CN109993254A - White tone invisible invalid code complementary identification two-dimensional code anti-counterfeiting method - Google Patents

Abstract

An anti-counterfeiting method for complementary identification of white-tone invisible invalid codes. In the anti-counterfeiting printing method, a two-dimensional code image is first formed from anti-counterfeiting information, and the two-dimensional code image is divided into two parts, one part is called a missing code image , and the other part is called the complement image, and then use the metamerism color matching ink to print the missing code image on the blank area of the print, and print the complement image on a thin key sheet to generate an invisible complementary two-dimensional code image, The invisible complementary two-dimensional code image shows a blank image under visible light. Only when the complementary code image and the missing code image are combined under infrared light to form a complete two-dimensional code image, the correct two-dimensional code can be obtained by scanning. This method can be used to identify whether there is a problem of counterfeiting and infringement in printed materials such as labels, bills, and securities.

Description

White tone invisible invalid code complementary identification two-dimensional code anti-counterfeiting method

Technical field:

The invention relates to an anti-counterfeiting printing technology, in particular to a two-dimensional code anti-counterfeiting method for complementary identification of white tone invisible invalid codes, which can be used for anti-counterfeiting of various printed products.

Background technique:

At present, the more common anti-counterfeiting methods are as follows: The first is laser anti-counterfeiting signs, which use laser invisible ink fluorescent ink printing technology to print product logos or special identification patterns into product anti-counterfeiting labels, and the same Similar products use the same label, because anti-counterfeiting labels are easier to forge, and forged anti-counterfeiting labels are used on counterfeit products, resulting in confusion between true and false products, so it is difficult to effectively prevent counterfeiting. The second is the password anti-counterfeiting label. The method used is to compile a set of numbers for each product, and the codes of each product are different. This number is printed on the label and covered, and the number is stored at the same time. Enter into the computer database that can be inquired by consumers. When consumers buy products, they will input the numbers on the logo into the computer database for comparison and identification through telephone or network access computer. The same is true, and the difference is false. Simple, easy to identify, and not easy to forge, but in actual use, because the encoded data is uniformly generated by the computer and printed on the label. The code data representing the authenticity of the product may be illegally copied and counterfeited. At the same time, the code can also be recovered from the code label on the unchecked product and pasted on the fake product, and the anti-counterfeiting effect is difficult to guarantee. The third type is texture anti-counterfeiting, which uses the texture features on the label to prevent counterfeiting. Although it is difficult to forge, but because only the serial number of the label is set, and it is a clear code, each label can be queried repeatedly, and counterfeiters can pass the warehouse keeper. Or the salesperson will copy the serial number on the label and the necessary texture features reflected in the query, that is, whether there is any phenomenon in the square, and then forge them in batches according to this feature. The fourth is the anti-counterfeiting of metameric ink. The anti-counterfeiting of metameric ink is an anti-counterfeiting printing technology based on the phenomenon of metamerism, that is, using two substances to present the same color under one light source, but under another light source, it is The phenomenon of showing different colors realizes anti-counterfeiting, but the ratio of metamerism is easier to measure, so the anti-counterfeiting effect is also difficult to guarantee.

To sum up, the existing anti-counterfeiting methods all have certain shortcomings, and thus cannot fundamentally prevent counterfeit products.

Invention content:

In order to overcome the shortcomings of the existing anti-counterfeiting printing technologies for various printed products, the present invention improves the existing technology in view of the shortcomings of the existing anti-counterfeiting printing technologies for printed products, and proposes a white tone invisible invalid code complementary identification two-dimensional Code anti-counterfeiting method, the anti-counterfeiting method firstly constitutes a two-dimensional code image from anti-counterfeiting information, and divides the two-dimensional code image into two parts, one part is called the missing code image, and the other part is called the complementary code image. The size, size and shape information of the code image and the complement image are hidden, and the blank area after the complement image is divided from the two-dimensional code image is filled with the invalid code image, so that the missing code image and the invalid code image form a The original QR code image has the same shape and area as the pseudo QR code image, and then the pseudo QR code image is printed on the blank area of the printed matter using metamerism color matching ink, and the complementary code image is printed on a white backing sheet key On-chip, an invisible QR code image with a complementary white tone of invalid code is generated. The invisible QR code image shows a blank image under visible light, and only under infrared light, the complement image and the missing code image on the pseudo QR code image are combined. When a complete two-dimensional code image is formed together, the correct two-dimensional code information can be obtained by scanning, and this method can be used to identify whether there is a problem of counterfeiting and infringement of labels, bills, securities and other printed materials.

