CN101770589A - Method for carrying out image-text hiding according to encrypted and converted phase position - Google Patents
Method for carrying out image-text hiding according to encrypted and converted phase position Download PDFInfo
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- CN101770589A CN101770589A CN200910273515A CN200910273515A CN101770589A CN 101770589 A CN101770589 A CN 101770589A CN 200910273515 A CN200910273515 A CN 200910273515A CN 200910273515 A CN200910273515 A CN 200910273515A CN 101770589 A CN101770589 A CN 101770589A
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Abstract
The invention discloses a method for carrying out image-text hiding according to an encrypted and converted phase position. The method includes the following steps: a Fresnel diffraction converting method is adopted to carry out encryption and conversion on an image-text to be hidden, so as to obtain a black-and-white stripe pattern namely a phase information pattern which is composed by the encrypted and converted phase position; on the basis of the phase information pattern, the image-text to be hidden is respectively hidden in an encoding card and a decoding card; when the encoding card and the decoding card are overlapped and aligned with each other, the hidden image-text can reappear. As the pattern of image-text information hidden in the cards is stripe-shaped, the overlapping and aligning operations of the encoding card and the decoding card can be easily realized when in reappearing; moreover, as different image-texts have different stripe shapes, the counterfeiting difficulty is enhanced and the anti-counterfeiting strength is enhanced as well. As the image-text information hidden on the decoding card or the encoding card presents the form of grating stripes of the phase information pattern, the effect of optical diffraction is achieved and the image-text hidden on the decoding card and the encoding card can reappear by laser. Anti-counterfeiting logos manufactured by the method for the two cards cannot be easily counterfeited, and the anti-counterfeiting strength is greatly enhanced.
Description
Technical field
The invention belongs to anti-counterfeiting technology, be specifically related to a kind ofly carry out the method for image-text hiding, can be used for double-card antifake sign according to the phase place of enciphering transformation.The part graph text information of hiding according to the phase place of enciphering transformation is arranged respectively on the coding and decoding card, and the decoding card can the hiding picture and text of clear reproduction with the coding card overlapping alignment.
Background technology
Traditional double-card antifake sign is to utilize optics More principle, the i.e. overlapping principle that produces the third periodic structure of the striped of two kinds of periodic structures, change its phase and the pattern of encoding in a kind of therein periodicity striped, this pattern is can not differentiating of hiding at ordinary times, and pattern displays when the cycle, striped was overlapping with another kind.This method is imitated easily because the modulation of striped is fairly simple, and anti-counterfeiting power is lower.
The encrypted image double-card antifake sign that a kind of stochastic distribution is arranged, the pattern of the hidden image information on its decoding card and coding card is a dot pattern, the decoding card is relatively more difficult with aiming at of coding card when reproducing operation.
Summary of the invention
The object of the present invention is to provide and a kind ofly carry out the method for image-text hiding according to the phase place of enciphering transformation, the double-card antifake sign that adopts this method to make is difficult for forging, and its anti-counterfeiting power is greatly improved.
The invention provides the method for carrying out image-text hiding according to the phase place of enciphering transformation, it is characterized in that: this method comprises the steps:
The 1st step, selected arbitrarily three measure-alike black, respectively as original background pattern A1, original check pattern B1, and contain the pattern C1 that remains to be hidden picture and text;
The 2nd step, to contain and wait that hiding picture and text carries out the Fresnel diffraction conversion among the pattern C1 that remains to be hidden picture and text, get its phase information, with values all in the phase information is that the amount of element of 0～π turns to a kind of color in the black-and-white two color, with a numeral in " 0 " and " 1 ", the amount of element of π～2 π turns to the another kind of color in the black-and-white two color, another numeral with " 0 " and " 1 ", form chequered with black and white striated pattern, Here it is waits to hide the kinoform case D of picture and text, and its size and pattern C1's is measure-alike;
The 3rd step, the numerical value of correspondence position among each point among the pattern C1 and the kinoform case D is carried out and computing, if operation result is 0, then the numerical value with the corresponding point among the pattern C1 places on the corresponding point of pattern A1 or B1 image, if operation result is 1, then the numerical value with the corresponding point among the pattern C1 places on the corresponding point of pattern B1 or A1 image;
The 4th step will be through the original background pattern A1 after the 3rd step handled as new background patterns A, original check pattern B1 after the 3rd step handled is as new check pattern B, new background patterns A is produced on coding card or the tag card, new check pattern B is produced on the see-through card, obtains decoding card or test card.
Adopt the inventive method to make double-card antifake sign, can determine graph text information the to be hidden distribution on coding card and decoding card according to the phase place of waiting to hide behind the picture and text enciphering transformation, the randomness of this distribution is bigger, anti-counterfeiting power is stronger, and the decoding card is convenient with aiming at of coding card.Because the graph text information of hiding on decoding card and the coding card presents the grating fringe form of kinoform, has the optical diffraction effect, can on decoding card or coding card, show the information of hiding with laser reconstruction.
