CN102945430A - Single-parameter, single-variable, double-increasing and circulating encryption type binary anti-counterfeit printing method - Google Patents

Single-parameter, single-variable, double-increasing and circulating encryption type binary anti-counterfeit printing method Download PDF

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CN102945430A
CN102945430A CN2012104026336A CN201210402633A CN102945430A CN 102945430 A CN102945430 A CN 102945430A CN 2012104026336 A CN2012104026336 A CN 2012104026336A CN 201210402633 A CN201210402633 A CN 201210402633A CN 102945430 A CN102945430 A CN 102945430A
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binary
group
counterfeiting information
operator control
control variables
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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 provides a single-parameter, single-variable, double-increasing and circulating encryption type binary anti-counterfeit printing method; in the method, through [+++] encryption operation and channel coding, binary anti-counterfeit information can be generated into a binary modulating signal; and the orderly change of the anti-counterfeit information in the form of an amplitude modulation dot is embedded into the whole page through a circulating table lookup method; the anti-counterfeit information can be identified from any fragment during identifying a printing material; and the single-parameter, single-variable, double-increasing and circulating encryption type binary anti-counterfeit printing method provided by the invention can be widely applied to the anti-counterfeit field of printing materials.

Description

The double circulation encryption scale-of-two antiforging printing method that increases progressively of one-parameter single argument
affiliated technical field:
The present invention relates to a kind of anti-counterfeiting printing technology, particularly a kind of one-parameter single argument is double increases progressively circulation 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 triad operator control variables is denoted as j, the positive integer that operator control variables j is 0<=j<=7, operator
Figure 490223DEST_PATH_IMAGE001
adopt+,-, *, tetra-kinds of operators of ÷, during operator control variables k=0
Figure 672943DEST_PATH_IMAGE001
be defined as respectively "+", during operator control variables k=1
Figure 718259DEST_PATH_IMAGE001
be defined as respectively " * ", during operator control variables k=2
Figure 644627DEST_PATH_IMAGE001
be defined as respectively "-", during operator control variables k=3
Figure 193420DEST_PATH_IMAGE001
while being defined as respectively " ÷ " operator control variables k=0 cryptographic calculation be defined as [
Figure 812620DEST_PATH_IMAGE002
+
Figure 610812DEST_PATH_IMAGE003
+
Figure 544133DEST_PATH_IMAGE004
+
Figure 744170DEST_PATH_IMAGE005
], during operator control variables k=1 cryptographic calculation be defined as [
Figure 3113DEST_PATH_IMAGE002
+
Figure 23022DEST_PATH_IMAGE006
+
Figure 556771DEST_PATH_IMAGE004
+
Figure 80156DEST_PATH_IMAGE005
], during operator control variables k=2 cryptographic calculation be defined as [
Figure 775580DEST_PATH_IMAGE002
+
Figure 17205DEST_PATH_IMAGE006
+
Figure 89067DEST_PATH_IMAGE007
+
Figure 998117DEST_PATH_IMAGE005
], during operator control variables k=3 cryptographic calculation be defined as [
Figure 598862DEST_PATH_IMAGE002
+
Figure 593363DEST_PATH_IMAGE006
+
Figure 468915DEST_PATH_IMAGE007
+ ], the initial value of setting encryption parameter C, initial value k=0 and the j=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 4119DEST_PATH_IMAGE002
+
Figure 220336DEST_PATH_IMAGE003
+
Figure 634000DEST_PATH_IMAGE004
+
Figure 517643DEST_PATH_IMAGE005
] cryptographic calculation, and each 16 binary message is carried out [
Figure 194612DEST_PATH_IMAGE002
+
Figure 163705DEST_PATH_IMAGE003
+ +
Figure 588050DEST_PATH_IMAGE005
] carry out i+1, j+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 701499DEST_PATH_IMAGE002
+ +
Figure 382196DEST_PATH_IMAGE004
+
Figure 240431DEST_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 55940DEST_PATH_IMAGE002
+
Figure 202888DEST_PATH_IMAGE003
+
Figure 762045DEST_PATH_IMAGE004
+
Figure 943628DEST_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 930038DEST_PATH_IMAGE008
with
Figure 829861DEST_PATH_IMAGE009
, wherein
Figure 927130DEST_PATH_IMAGE008
