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2D linear graphics coding anti-fake method

A technology of linear graphics and linear graphics, which is applied in the anti-counterfeiting field of two-dimensional linear graphic coding, can solve the problems of anti-counterfeiting failure, inability to read out information, and increase the difficulty for consumers to read numbers, etc., and achieve good anti-counterfeiting performance and wide application range Effect

Active Publication Date: 2008-01-16
李曙光 +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product numbers or graphic codes provided by this anti-counterfeiting system cannot meet the needs of various types and different sizes of products. For example, in order to prevent counterfeiters from counterfeiting in batches, digital coding systems generally provide 18-bit or even longer codes. This code not only It increases the difficulty for consumers to read numbers, and it is difficult to print such a long code directly on some small-sized products, such as screws, small bearings, etc.; graphic codes also have the above problems
In addition, as long as this kind of digital anti-counterfeiting mark is slightly damaged, the original information cannot be read out, resulting in anti-counterfeiting failure.

Method used

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  • 2D linear graphics coding anti-fake method

Examples

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Effect test

Embodiment 1

[0037] Definition: the letter a represents the rectangular reference frame, b represents the square reference frame; the letter d represents the angle, and the Arabic numerals represent the angle value between the straight line and the reference line. Each code is composed of the letter d plus a number.

[0038] For the generation of two-dimensional linear graph codes, see Figure 1 and Figure 2:

[0039] Step 1: First, determine the number of codes (each code corresponds to a straight line), usually the range can be from 8 to 20 bits, and this example uses 3-digit codes to illustrate. According to the above definition, the computer randomly generates a set of codes, such as: ad60d50d120, and its three codes are d60, d50, and d120 respectively.

[0040] Step 2: Generate a reference frame according to the code. The first letter of the code ad60d50d120 is a, so the generated reference frame is a square, as shown in Figure 1. The frame is composed of five straight lines, of which...

Embodiment 2

[0058] The code given by the computer is: 1060050120, a total of three codes, each code is composed of three numbers, the first number 1 of the code represents the square reference frame; the first code 060 represents the distance between the first coded straight line and the reference side The included angle is 60°; the second code 050 represents that the angle between the second coding line and the reference side is 50°; the third code 120 represents that the angle between the third coding line and the reference side is 120°. The process of forming, printing and identifying and verifying its pattern code is the same as that of Embodiment 1.

Embodiment 3

[0060] The code given by the computer is: 1060105021201, a total of three codes, each code is composed of four numbers, the first number 1 of the code represents the square reference frame; the first code is 0601, and the first three digits "060" represent The angle between the first coded straight line and the reference side is 60°, and the last number "1" means that the ratio of the width of the coded straight line to the straight line width of the reference border is 1; the second code is 0502, and the first three digits represent the second The angle between the coding straight line and the reference side is 50°, and the last number represents that the ratio of the coding straight line width to the reference border line width is 2; the third code is 1201, and the first three digits represent the third coding straight line and the reference frame The included angle of the side is 120°, and the last number represents that the ratio of the width of the coding line to the line ...

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Abstract

The invention discloses a two-dimensional linear graphic coding counter-forgery method that can be printed on the surface of products directly. The method has the advantages of strong randomness, being difficult to be decoded, and suitability for small-sized products. The method includes generation, printing, and validation of linear graphs. As for the generation of linear graphs, a computer generates a code at least including linear angle information, and draws the linear corresponding with each code in the rectangle base frame; as for the identification of linear graphs, a picture collection device obtains the pictures of linear graphs, and obtains their black-and-white edge pictures after the pre-treatment, and then obtains each straight line's slope and interception information according to black-and-white edge pictures, and eventually calculates the corresponding code. The code is generated by the computer. At last, product information is validated through the code database of the validation system.

Description

technical field [0001] The invention belongs to the field of product anti-counterfeiting, in particular to a two-dimensional linear graphic code anti-counterfeiting method that can be directly printed on the surface of a product. Background technique [0002] Among the current anti-counterfeiting methods, one is the laser holographic marking method, which uses disposable packaging, mechanical or physical concealed anti-counterfeiting markings, and counterfeiters can make large-scale copies in batches as long as they crack one of them. The other is a digital anti-counterfeiting method, whose anti-counterfeiting feature is to use computer network technology, database management technology, computer communication technology, computer coding technology and personalized information printing technology to form an anti-counterfeiting system. The anti-counterfeiting system gives each product a unique number or graphic code, which can be verified by the anti-counterfeiting company's ...

Claims

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Application Information

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IPC IPC(8): G06K1/12G06K9/18G06V30/224
Inventor 李曙光艾宇
Owner 李曙光
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