CN102945452A - Double-variant one-dimensional progressive encryption binary anti-counterfeiting printing method - Google Patents

Double-variant one-dimensional progressive encryption binary anti-counterfeiting printing method Download PDF

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CN102945452A
CN102945452A CN2012104028007A CN201210402800A CN102945452A CN 102945452 A CN102945452 A CN 102945452A CN 2012104028007 A CN2012104028007 A CN 2012104028007A CN 201210402800 A CN201210402800 A CN 201210402800A CN 102945452 A CN102945452 A CN 102945452A
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binary
group
counterfeiting information
control variables
operator control
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CN102945452B (en
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张立君
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Beijing Institute of Graphic Communication
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Beijing Institute of Graphic Communication
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Abstract

The invention discloses a double-variant one-dimensional progressive encryption binary anti-counterfeiting printing method which comprises the following steps: performing [+++] encrypting operation and channel encoding to binary anti-counterfeiting information to generate a binary modulating signal, and adopting a modulation mode of a looped look-up table method to embed the anti-counterfeiting information into the whole page through sequential change in a shape of amplitude-modulated dot. Therefore, the anti-counterfeiting information can be recognized from any fragment during presswork recognition. The method can be widely applied to the anti-counterfeiting field of presswork.

Description

The bivariate one dimension goes forward one by one and encrypts the scale-of-two antiforging printing method
affiliated technical field:
The present invention relates to a kind of anti-counterfeiting printing technology, particularly a kind of bivariate one dimension goes forward one by one and encrypts the scale-of-two anti-counterfeiting printing technology, and what this anti-counterfeiting printing technology can be for various printed matters is false proof.
background technology:
Existing comparatively common method for anti-counterfeit has following several: the first is laser anti-false sign, the symbol of product or special identification icon are printed to the anti-fake label of product by the recessive printing ink daylight fluorescence ink of laser printing technology, and the same class product is used the same labeling, because anti-fake label is easier to forge, and the anti-fake label of forging is used on fake products, cause the true and false of product to obscure, therefore be difficult to effectively false proof.The second is the cipher counterfeit-proof labeling, its method adopted is that every product is compiled one group of number, the coding of every product is not identical, this number is printed on labeling and hides, this number is deposited in the Computer Database that can inquire about for the consumer simultaneously, when the consumer buys product, number on sign is compared to identification by phone or networking computer input Computer Database, identical being very, difference is vacation, method is simple, identification easily, be difficult for forging, but in actual the use, because coded data is the rear labeling of printing of the unified generation of computing machine.The true and false coded data of representative products may be faked by illegal copies, and simultaneously, the coding on the product of the also recyclable not inquiry of encoding is made mark and is attached on the false pain product, and antifalse effect is difficult to guarantee.The third is texture anti-fake, false proof with the textural characteristics on its labeling, although more difficult forgery, but due to a serial number of bidding subsides, and be plain code, every piece of labeling can be inquired about repeatedly, in the necessary textural characteristics grid that the fake producer can be by warehouseman or shop-assistant be reflected during by the sequence number on labeling and inquiry have or not phenomenon to plagiarize after by this feature, forge in batches.In sum, all there is certain shortcoming in existing method for anti-counterfeit, thereby can not be from prevent fake products at all.
summary of the invention:
The shortcoming existed in order to overcome existing various printed matter anti-counterfeiting printing technology, the deficiency that the present invention is directed to existing printed matter anti-counterfeiting printing technology existence is improved prior art, a kind of encryption counterfeit printing technology of shape of scale-of-two coded signal modulation printed matter amplitude has been proposed, this anti-counterfeiting printing technology is embedded in anti-counterfeiting information in full page by the change of the shape of amplitude, can when identifying, printed matter identify anti-counterfeiting information from any one fragment, therefore there is very strong crush resistance, can fundamentally stop to adopt and take a picture, scanning waits the bootlegging behavior.
