CN110009081A - Multi-code segmentation fragment complementary invisible identification document 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

Multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method

Technical field:

The invention relates to a document anti-counterfeiting method, in particular to a multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method, which can be used for the anti-counterfeiting of various documents.

Background technique:

Certificates are certificates and documents used to prove identity, experience, etc., such as resident ID cards, passports, work permits, student ID cards, graduation certificates, etc. The fraud of various forms of documents has brought serious threats to the society and the people. Document anti-counterfeiting technologies mainly include digital encryption, digital watermarking, laser anti-counterfeiting signs, password anti-counterfeiting labels, texture anti-counterfeiting, biometric identification technology, etc. With the development of science and technology, the means of document forgery are also constantly improving. It can no longer meet the needs of document anti-counterfeiting. It is necessary to continuously improve document anti-counterfeiting technology to protect the legitimate interests of society and the people, and maintain social stability and security.

Invention content:

In order to improve the reliability and security of document anti-counterfeiting, the present invention improves the existing document anti-counterfeiting technology in view of the shortcomings of the existing document anti-counterfeiting, and proposes a multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method. The anti-counterfeiting method consists of Three QR code images of the same size, size and shape are generated from personal information, licensing authority information and manufacturer information, and each QR code image is divided into two or more flat graphic images complementary to each other, and some of the images are called The missing code image, another part of the image is called the complementary code image, the missing code image and the complementary code image can be complementary to form the original two-dimensional code image, and the missing code image of the three two-dimensional code images can be complementary to form one with the two-dimensional code. A pseudo two-dimensional code image with the same size, size and shape of the image, the pseudo two-dimensional code image is printed on a blank area of the document with the same size and shape as the two-dimensional code image by using metamerism color matching ink to generate a pseudo two-dimensional code image. The pseudo two-dimensional code image hidden on the blank area of the document, the blank image appears in the blank area under visible light, and the pseudo two-dimensional code image printed on the blank area appears under infrared light. The code image can generate three two-dimensional code images respectively, and the information of each two-dimensional code image can be obtained by scanning. Using this method, the pseudo two-dimensional code image can be hidden in any blank area on the certificate. This method can identify Whether the certificate is counterfeit and infringing.

The technical solution adopted by the present invention to solve the technical problem is as follows: a first two-dimensional code image is formed from personal information, the first two-dimensional code image is complementarily divided into a first missing code image and a first complementary code image, A missing code image and a first complement image can be complementary to form a complete first two-dimensional code image,

The second two-dimensional code image is composed of the information of the issuing authority, and the second two-dimensional code image is complementary divided into a second missing code image and a second complementary image. The second missing code image and the second complementary image can be Complementary forms a complete second QR code image,

The third two-dimensional code image is composed of the manufacturer's information, and the third two-dimensional code image is complementary and divided into a third missing code image and a third complementary image, and the third missing code image and the third complementary image can be complementary. constitutes a complete third QR code image,

The first missing code image, the second missing code image and the third missing code image are complementary to form a pseudo two-dimensional code image with the same size, size and shape as the two-dimensional code image,

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

There are two types of dots in the pseudo-QR code image, one is black dots, the other is white dots.

In order to hide the pseudo two-dimensional code image on the document, print the pseudo two-dimensional code image on a blank area on the document with the same size and shape as the pseudo two-dimensional code image. For the white dots in the pseudo two-dimensional code image, It is required to appear white under both visible light and infrared light, so ordinary white ink is used for printing. For the black dots in the pseudo two-dimensional code image, it is required to appear white under visible light and black under infrared light, so color matching ink is used to print, In this way, the pseudo two-dimensional code image printed in the blank area of the document is the same color as the blank area on the document under visible light, and the pseudo two-dimensional code image printed on this area is displayed under infrared light, using three two-dimensional code images. The complementary code image can generate three two-dimensional code images respectively, and the information of each two-dimensional code image can be obtained by scanning. Using this method, the pseudo two-dimensional code image can be hidden in any area on the certificate. This method can Identify whether there is a problem of counterfeiting or infringement in the certificate.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings.

Figure 1 The first QR code image.

Figure 2 The first missing code image.

Figure 3 First's complement image.

Figure 4 The second QR code image.

Figure 5 The second missing code image.

Figure 6 Second's complement image.

Figure 7 The third QR code image.

Figure 8 The third missing code image.

Figure 9 Third's complement image.

Figure 10 Pseudo QR code image.

Figure 11. Partial color block diagram of pseudo two-dimensional code image.

