Anti-counterfeiting method based on laser random combination image

Abstract

The invention provides an anti-counterfeiting method based on a laser random combination image, and the method comprises the steps: printing a digital pattern on a printing stock with a laser pattern, enabling the digital pattern to be randomly overlapped with the laser pattern, generating at least one overlapping region, and forming a combination image; and then collecting the combined image, and carrying out feature extraction on the overlapped region in the combined image for carrying out feature comparison with an image to be detected so as to identify the authenticity of the image to be detected. Through the above mode, printing errors or defects which are randomly generated and cannot be reproduced in the overlapping process of the digital pattern and the laser pattern can be effectively utilized to form a combined image which has randomness, uniqueness and cannot be copied, so that the authenticity identification process can be repeatedly verified before and after the commodity is sold; effective anti-counterfeiting of the printed matter is realized at low cost under the condition that the existing printing process does not need to be changed.

Description

technical field [0001] The invention relates to the technical field of printing anti-counterfeiting, in particular to an anti-counterfeiting method based on laser random combination of images. Background technique [0002] At present, one item, one code based on digital coding technology has been widely used in the field of commodity anti-counterfeiting traceability, but the digital coding in the one item one code technology cannot effectively solve the problem whether it exists in one-dimensional code, two-dimensional code or other forms. The problem with digital codes being easily replicated. This phenomenon is reflected in the verification of the authenticity of the goods, the digital code can only achieve an effective authenticity verification after the sale, but cannot achieve the repeatable authenticity verification before and after the sale. [0003] In order to solve the problem that digital codes are easy to be copied, the patent publication number CN113159805A pro...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patent is based on the combined use of double processes. Although it can prevent counterfeiters from copying similar labels through simple photographing technology, it can still imitate the same two processes to prepare the same anti-counterfeiting label

In this process, although the laser engraving is a random pattern, the counterfeiter does not need to make exactly the same laser engraving pattern for each product, it only needs to make the laser engraving pattern exactly the same as a certain genuine product, and obtain The QR code corresponding to the laser engraving pattern can imitate the label exactly the same as the genuine product. Under the condition that the authenticity can be verified repeatedly, consumers cannot judge whether the product they get is the real product or a counterfeit product copied from the real product.

Moreover, even if it is necessary to make exactly the same laser engraving pattern for each product, it only increases the cost and difficulty of forgery, not that it is impossible to forge

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