CN100405422C - Double-card antifake sign and producing method thereof - Google Patents
Double-card antifake sign and producing method thereof Download PDFInfo
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- CN100405422C CN100405422C CNB2005101371156A CN200510137115A CN100405422C CN 100405422 C CN100405422 C CN 100405422C CN B2005101371156 A CNB2005101371156 A CN B2005101371156A CN 200510137115 A CN200510137115 A CN 200510137115A CN 100405422 C CN100405422 C CN 100405422C
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Abstract
The present invention discloses a double-card anti-counterfeiting mark. A detecting card is made of transparent materials, a mark card is provided with background images, and the detecting card is provided with detecting images. When the detecting images on the detecting card are overlapped with the background images on the mark card, a reproduced image is displayed. Three freely selected images are chosen, the images are sampled by using a random distribution method, and random distribution parameters are adjusted as required so that information is hidden in the background images and the detecting images and is difficult to observe with naked eyes. The present invention is designed by using a random distribution encryption method, partial information of the reproduced image is respectively hidden in the background images and the detecting images and is mutually supplemented, and the third image obtained during overlapping is also composed of random points and is completely different from the background images and the detecting images so that the difficulty of counterfeiting is increased and the anti-counterfeiting strength is improved.
Description
Technical field
The invention belongs to anti-counterfeiting technology, be specifically related to a kind of double-card antifake sign, anti-counterfeiting mark is provided with the encrypted image of stochastic distribution, can reproduce with test card (decoding card).
Background technology
Usually, double-card antifake sign mainly is to adopt the mole enciphered method.This encryption method is a foundation with the mole theory of classics, and existing pattern is carried out coding encrypting, is about to this pattern and modulates with one group of striped, makes it can not show the information of original setting; When another group striped when placed on it, just can be reproduced original pattern.This method is imitated easily because the modulation of striped is fairly simple, and anti-counterfeiting power is lower.The overlapping reproduction encrypted anti-false identifier of stochastic distribution is a kind of technology of researching and developing for the anti-counterfeiting power that increases anti-counterfeiting mark, is a kind of method for anti-counterfeit that hides Info on anti-counterfeiting mark, realizes encrypting by the information distribution between the Stochastic Modulation image.
Summary of the invention
The object of the present invention is to provide a kind of double-card antifake sign, this anti-counterfeiting mark is difficult for forging, and its anti-counterfeiting power is greatly improved; The present invention also provides the method for making of this double-card antifake sign.
A kind of double-card antifake sign provided by the invention, comprise tag card and test card, it is characterized in that: test card is made by transparent material, tag card is provided with background image, test card is provided with detected image, when the detected image on the test card and the background image on the tag card are overlapping, present reproduced image.
Make the method for above-mentioned double-card antifake sign, the steps include:
(1) selected arbitrarily three width of cloth images, as original background image A ', original detected image B ' and original reproduced image C ', wherein original background image A ' and original detected image B ' are measure-alike black and white original image, having among the original reproduced image C ' needs hiding black, and the size of this pattern is smaller or equal to the pattern dimension of original background image A ';
(2) select some picture elements as first group of picture element at random, in the figuratum zone of original background image A ', to there be the picture element of area of the pattern to carry out logic and operation among first group of picture element and the original background image A ', the picture element that overlaps with original pattern among the original background image A ' in first group of picture element is kept, the picture element that does not overlap removes, and is not re-used as the point in first group of picture element; Do not have the zone of pattern at original background image A ', the point in first group of picture element is as background noise put increase, the image A of the noise spot that obtains having powerful connections
1
(3) select some picture elements as second group of picture element more arbitrarily, and it is not overlapped with first group of picture element, in the figuratum zone of original detected image B ', to there be the picture element of area of the pattern to carry out logic and operation among second group of picture element and the original detected image B ', the picture element that overlaps with original pattern among the original detected image B ' in second group of picture element keeps, the picture element that does not overlap with original pattern among the original detected image B ' removes, and is not re-used as the point in second group of picture element; Do not have the zone of pattern at original detected image B ', the point in second group of picture element is as background noise put increase, the image B of the noise spot that obtains having powerful connections
1
(4) extract a part of picture element as the 3rd group of picture element from original reproduced image C ', and be embedded into image A
1In, obtain image A
2, the principle of extraction is to make the 3rd group of picture element be hidden in image A
1In, human eye can not identify original reproduced image C ';
(5) in the residue picture element of original reproduced image C ', select some picture elements to be embedded into B as the 4th group of picture element
1In, obtain image B
2, the principle of selection is to make the 4th group of picture element be hidden in image B
1In, human eye can not identify original reproduced image C ';
(6) according to image B
2With image A
2Reproduction effect after overlapping is adjusted the 3rd, the 4th group of point in the picture element, and is embedded into image A respectively
1And image B
1Adjust, up to image B
2With image A
2The resulting image in overlapping back is identical with the pattern of original reproduced image C ';
(7) image A that step (6) is obtained
2Be produced on Ji Kashang, obtain tag card, with image B
2Be produced on the see-through card, obtain test card.
