CN102616043B - Hidden information grating unlocking anti-counterfeiting method and system - Google Patents
Hidden information grating unlocking anti-counterfeiting method and system Download PDFInfo
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Abstract
The invention belongs to the field of anti-counterfeiting technology for products, and provides a hidden information grating unlocking anti-counterfeiting method and a system. The hidden information grating unlocking anti-counterfeiting method can be directly implemented by means of normal printing (lithographic offset printing, flexographic printing, intaglio printing, metal lithographic offset printing, silk screen printing and digital printing), can be used for printing on surfaces of any printed materials (such as paper, paperboards, plastic films, tinplates and the like), no production costs are added, hidden images and texts only can be detected by a special grating unlocking film, a graph of anti-counterfeiting content of a product is hidden by grating anti-counterfeiting technology, hidden patterns are displayed via the grating unlocking film, high invisibility and security are realized, the hidden images and texts cannot be reprinted by means of enlarging, scanning or copying, otherwise hidden information can be lost, scanning and preprinting preventive functions are powerful, counterfeit and shoddy products can be stopped against entering markets from the sources, the hidden information grating unlocking anti-counterfeiting method brings great convenience for enterprises to crack down on fake products and maintain benefits of consumers, and the technological content of products of packaging and printing enterprises can be increased.
Description
Technical field
The invention belongs to products antifake technique field, relate in particular to a kind of false proof method and system of grating release that hide Info.
Background technology
In today of the flourishing prosperity of commodity market, new product continues to bring out, and when particularly best brand of product is founded, various counterfeit and shoddy goods also flood market with quantity with surprising rapidity.Therefore, we must strengthen anti-counterfeiting power, are strictly on guard against the injury of counterfeit and shoddy goods to business and consumer.According to incompletely statistics, the turnover of current fake and inferior commodities accounts for the 5%-6% of quantum of world trade, every year up to hundred million dollars of 1500-1800, brings great destruction to brand enterprise and name brands, makes enterprise suffer huge loss; In China, counterfeit and shoddy goods cause economic losses more than 2,000 hundred million RMB every year.The numerous and confused dynamics of investment strengthening in brand establish and protection of each enterprise, so the anti-counterfeiting technology of various difference in functionalitys arises, has promoted the research and development of anti-counterfeiting technology.
Anti-counterfeiting technology has become a know-how brand-new and that change at development, and it generally can be divided into physics anti-counterfeiting technology, chemical anti-forgery ink technology, biological anti-counterfeiting technology, material anti-counterfeiting technology, computer network anti-counterfeiting technology, anti-counterfeiting printing technology etc.The anti-counterfeit printing of current packing articles is for meeting the need of market, its development trend is manufactured false proof from raw material (false proof stock and anti-forgery ink), to directions such as false proof, the information-based encode false-proof of design plate-making, false proof, the personalized coding of printing technology are false proof, change.
The image that we contact at ordinary times, figure and word major part finally will be by the output for printing on stocks, as trade mark, the packing of product, publication, replica, certificate, certificate, magnetic card, currency, paper representing value etc., this just makes anti-counterfeiting printing technology seem extremely important.
And existing technology has proposed to utilize the method that interpolation hides Info and identifies in image, but have the following disadvantages: invention is all by the manual operations of Photoshop image processing software, and technique is numerous and diverse; The encryption hiding Info for single image or file; There is no the ready-made grating release film that can be used for special screen frequency, the sheet material of selling on market or sheet material grating, only have several conventional grid stroke numbers to provide, and the die sinking of passing through of distinct line number is produced, and small lot batch manufacture is expensive; Existing patent great majority are for printing or going out traditional film, then go printing.
Summary of the invention
The invention provides a kind of false proof method and system of grating release that hide Info, be intended to solve existing technology and proposed to utilize the method that interpolation hides Info and identifies in image, but have the following disadvantages: invention is all by the manual operations of Photoshop image processing software, and technique is numerous and diverse; The encryption hiding Info for single image or file; There is no the ready-made grating release film that can be used for special screen frequency, the sheet material of selling on market or sheet material grating, only have several conventional grid stroke numbers to provide, and the die sinking of passing through of distinct line number is produced, and small lot batch manufacture is expensive; Existing patent great majority are for printing or going out traditional film, then go the problem of printing.
