CN102407703A - Another processing method for digitized anti-fake printing - Google Patents
Another processing method for digitized anti-fake printing Download PDFInfo
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- CN102407703A CN102407703A CN2010102896133A CN201010289613A CN102407703A CN 102407703 A CN102407703 A CN 102407703A CN 2010102896133 A CN2010102896133 A CN 2010102896133A CN 201010289613 A CN201010289613 A CN 201010289613A CN 102407703 A CN102407703 A CN 102407703A
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Abstract
The invention relates to another processing method for digitized anti-fake printing in the field of information processing, which is characterized in that an invisible dot matrix bar code capable of recording information through printing is printed on an anti-fake label, wherein an image of the invisible dot matrix bar code is segmented into a plurality of partial images; and the segmented images are respectively printed on a printing medium by one printing material through different printing ink, ink powder and ink. By adopting the digitized anti-fake technology provided by the invention, wrongdoers can be prevented from breaking the invisible dot matrix bar code by using an image sensor with a peculiar spectrum, the anti-fake effects of preventing electrodispersion and keying can be really achieved and one-fake one-code can be really realized on ordinary printing equipment, printing ink and printing medium, so the problems of bill faking, tampering, commodity counterfeiting, and the like which spread in society are thoroughly solved and harmonious development of the society is promoted.
Description
Technical field
The invention belongs to field of information processing, especially a kind of processing method of digitlization anti-counterfeit printing.
Background technology
Along with the fast development of China's economy, increase day by day as the demand of the media bill of state tax revenue, current; Bill has become the marketable securities that are only second to currency, is accompanied by the lifting of the demand and the value of bill, the mad manufacturing fictitious bill of unprincipled fellow in the society; Seek exorbitant profit; Serious harm social security, destroyed the national tax policy, caused enormous economic loss to the country and people.
Aspect bill anti-counterfeit, delivering of a large amount of achievements in research and patent documentation arranged in the world, conclude and get up to have following several aspect:
Be utilized in the ground-tint that the background printing of bill has floating word function, realize the bill anti-counterfeit method of printing.Representational patent has the patent application of delivering in Japan " to prevent forged note " (the open 2009-34921 of special permission).In this patent application, a kind of sub-image that is printed on the bill background is disclosed, this sub-image naked eyes are not easy to pick out, and still, when duplicating with duplicator, these sub-images are run off on copy.Can differentiate the true and false of bill with this.
Utilize specialty inks printing bill to realize the bill anti-counterfeit method of printing.Representational patent has " preventing forged note " (the open 2002-211102 of special permission) that delivers in Japan.Realize the purpose of bill anti-counterfeit through nacreous ink printing.
Utilize the antiforge laser holographic label to realize the bill anti-counterfeit method of printing.Representational patent has " bill that has the antiforge laser holographic label " (the open 7-108787 of special permission) that delivers in Japan.This patent is mainly used in member management, and the card and the bill that will have the antiforge laser holographic label are carried out strippable stickup, can realize false proof purpose on the one hand, the operation when being easy to develop the member again simultaneously.
Utilize dedicated paper to realize the bill anti-counterfeit method of printing.Representational patent has " decision method of the manifolding bill and the true and false thereof " (the open 11-157255 of special permission) that delivers in Japan.This patent mainly proposes first page of carbon paper; The back side with second page of carbon paper; In filling in the zone of the amount of money, be coated with the colour former printing ink of identical patterns respectively, when manifolding; When first page is filled in the amount of money, on the amount of money literal of second page and the 3rd page, have identical floral designs.Generally speaking; Distort bill and mainly occur in distorting second page amount of money part; When taking place to the distorting of second page amount of money part, just different at the literal floral designs of the amount of money of second page and the 3rd page, can decides bill whether be distorted with the method.
Utilize the feel temperature sensitive ink to realize the bill anti-counterfeit method of printing.Representational patent has " preventing forged note " (the open 2000-37978 of special permission) that delivers in Japan.This patent mainly proposes to have light temperature sensitive ink and is printed on the bill with pattern, touches the back because the temperature of hand can make pattern become transparent color with hand, in proper order the true and false of decides bill.
Utilize two-dimensional bar code to realize the bill anti-counterfeit method of printing.Representational patent has " in circulation of commodities, prevent the method for Simulatio and carry out the producing device of tamper-proof sticker with this " (the open 2004-94510 of special permission) that delivers in Japan.This patent mainly proposes the sequence number of bill is represented with two-dimensional bar code, in order to realize the purpose that can not forge of bill.
Utilize ultrared absorption and reflectance ink to realize the bill anti-counterfeit method of printing.Representational patent has " preventing forged note " (the open 7-101190 of special permission) that delivers in Japan.This patent mainly propose with the sequence number of bill for example No.12 and 67 use the infrared ray absorbing ink printing, 345 use the infrared reflection ink printing, just can measure the difference of the sequence number of bill through IR spectrophotometer, realize the differentiation of the true and false with this.
Utilize grey and black ink to realize the bill anti-counterfeit method of printing.Representational patent has " preventing forged note " (the open 2002-162872 of special permission) that delivers in Japan.This patent mainly proposes on the anti-counterfeiting mark of bill, to use C, M, and three colors of Y are synthesized a kind of grey and are gone out certain pattern with black printing, and whether be copy, can carry out the true and false of bill and differentiate through human eye if can identify this bill.
Delivering of the method for anti-counterfeit of some bills just do not enumerated here one by one in addition.Above-mentioned traditional method exists following problem:
Be utilized in the ground-tint that the background printing of bill has floating word function; Realize the bill anti-counterfeit method of printing, just can make owing to ground-tint has only through program, and; As long as just can distinguish true from false, therefore be the low effective bill anti-counterfeit method of a kind of cost through common duplicator.But this method can not solve the problem that prevents that bill from forging completely, can only be as auxiliary false proof method.
Utilize specialty inks printing bill to realize the bill anti-counterfeit method of printing, this method for anti-counterfeit often wins user's the fan that inclines at the beginning very much, still, is disclosed owing to certain printing ink very soon, has just lost its false proof meaning.
Utilize the antiforge laser holographic label to realize the bill anti-counterfeit method of printing; This is a kind of efficient ways that a kind of masses can distinguish true from false; But; Identical with above-mentioned method, along with popularizing of the equipment of making the antiforge laser holographic label, the problem that the antiforge laser holographic label is replicated is more and more paid close attention to by people.