The technical solution adopted for the present invention to solve the technical problems is: the amplitude in the flexographic printing hybrid screening and frequency-modulation halftone dot are separately processed, utilize image information, Word message, the anti-counterfeiting information such as trademark information generate the binary system anti-counterfeiting information table of 8 group, for preventing from ciphering process producing information spillover, 8 one group of binary messages in binary system anti-counterfeiting information table are expanded to 16 one group of binary messages, the generation most-significant byte is 0 16 one group binary system anti-counterfeiting information table entirely, 16 binary messages of i in 16 one group binary system anti-counterfeiting information table group are denoted as to N ii is greater than 0 positive integer, the eight-digit binary number encryption parameter is denoted as C, the positive integer that encryption parameter C is 0<=C<=256, two binary operator control variables are denoted as k, the positive integer that operator control variables k is 0<=k<=3, and eight control variables are denoted as j, the positive integer that control variables j is 0<=j<=256, operator
Figure 122947DEST_PATH_IMAGE001
adopt+, * ,-, tetra-kinds of operators of ÷, during operator control variables k=0
Figure 131354DEST_PATH_IMAGE001
be defined as respectively "+", " * ", "-", " ÷ " computing, during operator control variables k=1
Figure 184761DEST_PATH_IMAGE001
be defined as respectively "-", " * ", "+", " ÷ " computing, during operator control variables k=2 be defined as respectively "-", " ÷ ", "+", " * " computing, during operator control variables k=3
Figure 442884DEST_PATH_IMAGE001
be defined as respectively " ÷ ", "-", " * ", "+" computing, during operator control variables k=0 cryptographic calculation be defined as [
Figure 938587DEST_PATH_IMAGE002
+
Figure 467789DEST_PATH_IMAGE003
+
Figure 162075DEST_PATH_IMAGE004
+
Figure 16899DEST_PATH_IMAGE005
], during operator control variables k=1 cryptographic calculation be defined as [
Figure 796636DEST_PATH_IMAGE006
+
Figure 129528DEST_PATH_IMAGE007
+
Figure 943901DEST_PATH_IMAGE004
+
Figure 692327DEST_PATH_IMAGE005
], during operator control variables k=2 cryptographic calculation be defined as [
Figure 897044DEST_PATH_IMAGE006
+
Figure 95944DEST_PATH_IMAGE003
+
Figure 702506DEST_PATH_IMAGE008
+
Figure 695870DEST_PATH_IMAGE005
], during operator control variables k=3 cryptographic calculation be defined as [ +
Figure 62577DEST_PATH_IMAGE003
+
Figure 585962DEST_PATH_IMAGE004
+
Figure 953490DEST_PATH_IMAGE009
], the initial value of setting encryption parameter C, initial value j=0 and the k=0 of setting operator control variables j and k, set 16 binary message N in 16 one group binary system anti-counterfeiting information table iPosition Control variable i=1, first 16 binary message N from 16 one group binary system anti-counterfeiting information table 1start, to each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 195115DEST_PATH_IMAGE002
+
Figure 407922DEST_PATH_IMAGE003
+
Figure 51393DEST_PATH_IMAGE004
+
Figure 324242DEST_PATH_IMAGE005
] cryptographic calculation, and each 16 binary message is carried out [
Figure 990847DEST_PATH_IMAGE002
+
Figure 69661DEST_PATH_IMAGE003
+
Figure 505322DEST_PATH_IMAGE004
+ ] carry out i+1, j+1 and k+1 computing when cryptographic calculation, make next computing point to [ +
Figure 47796DEST_PATH_IMAGE007
+
Figure 337963DEST_PATH_IMAGE004
+
Figure 218194DEST_PATH_IMAGE005
] wherein i, j and k all increased by 1, by each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 656129DEST_PATH_IMAGE002
+ +
Figure 486998DEST_PATH_IMAGE004
+
Figure 538131DEST_PATH_IMAGE005
] cryptographic calculation, generating the binary add tight defense fake information table of 16 group, the shape of amplitude is set to two kinds:
Figure 401045DEST_PATH_IMAGE010
with
Figure 625353DEST_PATH_IMAGE011
, wherein be defined as the numeral 0,
Figure 908884DEST_PATH_IMAGE011
be defined as numeral 1, utilize the binary add tight defense fake information of 16 group generated by circulation look-up table modulation amplitude, make the shape of amplitude in its regular hybrid screening of the alteration of form according to above-mentioned two kinds of amplitudes, make in hybrid screening that the shape of amplitude is well-regulated to change, after modulation, adjacent 16 amplitudes form one group of 16 binary message, make it carry anti-counterfeiting information, and this anti-counterfeiting information is embedded in the full page site, can more effectively resist based on bootlegging behaviors such as camera, scanner, electronic documents.Obvious embed extractible anti-counterfeiting information by non-in printed matter, can provide valid certificates for genuine piece, there is stronger anti-forgery ability simultaneously, and do not increase extra false proof cost.
