CN109726789A - Hide the anti-fake two-dimension code of digital signature - Google Patents
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- CN109726789A CN109726789A CN201811569099.1A CN201811569099A CN109726789A CN 109726789 A CN109726789 A CN 109726789A CN 201811569099 A CN201811569099 A CN 201811569099A CN 109726789 A CN109726789 A CN 109726789A
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- 238000000034 method Methods 0.000 abstract description 9
- 238000002372 labelling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 1
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Abstract
A kind of anti-fake two-dimension code of hiding digital signature, the anti-fake two-dimension code passes through metamerism matching algorithm, halftone screen and Information Hiding Techniques, digital signature image is implanted in a width plain code image in 2 D code, generate a kind of special image in 2 D code containing digital signature, the image in 2 D code can read the information of plain code image in 2 D code under visible light, digital signature image can then be shown under infrared light, pass through digital signature image, it can be used to characterize whether printed matter is certified products, if personation replicates this two dimensional code, because it loses the color characteristics of metamerism, digital signature image will be lost, therefore it can identify marking label with this characteristic, bill, the brushes product such as marketable securities are with the presence or absence of personation infringement problem.
Description
Technical field:
The present invention relates to a kind of anti-counterfeiting printing technology, especially a kind of anti-fake two-dimension code of hiding digital signature can be used for each
Plant the anti-fake of printed matter.
Background technique:
Method for anti-counterfeit relatively common at present has following several: the first is laser anti-false sign, with laser recessiveness ink fluorescent
The symbol of product or special identification icon are printed to the anti-fake label of product by ink-printing techniques, and same class product uses
Same labeling, because anti-fake label is easier to forge, and the anti-fake label forged is used on fake products, causes product
It is true and false to obscure, it is accordingly difficult to effectively anti-fake.Second is cipher counterfeit-proof labeling, and used method is that every product compiles one group
The coding of number, every product is different from, this number is printed on labeling and is covered, while can by this number deposit
For when consumer buys product, the number in mark is passed through phone or the meter that networks in the Computer Database of consumer query
Digital entering computer database in mark is compared identification by calculation machine, and identical is true, difference as vacation, method letter
Single, identification is easy, and is not easy to forge, but in actual use, prints labeling after generating because coded data is that computer is unified.It represents
The true and false coded data of product may be illegally duplicated fraud, meanwhile, the coding that coding also can be recycled on the product that do not inquire makes mark
And be attached on false pain product, antifalse effect it is difficult to ensure that.The third is texture anti-fake, anti-fake with the textural characteristics on its labeling, though
Right more difficult forgery, but the serial number due to being only marked with patch, and be plain code, every piece of mark can be inquired repeatedly, and fake producer can pass through warehouse
Phenomenon is copied the presence or absence of in the necessary textural characteristics i.e. grid reflected when administrator or shop-assistant are by serial number and inquiry on labeling
It is forged after attacking by this feature batch.4th kind is that metameric ink is anti-fake, and anti-fake metameric ink is based on metamerism
Identical color is presented using two kinds of substances in the anti-counterfeiting printing technology of phenomenon under a kind of light source, but under another light source,
But the phenomenon that presentation different colours, is realized anti-fake, but the ratio of metamerism is easier to measure, therefore antifalse effect is also difficult to
Guarantee.
In conclusion existing method for anti-counterfeit all has some disadvantages, thus cannot be from preventing fake products at all.
Summary of the invention:
In order to overcome existing various printed matter anti-counterfeiting printing technologies there are the shortcomings that, the present invention is anti-for existing printed matter
Deficiency existing for pseudo- printing technology improves the prior art, proposes a kind of anti-fake two-dimension code of hiding digital signature,
Digital signature image is implanted by the anti-fake two-dimension code by metamerism matching algorithm, halftone screen and Information Hiding Techniques
Into a width plain code image in 2 D code, a kind of special image in 2 D code containing digital signature is generated, the image in 2 D code is can
The light-exposed lower information that can read plain code image in 2 D code, can then show digital signature image under infrared light, be signed by number
Name image can be used to characterize whether printed matter is certified products, if personation replicates this two dimensional code, because it loses metamerism
Color characteristics, digital signature image will be lost, therefore can identify the brush such as marking label, bill, marketable securities with this characteristic
Product are with the presence or absence of personation infringement problem.
The yellow black four kinds of colors of green product are generally described with CMYK, and metamerism typically refers to tetra- color ink of CMYK of colored printing
Form one group of ratio match matches color ink, and the ink is under visible light it is seen that identical color, i.e., homochromy；And infrared
Under light, because tetra- color ink of CMYK match different generation chromatography differences, i.e., different spectrum, which can show different colors, this
Kind phenomenon is referred to as metamerism phenomenon.