be defined as the numeral 0, 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, generate most-significant byte and be entirely 0 16 one group scale-of-two anti-counterfeiting information table, to each 16 binary message in 16 one group scale-of-two anti-counterfeiting information table carry out [
Figure 120531DEST_PATH_IMAGE002
+ +
Figure 143031DEST_PATH_IMAGE004
+ ] 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 627419DEST_PATH_IMAGE008
with 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 675326DEST_PATH_IMAGE002
+ +
Figure 185122DEST_PATH_IMAGE004
+
Figure 812413DEST_PATH_IMAGE005
],
H during operator control variable k=1 i=[
Figure 55175DEST_PATH_IMAGE002
+
Figure 185942DEST_PATH_IMAGE006
+
Figure 855958DEST_PATH_IMAGE004
+ ],
H during operator control variable k=2 i=[
Figure 220260DEST_PATH_IMAGE002
+
Figure 205534DEST_PATH_IMAGE006
+
Figure 46451DEST_PATH_IMAGE007
+
Figure 851596DEST_PATH_IMAGE005
],
H during operator control variable k=3 i=[
Figure 436161DEST_PATH_IMAGE002
+
Figure 807099DEST_PATH_IMAGE006
+
Figure 287759DEST_PATH_IMAGE007
+
Figure 376938DEST_PATH_IMAGE005
], 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 968456DEST_PATH_IMAGE002
+ +
Figure 111042DEST_PATH_IMAGE004
+
Figure 421937DEST_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 triad operator control variables is denoted as j, the positive integer that operator control variables j is 0<=j<=7, operator Adopt+,-, *, tetra-kinds of operators of ÷, during operator control variables k=0
Figure 162677DEST_PATH_IMAGE001
Be defined as respectively "+", during operator control variables k=1
Figure 516298DEST_PATH_IMAGE001
Be defined as respectively " * ", during operator control variables k=2 Be defined as respectively "-", during operator control variables k=3
Figure 513390DEST_PATH_IMAGE001
While being defined as respectively " ÷ " operator control variables k=0 cryptographic calculation be defined as [
Figure 182269DEST_PATH_IMAGE002
+ +
Figure 461120DEST_PATH_IMAGE004
+
Figure 994870DEST_PATH_IMAGE005
], during operator control variables k=1 cryptographic calculation be defined as [
Figure 518255DEST_PATH_IMAGE002
+
Figure 213679DEST_PATH_IMAGE006
+
Figure 986463DEST_PATH_IMAGE004
+
Figure 58324DEST_PATH_IMAGE005
], during operator control variables k=2 cryptographic calculation be defined as [
Figure 436216DEST_PATH_IMAGE002
+
Figure 568120DEST_PATH_IMAGE006
+
Figure 562620DEST_PATH_IMAGE007
+ ], during operator control variables k=3 cryptographic calculation be defined as [
Figure 670571DEST_PATH_IMAGE002
+
Figure 973376DEST_PATH_IMAGE006
+
Figure 924015DEST_PATH_IMAGE007
+
Figure 337678DEST_PATH_IMAGE010
], the initial value of setting encryption parameter C, initial value k=0 and the j=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 690162DEST_PATH_IMAGE002
+ +
Figure 132962DEST_PATH_IMAGE004
+
Figure 819158DEST_PATH_IMAGE005
] cryptographic calculation, and each 16 binary message is carried out [
Figure 557307DEST_PATH_IMAGE002
+
Figure 670757DEST_PATH_IMAGE003
+
Figure 127146DEST_PATH_IMAGE004
+
Figure 351454DEST_PATH_IMAGE005
] carry out i+1, j+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 209688DEST_PATH_IMAGE002
+ +
Figure 172145DEST_PATH_IMAGE004
+
Figure 731302DEST_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 912885DEST_PATH_IMAGE002
+
Figure 723514DEST_PATH_IMAGE003
+
Figure 357758DEST_PATH_IMAGE004
+
Figure 455027DEST_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 756695DEST_PATH_IMAGE008
With
Figure 914007DEST_PATH_IMAGE009
, wherein
Figure 35547DEST_PATH_IMAGE008
Be defined as the numeral 0,
Figure 936507DEST_PATH_IMAGE009
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 623840DEST_PATH_IMAGE002
+
Figure 420895DEST_PATH_IMAGE003
+
Figure 560889DEST_PATH_IMAGE004
+
Figure 468802DEST_PATH_IMAGE005
],
H during operator control variable k=1 i=[ +
Figure 978598DEST_PATH_IMAGE006
+
Figure 605889DEST_PATH_IMAGE004
+
Figure 317493DEST_PATH_IMAGE005
],
H during operator control variable k=2 i=[
Figure 713839DEST_PATH_IMAGE002
+
Figure 383855DEST_PATH_IMAGE006
+ +
Figure 13736DEST_PATH_IMAGE005
],
H during operator control variable k=3 i=[
Figure 733431DEST_PATH_IMAGE002
+
Figure 574348DEST_PATH_IMAGE006
+
Figure 645072DEST_PATH_IMAGE007
+
Figure 229637DEST_PATH_IMAGE005
], 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 69417DEST_PATH_IMAGE002
+
Figure 81235DEST_PATH_IMAGE003
+
Figure 170414DEST_PATH_IMAGE004
+
Figure 761932DEST_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.

