CN103997591A - Invisible code graphics, processing method thereof and anti-fake application - Google Patents
Invisible code graphics, processing method thereof and anti-fake application Download PDFInfo
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Abstract
The invention discloses invisible code graphics, a processing method of the invisible code graphics and anti-fake application and belongs to the field of information processing. The processing method includes a processing method with the image hiding technology and the coding technology combined. Images are divided into two parts, two different screening manners are adopted for screening the two parts of the images respectively, amplitude-modulating screening is conducted on an information hiding part, frequency modulating screening is conducted on the other part of the images, and meanwhile coding information is recorded according to the sequence of exposing pixel points in a grid of an area needing information hiding so that the purpose of information hiding can be achieved. The hidden code graphics serves as anti-fake labels, after the labels are copied by a common copying machine, the images with amplitude-modulating dot screening can be well shown, however, the images with amplitude-modulating dot screening cannot be completely shown, and therefore the code graphics can be shown and initial fake prevention is achieved. Meanwhile, buried coded messages can be obtained through an image sensor, and therefore authenticity is identified after the coded messages are compared with content on certificates and securities.
Description
Technical field
The present invention relates to field of information processing, particularly a kind of hidden code figure and processing method and Application in Anti-counterfeiting, its processing method comprises hiding of coded graphics and imbedding of coded message.
Background technology
Bar code for the bar code of recorded information the earliest, it represents 1 by black region, white portion represents that 0 carrys out recorded information, because the amount of information of record is little, there is afterwards two-dimensional bar code, two-dimensional bar code is that development comes on the basis of bar code, although there is improved place, contain much information as recordable, but still left over the shortcoming of bar code, as still represented 1 by black square, white square represents that 0 carrys out recorded information, and need special position to print bar code, affect the attractive in appearance of printed matter.Bar code can be replicated simultaneously, is not suitable for false proof.
Having the method for appearing ground-tint in one's mind in background printing, just can distinguish true from false by common photocopier, is the low effective method for anti-counterfeit of a kind of cost, but this method can not thoroughly solve the problem of forgery, can only serve as auxiliary false proof means.
Screen coding anti-counterfeiting is a kind of digital anti-fake method prevailing in recent years, by utilizing screen characteristic, after realizing bulk information and imbedding, does not affect again the effect of picture quality.In existing half-tone screen code technology, the information module of recorded information is by specific size, given shape, one group of dot matrix composition of specific direction, in the time imbedding information, conventionally can not be completely and the gray value of original image site correspondence one by one, therefore, the quality of image can be subject to certain impact.
Summary of the invention
For overcoming the shortcoming and defect of prior art, primary and foremost purpose of the present invention is to provide a kind of processing method of hidden code figure, the treating method comprises the processing method that image concealing technology is combined with coding techniques, image is divided into two parts, need to imbed the part of information and not need the part of the information of imbedding, adopt two kinds of different meshing method respectively this two parts image to be carried out to screening, information is buried to part and carry out am screening, image other parts are carried out to fm screening, simultaneously by the order that needs information to bury the exposure of pixel in area grid is carried out to record coding information, the object that the information of realization is buried.
The hidden code figure that provides above-mentioned processing method to obtain is provided.
The application of the hidden code figure that a further object of the present invention is to provide above-mentioned acquisition in anti-counterfeiting technology.The hidden code figure that the present invention obtains has anti-duplicating simultaneously, and the function of electronic recognition.
Object of the present invention realizes by following technical scheme: a kind of processing method of hidden code figure, comprises hiding of coded graphics and imbedding of coded message.
Through hiding coded graphics, as anti-counterfeiting mark, after common photocopier duplicates, the image of amplitude screening can be good at reproducing, and the image of frequency-modulation halftone dot screening can not manifest completely, therefore can manifest coded graphics, plays tentatively false proof; Meanwhile, by imageing sensor, can obtain the coded message of imbedding, thereby and certificate, after the content contrast on security, discern the false from the genuine.
After above-mentioned coded graphics can be original image binaryzation, the black region obtaining or white portion.
Above-mentioned coded message can be correlated series number or have text of Special Significance etc.