Utilize dedicated paper to realize the bill anti-counterfeit method of printing,, all belong to the false proof means in a specified time with utilizing specialty inks printing bill to realize that the bill anti-counterfeit method of printing is identical.
Utilize the feel temperature sensitive ink to realize the bill anti-counterfeit method of printing; This method one occurs, and wins user's favorable comment very soon, still; Because this technology is still still immature at present in the world; The term of validity of temperature sensitive ink only is half a year to one year, therefore, has seriously influenced applying of this technology.
Utilize two-dimensional bar code to realize the bill anti-counterfeit method of printing, this method also begins to be applied in China, and this is the false proof blank of digitlization; But; Two-dimensional bar code is not considered false proof field, to use from invention at the very start, therefore, exists inborn deficiency; Two-dimensional bar code cannot prevent that not only electricity from dividing, and all can not prevent even duplicate.Therefore, it is forced a bit to be used for false proof field.
Utilize ultrared absorption and reflectance ink to realize the bill anti-counterfeit method of printing; Its identification is the IR spectrophotometer through precision; This method both had been not easy to popularize; Simultaneously still belong to the false proof category of analogue type, the digitlization method for anti-counterfeit that this present invention afterwards that can not coexist proposes is mentioned in the same breath.
Utilize grey and black ink to realize the bill anti-counterfeit method of printing; Its identification is to carry out Direct Recognition through human eye; This method still belongs to the false proof category of analogue type, and, be easy to crack; Can not in quite long period, obtain effective application, the digitlization method for anti-counterfeit that this present invention afterwards that also more can not coexist proposes is mentioned in the same breath.
Comprehensive above-mentioned traditional method for anti-counterfeit nearly all belongs to the false proof category of analogue type, therefore, faces the reality of the cruelty in the false proof market that as virtue rises one foot, vice rises ten, and these technology all will be short-lived.People press for a kind of digitized, need not any special printing material only at common printing equipment, and common printing ink really has the method for not reproducible effect under the common print media.At common printing equipment, common printing ink on the common print media as if really the antifalse effect that can realize just means that also the unprincipled fellow can't have an opportunity to take advantage of, is also just being explained the effect of the certainty of this technology just.
Summary of the invention
The objective of the invention is to deficiency, propose to adopt the digitlization anti-counterfeiting technology to above-mentioned traditional method for anti-counterfeit existence, can be through stealthy dot matrix bar code at common printing equipment; Common printing ink, under the common print media, real realization has can prevent that electricity from dividing; Prevent to scratch picture and realize one yard of a mark; Thereby, thoroughly solve bill and forge, distort and problem such as commodity fraud spreads socially, promote the harmonious development of society.
The present invention solves its technical problem and takes following technical scheme to realize:
The information that the present invention proposes a kind of digitized anti-counterfeit printing is imbedded method, it is characterized in that:
(1) but anti-false sign be printed a kind of through the printing recorded information stealthy dot matrix bar code;
(2) image with above-mentioned stealthy dot matrix bar code is divided into plural parts of images;
(3) to the image after above-mentioned cutting apart, respectively by different printing ink, ink powder, a kind of printed material in the ink is printed on the print media.
The invention allows for a kind of information identifying method of digitized anti-counterfeit printing, it is characterized in that:
(1) have infrared ray, visible light, ultraviolet ray is alternately thrown light at the interior light source of different spectral characteristics more than two kinds, and pairing imageing sensor is alternately implemented the operation of reading stealthy dot matrix bar code facing to stealthy dot matrix bar code;
(2) a plurality of images that imageing sensor alternately read synthesize a stealthy dot matrix bar code image, isolate the dot matrix of stealthy dot matrix bar code;
(3) through stealthy dot matrix bar code can recorded information the code value that calculates of the rule of distribution of distribution or physics character of geometric character of each information dot matrix.
And; Stealth dot matrix bar code institute information recorded comprises: the identification information of representing its true or false; One yard information of one mark, billing machine is beaten air ticket according to authentication information, the ticket contents customized information; Anti-tamper information, the label information of bill is in the information or the in use essential information of bill of interior at least a its true or false as a token of.
And above-mentioned stealthy dot matrix bar code can be mixed with the camouflage color dot matrix; Through AES, it is comprised the numerical value of stealthy dot matrix bar code, distributing position puts in order and implements the computer encipher processing in more than one interior information.
And; The identification of above-mentioned stealthy dot matrix bar code of mixing with the camouflage color dot matrix is through above-mentioned AES; It is comprised the numerical value of stealthy dot matrix bar code, and distributing position puts in order and implements image after computer enciphers are handled in interior more than one information and carry out decryption processing.
And; Described geometric stealthy dot matrix bar code is meant: constituting the distribution of the information point of stealthy dot matrix bar code, is to have or not the difference of the position of information point by its information point; The difference of the direction of information point; The difference of the shape of information point, the difference of the quantity of information point, the result of dot matrix combination is in the formed stealthy dot matrix bar code of the geometric characteristic of interior at least a form.
And; Described physical stealthy dot matrix bar code is meant: constituting the distribution of the information point of stealthy dot matrix bar code, is the difference by the modulation system of information point, the result's of the phase modulated of information point difference; The difference of the direction of propagation of information point; In not the coexisting of the frequency that the difference of the mechanics vector of information point, information point distribute, the stealthy dot matrix bar code that the physical characteristic of at least a form forms.
And; When realizing stealthy dot matrix bar code printing through high speed ink jet numbering machine or digital printer, stealthy dot matrix barcode data is through comprising the character library form, the vector data form; Image data format, ink jet numbering machine or digital printer private data format are sent in ink jet numbering machine or the digital printer.
And the printing of stealthy dot matrix bar code is through comprising the direct print form of computer, computer master making form; The virtual printing form; Cover printing form, the character library form, directly generate printed data and be installed to ink jet numbering machine or digital printer in form at least a form realize.
Advantage of the present invention and good effect are:
The present invention proposes another digitized novel counterfeit-prevention method, this method can prevent that illegal person from utilizing the imageing sensor of peculiar spectrum to crack stealthy dot matrix bar code in implementing anti-counterfeit printing; Need not only to rely on common printing equipment, common printing ink under any special printing material; Under the condition of common print media; Realized really having not reproducible, can not divide by electricity, can not scratch the antifalse effect of picture.To hitting lawless person's fraud, stabilize society, reduce the country and the people's losses, improve the international status of China in code, false proof subject skill field, create the effect that technical support has been played by harmonious society.