The object of the present invention is to provide a kind of false proof method of grating release that hides Info, the method comprises the following steps:
Choose source images and hide Info;
Image is scanned, spell large version, then explain through RIP raster image processor screening, obtain four 1bitTIFF images;
By one of them, the 1bitTiff file of the look version that hides Info of two or four needs, be put in GRT grating identification invisible graph software, interpolation hides Info, and sets phase parameter numerical value;
By computer direct platemaking machine, output CTP tetra-look formes;
With four colour offset press, carry out four-color process;
With grating release film, observe.
Further, the source images in described method is packaging product to be printed, and hiding Info is the logo information of any figure, word or the company that need to select by client.
Further, described 1bitTIFF file is different from the phase place hiding Info.
Further, described by one of them, the 1bitTiff file of the look version that hides Info of two or four needs, be put in GRT grating identification invisible graph software, interpolation hides Info, and the performing step of setting phase parameter numerical value is:
Open image A, under source images label, show the essential information of hiding picture in image A square frame, image A suffix name should be .GIF file;
Logo figure or word are modified as to gray-scale map or bianry image, and logo schemes or word is black, its background is white;
GRT grating identification invisible graph software is read the pixel size of image A, i.e. pixel wide and pixels tall, and display document size;
Open image B, under the label image B of the right side, can show image, read Pixel Information and the document information of image B;
The resolution ratio of file of hiding Info is preferably identical with the resolution ratio of 1bitTIFF file after RIP screening, the size of both files relatively, the dpi of modification A figure;
Select half tone angle, Input Offset Value;
Click image B, under the interior label image B of viewing area, click left mouse button, in relevant position, add and to hide Info, and show this image center coordinate figure in x, y edit box, select to add the coordinate figure of A figure;
Observe concealment effect; If dissatisfied to concealment effect, click and cancel button, can cancel the operation of previous step, a mouse click left button on image, selects the new position that hides Info again; Again click image A, repeatedly select diverse location, can repeatedly add same hiding Info;
Preserve image B.
Further, described selection half tone angle, Input Offset Value further comprises: according to different screen angles, input different side-play amount dx, dy, in GRT grating identification invisible graph software, minimum amount of movement is 0.01mm, as benchmark, changes side-play amount.
Further, if hiding effect is pleased oneself, click and preserve so, in bitmapviewer software, check image, can see that image remains the high-definition picture obtaining after RIP, finally preserve image B, complete the interpolation hiding Info.
Another object of the present invention is to provide a kind of grating release Antiforge system that hides Info, described system comprises:
Hide Info and source images choose unit, for choosing the logo information of any figure, word or the company that need to select by client and packaging product to be printed;
Image is prepared unit, hides Info and the unit of choosing of source images is connected with described, for to the source images of choosing and hide Info and scan, spells large version, and RIP raster image processor screening is explained, obtained four 1bitTIFF images;
Setting unit hides Info, preparing unit with described image is connected, for by one of them, the look version 1bitTiff file that hides Info of two or four needs is put into GRT grating identification invisible graph software, interpolation hides Info, and sets phase parameter numerical value;
Four look forme output units, are connected with the described setting unit that hides Info, for by the image of handling well machine direct plate maker as calculated, and output CTP tetra-look formes;
Four-color process unit, is connected with described four look forme output units, for carrying out four-color process by four colour offset press;
Grating release film observation unit, be connected with described four-color process unit, for the printed matter after four look double exposures, cover the grating release film of same frequency, by rotating different angles, produce moire fringe, observe and be hidden in advance the sub-image in image, realize the hide Info antifalse effect of grating release of packing and decorating printing product surface.
Further, described image is prepared unit and is comprised:
Image scanning module, for image scanning is inputted into computer, converts digitized view data to;
Spell large version module, for the good page of layout is spelled and formed the forme format that printing machine can use;
RIP raster image processor screening explanation module, for the lattice information that becomes CTP to record various images, figure and the literal interpretation of the computer manufacture space of a whole page, then control CTP system by image lattice information recording on CTP forme.
Further, the setting unit that hides Info described in comprises:
Add the module that hides Info, for the look version 1bitTiff file that needs are hidden Info, be put into GRT grating identification invisible graph software, interpolation hides Info;
Phase parameter setting value module, for arranging 1bitTIFF file and the phase place hiding Info.
Further, what the line number of described grating release film can stepless variation, the screening frequency according to concealed video text, arranges arbitrarily; The chequered with black and white ratio of grating release film also can be deep or light according to the tone of source images, arranges arbitrarily; During release, the frequency of grating release film must be corresponding with the frequency of original image, when both meet Shi Caineng, presents implicit information.