For solving above-mentioned technical matters, at first anti-counterfeiting information is carried out to digitizing, generate the scale-of-two anti-counterfeiting information table of 8 group, anti-counterfeiting information can be image information, Word message, trademark information etc., 8 one group of binary messages in scale-of-two anti-counterfeiting information table are expanded to 16 one group of binary messages, the generation most-significant byte is 0 16 one group scale-of-two anti-counterfeiting information table entirely, and each 16 binary message in 16 one group scale-of-two anti-counterfeiting information table are carried out
[
Figure 259094DEST_PATH_IMAGE002
+
Figure 287092DEST_PATH_IMAGE003
+
Figure 406358DEST_PATH_IMAGE004
+
Figure 533714DEST_PATH_IMAGE005
] cryptographic calculation, generate the binary add tight defense fake information table of 16 group, utilize 16 binary messages process chnnel codings in 16 the one group binary add tight defense fake information table generated, generate the binary modulated signal of 16 group with error detecting and error correcting function.Chnnel coding can adopt the various ways such as loop coding, convolutional encoding or Turbo coding, original continuous is changed the line map, and image signal is processed (RIP) through rasterizing and hybrid screening is exported shadow tone hybrid screening picture signal, comprising amplitude and FM screened image signal, 16 one group of binary modulated signals that utilize to generate adopt the shapes of amplitude in circulation look-up table modulation system modulation hybrid screening picture signals, the shape that makes amplitude according to
Figure 433537DEST_PATH_IMAGE010
with
Figure 937331DEST_PATH_IMAGE011
regular changing, make adjacent 16 amplitudes in the hybrid screening picture signal carry 16 scale-of-two anti-counterfeiting information by the change of shape, thereby be created on the hybrid screening picture signal that embeds anti-counterfeiting information in the full page site, realizes anti-counterfeit printing.
When extracting anti-counterfeiting information, at first gather the halftone dot image signal, through the fuzzy diagnosis of the shape to amplitude, differentiate the shape of amplitude, extract edge signal and the shape information of amplitude, the shape information of demodulation amplitude, export the binary modulated signal of 16 group.The binary modulated signal of 16 one group to demodulation output carries out channel-decoding, generates the scale-of-two deciphering anti-counterfeiting information table of 16 group after channel-decoding, and 16 binary messages that scale-of-two is deciphered in the anti-counterfeiting information table are denoted as H i, it is known by ciphering process,
H during operator control variable k=0 i=[
Figure 238999DEST_PATH_IMAGE002
+ +
Figure 924375DEST_PATH_IMAGE004
+
Figure 231860DEST_PATH_IMAGE005
],
H during operator control variable k=1 i=[ + +
Figure 403712DEST_PATH_IMAGE004
+
Figure 577205DEST_PATH_IMAGE005
],
H during operator control variable k=2 i=[
Figure 525569DEST_PATH_IMAGE006
+ +
Figure 527340DEST_PATH_IMAGE008
+ ],
H during operator control variable k=3 i=[
Figure 41815DEST_PATH_IMAGE006
+
Figure 118356DEST_PATH_IMAGE003
+
Figure 639467DEST_PATH_IMAGE004
+
Figure 889183DEST_PATH_IMAGE009
], 16 binary message H in scale-of-two deciphering anti-counterfeiting information table iposition control variable initial value design be i=1, first H from scale-of-two deciphering anti-counterfeiting information table 1start, each 16 binary message in scale-of-two deciphering anti-counterfeiting information table are carried out to H i=[ +
Figure 121898DEST_PATH_IMAGE003
+
Figure 130305DEST_PATH_IMAGE004
+
Figure 133114DEST_PATH_IMAGE005
] decrypt operation, solve scale-of-two anti-counterfeiting information N i, the generation most-significant byte is 0 16 one group scale-of-two anti-counterfeiting information table entirely, removes most-significant byte, generates the scale-of-two anti-counterfeiting information table of 8 group, recovers anti-counterfeiting signal and also exports anti-counterfeiting information.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 loads the anti-counterfeiting information process flow diagram.