A processing method for hidden code figure, comprises the following steps:
(1) image that need to imbed information is carried out to binary conversion treatment, the image after binaryzation divides white and black two parts that indicate of serving as reasons;
(2) coded graphics of white parts of images for information buried will be masked as; Be masked as black parts of images as image shading part;
(3) get and two gray scale color lumps that in step (1), image size is identical, the gray value span of gray scale color lump is 0～255;
(4) one of them gray scale color lump is carried out after fm screening, get shallow merging with image shading part;
(5) another gray scale color lump and coded graphics are got after shallow merging, carried out screening by am screening site generating mode and realize imbedding of coded message;
(6) the merging figure of step (4) and (5) acquisition is got to dark merging and obtain hidden code figure.
The image that need to imbed information described in step (1), is preferably gray-scale map;
Coded message described in step (2) is to comprise correlated series number, have text of Special Significance etc.;
Described in step (4) and (5), get shallow merging, refer to that in two color lumps that merge, lap is got the color lump gray value that gray value is less;
Am screening site generating mode described in step (5) is the one in threshold method, modelling, growth model method or double negate method; Be preferably growth model method; Described growth model method is that laser explosure point starts growth by grid element center, to the regular diffusion of surrounding;
Coded message described in step (5) imbed the gray value being preferably according to coded graphics, selection information is described module, carries out the input of information, and information is imbedded in image;
Described information is described module, is that the different order being generated by exposure point is carried out recorded information; Be preferably by least two kinds in following three kinds of different exposure point genesis sequence codings and combine;
The generating mode of three kinds of described different exposure point genesis sequence codings is as follows:
1) since the upper left side of a grid cell, from left to right, fill from top to bottom;
2) since the lower right of a grid cell, from right to left, fill from bottom to top;
3) am screening Zhong center growth method.
The principle of imbedding of above-mentioned coded message is: by the gray scale of first exposure point and last exposure point in comparison grid, or relatively first exposure point and center exposure point, or the relatively gray scale of last exposure point and center exposure point, site can be distinguished, therefore can realize coding by changing different sites exposure order.
Described in step (6), get dark merging, refer to the figure merging, lap is got the color lump gray value that gray value is larger.
Hidden code figure described in step (6) is made up of fm screening district and the am screening district that imbeds information;
A kind of hidden code figure obtains by above-mentioned processing method.
Above-mentioned hidden code figure is applied aspect anti-counterfeiting technology, and application mode is specially: the hidden code figure of above-mentioned acquisition is duplicated after output, can manifest hiding image, realize the identification of coded graphics.
The described duplicating way of output is to realize by the one in the multiple mode of printings such as ink jet printing, laser printing, stylus printing, hot transfer printing, offset printing or gravure.
The principle of above-mentioned anti-counterfeiting technology application is: because amplitude is larger than frequency-modulation halftone dot, after duplicating, the image of amplitude screening can be good at reproducing, and the image of frequency-modulation halftone dot screening can not manifest completely, therefore can manifest hiding image, realize the identification of coded graphics.
The principle that in the present invention, the coded message of hidden code image is imbedded is as follows:
In the process that original image transforms to halftoned image, the resolution of establishing original copy is G, and output equipment resolution is g, and m is the number of binarized pixel in a site cell height, and the number γ of the original copy pixel that unit, a site is corresponding is by formula
given.From original copy upper left side, longitudinally getting every γ pixel, to carry out gray value average, and establishing the wherein gray value of any one pixel is R
i, try to achieve average ash by formula
degree value
this value determines the position that should fill while generation in site.By the average gray value of original image (0 to 2
b-1 interval) adjust to that 1 to m × n numerical value is interval to be represented, the gray value after representing to adjust with R, uses
represent linearization relational matrix, drawn by formula:
R round off round numbers, and finding out in the generation model of site, the filling sequence number identical with this value, fill the sequence number position that is less than or equal to this value, and does not fill the sequence number position that is greater than this value.
Exposure point genesis sequence in described site generation model, it can be the upper left side since a grid cell, from left to right, fill from top to bottom, also can be since the lower right of a grid cell, from right to left, fill from bottom to top, and any mode in the growth method of am screening Zhong center.
Described exposure point is the part of site, and site is the unit of represent images contrast color, and essence is in the grid of an information dot matrix, carrys out representing gradation level by the number of stain; We are referred to as pixel the stain here.