Grating release method for anti-counterfeit and the system of hiding Info provided by the invention, can directly pass through normal mode of printing (offset lithography, flexographic printing, intaglio printing, metal offset lithography, serigraphy, digital printing) realize, can be used for any stock surface (paper, cardboard, plastic sheeting, tinplate etc.), do not increase any production cost, concealed video text can only detect by specific gratings release film, simple and practical, have wide range of applications, the surface decoration that can be used for packing articles is false proof, marketable securities false proof, publication false proof, it is false proof that simulation art work copies, also can combine with other anti-counterfeiting technology, on identical product, use and form combination anti-fake technology, grating anti-counterfeiting technology takes product false proof content to carry out the stealthy processing of figure, by grating release film, show implicit pattern, there is very high disguise and security, concealed video text can not be by amplifying, scanning, copy and reprint, otherwise can lose, hide Info, there is anti-scanning and copy function formidably, the software hiding Info is added in being specifically designed to of independent research, software itself is independent operating, do not need special installation environment, friendly interface, simple to operate, reduced the interference of human factor, the concealment effect that has effectively guaranteed each information is identical, production efficiency is higher, the grating release film that observation hides Info adopts graphic making Software for Design to complete, this grating release film is in fact a slit grating release film, line number can be realized stepless variation according to the screen frequency of source images, chequered with black and white ratio also can arrange arbitrarily according to the deep or light situation of source images tone, grating release film production method, to use the technique that goes out the film in traditional printing plate-making, output release film, each printing enterprise can accomplish, production and use cost have been reduced, the grating release film of independent research, really realized the antiforge function of opening different locks with different keys, be applicable to traditional printing and digital printing, also be applicable to digital printed and plate-making simultaneously, with CTP (CTP system), directly export CTP tetra-look formes, improved production efficiency, the needs of digital printed plate-making have been met, also be the mainstream development direction of printing technology, can stop counterfeit and shoddy goods from source comes into the market, for enterprise cracks down on counterfeit goods and safeguards that consumer's interests provide very big facility, can improve the scientific and technological content of Packaging and Printing Enterprises product, the service theory of enterprise and corporate culture.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the false proof method of grating release that hides Info that provides of the embodiment of the present invention;
Fig. 2 is the flow chart of the using method of the GRT grating identification invisible graph software that provides of the embodiment of the present invention;
Fig. 3 is the structured flowchart of the grating release Antiforge system that hides Info that provides of the embodiment of the present invention.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, and be not used in restriction invention.
Fig. 1 is the realization flow of the false proof method of grating release that hides Info that provides of the embodiment of the present invention.
The method comprises the following steps:
In step S101, choose source images and hide Info;
In step S102, image is scanned, spell large version, then explain through RIP raster image processor screening, obtain four 1bitTIFF images;
In step S103, by one of them, the 1bitTiff file of the look version that hides Info of two or four needs, be put in GRT grating identification invisible graph software, interpolation hides Info, and sets phase parameter numerical value;
In step S104, by computer direct platemaking machine, output CTP tetra-look formes;
In step S105, with four colour offset press, carry out four-color process;
In step S106, with grating release film, observe.
In embodiments of the present invention, the source images in the method is packaging product to be printed, and hiding Info is the logo information of any figure, word or the company that need to select by client.
In embodiments of the present invention, 1bitTIFF file is different from the phase place hiding Info, on printed matter after four look double exposures, while covering the grating release film of same frequency, by rotating different angles, can produce moire fringe, can clearly see the sub-image being hidden in advance in image, finally realize the hide Info antifalse effect of grating release of packing and decorating printing product surface.
As described in Figure 2, in embodiments of the present invention, the using method of GRT grating identification invisible graph software comprises the following steps:
In step S201, open image A;
In step S202, open image B;
In step S203, select half tone angle, Input Offset Value;
In step S204, click image B, select to add the coordinate figure of A figure;
In step S205, observe concealment effect;
In step S2051, if dissatisfied to concealment effect, click and cancel button, can cancel the operation of previous step, a mouse click left button on image, selects the new position that hides Info again;
In step S2052, again click image A, repeatedly select diverse location, can repeatedly add same hiding Info;
In step S206, preserve image B.