Description of drawings
The stealthy dot matrix bar code of being to use Fig. 1 realizes the flow chart of processing method of one yard of the ticket of bill;
Fig. 2 is a kind of flow chart of recognition methods of variable information printed images of stealthy dot matrix bar code character library;
Fig. 3 is the sketch map through the different many bit informations of direction distribution record of information point;
Fig. 4 is the sketch map that writes down many bit informations through the information point different patterns;
Fig. 5 is by concentrating site and the sketch map that disperses the stealthy dot matrix bar code that the site constituted;
Fig. 6 is the sketch map according to the many bit informations of outcome record of different positions and phase modulated;
Fig. 7 is the sketch map through the many bit informations of different physical phase modulation recording of information point;
Fig. 8 is the sketch map by diverse location distribution and many those the special information of phase modulated outcome record;
Fig. 9 is the sketch map through the stealthy dot matrix bar code of the combination realization of dot matrix;
Figure 10 is the sketch map of international representational data matrix two-dimensional bar code;
Figure 11 utilizes the color that RGB and CMYK can not conversion to realize false proof sketch map;
Figure 12 adds camouflage color dot matrix, the sketch map of camouflage color mark in stealthy dot matrix bar code;
Figure 13 is the sketch map with the bill of the stealthy dot matrix bar code of having of 600dpi press printing;
Figure 14 is the sketch map with the bill of the stealthy dot matrix bar code of having of 200dpi press printing;
Figure 15 is in the space of stealthy dot matrix bar code dot matrix, inserts the sketch map of camouflage color dot matrix;
Figure 16 is the sketch map that the ordinary two dimensional bar code also can add the camouflage color dot matrix;
Figure 17 is the sketch map of the formation of the stealthy dot matrix bar code under two kinds of different spectrum situation;
Figure 18 is the sketch map that the bill customized information is all represented with stealthy dot matrix bar code.
Among the figure:
301 is a site
302 is an information point in the site
303 is another information point in the site
501 is the information point of AM screen
502 is the information point of FM screen
601 is a site
602 is the information point in the site
701 is a site
702 is an information point in the site
800 is the dot pattern of a stealthy dot matrix bar code
801-804 is the information dot matrix
805-809 is the positioning reference dot matrix
900 are the stealthy dot matrix bar code through dot matrix combination realization
The point of 901 expression information " 1 "
The point of 902 expression information " 0 "
903 expression referencer
1201 is the appearance ticket that adopts the bill anti-counterfeit of stealthy dot matrix bar code realization
1202 is stealthy dot matrix bar code
1203 is the camouflage color dot matrix
1204 is the camouflage color mark
1501 is a site of stealthy dot matrix bar code
1502 is an information point of stealthy dot matrix bar code
1503 is a camouflage color point of stealthy dot matrix bar code
1601 for having the two-dimensional bar code of camouflage color dot matrix
1602 for the point of expression information " 1 "
1603 is the camouflage color point
1701 are information record dot matrix
1702 is the benchmark dot matrix
The specific embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is done further detailed description, but embodiment of the present invention is illustrative, rather than determinate.
The information that the present invention proposes a kind of digitized anti-counterfeit printing is imbedded method, it is characterized in that:
(1) but anti-false sign be printed a kind of through the printing recorded information stealthy dot matrix bar code;
(2) image with above-mentioned stealthy dot matrix bar code is divided into plural parts of images;
(3) to the image after above-mentioned cutting apart, respectively by different printing ink, ink powder, a kind of printed material in the ink is printed on the print media.
The invention allows for a kind of information identifying method of digitized anti-counterfeit printing, it is characterized in that:
(1) have infrared ray, visible light, ultraviolet ray is alternately thrown light at the interior light source of different spectral characteristics more than two kinds, and pairing imageing sensor is alternately implemented the operation of reading stealthy dot matrix bar code facing to stealthy dot matrix bar code;
(2) a plurality of images that imageing sensor alternately read synthesize a stealthy dot matrix bar code image, isolate the dot matrix of stealthy dot matrix bar code;
(3) through stealthy dot matrix bar code can recorded information the code value that calculates of the rule of distribution of distribution or physics character of geometric character of each information dot matrix.
And above-mentioned stealthy dot matrix bar code can be mixed with the camouflage color dot matrix, through AES, it is comprised the numerical value of stealthy dot matrix bar code, and distributing position puts in order and implements the computer encipher processing in more than one interior information.
And; The identification of above-mentioned stealthy dot matrix bar code of mixing with the camouflage color dot matrix is through above-mentioned AES; It is comprised the numerical value of stealthy dot matrix bar code, and distributing position puts in order and implements image after computer enciphers are handled in interior more than one information and carry out decryption processing.
The stealthy dot matrix bar code that is to use Fig. 1 realizes the flow chart of the processing method of one yard of a mark.Shown in Fig. 1: use stealthy dot matrix bar code to realize that the processing method of one yard of a mark is made up of five steps.
In a first step: at first, read the printed images that will print variable information that comprises Commercial goods labels.Here, be not limited only to bill, Commercial goods labels, the ticket of going by ship by bus, the printed images of colosseum literature and art special show admission ticket etc., every all printed images of printing variable information that need all can be included.In the printed images that will print variable information, in the zone that will print stealthy dot matrix bar code, printed images has carried out not containing the color treatments of K version, and, used C, M in advance; The R that Y is synthetic, G, B color space and C, M, Y, the color that the K color space can not conversion; For example by C, M, the grey that Y is synthetic, in the printing camouflage color dot matrix, and use C, M; The R that Y is synthetic, G, B color space and C, M, Y; The K color space can not conversion color, printing camouflage color mark is mainly used in and prevents that illegal person from duplicating stealthy dot matrix bar code through the method that electricity divides, and carries out the stingy picture of manual work through scanning, obtains the image of stealthy dot matrix bar code.The camouflage color image also can be occurred by the form of dot matrix, can make the color of camouflage color image darker like this, and antifalse effect is better.Through above-mentioned processing, even can obtain under the printing condition of the stealthy dot matrix bar code of low resolution, the dot matrix that also can make human eye be difficult for discovering stealthy dot matrix bar code distributes, and beautifies printed images.This is that the ordinary two dimensional bar code is difficult to accomplish.