Described hidden code figure is described module according to the difference of recorded information by several information and is formed, and it is the part of hidden code figure that described information is described module;
Described information dot matrix is the dot matrix for describing information.
The present invention has following advantage and effect with respect to prior art:
1. the present invention proposes coded image is hidden and coded message is imbedded in image, make image there is the function of anti-duplicating and electronic recognition.
2. the present invention proposes by the order that needs information to bury the exposure of stain in area grid is carried out to record coding information the object that the information of realization is buried.
3. the present invention proposes with from left to right, the mode that exposure point is filled is from top to bottom set as information " 0 ", center growth method exposure point filling mode is set as information " 1 ", or from right to left, exposure point filling mode is set as information " 0 " from bottom to top, center growth method exposure point filling mode is set as information " 1 ", waits much information to describe module composition form.
4. hidden code image of the present invention can simply be distinguish true from false by photocopier, and also usable image transducer reads the encoding of graphs information of imbedding simultaneously, realizes antiforge function.And coded system is different from the specific size of half-tone screen code needs, given shape, one group of dot matrix of specific direction, but according to the gray value of image itself, sequential exposure pixel, thus form the coding module of certain rule, realize imbedding of information.
Brief description of the drawings
Fig. 1 is the image carrying out after binary conversion treatment;
Fig. 2 carries out the flow chart that coded graphics is hidden and information is imbedded;
Fig. 3 is am screening Zhong center growth method;
Fig. 4 is different sites exposure order;
Fig. 5 is the unit information coded graphics that the site of three kinds of different exposure order generations forms;
Fig. 6 is multi-form unit information coded graphics;
Fig. 7 is the different figure code of the am screening site of different gray scales; Wherein, A is that before the first half editor, dot matrix is arranged, and B is that after the latter half editor, dot matrix is arranged;
Fig. 8 is a kind of figure code of the am screening site of same grayscale; Wherein, A is that before the first half editor, dot matrix is arranged, and B is that after the latter half editor, dot matrix is arranged;
Fig. 9 is a kind of figure code of the fm screening site of different gray scales; Wherein, A is that before the first half editor, dot matrix is arranged, and B is that after the latter half editor, dot matrix is arranged;
Figure 10 is a kind of figure code of the fm screening site of same grayscale; Wherein, A is that before the first half editor, dot matrix is arranged, and B is that after the latter half editor, dot matrix is arranged.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
First illustrate hidden code figure anti-counterfeiting technology as an example of billing system example:
As depicted in figs. 1 and 2, be the processing method of hidden code figure of the present invention, comprising the binaryzation of image, the flow process that coded graphics is hidden and information is imbedded, concrete steps are as follows:
1) image that need to imbed information is carried out to binary conversion treatment, two parts that the image after binaryzation divides serve as reasons white (0) and black (1) to indicate;
2) will be masked as the parts of images of white (0) for the coded graphics of information buried; Be masked as the parts of images of black (1) as image shading part; The image that need to imbed information is R, and other regions are
3) given and step 1) in two identical gray scale color lumps of image size, be respectively that gray value is f
1color lump F
1, gray value is f
2color lump F
2, f
1and f
2span be respectively 0～255;
4) to gray scale color lump F
1carry out after fm screening, carry out (F1 ∩ R) with image shading part R and get shallow merging;
5) by gray scale color lump F2 and coded graphics
carry out
get after shallow merging, carry out screening by am screening site generating mode and realize imbedding of coded message;
6) by step 4) and 5) obtain image deeply merge into a sub-picture W through getting, merge formula as follows:
the image finally obtaining is divided into fm screening district and imbeds the am screening district of information.
Step 2) described in coded message be to comprise correlated series number, have text of Special Significance etc.;
Step 4) and 5) described in get shallow merging, refer to that in two color lumps that merge, lap is got the color lump gray value that gray value is less;
Step 5) described in am screening site generating mode for growth modelling; Described growth model method is that laser explosure point starts growth by grid element center, to the regular diffusion of surrounding; As shown in Figure 3, am screening Zhong center growth method, laser explosure point starts growth by grid element center, to the regular diffusion of surrounding, is the am screening of the center growth method of 15 gray values.