The technical solution adopted by the present invention to solve the technical problems is: a width image in 2 D code is made of plain code information,
Referred to as plain code image in 2 D code is converted into binary code stream information by digital signature information, forms a width digital signature image, be
By digital signature image concealing in plain code image in 2 D code, we are completely heavy by digital signature image and plain code image in 2 D code
Folded is printed on the same position of the page, and the color lump of digital signature image and plain code image in 2 D code is corresponded
Coincide together, the site for corresponding coincidence can be divided into four classes, and first kind color lump plain code image in 2 D code is required can
Show white under light-exposed and digital signature image request also shows white, the second class color lump plain code two dimensional code figure under infrared light
Picture requires to show black under visible light and digital signature image request shows white, third class color lump plain code under infrared light
Image in 2 D code requires to show white under visible light and digital signature image request shows black, the 4th class under infrared light
Color lump plain code image in 2 D code requires to show black under visible light and digital signature image request also shows under infrared light
Black,
Using tetra- color ink of CMYK, generate by tetra- member ink sets of CMYK at four groups of ratio match match color ink, first assembles
Four color ink ratios of color ink are C1M1Y1K1, and by ratio color matching make first assemble color ink under visible light with it is red
All show white under outer light, the second four color ink ratios for assembling color ink are C2M2Y2K2, and make second by ratio color matching
It assembles color ink and shows black under visible light, white is shown under infrared light, third assembles four color ink ratios of color ink
For C3M3Y3K3, and so that third is assembled color ink by ratio color matching and show white under visible light, show under infrared light black
Color, the 4th four color ink ratios for assembling color ink are C4M4Y4K4, and make the 4th to assemble color ink can by ratio color matching
All show black under light-exposed lower and infrared light,
Using the color lump of the black and white color lump modulation plain code image in 2 D code of digital signature image, for digital signature image and plain code
Image in 2 D code assembles color ink printing using first with the correspondence color lump for requiring to show white under infrared light under visible light,
Plain code image in 2 D code needs to show under visible light black and digital signature image needs to show under infrared light pair of white
Color lump is answered to assemble color ink printing using second, plain code image in 2 D code needs to show under visible light white and digital signature map
Correspondence color lump as needing to show black under infrared light assembles color ink printing, digital signature image and plain code two using third
Dimension code image assembles color ink printing using the 4th with the correspondence color lump for requiring to show black under infrared light under visible light, will
Digital signature image is implanted to special image in 2 D code of the generation containing digital signature image in plain code image in 2 D code,
Show plain code image in 2 D code under visible light in the region of digital signature image and the overlapping printing of plain code image in 2 D code,
And can scan and read plain code image in 2 D code information, digital signature image is shown under infrared light, is believed by digital signature image
Breath can be used to characterize whether printed matter is certified products, if personation replicates this two dimensional code, because it loses the color of metamerism
Characteristic, digital signature image will be lost, therefore can identify the brushes product such as marking label, bill, marketable securities with this characteristic and be
It is no to there are problems that palming off infringement.
Detailed description of the invention
The following further describes the present invention with reference to the drawings.
Fig. 1 hides the generation block diagram of the anti-fake two-dimension code of digital signature.
Fig. 2 hides the identification block diagram of the anti-fake two-dimension code of digital signature.
Fig. 3 hides the genuine/counterfeit discriminating block diagram of the anti-fake two-dimension code of digital signature.
Fig. 4 hides the anti-fake two-dimension code color modulation product process figure of digital signature.
Fig. 5 plain code image in 2 D code Local map corresponding with digital signature image.
Specific embodiment
In Fig. 1 Fig. 4 and Fig. 5, a width image in 2 D code, referred to as plain code image in 2 D code are made of plain code information, by counting
Word signing messages is converted into binary code stream information, forms a width digital signature image, for by digital signature image concealing bright
In code image in 2 D code, our same positions for being printed on the page that digital signature image and plain code image in 2 D code is completely overlapped
It sets, and digital signature image and the color lump of plain code image in 2 D code is coincided together correspondingly, correspond
The site of coincidence can be divided into four classes, and first kind color lump plain code image in 2 D code requires to show white and number under visible light
Signature image requires also to show white under infrared light, and the second class color lump plain code image in 2 D code requires to show under visible light black
Color and digital signature image request show white under infrared light, and third class color lump plain code image in 2 D code is required in visible light
Under show white and digital signature image request shows black under infrared light, the requirement of the 4th class color lump plain code image in 2 D code
Show black under visible light and digital signature image request also show black under infrared light,
Using tetra- color ink of CMYK, generate by tetra- member ink sets of CMYK at four groups of ratio match match color ink, first assembles
Four color ink ratios of color ink are C1M1Y1K1, and by ratio color matching make first assemble color ink under visible light with it is red
All show white under outer light, the second four color ink ratios for assembling color ink are C2M2Y2K2, and make second by ratio color matching
It assembles color ink and shows black under visible light, white is shown under infrared light, third assembles four color ink ratios of color ink
For C3M3Y3K3, and so that third is assembled color ink by ratio color matching and show white under visible light, show under infrared light black
Color, the 4th four color ink ratios for assembling color ink are C4M4Y4K4, and make the 4th to assemble color ink can by ratio color matching
All show black under light-exposed lower and infrared light,
Using the color lump of the black and white color lump modulation plain code image in 2 D code of digital signature image, for digital signature image and plain code
Image in 2 D code assembles color ink printing using first with the correspondence color lump for requiring to show white under infrared light under visible light,
Plain code image in 2 D code needs to show under visible light black and digital signature image needs to show under infrared light pair of white
Color lump is answered to assemble color ink printing using second, plain code image in 2 D code needs to show under visible light white and digital signature map
Correspondence color lump as needing to show black under infrared light assembles color ink printing, digital signature image and plain code two using third
Dimension code image assembles color ink printing using the 4th with the correspondence color lump for requiring to show black under infrared light under visible light, will
Digital signature image is implanted in plain code image in 2 D code, generates the special image in 2 D code containing digital signature image,
In figure 2 and figure 3, in the region of digital signature image and the overlapping printing of plain code image in 2 D code, show under visible light
Plain code image in 2 D code simultaneously can scan reading plain code image in 2 D code information, and digital signature image is shown under infrared light, is passed through
Digital signature image information can be used to characterize whether printed matter is certified products, if personation replicates this two dimensional code, because it loses
The color characteristics of metamerism, digital signature image will be lost, therefore can identify marking label with this characteristic, bill, have
The brushes product such as valence security are with the presence or absence of personation infringement problem.