In embodiments of the present invention, when opening image A, under source images label, in image A square frame, show the essential information of hiding picture, image A suffix name should be .GIF file, before GRT grating identification invisible graph software is processed it, should first logo figure or word be modified as to gray-scale map or bianry image, and logo figure or word are black, its background is white, GRT grating identification invisible graph software can be read the pixel size of image A, i.e. pixel wide and pixels tall, and also can display document size;
When opening image B, under the label image B of the right side, can show image, the same with image A, also can read Pixel Information and the document information of image B.The resolution ratio of file of hiding Info is preferably identical with the resolution ratio of 1bitTIFF file after RIP screening, the size of both files relatively, the dpi of modification A figure;
Selecting half tone angle, during Input Offset Value, according to different screen angles, input different side-play amount dx, dy, in GRT grating identification invisible graph software, minimum amount of movement is 0.01mm, as benchmark, changes side-play amount;
When clicking image B, while selecting to add the coordinate figure of A figure, under the interior label image B of viewing area, click left mouse button, in relevant position, add and hide Info, and show this image center coordinate figure in x, y edit box;
When observing concealment effect, if dissatisfied to concealment effect, click and cancel button, can cancel the operation of previous step, a mouse click left button on image, selects the new position that hides Info again; Again click image A, repeatedly select diverse location, can repeatedly add same hiding Info;
When preserving image B, if hiding effect is pleased oneself, click and preserve so, in bitmapviewer software, check image, can see that image remains the high-definition picture obtaining after RIP, finally preserve image B, complete the interpolation hiding Info.
Fig. 3 shows the structure of the grating release Antiforge system that hides Info that the embodiment of the present invention provides.For convenience of explanation, only show part related to the present invention.
Hide Info and source images choose unit 31, for choosing the logo information of any figure, word or the company that need to select by client and packaging product to be printed;
Image is prepared unit 32, and hides Info and the unit 31 of choosing of source images is connected, and for to the source images of choosing and hide Info and scan, spells large version, and RIP raster image processor screening is explained, obtained four 1bitTIFF images;
Setting unit 33 hides Info, preparing unit 32 with image is connected, for by one of them, the look version 1bitTiff file that hides Info of two or four needs is put into GRT grating identification invisible graph software, interpolation hides Info, and sets phase parameter numerical value;
Four look forme output units 34, are connected with the setting unit that hides Info, for by the image of handling well machine direct plate maker as calculated, and output CTP tetra-look formes;
Four-color process unit 35, is connected with four look forme output units 34, for carrying out four-color process by four colour offset press;
Grating release film observation unit 36, be connected with four-color process unit 35, for the printed matter after four look double exposures, cover the grating release film of same frequency, by rotating different angles, produce moire fringe, observe and be hidden in advance the sub-image in image, realize the hide Info antifalse effect of grating release of packing and decorating printing product surface.
In embodiments of the present invention, image is prepared unit 32 and is comprised:
Image scanning module 321, for image scanning is inputted into computer, converts digitized view data to;
Spell large version module 323, for the good page of layout is spelled and formed the forme format that printing machine can use;
RIP raster image processor screening explanation module 323, for the lattice information that becomes CTP to record various images, figure and the literal interpretation of the computer manufacture space of a whole page, then control CTP system by image lattice information recording on CTP forme.
In embodiments of the present invention, the setting unit 33 that hides Info comprises:
Add the module 331 that hides Info, for the look version 1bitTiff file that needs are hidden Info, be put into GRT grating identification invisible graph software, interpolation hides Info;
Phase parameter setting value module 332, for arranging 1bitTIFF file and the phase place hiding Info.