Detailed ways

In Figure 1, Figure 2 and Figure 3, the first two-dimensional code image 1 is composed of personal information, and the first two-dimensional code image 1 is complementarily divided into a first missing code image 1-1 and a first complement code Image 1-2, the first missing code image 1-1 and the first complement image 1-2 can be complementary to form a complete first two-dimensional code image 1,

In Fig. 4, Fig. 5 and Fig. 6, the second two-dimensional code image 2 is formed by the information of the issuing authority, and the second two-dimensional code image 2 is complementarily divided into the second code-missing image 2-1 and the second two-dimensional code image 2-1. The complementary code image 2-2, the second missing code image 2-1 and the second complementary code image 2-2 can be complementary to form a complete second two-dimensional code image 2,

In Fig. 7, Fig. 8 and Fig. 9, the third two-dimensional code image 3 is formed by the manufacturer's information, and the third two-dimensional code image 3 is complementarily divided into a third missing code image 3-1 and a third complementary image 3-1. The code image 3-2, the third missing code image 3-1 and the third complement image 3-2 can be complementary to form a complete third two-dimensional code image 3,

The three QR code images are the same size, size and shape,

In FIG. 10 , the first missing code image 1-1, the second missing code image 2-1 and the third missing code image 3-1 complement each other to form a pseudo code with the same size, size and shape as the two-dimensional code image. QR code image 3-3,

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

In Fig. 10 and Fig. 11, there are two types of dots in the pseudo two-dimensional code image, one is the black dot 7 and the other is the white dot 6. In order to hide the pseudo two-dimensional code image 3-3 on the document, Print the pseudo two-dimensional code image 3-3 on a blank area on the document that is the same size and shape as the pseudo two-dimensional code image 3-3. For the white dot 6 in the pseudo two-dimensional code image 3-3 dots, it is required It appears white under both visible light and infrared light, and is printed with ordinary white ink. For the black dot 7 in the dots 3-3 of the pseudo two-dimensional code image, it is required to appear white under visible light and black under infrared light, so color matching is used. Ink printing, so that the pseudo two-dimensional code image 3-3 printed in the blank area of the document is the same color as the blank area of the document under visible light, and the pseudo two-dimensional code image 3-3 printed on this area is displayed under infrared light , three two-dimensional code images can be generated by using the complementary code images of the three two-dimensional code images, and the information of each two-dimensional code image can be obtained by scanning. In any area, this method can identify whether there is a problem of counterfeiting and infringement of documents.

Claims (5)

1. A multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method is characterized in that: this anti-counterfeiting method generates three two-dimensional code images with the same size, size and shape from personal information, certificate issuing authority information and manufacturer information, and Each QR code image is complementarily divided into two or more plane graphic images, one part of the image is called the missing code image, and the other part of the image is called the complementary image. The missing code image and the complementary image can be complementary to form the original two-dimensional image. A code image, using the complementarity of the missing code images of the three QR code images to form a pseudo QR code image with the same size, size and shape as the QR code image. One is black dots, and the other is white dots. The pseudo-QR code image is printed on a blank area of the document with the same size and shape as the QR code image by using metamerism color matching ink to generate a The pseudo-QR code image hidden on the blank area of the document, on the blank area of the document, the blank image is displayed under visible light, and the pseudo-QR code image printed on the area is displayed under infrared light, using three two-dimensional codes The complement image of the image can generate three two-dimensional code images respectively, and the information of each two-dimensional code image can be obtained by scanning. Using this method, the pseudo two-dimensional code image can be hidden in any blank area on the certificate. The method can identify whether the certificate has the problem of counterfeiting and infringement. 2. The multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method according to claim 1, characterized in that: the metamerism color matching ink is prepared by adjusting the color matching ratio of the four-color ink of cyan, yellow and black, and the color matching ink is in the It appears white under visible light and black under infrared light. 3. The multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method according to claim 1, characterized in that: each two-dimensional code image is complementarily divided into two or more plane graphic images, and a part of the images is called missing code The other part of the image is called the complementary code image, and the missing code image and the complementary code image of each two-dimensional code image can be complementary to form the original two-dimensional code image. 4. The multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method according to claim 1, wherein the pseudo two-dimensional code image is printed on a blank area on the document with the same size and shape as the pseudo two-dimensional code image, The white dots in the pseudo two-dimensional code image are printed with ordinary white ink, and the black dots in the pseudo two-dimensional code image are printed with color matching ink. 5. The multi-code segmentation fragment complementary invisible identification document anti-counterfeiting method according to claim 1, characterized in that: the pseudo two-dimensional code image printed in the blank area of the document is the same color as the blank area of the document under visible light, and is in infrared The pseudo two-dimensional code image on the area is displayed under the light, and three two-dimensional code images can be generated respectively by using the complementary code images of the three two-dimensional code images, and the information of each two-dimensional code image can be obtained by scanning, using this method The pseudo QR code image can be invisible on any blank area on the document.