The technical scheme adopted by the present invention to solve the technical problem is as follows: adjusting the color matching ratio of the four-color ink of cyan, yellow and black to generate a metamerism color matching ink, the color matching ink appears white under visible light and black under infrared light, A two-dimensional code image is formed by the two-dimensional code information, and the two-dimensional code image is divided into two parts, one part is called the missing code image, and the other part is called the complementary code image. The missing code image and the complementary code image can be complementary. A complete two-dimensional code image is formed, and the blank area after the complement image is divided from the two-dimensional code image is filled with the invalid code image, so that the missing code image and the invalid code image form a same size as the original two-dimensional code image. , pseudo two-dimensional code image with the same shape and area, the color blocks in the color block diagram of the pseudo two-dimensional code image and the complement image are divided into two types, one is a black color block, the other is a white color block,

In order to hide the QR code image on the printed matter, print the pseudo QR code image in the blank area of the printed matter, and print the complementary code image on a white backed sheet key blade. For the pseudo QR code image and the complementary code The white color block in the color block diagram of the image is required to appear white under both visible light and infrared light, because the blank area of the print and the white substrate of the thin key blade appear white under both visible light and infrared light, so the pseudo-two The white color blocks in the color block diagram of the dimensional code image and the complementary code image are printed with ordinary white ink. For the black color blocks in the color block diagram of the pseudo two-dimensional code image and the complementary code image, it is required to appear white in visible light, and in infrared It appears black under light, so it is printed with metamerism color matching ink, so that the pseudo two-dimensional code image printed on the blank area of the printed matter and the complementary code image printed on the white substrate of the thin key blade appear white under visible light, Pseudo QR code images and complementary code images can only be displayed under infrared light.

The pseudo QR code image printed on the commodity is not a complete QR code image, and the correct QR code information cannot be obtained by scanning. Only a complete QR code image can be obtained by scanning to obtain the correct QR code information. When authenticating, place the complementary code image on the thin-plate key blade on the pseudo-QR code image under infrared light, and use the thin-plate key blade on the The complementary code image replaces the invalid code image on the pseudo QR code image and forms a complete QR code image together with the missing code image. The correct QR code information is obtained by scanning, and the missing code image and the missing code image are passed under infrared light. Complementary image complementary recognition can effectively prevent counterfeiting and infringement of labels, bills, securities, etc.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Figure 1 QR code image.

Figure 2 Missing code image.

Figure 3 Complement image.

Figure 4 Pseudo QR code image.

Figure 5 Key image of missing code image.

Figure 6. Partial view of pseudo-QR code image and complement image.

Detailed ways

Adjust the color matching ratio of cyan, yellow and black four-color ink to generate a metamerism color matching ink, which appears white under visible light and black under infrared light.

In Figure 1, Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6, a two-dimensional code image 1 is composed of anti-counterfeiting information, and the two-dimensional code image 1 is divided into two parts, one part is called a missing code image 2. The other part is called the complement image 3. The complement image 2 and the complement image 3 complement each other to form a complete two-dimensional code image 1. After the complement image 3 is segmented from the two-dimensional code image 1, the blank The invalid code image 5 is filled on the area 4, so that the missing code image 2 and the invalid code image 5 form a pseudo two-dimensional code image 6 with the same shape and area as the original two-dimensional code image 1. The pseudo two-dimensional code image 6 and the complement code The color blocks in the color block diagram of image 3 are divided into two types, one is black color block 9, the other is white color block 8,