In embodiments of the present invention, what the line number of grating release film can stepless variation, the screening frequency according to concealed video text, arranges arbitrarily; The chequered with black and white ratio of grating release film also can be deep or light according to the tone of source images, arranges arbitrarily; During release, the frequency of grating release film must be corresponding with the frequency of original image, when both meet Shi Caineng, presents implicit information.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
Hide Info and source images choose unit 31, choose source images and hide Info, source images is packaging product to be printed, hiding Info is the logo information of any figure, word or the company that need to select by client; Then through image, prepare the image scanning module 321 in unit 32, image scanning is inputted into computer, convert digitized view data to and preserve and use; Spell large version module 322, the good page of layout is spelled and formed the forme format that printing machine can use; RIP raster image processor screening explanation module 323, the lattice information that becomes printer or film setter to record various images, figure and literal interpretation in the computer manufacture space of a whole page, then control printer or film setter image lattice information recording, on paper or on film, is obtained to four 1bitTIFF images; Setting unit 33 hides Info, by one of them, the 1bitTiff file of the look version that hides Info of two or four needs, be put in GRT grating identification invisible graph software, through adding the module 331 that hides Info, add to this look version 1bitTiff file and hide Info (information such as logo that can be figure, word or company), then set the numerical value such as phase parameter by phase parameter setting value module 332; Four look forme output units 34, for by the image of handling well machine direct plate maker (CTP) as calculated, output CTP tetra-look formes; Four-color process unit 35, carries out four-color process with four colour offset press; Grating release film observation unit 36, on the printed matter after four look double exposures, cover the grating release film of same frequency, by rotating different angles, can produce moire fringe, can clearly see the sub-image being hidden in advance in image, finally realize the hide Info antifalse effect of grating release of packing and decorating printing product surface.
The grating release Antiforge system that hides Info that the embodiment of the present invention provides, mainly comprise: GRT grating identification invisible graph software and grating release film, image is through overscanning, spell large version, after RIP raster image processor screening is explained, obtain four 1bitTIFF images, by one of them, the 1bitTiff file of two or four the look versions that need to hide Info, be put in GRT grating identification invisible graph software, it (can be figure that interpolation hides Info, the information such as logo of word or company), and set the numerical value such as phase parameter, because 1bitTIFF file is different from the phase place hiding Info, on printed matter after four look double exposures, while covering the grating release film of same frequency, can produce moire fringe, can clearly see the sub-image being hidden in advance in image, finally realize the hide Info antifalse effect of grating release of packing and decorating printing product surface.
Utilize GRT grating identification invisible graph software in coloured image, to add the function that hides Info and use grating release film to identify, and independent research GRT grating identification invisible graph software, easy to operate, be easy to learn and use, reduced and repeated worry and the waste of time bringing, the 1bitTiff file of the look version that only needs need be hidden Info, is put in GRT grating identification invisible graph software, interpolation hides Info, and can complete after setting phase parameter; Be applied in commodity packaging embellish and pressing product surfaces, can meet spell after large version hide Info add, be applicable to the needs of printing large-scale production, can meet the production efficiency of printing enterprise; Know clearly a kind of specific gratings release film of applicable distinct line number of independent research, the line number of this grating release film can stepless variation, according to the screening frequency of concealed video text, arrange arbitrarily: the chequered with black and white ratio of grating release film can arrange arbitrarily (as few in Hei Duobai, or Bai Duohei is few); Grating release film low price.Utilize the equipment laser photocomposing machine output monochrome film that goes out film in printing to generate parallel slits grating, price is the price of ten parts (even 1/tens) of PET grating release film material; During release, the frequency of grating release film must be corresponding with the frequency of former figure, when both meet Shi Caineng, presents implicit information, real realization " opening different locks with different keys "; Color copy machine and digital scanner all cannot copy this anti-fake mark, after copying, can lose the anti-counterfeiting information including, and have effectively prevented from being scanned; This system can realize by normal mode of printing, does not need other special process in printing process, does not therefore need extra printing cost; By computer direct platemaking machine, output CTP tetra-look formes, carry out four-color process by the mode of traditional offset printing, and CTP technology is digital plate-making equipment advanced in current printing industry, is progressively replacing film; Due to this product be utilize software mode by Information hiding in digital document, therefore hiding information is circumscribed not, can be word, numeral, can be also pattern, sign etc., has wide range of applications; Can directly through normal mode of printing, realize, not increase any production cost, concealed video text can only detect by specific gratings release film.Simple and practical, have wide range of applications, the surface decoration that can be used for packing articles is false proof, false proof, the arts reproduction of false proof, the publication of marketable securities false proof, also can together use and on identical product, form combination anti-fake technology with other anti-counterfeiting technology.
