文档介绍：食品溯源系统编码自动生成
食品溯源系统编码自动生成
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食品溯源系统编码自动生成
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食品溯源系统编码自动生成
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食品溯源系统编码自动生成
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食品溯源系统编码的自动生成
1 2FoodTraceabilitySystemAutomatically
GeneratesCodeABSTRACTAsthemosteconomicalandpractical
automatic
identification
technology
up
to
now，bar
code
technologywasproposedintheearly1970s
，whichhasbeen
widelyusedin
manydifferent
fields
．In
order
to
satisfy
the
requirementofexpressingmoretypesandgreaterinformation
capacityinthelimitedarea
，twosdimensionalbarcodecame
into
being，whichcanmakeuptheinadequacyof
onesdimension
barcodeinexpressing
information
．Thestudy
of2-dimensional
barcodeabroadwasfar
earlier
than
the
domesticone，so
they
havepossessedmanykindsof
codecore
technology
suchasPDF4
17、QRcode、Code49，etc．Onthecontrary
，only
fewdomestic
companieshaveownedournational
intellectual
property
rights
of
twodimensional
barcode.
Thekey
and
difficult
part
of
two-dimensionalbarcodetechnologyisthedistinguishingof
the
barcode．Becauseof
its
characteristics
such
as
big
食品溯源系统编码自动生成
食品溯源系统编码自动生成
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食品溯源系统编码自动生成
capacity,highdensity,strongerrorcorrectingabilityand
highsecurity
int