In second step, read the digital step of variable information, read the digital data of customer-furnished variable information; These data are generally 12 decimal datas, mainly represent the number of bill, the attribute of commodity; Build date, manufacturing location is permitted the selling spot; And user's information specific etc., variable information can also be carried out encryption through computer.
As the admission ticket of large-scale public place, the bill of communications and transportation, can through with bill represented and the in use essential information of bill, also can be used as variable information, imbed through the stealthy dot matrix bar code information of carrying out, thereby realize the management that automatically-controlled door advances.
In third step; It is stealthy dot matrix bar code shift step; Numerical value according to variable information; From be installed in the stealthy dot matrix bar code character library the operating system in advance, read the stealthy dot matrix bar code of geometric or physical distribution of the directly recorded information of corresponding with it form performance with character library.Can also go out the directly printed images of the stealthy dot matrix bar code of geometric or physical distribution of recorded information through program making according to the numerical value of variable information.
Here; Described geometric stealthy dot matrix bar code is meant: constituting the distribution of the information point of stealthy dot matrix bar code, is to have or not the difference of the position of information point by its information point; The difference of the direction of information point; The difference of the shape of information point, the difference of the quantity of information point, the set that binary array is distributed according to customer requirements is carried out the result of the dot matrix combination that the dot matrix combination filtered out in the formed stealthy dot matrix bar code of the geometric characteristic of interior at least a form.
And described physical stealthy dot matrix bar code is meant: constitute the distribution of the information point of stealthy dot matrix bar code; It is difference by the modulation system of information point; The result's of the phase modulated of information point difference, the difference of the direction of propagation of information point, the difference of the mechanics vector of information point; In not the coexisting of the frequency that information point distributes, the stealthy dot matrix bar code that the physical characteristic of at least a form forms.
In the 4th step, the bill sign indicating number of printing variable information, and print stealthy dot matrix bar code.Directly the stealthy dot matrix bar code of the geometric or physical distribution of recorded information and variable information digital printing are to deciding printing position.
In last step, judge whether the digital processing of all variable informations is all accomplished; Otherwise return second step; The printing that is then variable information and stealthy dot matrix bar code finishes.
On common high speed digital printer, the method that realizes high speed printing is stealthy dot matrix bar code to be made the form of character library, is encased in the composing system of coding printing machine; The composing system of coding printing machine is handled according to the form of literal; The stealthy dot matrix bar code that all variable informations is digital and digital corresponding with variable information generates printed data, and printed data directly is installed in the high speed digital printer; Thereby, realize high speed coding printing.
Realize the another kind of method of high speed coding printing, be exactly, the printed images of digital and corresponding stealthy dot matrix bar code with the variable information number with all variable informations; The printing position, information such as printed dimensions are through program, or tool software is made into PDF; TIFF, PS, EPS; The printed data of document form such as JPEG or BMP; Or be made into the printed data of the print image file form of other printing machine manufacturer regulation, and printed data directly is installed in the high speed digital printer, also can realize high speed coding printing.
That is to say; When realizing stealthy dot matrix bar code printing through high speed ink jet numbering machine or digital printer; Stealthy dot matrix barcode data is through comprising the character library form; The vector data form, image data format, ink jet numbering machine or digital printer private data format are sent in ink jet numbering machine or the digital printer.
Stealthy dot matrix bar code can the stealthy dot matrix bar code through the character library form be carried out the printing of variable information in the composing system of coding printing machine or printer; Can also on the driver of printer, the driver of a virtual printer be installed through the mode of virtual printer; The driver of this virtual printer is connected coding printing machine or printer through program; From the driver of coding printing machine or printer, just can obtain a printed images, in this printed images, stick according to stealthy dot matrix bar code image that will be relevant on user's appointed positions with variable information; Then; Be sent to coding printing machine or printer again and implement printing or printing, repeat above-mentioned operating process, finally just can realize printing or printing whole variable information.
The printing of variable information can also be adopted the method that covers printing (Overly Print); Promptly on user's appointed positions; The overall printing image that stealthy dot matrix bar code image that will be relevant with variable information sticks; Be placed on and have in the specified internal memory of the coding printing machine that covers printing functionality or printer, coding printing machine or printer are automatically with this printed images and bill, and the packing of product or label printing image cover printing; Repeat above-mentioned operating process, finally just can realize printing or printing whole variable information.
The printing of variable information can also be adopted direct method of printing; Promptly pass through program at same bill, the variable information printing position of the printed images of the packing of product or label, variable information data of every interpolation; And on the stealthy dot matrix bar code image position relevant with variable information; Whenever the view data that sticks a stealthy dot matrix bar code relevant with variable information just is sent to coding printing machine or printer, implements printing or prints, up to the printing of whole variable information or be completed for printing.
In a word; The printing of variable information data and stealthy dot matrix bar code is through comprising the direct print form of computer; The computer master making form, the virtual printing form covers printing form; The character library form, directly generate printed data and be installed to ink jet numbering machine or digital printer in form at least a form realize.
Fig. 2 is a kind of flow chart of recognition methods of variable information printed images of stealthy dot matrix bar code character library.
As shown in Figure 2: a kind of recognition methods of variable information printed images of stealthy dot matrix bar code character library is made up of three steps.
At first; In the step that reads stealthy dot matrix bar code image, through comprising scanner, CCD; CMOS, cell phone cameras camera lens read the printed images of geometric or physical distribution of directly recorded information of the form performance of stealthy dot matrix bar code at any one interior imageing sensor.
Here, comprise scanner, CCD, CMOS, cell phone cameras camera lens at any one interior imageing sensor when reading stealthy dot matrix bar code image, towards stealthy dot matrix bar code image.
Secondly, in the step of the code value of the stealthy dot matrix bar code of identification, when utilizing the image that imageing sensor reads; Stealthy dot matrix bar code dot matrix and other images have tangible difference; For example, gray scale difference, color distinction; Difference in brightness or the like is utilized the separable dot matrix that goes out stealthy dot matrix bar code of its difference.Identify the code value of stealthy dot matrix bar code through the direct rule of the stealthy dot matrix bar code of the geometric or physical distribution of recorded information.
The above-mentioned computer graphical code that is showed with stealthy dot matrix bar code form is with the form of character library, image format, vector form wherein a kind of form showed.
At last, showing or exporting in the step of stealthy dot matrix bar code value, show or export the code value of stealthy dot matrix bar code.Whether whether the data after the user discerns through the stealthy dot matrix screen bar code recognizer of observation are consistent with the data on bill or the antifalsification label, be real thereby just can differentiate this bill or antifalsification label.Simultaneously, also can data be directly inputted in the database of computer, can reach the effect of automatic input through stealthy dot matrix bar code.