Step 5) described in the imbedding as according to the gray value of coded graphics of coded message, selection information is described module, carries out the input of information, and information is imbedded in image;
Described information is described module, is that the different order being generated by exposure point is carried out recorded information; Be preferably by least two kinds in following three kinds of different exposure point genesis sequence codings and combine;
Three kinds of different exposure orders as shown in Figure 5 generate site, (a) be depicted as from left to right, fill from top to bottom, (b) be depicted as from right to left, fill from bottom to top, (c) be depicted as am screening Zhong center growth method.The information that can be used as of any two combinations is wherein described module, as (a) and (b) combination, (a) is set as to information " 0 ", (b) be set as information " 1 ", or (a) is set as to information " 1 ", (b) be set as information " 0 ", can have different combinations, different information setting rules.
Multi-form unit information coded graphics as shown in Figure 6, after being combined by above-mentioned three kinds of modes, as information coding pattern independently, as wherein (b) can be set as information " 1 ", (c) can be set as information " 0 " combination and encode.Or (b) can be set as information " 0 ", and (c) can be set as information " 1 " combination and encode, can there is different combinations, different information setting rules.
The generating mode of three kinds of described different exposure point genesis sequence codings is as follows:
1) since the upper left side of a grid cell, from left to right, fill from top to bottom (as shown in Fig. 4 (a));
2) since the lower right of a grid cell, from right to left, fill from bottom to top (as shown in Fig. 4 (b));
3) am screening Zhong center growth method (as shown in Figure 3).
The principle of imbedding of above-mentioned coded message is: by the gray scale of first exposure point and last exposure point in comparison grid, or relatively first exposure point and center exposure point, or the relatively gray scale of last exposure point and center exposure point, site can be distinguished, therefore can realize coding by changing different sites exposure order.
Step 6) described in get dark merging, refer to the figure merging, lap is got the color lump gray value that gray value is larger.
As shown in Figure 7, for the different figure code of the am screening site of different gray scales, the first half of every width figure is that the dot matrix before coding is arranged, the latter half is that the dot matrix that adopts different coded messages to describe after module is encoded is arranged, (a) in, adopt from left to right, the mode that exposure point is filled is from top to bottom set as information " 0 ", and from right to left, exposure point filling mode is set as information " 1 " from bottom to top; (b) in, adopt from left to right, the mode that exposure point is filled is from top to bottom set as information " 0 ", and center growth method exposure point filling mode is set as information " 1 "; (c) in, adopt from left to right, the mode that exposure point is filled is from top to bottom set as information " 1 ", and center growth method exposure point filling mode is set as information " 0 "; (d) in, adopt, center growth method exposure point filling mode is set as information " 0 "; (e) in, adopt from right to left, exposure point filling mode is set as information " 0 " from bottom to top, and center growth method exposure point filling mode is set as information " 1 "; (f) in, adopt from right to left, exposure point filling mode is set as information " 1 " from bottom to top, and from left to right, the mode that exposure point is filled is from top to bottom set as information " 0 ".
As shown in Figure 8, be a kind of figure code of the am screening site of same grayscale; It shown in Fig. 9, is a kind of figure code of the fm screening site of different gray scales; It shown in Figure 10, is a kind of figure code of the fm screening site of same grayscale, the first half A of each figure is that the dot matrix before coding is arranged, the latter half B is employing from right to left, exposure point filling mode is set as information " 0 " from bottom to top, from right to left, from bottom to top exposure point filling mode be set as information " 1 " dot matrix arrange.
Above-mentioned hidden code figure is applied aspect anti-counterfeiting technology, and application mode is specially: the hidden code figure of above-mentioned acquisition is duplicated after output, can manifest hiding image, realize the identification of coded graphics.
The described duplicating way of output is to realize by the one in the multiple mode of printings such as ink jet printing, laser printing, stylus printing, hot transfer printing, offset printing or gravure.
The identification of above-mentioned hidden code figure: amplitude is generally large than frequency-modulation halftone dot, after duplicating, the image of amplitude screening can be good at reproducing, and the image of frequency-modulation halftone dot screening can not manifest completely, therefore can manifest hiding image.