Claims (1)
1. a kind of anti-fake two-dimension code of hiding digital signature, it is characterized in that: being made of a width image in 2 D code plain code information, referred to as
Plain code image in 2 D code is converted into binary code stream information by digital signature information, a width digital signature image is formed, for that will count
Word signature image is hidden in plain code image in 2 D code, we are completely overlapped by digital signature image and plain code image in 2 D code
It is printed on the same position of the page, and digital signature image and the color lump of plain code image in 2 D code is weighed correspondingly
It is combined, the site for corresponding coincidence can be divided into four classes, and first kind color lump plain code image in 2 D code is required in visible light
Under show white and digital signature image request also show white under infrared light, the second class color lump plain code image in 2 D code is wanted
It asks and shows black under visible light and digital signature image request shows white under infrared light, third class color lump plain code two dimension
Code image request shows white under visible light and digital signature image request shows black, the 4th class color lump under infrared light
Plain code image in 2 D code requires to show black under visible light and digital signature image request also shows black under infrared light,
Using tetra- color ink of CMYK, generate by tetra- member ink sets of CMYK at four groups of ratio match match color ink, first assembles
Four color ink ratios of color ink are C1M1Y1K1, and by ratio color matching make first assemble color ink under visible light with it is red
All show white under outer light, the second four color ink ratios for assembling color ink are C2M2Y2K2, and make second by ratio color matching
It assembles color ink and shows black under visible light, white is shown under infrared light, third assembles four color ink ratios of color ink
For C3M3Y3K3, and so that third is assembled color ink by ratio color matching and show white under visible light, show under infrared light black
Color, the 4th four color ink ratios for assembling color ink are C4M4Y4K4, and make the 4th to assemble color ink can by ratio color matching
All show black under light-exposed lower and infrared light,
Using the color lump of the black and white color lump modulation plain code image in 2 D code of digital signature image, for digital signature image and plain code
Image in 2 D code assembles color ink printing using first with the correspondence color lump for requiring to show white under infrared light under visible light,
Plain code image in 2 D code needs to show under visible light black and digital signature image needs to show under infrared light pair of white
Color lump is answered to assemble color ink printing using second, plain code image in 2 D code needs to show under visible light white and digital signature map
Correspondence color lump as needing to show black under infrared light assembles color ink printing, digital signature image and plain code two using third
Dimension code image assembles color ink printing using the 4th with the correspondence color lump for requiring to show black under infrared light under visible light, will
Digital signature image is implanted to special image in 2 D code of the generation containing digital signature image in plain code image in 2 D code,
Show plain code image in 2 D code under visible light in the region of digital signature image and the overlapping printing of plain code image in 2 D code,
And can scan and read plain code image in 2 D code information, digital signature image is shown under infrared light, is believed by digital signature image
Breath can be used to characterize whether printed matter is certified products, if personation replicates this two dimensional code, because it loses the color of metamerism
Characteristic, digital signature image will be lost, therefore can identify the brushes product such as marking label, bill, marketable securities with this characteristic and be
It is no to there are problems that palming off infringement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569099.1A CN109726789B (en) | 2018-12-21 | 2018-12-21 | Anti-fake two-dimensional code with hidden digital signature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811569099.1A CN109726789B (en) | 2018-12-21 | 2018-12-21 | Anti-fake two-dimensional code with hidden digital signature |
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| CN109726789A true CN109726789A (en) | 2019-05-07 |
| CN109726789B CN109726789B (en) | 2023-06-27 |
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Effective date of registration: 20231227 Address after: 702, Rufeng Building, No. 573 Bulong Road, Ma'antang Community, Bantian Street, Longgang District, Shenzhen City, Guangdong Province, 518129 Patentee after: Shenzhen Wudi Technology Group Co.,Ltd. Address before: 102600 Beijing Institute of Graphic Communication, 25 Xinghua North Road, Daxing District, Beijing Patentee before: BEIJING INSTITUTE OF GRAPHIC COMMUNICATION |