Identifier is when the stealthy dot matrix bar code of identification; The general infrared illumination that adopts, infrared imaging sensor is discerned, and mainly considers to adopt printing ink or the ink powder or the transparent red outside line absorbing ink etc. of carbon containing to print to stealthy dot matrix bar code; Utilize these printed materials to have characteristic to infrared ray absorbing; And the CMY color is to the characteristic of infrared transmitting, thereby, can stealthy dot matrix bar code be imbedded in the coloured image.When adopting the thermal printer printing,, therefore can adopt the image recognition device of visible light to discern because therefore carbon containing not in the image that thermal printer prints out can not be discerned with the infrared ray identifier.In order to carry out the application of higher levels of false proof invisible-bar-number, can also take the printing ink of different spectrum or ink powder to print respectively with referencer the information point of stealthy dot matrix bar code.When identification, take the alternately illumination of different spectrum, respectively information point and referencer extraction are carried out integral body identification.No matter utilize what spectral characteristic to carry out the recognition of image, as long as guarantee resulting image, the information dot matrix can be different from other iconic elements, just can think the image that pattern-recognition is possible, with regard to the stealthy dot matrix bar code that identifies that can be correct.
Fig. 3 is the sketch map through the different many bit informations of direction distribution record of dot matrix.The stealthy dot matrix bar code that site 301 is made up of information point 302 and 303 is represented different information according to the different directions that information point 302 and 303 is constituted.
In Fig. 3, figure a can represent information 0, and figure b can represent information 1, and figure c can represent information 2, and figure d can represent information 3.Stealthy dot matrix bar code a, b, c, d obviously can regard as by the different directions and the different electromagnetic wave directions of propagation, and the different mechanical vector result realizes what the many bit informations of computer write down.
Fig. 4 is the sketch map through the many bit informations of different patterns logger computer.In Fig. 4, figure a can represent information 0, and figure b can represent information 1, and figure c can represent information 2, and figure d can represent information 3.
Fig. 5 is by concentrating site and the sketch map that disperses the stealthy dot matrix bar code that the site constituted.As shown in Figure 5, all printing points in the site is constituted the example that spaced point b that a concentrated site a that dot matrix constituted and the site that has a dispersion at least constitute constitutes the site pattern of the information of can imbedding.Be set at the value of information " 1 " to concentrated site a, disperse site b to be set at the value of information " 0 ".On the contrary, can be set at the value of information " 0 " to concentrated site a, disperse site b to be set at the value of information " 1 ".
In addition, as shown in Figure 5 in order to constitute the standard dot pattern, the point 501 high H that concentrate site a
50As the diameter value of two printing points (the minimum printable size of printer), the width W of the point 501 of concentrating site a
50Diameter value as a printing points.The point 502 of dispersion site b only plays the effect of shading gray scale homogenization, is not used in identification, the height H of the point 502 that disperses the site
51With width W
51All as the diameter value of a printing points.The height of site is H
52, width is W
52
As shown in Figure 5, can regard concentrated site a as amplitude modulation mode i.e. (AM) screen, disperseing site b to regard i.e. (FM) screen of mode of frequency regulation as.Promptly can come recorded information according to the different dot pattern of modulation system.
In addition, count the site, disperse site b to regard high-frequency as to count the site, so we can say that concentrating site a is according to the composition recorded information of different frequency number with disperseing site b because can regard concentrated site a as low frequency.
And then, concentrate the gray value of each site of site a big, disperse the gray value of each site of site b little, so we can say that also concentrating site a and disperseing site b is the recorded information of coming to the different gray values of a point.
In other words, the size of the point of concentrated site a is big, and the size of each point of dispersion site b is little, so we can say that concentrating site a and disperseing site b is that the dot pattern that basis varies in size comes recorded information.
About above content, a lot of meanss of interpretation can also be arranged.If but identical with above dot pattern all belongs within the scope of the present invention.
Fig. 6 is a sketch map of being realized the many bit information records of computer by information point according to the result of different positions and phase modulated.As shown in Figure 6: figure a can represent information 0, and figure b can represent information 1, and figure c can represent that information 2 and figure d can represent information 3, and figure e and figure f can represent positioning reference information.
In addition, Fig. 7 is a given stealthy dot matrix bar code site 701 shown in Figure 6, a that the some transmitting signal of the different physical phase modulated (PM) through information point 702 is constituted, b, the result's of four kinds of outs of phase modulation of c and d (PM) sketch map.
The derivation of the Mathematical Modeling of Fig. 6 and the dot pattern that is made up of phase modulated shown in Figure 7 is as follows.
If by the function of the dot pattern that square lattice constituted of interval T be ζ (x, y), then ζ (x, y) following by the result after the standardization:
Here, replying function to the signal of the dot pattern of phase modulated is:
η(x-i×T，y-j×T)＝η(m×T，n×T)
By level of standardization m, and the centre coordinate value of the point of vertical n dot pattern does
(m * T, n * T), in addition each of dot pattern put relative centre coordinate (m * T, the displacement function of n * T) be [ε (and m, n), δ (m, n)], so, the set D of dot pattern is following:
η(m×T，n×T)＝η{ε(m，n)×T，δ(m，n)×T}+
η{[1-ε(m，n)]×T，[1-δ(m，n)]×T}+…+
η{[∞-ε(m，n)]×T，[∞-δ(m，n)]×T}+
η{[1+ε(m，n)]×T，[1+δ(m，n)]×T}+…+
η{[∞+ε(m，n)]×T，[∞+δ(m，n)]×T}
Promptly
{[m×T+ε(m，n)×T]，[n×T+δ(m，n)×T]}∈D
Thus, input is replied function η { [i+ ε (m, n)] * T, the phase-shifted amount ζ after [j+ δ (m, n)] * T} brings into signal
M-i, n-jThe output signal be:
Here, control ε (m, n) and δ (m n), just can realize being directed against transmitting signal { ζ m, the phase modulated of n}.