Fig. 2 extracts the anti-counterfeiting information process flow diagram.
Embodiment
In loading anti-counterfeiting information flow chart 1, original anti-counterfeiting information (image, word, trade mark) is through digitized processing, generate the binary system anti-counterfeiting information table of 8 group, 8 one group of binary messages in binary system anti-counterfeiting information table are expanded to 16 one group of binary messages, generate most-significant byte and be entirely 0 16 one group binary system anti-counterfeiting information table, 16 binary messages of i group in 16 one group binary system anti-counterfeiting information table are denoted as N iI is greater than 0 positive integer, the eight-digit binary number encryption parameter is denoted as C, the positive integer that encryption parameter C is 0<=C<=256, two binary operator control variables are denoted as k, the positive integer that operator control variables k is 0<=k<=3, and eight control variables are denoted as j, the positive integer that control variables j is 0<=j<=256, operator
Figure 972894DEST_PATH_IMAGE001
Adopt+, * ,-, tetra-kinds of operators of ÷, during operator control variables k=0 Be defined as respectively "+", " * ", "-", " ÷ " computing, during operator control variables k=1
Figure 621361DEST_PATH_IMAGE001
Be defined as respectively "-", " * ", "+", " ÷ " computing, during operator control variables k=2
Figure 478458DEST_PATH_IMAGE001
Be defined as respectively "-", " ÷ ", "+", " * " computing, during operator control variables k=3
Figure 110428DEST_PATH_IMAGE001
Be defined as respectively " ÷ ", "-", " * ", "+" computing, during operator control variables k=0 cryptographic calculation be defined as [
Figure 761989DEST_PATH_IMAGE002
+
Figure 744989DEST_PATH_IMAGE003
+
Figure 77881DEST_PATH_IMAGE004
+ ], during operator control variables k=1 cryptographic calculation be defined as [
Figure 652399DEST_PATH_IMAGE006
+
Figure 919432DEST_PATH_IMAGE007
+
Figure 56015DEST_PATH_IMAGE004
+
Figure 396998DEST_PATH_IMAGE005
], during operator control variables k=2 cryptographic calculation be defined as [ + +
Figure 84965DEST_PATH_IMAGE008
+
Figure 546034DEST_PATH_IMAGE005
], during operator control variables k=3 cryptographic calculation be defined as [
Figure 975878DEST_PATH_IMAGE006
+
Figure 889607DEST_PATH_IMAGE003
+
Figure 367993DEST_PATH_IMAGE004
+
Figure 11464DEST_PATH_IMAGE009
], the initial value of setting encryption parameter C, initial value j=0 and the k=0 of setting operator control variables j and k, set 16 binary message N in 16 one group binary system anti-counterfeiting information table iPosition Control variable i=1, first 16 binary message N from 16 one group binary system anti-counterfeiting information table 1Start, to each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 284314DEST_PATH_IMAGE002
+
Figure 13235DEST_PATH_IMAGE003
+
Figure 29733DEST_PATH_IMAGE004
+
Figure 527710DEST_PATH_IMAGE005
] cryptographic calculation, and each 16 binary message is carried out [
Figure 971461DEST_PATH_IMAGE002
+
Figure 125362DEST_PATH_IMAGE003
+ +
Figure 298034DEST_PATH_IMAGE005
] carry out i+1, j+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 240583DEST_PATH_IMAGE006
+
Figure 616200DEST_PATH_IMAGE007
+
Figure 974500DEST_PATH_IMAGE004
+
Figure 447070DEST_PATH_IMAGE005
] wherein i, j and k all increased by 1, by each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 232623DEST_PATH_IMAGE002
+
Figure 157854DEST_PATH_IMAGE003
+ +
Figure 646921DEST_PATH_IMAGE005
] cryptographic calculation, generating the binary add tight defense fake information table of 16 group, the shape of amplitude is set to two kinds:
Figure 868955DEST_PATH_IMAGE010
With
Figure 219165DEST_PATH_IMAGE011
, wherein
Figure 981585DEST_PATH_IMAGE010
Be defined as the numeral 0,
Figure 100851DEST_PATH_IMAGE011
Be defined as numeral 1,16 binary add tight defense fake informations of generation, through chnnel coding, generate the binary modulated signal with error detecting and error correcting function.Chnnel coding can adopt the various ways such as loop coding, convolutional encoding or Turbo coding.Original continuous is changed the line map, and image signal is processed (RIP) through rasterizing and hybrid screening is exported shadow tone hybrid screening picture signal, comprising amplitude and FM screened image signal.Utilize the binary modulated signal generated to adopt the modulation system of tabling look-up that circulates, the shape of amplitude in modulation hybrid screening picture signal, make in hybrid screening that the shape of amplitude is regular to change, generate the hybrid screening picture signal that embeds anti-counterfeiting information, by the circulation modulation system of tabling look-up, make adjacent 16 amplitudes generate 16 bit binary data by the change of shape, make it carry anti-counterfeiting information, and this anti-counterfeiting information is embedded in the full page site, realize anti-counterfeit printing.
