ntawm 2d code, ob-dimensional code yuav muab faib ua ob pawg: matrix 2d code thiab stacked / kab 2d code.
Matrix 2d code Matrix 2d code, tseem hu ua chessboard 2d code, yog encoded nyob rau hauv ib tug duab plaub qhov chaw los ntawm txawv distributions ntawm dub thiab dawb pixels nyob rau hauv lub matrix. Hauv cov ntsiab lus sib thooj ntawm lub matrix, binary '1' yog sawv cev los ntawm cov tsos ntawm cov ntsiab lus (cov ntsiab lus square, voj voog cov ntsiab lus lossis lwm cov duab), thiab cov binary '0' tsis sawv cev los ntawm qhov pom ntawm cov ntsiab lus. Lub permutation thiab ua ke ntawm cov ntsiab lus txiav txim lub ntsiab lus sawv cev los ntawm lub matrix 2d barcode. Matrix 2d bar code yog hom tshiab ntawm cov cim tsis siv neeg kos duab pom thiab ua cov txheej txheem raws li kev siv computer duab ua tshuab thiab ua ke coding txoj cai. Tus sawv cev matrix 2d barcodes yog QR Code, Data Matrix, MaxiCode, Han Xin Code, Grid Matrix, thiab lwm yam.
QR Code
QR Code yog Quick Response Code ceev teb matrix code, tseem hu ua Denso QR Code. Nws yog ib tug matrix 2d bar code standardized los ntawm thoob ntiaj teb cov koom haum, uas yog thawj zaug tsim los ntawm Denso, Nyiv, nyob rau hauv lub Cuaj Hli Ntuj 1994. Suav lub teb chaws tus qauv hu nws lub ceev teb matrix code. Ntxiv nrog rau cov yam ntxwv ntawm 1d bar code, nws kuj muaj qhov zoo ntawm cov ntaub ntawv loj, muaj kev ntseeg siab, kev ua haujlwm me me, ua haujlwm zoo ntawm ntau cov ntaub ntawv, txhawb 360 ° arbitrary kev taw qhia code nyeem, qee yam kev ua yuam kev muaj peev xwm, thiab muaj zog tsis pub lwm tus paub. thiab tiv thaiv cuav. Txhawb ASCII cim thiab dav ASCII cim.
Micro QR yog 2d coding txoj kev tshiab uas tau npaj tseg hauv ISO: 2006 daim ntawv, zoo ib yam li QR. Txawm li cas los xij, piv nrog QR 2d code, Micro QR muaj cov yam ntxwv hauv qab no: tsuas yog ib qho kev tshawb nrhiav pom, thiab qhov ntim me dua.
Cov ntaub ntawv Matrix
Cov ntaub ntawv Matrix, lub npe hu ua Data code, tau tsim los ntawm International Data Matrix (ID Matrix) hauv xyoo 1989. Cov ntaub ntawv Matrix tuaj yeem muab faib ua ECC000-140 thiab ECC200, ECC200 feem ntau siv. Cov ntaub ntawv Matrix txhawb ASCII cov cim thiab dav ASCII cov cim. feem ntau yog siv rau me me ntim khoom serial tooj txheeb xyuas.
Daim phiaj Matrix
Grid Matrix, hu ua GM code, yog square 2d code. Daim duab kos yog tsim los ntawm square macro modules, thiab txhua qhov macro module yog tsim los ntawm 6 × 6 square units.
Stacked / kab 2d code
Lub stacking / kab-parallel 2d bar code tseem hu ua stacking 2d bar code los yog txheej-parallel 2d bar code. Nws txoj cai coding yog raws li 1d bar code, uas tau muab tso rau hauv ob lossis ntau kab raws li xav tau. Nws txais ib co yam ntxwv ntawm 1d bar code hauv coding tsim, pov thawj txoj cai thiab nyeem hom. Cov khoom siv nyeem ntawv yog sib xws nrog bar code luam ntawv thiab 1d bar code tshuab. Txawm li cas los xij, vim qhov nce ntawm cov kab, nws yog ib qho tsim nyog los txiav txim cov kab, thiab kev txiav txim siab algorithm tsis zoo ib yam li cov software. Tus neeg sawv cev kab hom 2d bar code: PDF417 (feem ntau siv), Micro PDF417, Code 16K, CODABLOCK F, Code 49, thiab lwm yam.
ib 417
PDF417 yog tam sim no siv ntau tshaj plaws stacked 2d code. Lub bar code yog ib yam ntawm high density bar code, nyob rau hauv tib cheeb tsam tshaj li qhov dog dig 2d code tuaj yeem ua raws li cov ntaub ntawv ntau ntxiv. Siv dav hauv daim pib rho npe, daim pib dav hlau, ID nyeem ntawv scenes.
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Post lub sij hawm: Nov-22-2022