Hide Info grating release method for anti-counterfeit and system that the embodiment of the present invention provides, can directly pass through normal mode of printing (offset lithography, flexographic printing, intaglio printing, metal offset lithography, serigraphy, digital printing) realize, can be used for any stock surface (paper, cardboard, plastic sheeting, tinplate etc.), do not increase any production cost, concealed video text can only detect by specific gratings release film, simple and practical, have wide range of applications, the surface decoration that can be used for packing articles is false proof, marketable securities false proof, publication false proof, it is false proof that simulation art work copies, also can combine with other anti-counterfeiting technology, on identical product, use and form combination anti-fake technology, grating anti-counterfeiting technology takes product false proof content to carry out the stealthy processing of figure, by grating release film, show implicit pattern, there is very high disguise and security, concealed video text can not be by amplifying, scanning, copy and reprint, otherwise can lose, hide Info, there is anti-scanning and copy function formidably, the software hiding Info is added in being specifically designed to of independent research, software itself is independent operating, do not need special installation environment, friendly interface, simple to operate, reduced the interference of human factor, the concealment effect that has effectively guaranteed each information is identical, production efficiency is higher, the grating release film that observation hides Info adopts graphic making Software for Design to complete, this grating release film is in fact a slit grating release film, line number can be realized stepless variation according to the screen frequency of source images, chequered with black and white ratio also can arrange arbitrarily according to the deep or light situation of source images tone, grating release film production method, to use the technique that goes out the film in traditional printing plate-making, output release film, each printing enterprise can accomplish, production and use cost have been reduced, the grating release film of independent research, really realized the antiforge function of opening different locks with different keys, be applicable to traditional printing and digital printing, also be applicable to digital printed and plate-making simultaneously, with CTP (CTP system), directly export CTP tetra-look formes, improved production efficiency, the needs of digital printed plate-making have been met, also be the mainstream development direction of printing technology, can stop counterfeit and shoddy goods from source comes into the market, for enterprise cracks down on counterfeit goods and safeguards that consumer's interests provide very big facility, can improve the scientific and technological content of Packaging and Printing Enterprises product, the service theory of enterprise and corporate culture.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. the false proof method of grating release that hides Info, is characterized in that, the method comprises the following steps: choose source images and hide Info; Image is scanned, spell large version, then explain through RIP raster image processor screening, obtain four 1bitTIFF images; By one of them, the 1bitTiff file of the look version that hides Info of two or four needs, be put in GRT grating identification invisible graph software, interpolation hides Info, and sets phase parameter numerical value; By computer direct platemaking machine, output CTP tetra-look formes; With four colour offset press, carry out four-color process; With grating release film, observe;
Source images in described method is packaging product to be printed, and hiding Info is the logo information of any figure, word or the company that need to select by client;
Described 1bitTIFF file is different from the phase place hiding Info;
Described by one of them, the 1bitTiff file of the look version that hides Info of two or four needs, be put in GRT grating identification invisible graph software, interpolation hides Info, and the performing step of setting phase parameter numerical value is: open image A, under source images label, in image A square frame, show the essential information of hiding picture, image A suffix name is .GIF file; Logo figure or word are modified as to gray-scale map or bianry image, and logo schemes or word is black, its background is white; GRT grating identification invisible graph software is read the pixel size of image A, i.e. pixel wide and pixels tall, and display document size; Open image B, under the label image B of the right side, can show image, read Pixel Information and the document information of image B; The resolution ratio of file that hides Info is identical with the resolution ratio of 1bitTIFF file after RIP screening, and the size of both files is relatively revised the dpi of A figure; Select half tone angle, Input Offset Value; Click image B, under the interior label image B of viewing area, click left mouse button, in relevant position, add and to hide Info, and show this image center coordinate figure in x, y edit box, select to add the coordinate figure of A figure; Observe concealment effect; If dissatisfied to concealment effect, click and cancel button, can cancel the operation of previous step, a mouse click left button on image, selects the new position that hides Info again; Again click image A, repeatedly select diverse location, can repeatedly add same hiding Info; Preserve image B;
Described selection half tone angle, Input Offset Value further comprises: according to different screen angles, input different side-play amount dx, dy, in GRT grating identification invisible graph software, minimum amount of movement is 0.01mm, as benchmark, changes side-play amount;
If hiding effect is pleased oneself, click and preserve so, in bitmapviewer software, check image, can see that image remains the high-definition picture obtaining after RIP, finally preserve image B, complete the interpolation hiding Info.
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| CN104228380B (en) * | 2013-06-21 | 2016-12-28 | 广州市人民印刷厂股份有限公司 | Invisible open locking-type method for anti-counterfeit |
| CN104391663B (en) * | 2013-08-21 | 2017-11-28 | 北大方正集团有限公司 | One lattice file output control system and method |
| CN103802517B (en) * | 2014-02-19 | 2017-07-11 | 湖南工业大学 | A kind of grating anti-counterfeiting technology based on point shape |
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