In extracting anti-counterfeiting information process flow diagram 2 when extracting anti-counterfeiting information, at first gather the halftone dot image signal, fuzzy diagnosis through the shape to amplitude, differentiate the shape of amplitude, extract edge signal and the shape information of amplitude, the shape information of demodulation amplitude, export the binary modulated signal of 16 group.The binary modulated signal of 16 one group to demodulation output carries out channel-decoding, generates the scale-of-two deciphering anti-counterfeiting information table of 16 group after channel-decoding, and 16 binary messages that scale-of-two is deciphered in the anti-counterfeiting information table are denoted as H i, it is known by ciphering process,
H during operator control variable k=0 i=[
Figure 556103DEST_PATH_IMAGE002
+
Figure 393609DEST_PATH_IMAGE003
+
Figure 897402DEST_PATH_IMAGE004
+ ],
H during operator control variable k=1 i=[
Figure 497328DEST_PATH_IMAGE006
+
Figure 884447DEST_PATH_IMAGE007
+
Figure 926352DEST_PATH_IMAGE004
+
Figure 82527DEST_PATH_IMAGE005
],
H during operator control variable k=2 i=[
Figure 817265DEST_PATH_IMAGE006
+
Figure 363784DEST_PATH_IMAGE003
+
Figure 537276DEST_PATH_IMAGE008
+
Figure 485641DEST_PATH_IMAGE005
],
H during operator control variable k=3 i=[
Figure 453597DEST_PATH_IMAGE006
+
Figure 475693DEST_PATH_IMAGE003
+
Figure 859401DEST_PATH_IMAGE004
+ ], 16 binary message H in scale-of-two deciphering anti-counterfeiting information table iposition control variable initial value design be i=1, first H from scale-of-two deciphering anti-counterfeiting information table 1start, each 16 binary message in scale-of-two deciphering anti-counterfeiting information table are carried out to H i=[
Figure 66708DEST_PATH_IMAGE002
+
Figure 650137DEST_PATH_IMAGE003
+ + ] decrypt operation, solve scale-of-two anti-counterfeiting information N i, the generation most-significant byte is 0 16 one group scale-of-two anti-counterfeiting information table entirely, removes most-significant byte, generates the scale-of-two anti-counterfeiting information table of 8 group, recovers anti-counterfeiting signal and also exports anti-counterfeiting information.