Fig. 8 is one and is distributed by the diverse location of information point and the sketch map of the stealthy dot matrix bar code of the many bit informations of phase modulated outcome record.As shown in Figure 8,800 is stealthy dot matrix bar code image.801,802,803 and 804 is information point, and each point is according to the numerical value 0 to 3 of can representing shown in Figure 6, i.e. 2 bit informations, and four points just can be represented numerical value 0 to 255, i.e. 8 bit informations.Each point can also be represented numerical value 0 to 7, i.e. 3 bit informations, and four points just can be represented numerical value 0 to 4096, i.e. 12 bit informations.805; 806 is horizontal direction positioning reference dot matrix, is mainly used in the positioning reference in the horizontal direction as information point 801-804, or the horizontal direction initial value of phase modulated; 808; 809 is vertical direction positioning reference dot matrix, is mainly used in the positioning reference in vertical direction as information point 801-804, or the vertical direction initial value of phase modulated.
The information recording method of stealthy dot matrix bar code shown in Figure 8, can also regard as by information point relatively level be decided to be dot matrix, and the diverse location of perpendicular positioning dot matrix distributes and writes down many bit informations.
It not only can be 1 * 1 dot matrix that stealthy dot matrix bar code character library dot matrix is arranged, 1 * 2 dot matrix, 3 * 3 dot matrix; Can also be 3 * 4, or 4 * 4 dot matrix, or 4 * 5; Or 5 * 5 dot matrix, or 5 * 6 dot matrix, or 6 * 6 dot matrix; Or n * n dot matrix, so long as the geometric or physical dot matrix that the present invention proposes is arranged, the character library that is made all belongs within the interest field of the present invention.
Fig. 9 is a sketch map of realizing stealthy dot matrix bar code through the combination of dot matrix.As shown in Figure 9, realize another means of stealthy dot matrix bar code, be to find out one group in the set that distributes of the dot matrix at common two-dimensional bar code to have the code that comprises printing screen characteristic and distribute; Or dot matrix distributes uniform relatively; Or between code hamming apart from maximum be that similar degree is minimum, or the combined result of other purposes is again according to the recognition characteristics of fixed focal length; Dot matrix with code dwindles again, constitutes a stealthy dot matrix bar code.
Fig. 9 is the example of the invisible-bar-number of 20 * 20 dot matrix, and 900 is the dot pattern of the stealthy dot matrix bar code of 20 * 20 dot matrix among the figure, and a little 901 expression information points " 1 " are arranged, and does not have point 902 expression information " 0 ", dot matrix 903 expression positioning reference dot matrix on every side.As shown in Figure 9, in the set that the dot matrix of common two-dimensional bar code distributes, according to printing screen characteristic; Find out distribution uniform, a kind of combination distribution that dot matrix is separated from each other is for example in each group 6 * 6 dot matrix of common two-dimensional bar code; 3 * 3 dot matrix that are separated from each other by each group constitute stealthy dot matrix bar code shown in Figure 9, and the information of each byte of some matrix representation of 3 * 3 can be found out; Compare with the ordinary two dimensional bar code, each dot matrix is separated from each other, and dot matrix distributes more even; Though compare, some irregular distributions are arranged, because bigger than above-mentioned stealthy dot matrix bar code information recorded amount with above-mentioned stealthy dot matrix bar code; Therefore, certain Practical significance is arranged.
In addition, according to the needs of using, for example increase the hamming distance between the code to the ordinary two dimensional bar code; Reduce the similar degree between code, improve the code distributing homogeneity, the maximization of code distribution area; Minimizing or the like of code distribution area can be realized various dot matrix combinations, forms various code forms; Simultaneously, can generate the character library of various dot pattern, these all belong within the scope of the present invention.
Figure 10 is the sketch map of international representational data matrix two-dimensional bar code.Shown in figure 10, the ordinary two dimensional bar code is compared with above-mentioned stealthy dot matrix bar code, but can only write down the information of a bit as each point of characteristic point (Symbol) of recorded information.And the dot matrix that has links together.In order to carry out the recognition of on-fixed focal length, the size of every bit can not be very little.Therefore must take certain space, can not imbed code as information.
Figure 11 utilizes color region that RGB color space and CMYK color space can not conversion to realize the sketch map of anti-counterfeit printing.The general employed color space of scanner is the RGB form, and the employed color space of common printed machine is the CMYK form.Shown in figure 13, if color is chosen in the color region of RGB/CMYK, its printed image that goes out can be duplicated and print out by scanner faithfully, and promptly this color region is reproducible zone.Shown in figure 13 again, if select the printed image that goes out of RGB color region or CMYK color region not duplicated faithfully by scanner.Utilize such principle can realize the effect of anti-counterfeit printing.For example; The color of stealthy dot matrix bar code is selected the K version, on stealthy dot matrix bar code, can print the image that becomes with CMY three colour cells, and and for example the color of image of fruit CMY three colour cells one-tenth is darker; Actual composition with black; But owing to do not contain carbon in the color of image with CMY three colour cells one-tenth, be transmission, therefore do not influence the recognition of the stealthy dot matrix bar code of K version infrared ray.But; If above-mentioned image is duplicated by scanner, the printed image that goes out, the originally color of image of the composition that becomes of CMY three colour cells with black; When minute version, will be reflected on the K version; Clash with the original stealthy dot matrix bar code on the K version, therefore can not correctly read the stealthy dot matrix bar code on the K version, thereby reach false proof effect.
Figure 12 adds camouflage color dot matrix, the sketch map of camouflage color mark in stealthy dot matrix bar code.Shown in figure 12,1201 is the bill image, and 1202 is stealthy dot matrix bar code, and 1203 is the camouflage color dot matrix, and 1204 is the camouflage color mark.Stealthy dot matrix bar code is used the printing ink of the property distinguished; Ink powder, a kind of printed material in the ink prints, here; The printing ink of the property distinguished is meant: use readable printed material on print media, to implement printing; Image after its printing under institute's standing wave long illumination and corresponding imageing sensor, can read through imageing sensor.Camouflage color dot matrix and camouflage color mark use the printing ink of the non-property distinguished; Ink powder, a kind of printed material in the ink prints, here; The printing ink of the non-property distinguished is meant: use non-readable printed material on print media, to implement printing; Image after its printing under institute's standing wave long illumination and corresponding imageing sensor, can not read through imageing sensor.For example: adopt infrared illumination, and infrared imaging sensor is when distinguishing, with this understanding; Common C, M, each color of Y all appear transparent by blank sheet of paper reflective after; Therefore no matter by the synthetic random color of these three kinds of colors, the image that reads at infrared ray sensor is a white image, therefore; Common C, M, each color of Y all belongs to the printed material of the non-property distinguished to infrared ray sensor.And K version color is because therefore carbon containing, adopts infrared illumination; And infrared imaging sensor is when distinguishing, and the K color presents the characteristic to infrared ray absorbing with this understanding, and the image that reads at infrared ray sensor is a black image; Therefore; With the image of K color printing, can clearly distinguish out, under infrared ray sensor, be the printing ink of the property distinguished so be defined as.