And, can scan image by imageing sensor, the coded image reading is carried out to two-value processing, calculate the position of coded graphics, then describe rule by each information dot matrix, identify code value, read information buried.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a processing method for hidden code figure, is characterized in that comprising the following steps:
(1) image that need to imbed information is carried out to binary conversion treatment, the image after binaryzation divides white and black two parts that indicate of serving as reasons;
(2) coded graphics of white parts of images for information buried will be masked as; Be masked as black parts of images as image shading part;
(3) get and two gray scale color lumps that in step (1), image size is identical, the gray value span of gray scale color lump is 0～255;
(4) one of them gray scale color lump is carried out after fm screening, get shallow merging with image shading part;
(5) another gray scale color lump and coded graphics are got after shallow merging, carried out screening by am screening site generating mode and realize imbedding of coded message;
(6) the merging figure of step (4) and (5) acquisition is got to dark merging and obtain hidden code figure.
2. the processing method of hidden code figure according to claim 1, is characterized in that: the image that need to imbed information described in step (1) is gray-scale map.
3. the processing method of hidden code figure according to claim 1, is characterized in that: the coded message described in step (2) is the text that comprises correlated series number or have Special Significance.
4. the processing method of hidden code figure according to claim 1, it is characterized in that: described in step (4) and (5), get shallow merging, refer to that in two color lumps that merge, lap is got the color lump gray value that gray value is less.
5. the processing method of hidden code figure according to claim 1, is characterized in that: am screening site generating mode described in step (5) is the one in threshold method, modelling, growth model method or double negate method.
6. the processing method of hidden code figure according to claim 1, it is characterized in that: the imbedding as according to the gray value of coded graphics of the coded message described in step (5), selection information is described module, carries out the input of information, and information is imbedded in image;
Described information is described module, for combining by least two kinds in following three kinds of different exposure point genesis sequence codings;
The generating mode of three kinds of described different exposure point genesis sequence codings is as follows:
1) since the upper left side of a grid cell, from left to right, fill from top to bottom;
2) since the lower right of a grid cell, from right to left, fill from bottom to top;
3) am screening Zhong center growth method.
7. the processing method of hidden code figure according to claim 1, is characterized in that: described in step (6), get dark merging, refer to the figure merging, lap is got the color lump gray value that gray value is larger.
8. a hidden code figure obtains by the processing method described in claim 1～7 any one.
9. hidden code image claimed in claim 8 is applied aspect anti-counterfeiting technology.
10. application according to claim 9, is characterized in that: the hidden code figure of acquisition is duplicated after output, can manifest hiding image, realize the identification of coded graphics;
The described duplicating way of output is to realize by the one in ink jet printing, laser printing, stylus printing, hot transfer printing, offset printing or gravure.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589921A (en) * | 2017-08-25 | 2018-01-16 | 李晓妮 | The generation method and device of a kind of shading-duplication preventing |
| CN108600577A (en) * | 2018-07-04 | 2018-09-28 | 合肥思博特软件开发有限公司 | Using the method for half-and-half negating method and phase modulation generation invisible graph sub-image |
| CN108898543A (en) * | 2018-07-04 | 2018-11-27 | 合肥信亚达智能科技有限公司 | A method of anti-counterfeiting information is set in the host channel of digital picture |
| CN108921768A (en) * | 2018-07-04 | 2018-11-30 | 合肥信亚达智能科技有限公司 | A kind of grating method for anti-counterfeit for improving digital site and generating |
