CN102024167A - Dual-verification anti-counterfeiting method based on pattern hiding - Google Patents

Abstract

The invention discloses an anti-counterfeiting method for double verification of pattern hiding. In the method, the pattern to be hidden is transformed into a plane optical element, and then two other patterns are selected, and the selected other two patterns are filled with stripes of the plane optical element. As the identification card pattern and the detection card pattern respectively; then the identification card pattern is made on the anti-counterfeiting mark to become the identification card; the detection card pattern is made on the transparent material to obtain the detection card; during detection, when the detection card overlaps with the identification card , to reveal the pattern to be hidden, as the first verification of authenticity; when the identification card pattern on the identification card is irradiated with laser light, the pattern to be hidden is also reproduced, as the second verification. The method adopts double verification and information encryption methods, and has strong anti-counterfeiting strength.

Description

A double verification anti-counterfeiting method based on pattern hiding

technical field

The invention belongs to the technical field of information hiding and anti-counterfeiting, and is a double-authentication anti-counterfeiting method based on pattern hiding.

Background technique

At present, most of the verification methods in the field of anti-counterfeiting use a single verification method. For example, the anti-counterfeiting method of Moiré stripes is based on the classic Moore theory, which encodes and encrypts the existing pattern, that is, the pattern is modulated with a group of stripes so that it cannot display the information originally set; when another group of stripes is set When placed on it, the original pattern can be reproduced. This method is easy to imitate because the modulation of the stripes is relatively simple, and the anti-counterfeiting strength is low.

Contents of the invention

The object of the present invention is an anti-counterfeiting method with pattern hidden double verification, which can overcome the shortcomings of the single verification method and can greatly enhance the anti-counterfeiting strength of the anti-counterfeiting mark.

The present invention provides an anti-counterfeiting method for double verification of pattern hiding, which is characterized in that the pattern to be hidden is transformed into a plane optical element, and then the other two patterns are selected, and the selected other two patterns are used as stripes of the plane optical element Filling, respectively as the identification card pattern and the detection card pattern; then make the identification card pattern on the anti-counterfeiting mark to become the identification card; make the detection card pattern on the transparent material to obtain the detection card; during detection, when the detection card and the identification card When overlapping, the pattern to be hidden will be revealed as the first verification of authenticity; when the identification card pattern on the identification card is irradiated with laser light, the pattern to be hidden will also be reproduced as the second verification.

The present invention proposes a double authentication and encryption anti-counterfeiting method, adopting the double authentication and information encryption method can overcome the problems of this method, and its characteristics are as follows:

(1) In the case that a single verification may be forged, the second layer of anti-counterfeiting verification information can re-verify the first layer of encrypted information. Since the second layer of anti-counterfeiting verification information can re-verify the first layer of encrypted information, and the second layer of verification is concealed, the anti-counterfeiting strength of the anti-counterfeiting mark is greatly enhanced.

(2) Since the pattern to be hidden has become a plane optical element that cannot be directly recognized by human eyes during encryption transformation, the purpose of hiding information is achieved. And because the information of dual-card verification and laser reproduction verification cannot be seen on the surface, it is difficult for counterfeiters to counterfeit.

(3) The pattern to be hidden can be any graphic or text, such as the copyright owner's icon and its text. The anti-counterfeiting mark made by this method can also detect the plane optical elements by using the machine recognition method to realize intelligent recognition and improve the anti-counterfeiting strength.

Description of drawings

Fig. 1 is any pattern to be hidden, and the letter A is taken as an example here.

Figure 2 is a "planar optical element" transformed from Figure 1 .

In Fig. 3, (a) is the "identification card pattern" on the identification card, which contains part of the content of the hidden pattern; (b) is the "detection card pattern" on the detection card, which contains another part of the hidden pattern; (c) It is a schematic diagram of the hidden pattern information (letter A) that appears when the identification card (a) and the detection card (b) are overlapped.

(a), (b) and (c) in Figure 4 are the identification card pattern, the detection card pattern, and the "anti-counterfeiting watermark" that appear when the two overlap schematic diagram.

Fig. 5 is a schematic diagram of hidden information reappearance of the identification card in the case of reflection when the laser is irradiated;

Fig. 6 is a schematic diagram of information reproduction of the identification card in the case of transmission when irradiated by laser light.