The present invention adopts the encryption method of stochastic distribution to design, distinguish the partial information of reproduced image under cover in background image and the detected image, complement one another, the 3rd width of cloth image that obtains when overlapping also is made up of random point, and be different from background image and detected image fully, make that forging difficulty increases, and anti-counterfeiting power is improved.
Description of drawings
The image synoptic diagram that Fig. 1 makes on tag card for the present invention;
The image synoptic diagram of Fig. 2 for making on the test card corresponding with Fig. 1;
Fig. 3 is by Fig. 1 and the overlapping actual reproduction image synoptic diagram that obtains of Fig. 2.
Embodiment
The present invention includes tag card 1 and test card 2, test card 2 is made by transparent material, tag card 1 is provided with background image A, test card 2 is provided with detected image B, during identification, test card 2 is covered on the tag card 1, make detected image B and the background image A on the tag card 1 on the test card 2 overlapping, obtain the 3rd width of cloth image, i.e. reproduced image C.
The method for making of above-mentioned double-card antifake sign is:
(1) selected arbitrarily three width of cloth images, as original background image A ', original detected image B ' and original reproduced image C ', wherein original background image A ' and original detected image B ' are measure-alike black and white original image, having among the original reproduced image C ' needs hiding black, and the size of this pattern is smaller or equal to the pattern dimension of original background image A ';
(2) select some picture elements as first group of picture element at random, in the figuratum zone of original background image A ', to there be the picture element of area of the pattern to carry out logic and operation among first group of picture element and the original background image A ', the result is that the picture element that overlaps with original pattern among the A ' in first group of picture element keeps, the picture element that does not overlap with original pattern among the original background image A ' removes, and is not re-used as the point in first group of picture element.Do not have the zone of pattern at original background image A ', the point in first group of picture element is as background noise put to be increased, the image A of the noise spot that so just obtains having powerful connections
1
(3) select some picture elements as second group of picture element more arbitrarily, and it is not overlapped with first group of picture element.In the figuratum zone of original detected image B ', to there be the picture element of area of the pattern to carry out logic and operation among second group of picture element and the original detected image B ', the result is that the picture element that overlaps with original pattern among the original detected image B ' in second group of picture element keeps, the picture element that does not overlap with original pattern among the original detected image B ' removes, and is not re-used as the point in second group of picture element.Do not have the zone of pattern at original detected image B ', the point in second group of picture element is as background noise put to be increased.The image B of noise spot so just obtains having powerful connections
1
(4) extract a part of picture element as the 3rd group of picture element from original reproduced image C ', and be embedded into image A
1In, obtain image A
2, the principle of extraction is to make the 3rd group of picture element be hidden in image A
1In, human eye can not identify original reproduced image C '.
(5) in the residue picture element of original reproduced image C ', select some picture elements to be embedded into B as the 4th group of picture element
1In, obtain image B
2, the principle of selection is to make the 4th group of picture element be hidden in image B
1In, human eye can not identify original reproduced image C '.
(6) according to image B
2With image A
2Reproduction effect after overlapping is adjusted the 3rd, the 4th group of point in the picture element, and is embedded into image A respectively
1And image B
1Adjust, up to image B
2With image A
2The resulting image in overlapping back is identical with the pattern of original reproduced image C ', the image A of this moment
2Be background images A, image B
2Be detected image B, image B
2With image A
2Overlapping resulting image is reproduced image C.Reproduced image C is identical with the pattern of original reproduced image C ', but the pixel of reproduced image C is counted to count than the pixel of original reproduced image C ' and lacked.
(7) the background image A that step (6) is obtained is produced on Ji Kashang, obtains tag card 1, and detected image B is produced on the see-through card, obtains test card 2.
Tag card shown in Figure 1 is manufactured with background image A on it, shown in Figure 2 is transparent test card, is manufactured with detected image B on it.During detection, detected image B and background image A are overlaped, present actual reproduced image C behind the aligning, i.e. Fig. 3.Because renders image information is hidden in respectively in the image of tag card and test card, the adulterator is difficult to counterfeit.
The present invention adopts the method for stochastic distribution that image is sampled, and the parameter of stochastic distribution can be adjusted as required, makes hiding information with the naked eye be difficult for observing.
Claims (2)
1. a double-card antifake sign comprises tag card and test card, and it is characterized in that: test card is made by transparent material, tag card is provided with background image, test card is provided with detected image, when the detected image on the test card and the background image on the tag card are overlapping, presents reproduced image.