| CN108932690A (en) * | 2018-07-04 | 2018-12-04 | 合肥信亚达智能科技有限公司 | A method of improving middle tone and shadow image raster anti-counterfeiting performance |
| CN108986010A (en) * | 2018-07-04 | 2018-12-11 | 合肥思博特软件开发有限公司 | A kind of sub-image setting method expanding the contrast scope of application |
| CN109035123A (en) * | 2018-07-04 | 2018-12-18 | 合肥信亚达智能科技有限公司 | A kind of hiding information embedding grammar suitable for middle tone and shadow host image |
| CN109532203A (en) * | 2018-10-19 | 2019-03-29 | 中丰田光电科技(珠海)有限公司 | A kind of multifunctional holographic pattern optical frequency variable keyline layout method and device |
| CN112292716A (en) * | 2018-06-24 | 2021-01-29 | 工业365公司 (有限责任) | Method for verifying the authenticity of a product and printed image |
| TWI747210B (en) * | 2020-03-24 | 2021-11-21 | 中央印製廠 | Method for gradually fusing heterogeneous network points in the same tone to form an anti-counterfeiting network point structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6263086B1 (en) * | 1998-04-15 | 2001-07-17 | Xerox Corporation | Automatic detection and retrieval of embedded invisible digital watermarks from halftone images |
| CN1882026A (en) * | 2005-05-12 | 2006-12-20 | 顾泽苍 | Method of generating information embedded halftone screen code |
| CN1928916A (en) * | 2006-08-21 | 2007-03-14 | 顾泽苍 | Printing medium certificate documents and false proof handling method of copy thereof |
| CN101097504A (en) * | 2006-06-28 | 2008-01-02 | 顾泽苍 | Method for embedding information on upper printed medium |
| CN101867680A (en) * | 2008-10-20 | 2010-10-20 | 海德堡印刷机械股份公司 | Be used for half tone image is carried out the method for digital screening |
| CN102411717A (en) * | 2010-09-25 | 2012-04-11 | 顾泽苍 | Digital anti-counterfeit printing processing method |
| TW201322174A (en) * | 2011-11-22 | 2013-06-01 | Univ Nat Taiwan Normal | The watermarking method of altering document's content after duplication |
-
2014
- 2014-05-09 CN CN201410196922.4A patent/CN103997591A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6263086B1 (en) * | 1998-04-15 | 2001-07-17 | Xerox Corporation | Automatic detection and retrieval of embedded invisible digital watermarks from halftone images |
| CN1882026A (en) * | 2005-05-12 | 2006-12-20 | 顾泽苍 | Method of generating information embedded halftone screen code |
| CN101097504A (en) * | 2006-06-28 | 2008-01-02 | 顾泽苍 | Method for embedding information on upper printed medium |
| CN1928916A (en) * | 2006-08-21 | 2007-03-14 | 顾泽苍 | Printing medium certificate documents and false proof handling method of copy thereof |
| CN101867680A (en) * | 2008-10-20 | 2010-10-20 | 海德堡印刷机械股份公司 | Be used for half tone image is carried out the method for digital screening |
| CN102411717A (en) * | 2010-09-25 | 2012-04-11 | 顾泽苍 | Digital anti-counterfeit printing processing method |
| TW201322174A (en) * | 2011-11-22 | 2013-06-01 | Univ Nat Taiwan Normal | The watermarking method of altering document's content after duplication |
Non-Patent Citations (5)
| Title |
|---|
| 和萌: "基于混合加网的半色调水印技术研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 杨国颖等: "网点形状与平版印刷的关系", 《甘肃科技》 * |
| 许军: "基于网屏编码的信息隐藏方法研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 郭淳学: "网屏编码技术介绍", 《电子技术应用》 * |
| 陈永常: "《现代印刷技术》", 30 September 2003, 化学工业出版社 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589921A (en) * | 2017-08-25 | 2018-01-16 | 李晓妮 | The generation method and device of a kind of shading-duplication preventing |
| CN112292716A (en) * | 2018-06-24 | 2021-01-29 | 工业365公司 (有限责任) | Method for verifying the authenticity of a product and printed image |
| CN108600577A (en) * | 2018-07-04 | 2018-09-28 | 合肥思博特软件开发有限公司 | Using the method for half-and-half negating method and phase modulation generation invisible graph sub-image |
| CN108898543A (en) * | 2018-07-04 | 2018-11-27 | 合肥信亚达智能科技有限公司 | A method of anti-counterfeiting information is set in the host channel of digital picture |
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| CN109035123A (en) * | 2018-07-04 | 2018-12-18 | 合肥信亚达智能科技有限公司 | A kind of hiding information embedding grammar suitable for middle tone and shadow host image |
| CN109532203A (en) * | 2018-10-19 | 2019-03-29 | 中丰田光电科技(珠海)有限公司 | A kind of multifunctional holographic pattern optical frequency variable keyline layout method and device |
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Application publication date: 20140820 |