In order to hide the two-dimensional code image 1 on the printed matter, the pseudo two-dimensional code image 6 is printed in the blank area of the printed matter, and the complementary code image 3 is printed on a white substrate sheet key blade 7. For the pseudo two-dimensional code image The white color patch 8 in the color patch diagram of the code image 6 and the complement image 3 is required to appear white under both visible light and infrared light, because the blank area of the print and the white substrate of the thin key blade 7 are under visible light and infrared light. It appears white under the light, so the white color block 8 in the color block diagram of the pseudo two-dimensional code image 6 and the complement image 3 is printed with ordinary white ink. For the color block diagram of the pseudo two-dimensional code image 6 and the complement image 3 The black color block 9 in the middle is required to appear white under visible light and black under infrared light, so it is printed with metamerism color matching ink, so that the pseudo two-dimensional code image 6 printed on the blank area of the printed matter and printed on the The complementary code image 3 on the white substrate of the thin plate key blade 7 appears white under visible light, and the pseudo two-dimensional code image 6 and the complementary code image 3 can only appear under infrared light.

During authenticity identification, place the complementary code image 3 on the thin key blade 7 on the pseudo two-dimensional code image 6 under infrared light, and use the complementary code image 3 on the thin key blade 7 to replace the invalid code image 5 and combine with the missing code image 5. The code image 2 together constitute a complete two-dimensional code image 1. The correct two-dimensional code information is obtained by scanning, and the complementary identification of the missing code image 2 and the complementary code image 3 under infrared light can effectively prevent labels, bills, and valuables. Counterfeiting and infringement of securities, etc.

Claims (5)

1. A two-dimensional code anti-counterfeiting method for complementary identification of white tone invisible invalid codes, it is characterized in that: this anti-counterfeiting printing method first constitutes a two-dimensional code image by anti-counterfeiting information, and this two-dimensional code image is divided into two parts, One part is called the missing code image, and the other part is called the complementary code image. The missing code image and the complementary code image complement each other to form a complete two-dimensional code image. Hide it, and fill the blank area where the complementary code image is separated from the QR code image, so that the missing code image and the invalid code image form a pseudo 2D image with the same shape and area as the original QR code image. code image, and then use the metamerism color matching ink to print the pseudo two-dimensional code image on the blank area of the printed matter, and print the complementary code image on a white substrate sheet key blade to generate an invalid code complementary white tone invisible two. One-dimensional code image, the invisible two-dimensional code image shows a blank image under visible light. Only when the complementary code image and the missing code image are combined together to form a complete two-dimensional code image under infrared light, can the correct image be obtained by scanning. QR code information. 2. the two-dimensional code anti-counterfeiting method of white tone invisible invalid code complementary key identification according to claim 1, is characterized in that: adjust the color matching ratio of cyan, yellow and black four-color ink, generate a kind of metamerism color matching ink, the Metameric color matching inks appear white under visible light and black under infrared light. 3. the two-dimensional code anti-counterfeiting method of white tone invisible invalid code complementary key identification according to claim 1, is characterized in that: utilize metamerism color matching ink to print the pseudo two-dimensional code image in the blank area of the printed matter, and The complementary code image is printed on a thin plate key blade with a white substrate, so that the pseudo two-dimensional code image printed on the blank area of the printed matter and the complementary code image printed on the white substrate of the thin plate key blade appear white under visible light and appear white under visible light. Pseudo QR code images and complementary code images can only be displayed under infrared light. 4. The two-dimensional code anti-counterfeiting method of white tone invisible invalid code complementary key identification according to claim 1, is characterized in that: the pseudo two-dimensional code image printed on the commodity is not a complete two-dimensional code image, cannot Obtain correct two-dimensional code information by scanning. When authenticating, place the complementary code image on the thin key blade on the pseudo two-dimensional code image under infrared light, and use the complementary image on the thin key blade to replace the pseudo two-dimensional code image. The invalid code image and the missing code image form a complete two-dimensional code image, and the correct two-dimensional code information can be obtained by scanning, and the complementary identification of the missing code image and the complementary code image under infrared light can effectively prevent labels, Counterfeiting and infringement of bills, securities, etc. 5. The two-dimensional code anti-counterfeiting method for the identification of a white tone invisible invalid code complementary key according to claim 1, wherein the thin plate refers to a cardboard, a plastic plate, an aluminum plate, an iron plate, a copper plate, a stainless steel plate, and the like.