The camouflage color dot matrix is mainly used in the fascination machine, makes optical pickup device can not read stealthy dot matrix bar code.The size of camouflage color dot matrix is similar with stealthy dot matrix bar code as far as possible, and arrangement can be considered various, can with the dot matrix homotaxy of stealthy dot matrix bar code, also can be different.Can be neat arrangement, also can make arrangement at random.The angle that dot matrix distributes can be with the distribution angle of stealthy dot matrix bar code always, also can be different.In a word, so long as illegal person can't be plucked out the dot matrix of stealthy dot matrix bar code with the method for manual work just can.
The bill image, the camouflage color dot matrix, the camouflage color mark is because therefore the personalized data of right and wrong can reinstate common offset press with bill image one, and protruding or intaglio press prints, and stealthy dot matrix bar code is printed with the high speed ink jet numbering machine.Certainly, when need not the customized information printing, the also available common offset press of stealthy dot matrix bar code, protruding or intaglio press prints.The camouflage color dot matrix can be a lot, and overlap with stealthy dot matrix bar code dot matrix, also can be arranged in the space of stealthy dot matrix bar code dot matrix.
The camouflage color mark mainly is to be used for confusing human eye, makes human eye be difficult for seeing stealthy dot matrix bar code, therefore; Can import vision mode; Can be that the hanging point single color printing does not become a pattern, also can be to be arranged in a pattern with dot matrix, and the surface can be dull color; Also can be camouflage color shape pattern, also can form by several patterns.
Stealthy dot matrix bar code can independently exist, also can be with camouflage color dot matrix or stealthy dot matrix bar code of the common composition of camouflage color mark, and that is to say: camouflage color dot matrix or camouflage color mark can become a part of stealthy dot matrix bar code.
Figure 13 is the sketch map with the bill of the stealthy dot matrix bar code of having of 600dpi press printing.Under the printing precision of 600dpi; The stealthy dot matrix bar code that prints out, each index point is of a size of about 0.042mm, according to the Ruili criterion; Human eye can be seen and be of a size of below the 0.1mm; As shown in the figure, on the SCURITY sign printing be difficult for being identified with the stealthy dot matrix bar code of invoice number identical information by naked eyes, adding stealthy dot matrix bar code is on the SCURITY sign with black component that is printed on to be become by CMY three colour cells; As stated, promptly use very high-precision scanner also to be difficult for copying stealthy dot matrix bar code.Therefore can play on the basis of one yard of a mark and have not reproducible antifalse effect again.
Figure 14 is the sketch map with the bill of the stealthy dot matrix bar code of having of 200dpi press printing.Under the printing precision of 200dpi; The stealthy dot matrix bar code that prints out, the size of each index point is at least about 0.13mm, can see according to Ruili criterion human eye to be of a size of below the 0.1mm; As shown in the figure; Though the stealthy dot matrix bar code with the invoice number identical information of printing can be may be seen indistinctly on the SCURITY sign, because stealthy dot matrix bar code is the SCURITY sign with black component that is printed on to be become by CMY three colour cells; As stated, promptly use duplicator or very high-precision scanner still can not copy stealthy dot matrix bar code fully.Can play equally on the basis of one yard of a mark and have not reproducible antifalse effect again.
On bill, be printed with bill identification information, beat on the invoice machinery at machine stealthy dot matrix screen bar code recognizer is installed, just can the formation machine beat the bill identification system of invoice machinery, can take precautions against illegal person's false tickets really beat the phenomenon generation of reaping staggering profits.
Figure 15 is in the space of stealthy dot matrix bar code dot matrix, inserts the sketch map of camouflage color dot matrix.Shown in figure 15,1501 is an information recording unit of invisible-bar-number, and 1502 is an information point of invisible-bar-number, and 1503 is a point of camouflage color dot matrix.As above give an account of that kind that continues, the information point of invisible-bar-number adopts the ink printing of the property distinguished, and the camouflage color dot matrix adopts the ink printing of the non-property distinguished, though therefore added the camouflage color dot matrix, recognizer still can accurately be discerned.But if with common scanner, the information point of invisible-bar-number and camouflage color dot matrix all are used as a kind of color and have read; Scanner can't be told any dot matrix; If carry out artificial the intervention, scratch picture with artificial method, do not know which is the information point of recessive bar code yet; Which is the camouflage color dot matrix, and this has just played the purpose that prevents to scratch through high accuracy scanning the method forgery of picture.
Figure 16 is the sketch map that the ordinary two dimensional bar code also can add the camouflage color dot matrix.Shown in figure 16,1601 is common two-dimensional bar code, and 1602 is an information flag of common two-dimensional bar code, and 1603 for to have added the camouflage color dot matrix in common two-dimensional bar code, and here, the camouflage color dot matrix is added in the space of two-dimensional barcode information mark.With above-mentioned the same; The ink printing of the property distinguished is adopted in an information flag of common two-dimensional bar code; The camouflage color dot matrix adopts the ink printing of the non-property distinguished; Therefore though added the camouflage color dot matrix, the code value that recognizer still can accurate identification two-dimensional bar code under ultrared lighting condition.But if with common scanner, the information flag of two-dimensional bar code and camouflage color dot matrix all are used as a kind of color and have read; Scanner can't be told any dot matrix; If carry out artificial the intervention, scratch picture with artificial method, do not know which is the information flag of two-dimensional bar code yet; Which is the camouflage color dot matrix, equally also can play to prevent the purpose of forging.But two-dimensional bar code is not that information is imbedded code eventually, and the information characteristics spot size of two-dimensional bar code is very big, is difficult for hiding, and this possibly be its inadequate natural endowment.Add the read write line that to have bought on the market and do not support to add the recognition of the two-dimensional bar code of camouflage color dot matrix, therefore on popularizing, receive certain restriction.