2. the method for making of a double-card antifake sign the steps include:
(1) selected arbitrarily three width of cloth images, as original background image A ', original detected image B ' and original reproduced image C ', wherein original background image A ' and original detected image B ' are measure-alike black and white original image, having among the original reproduced image C ' needs hiding black, and the size of this pattern is smaller or equal to the pattern dimension of original background image A ';
(2) select some picture elements as first group of picture element at random, in the figuratum zone of original background image A ', to there be the picture element of area of the pattern to carry out logic and operation among first group of picture element and the original background image A ', the picture element that overlaps with original pattern among the original background image A ' in first group of picture element is kept, the picture element that does not overlap removes, and is not re-used as the point in first group of picture element; Do not have the zone of pattern at original background image A ', the point in first group of picture element is as background noise put increase, the image A of the noise spot that obtains having powerful connections
1
(3) select some picture elements as second group of picture element more arbitrarily, and it is not overlapped with first group of picture element, in the figuratum zone of original detected image B ', to there be the picture element of area of the pattern to carry out logic and operation among second group of picture element and the original detected image B ', the picture element that overlaps with original pattern among the original detected image B ' in second group of picture element keeps, the picture element that does not overlap with original pattern among the original detected image B ' removes, and is not re-used as the point in second group of picture element; Do not have the zone of pattern at original detected image B ', the point in second group of picture element is as background noise put increase, the image B of the noise spot that obtains having powerful connections
1
(4) extract a part of picture element as the 3rd group of picture element from original reproduced image C ', and be embedded into image A
1In, obtain image A
2, the principle of extraction is to make the 3rd group of picture element be hidden in visual A
1In, human eye can not identify original reproduced image C ';
(5) in the residue picture element of original reproduced image C ', select some picture elements to be embedded into B as the 4th group of picture element
1In, obtain image B
2, the principle of selection is to make the 4th group of picture element be hidden in image B
1In, human eye can not identify original reproduced image C ';
(6) according to image B
2With image A
2Reproduction effect after overlapping is adjusted the 3rd, the 4th group of point in the picture element, and is embedded into image A respectively
1And image B
1Adjust, up to image B
2With image A
2The resulting image in overlapping back is identical with the pattern of original reproduced image C ';
(7) image A that step (6) is obtained
2Be produced on Ji Kashang, obtain tag card, with image B
2Be produced on the see-through card, obtain test card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101371156A CN100405422C (en) | 2005-12-31 | 2005-12-31 | Double-card antifake sign and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101371156A CN100405422C (en) | 2005-12-31 | 2005-12-31 | Double-card antifake sign and producing method thereof |
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|---|---|
| CN1811860A CN1811860A (en) | 2006-08-02 |
| CN100405422C true CN100405422C (en) | 2008-07-23 |
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| CNB2005101371156A Active CN100405422C (en) | 2005-12-31 | 2005-12-31 | Double-card antifake sign and producing method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108769A (en) * | 1994-08-15 | 1995-09-20 | 孟武 | Double clamping-diameter mark laser holographic anti-false tag and its checking device |
| CN2335217Y (en) * | 1998-09-23 | 1999-08-25 | 黄义春 | Anti-counterfei device |
| US6674875B1 (en) * | 1997-09-30 | 2004-01-06 | Durand Limited | Anti-counterfeiting and diffusive screens |
| WO2004013725A2 (en) * | 2002-08-01 | 2004-02-12 | Oracle International Corporation | Asynchronous information sharing system |
| CN1542672A (en) * | 2003-04-30 | 2004-11-03 | 四川大学 | Articles false proof multi-image hiding and fabricating method |
| CN1632819A (en) * | 2004-12-24 | 2005-06-29 | 靳燕霆 | Identification and false proof method using two-dimension code |
-
2005
- 2005-12-31 CN CNB2005101371156A patent/CN100405422C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108769A (en) * | 1994-08-15 | 1995-09-20 | 孟武 | Double clamping-diameter mark laser holographic anti-false tag and its checking device |
| US6674875B1 (en) * | 1997-09-30 | 2004-01-06 | Durand Limited | Anti-counterfeiting and diffusive screens |
| CN2335217Y (en) * | 1998-09-23 | 1999-08-25 | 黄义春 | Anti-counterfei device |
| WO2004013725A2 (en) * | 2002-08-01 | 2004-02-12 | Oracle International Corporation | Asynchronous information sharing system |
| CN1542672A (en) * | 2003-04-30 | 2004-11-03 | 四川大学 | Articles false proof multi-image hiding and fabricating method |
| CN1632819A (en) * | 2004-12-24 | 2005-06-29 | 靳燕霆 | Identification and false proof method using two-dimension code |
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| Publication number | Publication date |
|---|---|
| CN1811860A (en) | 2006-08-02 |
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