Description of drawings
Fig. 1 is the synoptic diagram of original background pattern A1;
Fig. 2 is the synoptic diagram of original check pattern B1;
Fig. 3 is pattern C1, wherein remains the picture and text hidden, i.e. " the false proof " center " of literal shown in the figure;
Fig. 4 is a kinoform case of waiting to hide picture and text;
Fig. 5 is the background patterns A on the coding card;
Fig. 6 is the check pattern B on the test card;
Fig. 7 is the hiding picture and text that reproduce.
Embodiment
The present invention adopts the picture and text that the Fresnel diffraction transform method will be to be hidden to carry out enciphering transformation, obtains the chequered with black and white candy strip be made up of the phase place of enciphering transformation, is called the kinoform case.The kinoform case that distributes with this striped is a foundation, picture and text to be hidden are hidden in respectively in coding card and the decoding card, when decoding card and coding card overlapping alignment, can reveal the picture and text that are hidden again, because the graph text information that is hidden in coding card and the decoding card is the pattern of shape of stripes, therefore operate than the overlapping alignment of be easier to realize to decode card and coding card when reproducing, and the shape of striped makes to forge the difficulty increase that anti-counterfeiting power is improved because of the difference of hiding picture and text is different.Because the graph text information of hiding on decoding card or the coding card presents the grating fringe form of kinoform case, has the optical diffraction effect, can on decoding card or coding card, show the picture and text of hiding with laser reconstruction.
Below by by embodiment the present invention being described in further detail, but following examples only are illustrative, and protection scope of the present invention is not subjected to the restriction of these embodiment.
Provided by the inventionly carry out the method for image-text hiding, the steps include: according to the phase place of enciphering transformation
1. selected arbitrarily three width of cloth pattern Fig. 1, Fig. 2 and Fig. 3.Wherein Fig. 1 is as original background pattern A1, Fig. 2 is as original check pattern B1, and Fig. 3 is as containing the pattern C1 that remains to be hidden picture and text, and wherein A1, B1 and C1 are measure-alike black, include the picture and text that needs are hidden among the C1, " false proof " center " is an example with literal here.
2. treating among the C1 being hidden picture and text and carry out the Fresnel diffraction conversion, get its phase information, is that the amount of element of 0～π turns to black with values all in the phase information, represents with " 0 "; The amount of element of π～2 π turns to white, with " 1 " expression, forms chequered with black and white striated pattern, and Here it is treats the kinoform case D of hiding picture and text to see Fig. 4.The size of kinoform case D and pattern C1's is measure-alike.Among the pattern D density of striped with the orientation different and different with the parameter (wavelength, focal length, pixel size) of picture and text to be hidden and Fresnel diffraction conversion, shape than general Moire fringe complexity many.
3. the numerical value with correspondence position among each point among the C1 and the D carries out and computing, if operation result is 0, just the numerical value with the corresponding point among the C1 places on the corresponding point of original background pattern A1; If operation result is 1, then the numerical value with the corresponding point among the C1 places on the corresponding point of original check pattern B1, and vice versa.
Conveniently become new background patterns A through the pattern A1 that handles like this, as shown in Figure 5.
Conveniently become new check pattern B through the pattern B1 that handles like this, as shown in Figure 6.
5. the background patterns A that above step is obtained is produced on coding card or the tag card, and check pattern B is produced on the see-through card, obtains decoding card or test card.
When check pattern B on decoding card or the test card and the background patterns A overlapping alignment on coding card or the tag card, present hiding picture and text.
For the double-card antifake sign that obtains by above method, include the graph text information that part original background pattern A1 and part are hidden among the background patterns A on the tag card, include the graph text information that the original check pattern B1 of part and another part are hidden among the check pattern B on the test card.During detection, the pattern A of the pattern B of test card and tag card is overlapping, present the picture and text that are hidden behind the aligning, as shown in Figure 7.The graph text information that reproduces is hidden in respectively in the pattern of tag card and test card, and the adulterator is difficult to counterfeit.
Because the graph text information of hiding on tag card and the test card presents the grating fringe form of kinoform case, has the optical diffraction effect, can also on tag card or test card, show the picture and text of hiding with laser reconstruction.The picture and text of laser reconstruction are consistent with the picture and text that two card overlapping alignment present, and therefore this double-card antifake sign has certain novelty.
The present invention carries out the method for image-text hiding according to the phase place of enciphered message, graph text information to be hidden is hidden respectively on coding card and decoding card, the calculating parameter of enciphered message phase place can be adjusted as required, makes the hiding performance of graph text information better.