Claims (1)

1. one kind generates the binary modulated signal by anti-counterfeiting information by cryptographic calculation and chnnel coding, and anti-counterfeiting information is embedded in to bivariate one dimension in full page goes forward one by one and encrypt binary system antiforging printing method, its feature by the circulation modulation system of tabling look-up Be:Anti-counterfeiting information is carried out to digitlization, generate the binary system anti-counterfeiting information table of 8 group, anti-counterfeiting information is image information, Word message or trademark information, for preventing from ciphering process producing information spillover, 8 one group of binary messages in binary system anti-counterfeiting information table are expanded to 16 one group of binary messages, the generation most-significant byte is 0 16 one group binary system anti-counterfeiting information table entirely, and 16 binary messages of the group of the i in 16 one group binary system anti-counterfeiting information table are denoted as to N iI is greater than 0 positive integer, the eight-digit binary number encryption parameter is denoted as C, the positive integer that encryption parameter C is 0<=C<=256, two binary operator control variables are denoted as k, the positive integer that operator control variables k is 0<=k<=3, and eight control variables are denoted as j, the positive integer that control variables j is 0<=j<=256, operator
Figure 2012104028007100001DEST_PATH_IMAGE001
Adopt+, * ,-, tetra-kinds of operators of ÷, during operator control variables k=0
Figure 214379DEST_PATH_IMAGE001
Be defined as respectively "+", " * ", "-", " ÷ " computing, during operator control variables k=1
Figure 923709DEST_PATH_IMAGE001
Be defined as respectively "-", " * ", "+", " ÷ " computing, during operator control variables k=2
Figure 812030DEST_PATH_IMAGE001
Be defined as respectively "-", " ÷ ", "+", " * " computing, during operator control variables k=3
Figure 694536DEST_PATH_IMAGE001
Be defined as respectively " ÷ ", "-", " * ", "+" computing, during operator control variables k=0 cryptographic calculation be defined as [
Figure 984703DEST_PATH_IMAGE002
+
Figure 2012104028007100001DEST_PATH_IMAGE003
+
Figure 864934DEST_PATH_IMAGE004
+ ], during operator control variables k=1 cryptographic calculation be defined as [
Figure 240552DEST_PATH_IMAGE006
+
Figure 2012104028007100001DEST_PATH_IMAGE007
+
Figure 864431DEST_PATH_IMAGE004
+
Figure 9105DEST_PATH_IMAGE005
], during operator control variables k=2 cryptographic calculation be defined as [
Figure 122554DEST_PATH_IMAGE006
+
Figure 985468DEST_PATH_IMAGE003
+ + ], during operator control variables k=3 cryptographic calculation be defined as [
Figure 430990DEST_PATH_IMAGE006
+ +
Figure 809199DEST_PATH_IMAGE004
+
Figure 2012104028007100001DEST_PATH_IMAGE009
], the initial value of setting encryption parameter C, initial value j=0 and the k=0 of setting operator control variables j and k, set 16 binary message N in 16 one group binary system anti-counterfeiting information table iPosition Control variable i=1, first 16 binary message N from 16 one group binary system anti-counterfeiting information table 1Start, to each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 752683DEST_PATH_IMAGE002
+
Figure 145618DEST_PATH_IMAGE003
+
Figure 779862DEST_PATH_IMAGE004
+
Figure 283656DEST_PATH_IMAGE005
] cryptographic calculation, and each 16 binary message is carried out [ +
Figure 149161DEST_PATH_IMAGE003
+ +
Figure 578185DEST_PATH_IMAGE005
] carry out i+1, j+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 672043DEST_PATH_IMAGE006
+
Figure 469097DEST_PATH_IMAGE007
+ +
Figure 923530DEST_PATH_IMAGE005
] wherein i, j and k all increased by 1, by each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 871894DEST_PATH_IMAGE002
+
Figure 777533DEST_PATH_IMAGE003
+ + ] cryptographic calculation, generating the binary add tight defense fake information table of 16 group, the shape of amplitude is set to two kinds:
Figure 388140DEST_PATH_IMAGE010
With
Figure 2012104028007100001DEST_PATH_IMAGE011
, wherein
Figure 402364DEST_PATH_IMAGE010
Be defined as the numeral 0,
Figure 985792DEST_PATH_IMAGE011
Be defined as numeral 1, utilize the binary add tight defense fake information of 16 group generated through chnnel coding, generation has 16 one group of binary modulated signals of error detecting and error correcting function, original continuous is changed the line map, and image signal is processed (RIP) through rasterizing and hybrid screening is exported halftoning hybrid screening picture signal, comprising amplitude and FM screened image signal, 16 one group of binary modulated signals that utilize to generate adopt the shapes of amplitude in circulation look-up table modulation system modulation hybrid screening picture signals, the shape that makes amplitude according to
Figure 438770DEST_PATH_IMAGE010
With
Figure 158464DEST_PATH_IMAGE011
Regular changing, make adjacent 16 amplitudes in the hybrid screening picture signal carry 16 binary add tight defense fake informations by the change of shape, thereby be created on the hybrid screening picture signal that embeds anti-counterfeiting information in the full page site, realize anti-counterfeit printing.
CN201210402800.7A 2012-10-22 2012-10-22 Bivariate one dimension goes forward one by one encrypted binary antiforging printing method Expired - Fee Related CN102945452B (en)

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