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 one-parameter single argument in full page is double to be increased progressively circulation and encrypt the binary system antiforging printing method by the circulation modulation system of tabling look-up, It is characterized in that: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 triad operator control variables is denoted as j, the positive integer that operator control variables j is 0<=j<=7, operator
Figure 787300DEST_PATH_IMAGE001
Adopt+,-, *, tetra-kinds of operators of ÷, during operator control variables k=0 Be defined as respectively "+", during operator control variables k=1
Figure 407954DEST_PATH_IMAGE001
Be defined as respectively " * ", during operator control variables k=2
Figure 606854DEST_PATH_IMAGE001
Be defined as respectively "-", during operator control variables k=3
Figure 806891DEST_PATH_IMAGE001
While being defined as respectively " ÷ " operator control variables k=0 cryptographic calculation be defined as [
Figure 331413DEST_PATH_IMAGE002
+ +
Figure 353913DEST_PATH_IMAGE004
+
Figure 877298DEST_PATH_IMAGE005
], during operator control variables k=1 cryptographic calculation be defined as [ +
Figure 2012104026336100001DEST_PATH_IMAGE006
+
Figure 611085DEST_PATH_IMAGE004
+
Figure 886209DEST_PATH_IMAGE005
], during operator control variables k=2 cryptographic calculation be defined as [ +
Figure 396004DEST_PATH_IMAGE006
+
Figure 656084DEST_PATH_IMAGE007
+
Figure 266057DEST_PATH_IMAGE005
], during operator control variables k=3 cryptographic calculation be defined as [ + +
Figure 17479DEST_PATH_IMAGE007
+
Figure 2012104026336100001DEST_PATH_IMAGE008
], the initial value of setting encryption parameter C, initial value k=0 and the j=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 431142DEST_PATH_IMAGE002
+
Figure 314785DEST_PATH_IMAGE003
+
Figure 257333DEST_PATH_IMAGE004
+
Figure 226426DEST_PATH_IMAGE005
] cryptographic calculation, and each 16 binary message is carried out [
Figure 178201DEST_PATH_IMAGE002
+ +
Figure 295379DEST_PATH_IMAGE004
+
Figure 220610DEST_PATH_IMAGE005
] carry out i+1, j+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 987795DEST_PATH_IMAGE002
+
Figure 49292DEST_PATH_IMAGE006
+ +
Figure 808486DEST_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 549226DEST_PATH_IMAGE003
+
Figure 738899DEST_PATH_IMAGE004
+
Figure 169880DEST_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 735991DEST_PATH_IMAGE009
With
Figure 2012104026336100001DEST_PATH_IMAGE010
, wherein
Figure 568818DEST_PATH_IMAGE009
Be defined as the numeral 0,
Figure 460550DEST_PATH_IMAGE010
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 With 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.
CN2012104026336A 2012-10-22 2012-10-22 Single-parameter, single-variable, double-increasing and circulating encryption type binary anti-counterfeit printing method Pending CN102945430A (en)

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