Claims (1)
1. one kind is carried out the method for image-text hiding according to the phase place of enciphering transformation, and it is characterized in that: this method comprises the steps:
The 1st step, selected arbitrarily three measure-alike black, respectively as original background pattern A1, original check pattern B1, and contain the pattern C1 that remains to be hidden picture and text;
The 2nd step, to contain and wait that hiding picture and text carries out the Fresnel diffraction conversion among the pattern C1 that remains to be hidden picture and text, get its phase information, with values all in the phase information is that the amount of element of 0～π turns to a kind of color in the black-and-white two color, with a numeral in " 0 " and " 1 ", the amount of element of π～2 π turns to the another kind of color in the black-and-white two color, another numeral with " 0 " and " 1 ", form chequered with black and white striated pattern, Here it is waits to hide the kinoform case D of picture and text, and its size and pattern C1's is measure-alike;
The 3rd step, the numerical value of correspondence position among each point among the pattern C1 and the kinoform case D is carried out and computing, if operation result is 0, then the numerical value with the corresponding point among the pattern C1 places on the corresponding point of pattern A1 or B1 image, if operation result is 1, then the numerical value with the corresponding point among the pattern C1 places on the corresponding point of pattern B1 or A1 image;
The 4th step will be through the original background pattern A1 after the 3rd step handled as new background patterns A, original check pattern B1 after the 3rd step handled is as new check pattern B, new background patterns A is produced on coding card or the tag card, new check pattern B is produced on the see-through card, obtains decoding card or test card.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102735158A CN101770589B (en) | 2009-12-31 | 2009-12-31 | Method for carrying out image-text hiding according to encrypted and converted phase position |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024167A (en) * | 2010-12-15 | 2011-04-20 | 华中科技大学 | Dual-verification anti-counterfeiting method based on pattern hiding |
| CN102496333A (en) * | 2011-11-16 | 2012-06-13 | 江苏南大数码科技有限公司 | Methods for manufacturing of dynamic grid line detecting code mark and detecting plate |
| CN103179406A (en) * | 2013-04-12 | 2013-06-26 | 韩山师范学院 | Digital video watermark method using kinoform |
| CN104268613A (en) * | 2014-09-30 | 2015-01-07 | 上海宏盾防伪材料有限公司 | Image and text information hiding and reappearing structure and method based on color balance |
| CN106557799A (en) * | 2016-11-19 | 2017-04-05 | 哈尔滨理工大学 | Information coding structure based on circumferential arrangement striped array |
| CN108983433A (en) * | 2018-09-25 | 2018-12-11 | 上海宏盾防伪材料有限公司 | A kind of diffraction optics safety device with alternating binary coding hiding information |
| CN110335189A (en) * | 2019-05-31 | 2019-10-15 | 平安科技（深圳）有限公司 | Fill method, apparatus, computer equipment and the storage medium of anti-counterfeiting information |
| RU196408U1 (en) * | 2019-11-27 | 2020-02-28 | Общество С Ограниченной Ответственностью "Центр Компьютерной Голографии" | MICRO-OPTICAL SYSTEM FOR FORMING 2D IMAGES |
-
2009
- 2009-12-31 CN CN2009102735158A patent/CN101770589B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024167A (en) * | 2010-12-15 | 2011-04-20 | 华中科技大学 | Dual-verification anti-counterfeiting method based on pattern hiding |
| CN102496333A (en) * | 2011-11-16 | 2012-06-13 | 江苏南大数码科技有限公司 | Methods for manufacturing of dynamic grid line detecting code mark and detecting plate |
| CN103179406A (en) * | 2013-04-12 | 2013-06-26 | 韩山师范学院 | Digital video watermark method using kinoform |
| CN103179406B (en) * | 2013-04-12 | 2016-04-06 | 韩山师范学院 | A kind of digital video watermarking method applying kinoform |
| CN104268613A (en) * | 2014-09-30 | 2015-01-07 | 上海宏盾防伪材料有限公司 | Image and text information hiding and reappearing structure and method based on color balance |
| CN106557799A (en) * | 2016-11-19 | 2017-04-05 | 哈尔滨理工大学 | Information coding structure based on circumferential arrangement striped array |
| CN106557799B (en) * | 2016-11-19 | 2019-07-05 | 哈尔滨理工大学 | Information coding structure based on circumferential arrangement striped array |
| CN108983433A (en) * | 2018-09-25 | 2018-12-11 | 上海宏盾防伪材料有限公司 | A kind of diffraction optics safety device with alternating binary coding hiding information |
| CN110335189A (en) * | 2019-05-31 | 2019-10-15 | 平安科技（深圳）有限公司 | Fill method, apparatus, computer equipment and the storage medium of anti-counterfeiting information |
| CN110335189B (en) * | 2019-05-31 | 2024-01-16 | 平安科技（深圳）有限公司 | Method, device, computer equipment and storage medium for filling anti-counterfeiting information |
| RU196408U1 (en) * | 2019-11-27 | 2020-02-28 | Общество С Ограниченной Ответственностью "Центр Компьютерной Голографии" | MICRO-OPTICAL SYSTEM FOR FORMING 2D IMAGES |
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| CN101770589B (en) | 2012-07-04 |
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