Detailed ways

The double authentication and encryption method that the present invention will provide, first adopts the diffraction grating encryption technology to transform the "pattern to be hidden" into a "plane optical element". Identify the information content hidden within.

Then, the first verification - dual card verification:

Make identification cards and detection cards for double-card encrypted anti-counterfeiting verification marks. On the identification card and the detection card are two other patterns different from the "pattern to be hidden", which are called "identification card pattern" and "detection card pattern". "Plane Optical Elements" of "pattern" information.

When the detection card is overlapped with the identification card, the information of "pattern to be hidden" can be presented. This is the first simple verification method. The detection card is made of transparent material, which is more complicated than the moiré fringe production method, with stronger randomness and greater difficulty in production. The test card and identification card are produced by the following step (3).

The second verification - laser reproduction verification:

Make the "logo card pattern" onto the laser holographic logo. Since the identification card pattern is composed of "planar optical elements" containing the information of the "pattern to be hidden", the information of the "pattern to be hidden" can be reproduced under laser irradiation, and the information is the same as the first verification , only when the pattern information displayed by the dual-card verification is consistent with the pattern information reproduced by the laser, it is determined to be true. This is the second level of verification. The "identification card pattern" pattern made on the identification card is highly concealed. Even though the information of the first level of verification may be counterfeited, the process of the second level of verification cannot be known, so the anti-counterfeiting strength can be improved.

It can be made on holographic anti-counterfeiting labels or other film labels.

The steps of the inventive method are described in detail below:

(1) Randomly select a pattern, such as the letter A as the pattern to be hidden (Figure 1);

(2) Transform the pattern to be hidden into a planar optical element (Figure 2);

(3) Production of identification cards and test cards

(3.1) Choose another two patterns B and C, and fill B and C with the stripes of the planar optical elements shown in Figure 2 to obtain B' and C', and use B' as the identification card pattern (Figure 3(a) ), using C' as the detection card pattern (Fig. 3(b)).

(3.2) According to the making method of double-card encryption anti-counterfeit verification mark, mark card pattern B ' is made on the anti-counterfeit mark, becomes mark card; Test card pattern C ' is made on transparent material, obtains test card.

(4) Overlap the detection card with the identification card to reveal the hidden letter A, which is the first verification of authenticity. Figure 3(c).

(5) By irradiating the identification card pattern B’ on the identification card with laser light, the hidden letter A can also be reproduced, as shown in Figure 5. In Fig. 5, 1 represents the "identification card pattern" on the identification card 2, and the identification card pattern is irradiated with a laser pointer 3, and a piece of white paper 4 is placed on the optical path of the reflected light, and the image of the letter A appears on the white paper .

Whether the laser reproduction verification in step (5) is consistent with the double card verification in step (4) is the second verification of authenticity identification.

The identification card can also be made into a transparent form. At this time, the laser reproduction verification is a transmissive verification, as shown in Figure 6. In Fig. 6, 5 represents a transparent identification card.

In the present invention, the stripes of the "plane optical elements" obtained by encrypting and transforming the patterns to be hidden are made into the form of double card anti-counterfeiting verification as the first verification function; " Composition, the hidden information can be reproduced by laser, and the pattern that overlaps with the double card is the same pattern, realizing double verification.

The present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can adopt various other specific embodiments to implement the present invention according to the disclosed content of the present invention. Changes or modified designs all fall within the protection scope of the present invention.

Claims (1)

1. a pattern is hidden the method for anti-counterfeit of double verification, it is characterized in that, pattern to be hidden is transformed into the plane optical elements, select other two width of cloth patterns again, selected other two width of cloth patterns are filled with the striped of described plane optical elements, respectively as tag card pattern and test card pattern; Then with the tag card design producing to anti-counterfeiting mark, become tag card; The test card design producing to transparent material, is obtained test card; During detection, when test card and tag card are overlapping, manifest pattern to be hidden, as true and false first re-examination card of distinguishing; When the tag card pattern that adopts on the laser radiation tag card, also reproduce pattern to be hidden, demonstrate,prove as second re-examination.

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