Figure 17 is the formation of the stealthy dot matrix bar code under two kinds of different spectrum situation and the sketch map of read method.Shown in figure 17; In a stealthy dot matrix bar code, can write down dot matrix 1701 by information and form with benchmark dot matrix 1702, the information of can establishing write down dot matrix 1701 under a certain spectrum situation for having the property of recognition; Since benchmark dot matrix 1702 under another kind of spectrum situation for having the property of recognition; They present orthogonality, promptly information record dot matrix 1701 under a certain spectrum situation for having the property of recognition, can not the property distinguished and under another kind of spectrum situation, have.In like manner, 1702 under another kind of spectrum situation for having the property of recognition, can not the property distinguished and under preceding a kind of spectrum situation, have.They also can present semi-orthogonal property, promptly between information record dot matrix 1701 and benchmark dot matrix 1702, have a side to satisfy above-mentioned orthogonality.A kind ofly like this consider it mainly is to be used for preventing that illegal person from utilizing the optical image sensor of a certain spectrum to crack code; Because; When two parts of the stealthy dot matrix bar code of printing; In an image, divide version to go out; Therefore information record dot matrix 1701 is can be not ruined because of being divided into two versions with position relation between the benchmark dot matrix 1702, and illegal person can only be respectively when forging reads the image of two different spectrum, will inevitably destruction information record dot matrix 1701 and benchmark dot matrix 1702 between the position concern.
To the information record dot matrix of above-mentioned stealthy dot matrix bar code, benchmark dot matrix and camouflage color dot matrix use AES, and with their position, order and numerical value are encrypted, and obtain the printed images of a random distribution.In like manner, use the position of decipherment algorithm with them, order and numerical value are deciphered, and obtain the printed images of original stealthy dot matrix bar code.The purpose of this processing also is in order to prevent that illegal person from duplicating stealthy dot matrix bar code through the artificial picture of scratching.
Figure 18 is the sketch map that the bill customized information is all represented with stealthy dot matrix bar code.Shown in figure 18, purchasing unit, Description of Goods, quantity, price, the amount of tax to be paid, information such as sales unit at password area, are imbedded with the stealthy dot matrix bar code information of carrying out fully.Owing to be to adopt impact printer to print, although printing precision is very low, still can the acquired information amount, arrange reasonable effect attractive in appearance.
It more than is the processing method of a kind of digitlization anti-counterfeit printing of proposing of the present invention; In concrete the application, limit because of length and only just to have enumerated some simple example, be directed against stealthy dot matrix in the practical application; The camouflage color mark; The camouflage color dot matrix, and the formation of the stealthy dot matrix bar code under the different spectrum situation and read method also Protean disposal skill, processing mode or the like can occur; These all are the concrete application problems under guiding theory of the present invention, all belong within the interest field of the present invention.
Claims (9)
1. the information of a digitized anti-counterfeit printing is imbedded method, it is characterized in that:
(1) but anti-false sign be printed a kind of through the printing recorded information stealthy dot matrix bar code;
(2) image with above-mentioned stealthy dot matrix bar code is divided into plural parts of images;
(3) to the image after above-mentioned cutting apart, respectively by different printing ink, ink powder, a kind of printed material in the ink is printed on the print media.
2. the information identifying method of a digitized anti-counterfeit printing is characterized in that:
(1) have infrared ray, visible light, ultraviolet ray is alternately thrown light at the interior light source of different spectral characteristics more than two kinds, and pairing imageing sensor is alternately implemented the operation of reading stealthy dot matrix bar code facing to stealthy dot matrix bar code;
(2) a plurality of images that imageing sensor alternately read synthesize a stealthy dot matrix bar code image, isolate the dot matrix of stealthy dot matrix bar code;
(3) through stealthy dot matrix bar code can recorded information the code value that calculates of the rule of distribution of distribution or physics character of geometric character of each information dot matrix.
3. the information of a kind of digitized anti-counterfeit printing according to claim 1 is imbedded method; It is characterized in that: stealthy dot matrix bar code institute information recorded comprises: the identification information of representing its true or false; One yard information of one mark, billing machine is beaten air ticket according to authentication information, the ticket contents customized information; Anti-tamper information, the label information of bill is in the information or the in use essential information of bill of interior at least a its true or false as a token of.
4. the information of a kind of digitized anti-counterfeit printing according to claim 1 is imbedded method, it is characterized in that: above-mentioned stealthy dot matrix bar code can be mixed with the camouflage color dot matrix; Through AES, it is comprised the numerical value of stealthy dot matrix bar code, distributing position puts in order and implements the computer encipher processing in more than one interior information.
5. the information of a kind of digitized anti-counterfeit printing according to claim 2 is imbedded method; It is characterized in that: the identification of above-mentioned stealthy dot matrix bar code of mixing with the camouflage color dot matrix is through above-mentioned AES; It is comprised the numerical value of stealthy dot matrix bar code; Distributing position puts in order and implements image after computer enciphers are handled in interior more than one information and carry out decryption processing.
6. the information of a kind of digitized anti-counterfeit printing according to claim 1 is imbedded method; It is characterized in that: described geometric stealthy dot matrix bar code is meant: constituting the distribution of the information point of stealthy dot matrix bar code, is to have or not the difference of the position of information point by its information point; The difference of the direction of information point; The difference of the shape of information point, the difference of the quantity of information point, the result of dot matrix combination is in the formed stealthy dot matrix bar code of the geometric characteristic of interior at least a form.
7. the information of a kind of digitized anti-counterfeit printing according to claim 1 is imbedded method; It is characterized in that: described physical stealthy dot matrix bar code is meant: constitute the distribution of the information point of stealthy dot matrix bar code; It is difference by the modulation system of information point; The result's of the phase modulated of information point difference; The difference of the direction of propagation of information point, the difference of the mechanics vector of information point, the stealthy dot matrix bar code that the physical characteristic of the interior at least a form that do not coexist of the frequency that information point distributes forms.
8. according to claim 1; The information of 2 described a kind of digitized anti-counterfeit printings is imbedded method and recognition methods; It is characterized in that: when realizing stealthy dot matrix bar code printing through high speed ink jet numbering machine or digital printer, stealthy dot matrix barcode data is through comprising the character library form, the vector data form; Image data format, ink jet numbering machine or digital printer private data format are sent in ink jet numbering machine or the digital printer.
9. according to claim 1; The information of 2 described a kind of digitized anti-counterfeit printings is imbedded method and recognition methods, it is characterized in that: the printing of stealthy dot matrix bar code is through comprising the direct print form of computer, computer master making form; The virtual printing form; Cover printing form, the character library form, directly generate printed data and be installed to ink jet numbering machine or digital printer in form at least a form realize.
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