Print domain trademark anti-counterfeit method based on digital watermark technology

Abstract

The invention relates to a print field mark false-proof method, based on digit watermark technique, wherein the mark image is embedded with watermark false-proof information, which comprises: 1, using self-adaptable watermark strength to embed two-dimension random copy watermark into the idle field of original mark image, to generate false-proof mark image; 2, using false-proof mark image and one-dimension Ladon transformation to generate self-registration template, to be used to calculate self-registration geometrical deformation parameter at the mark false check step; 3, generating two-dimension random copy watermark which is same as in step 1; the image collector collects tested mark image, extracting self-registration parameter; based on self-registration parameter, synchronizing the two-dimension random copy watermark; based on synchronized watermark and tested mark image, using self-related judgment, to realize the recognition of real and false mark.

Description

technical field [0001] The invention belongs to the field of anti-counterfeiting technology, and in particular relates to an anti-counterfeiting method for trademarks in the printing field based on digital watermarking technology, which is used for anti-counterfeiting of trademarks in the printing field and realizes identification of genuine and counterfeit trademarks in printed products. Background technique [0002] As a novel information hiding technology, digital watermarking provides a new solution to solve a series of problems such as copyright protection, source authentication, tampering authentication, online distribution, user tracking and identity authentication on the open network. The digital watermarking technology with image as the research object has been widely concerned by academic circles at home and abroad, and has been applied to a certain extent on the Internet. It mainly plays a good role in protecting digital image copyright. Digital image watermarking...

AI Technical Summary

Problems solved by technology

[0003] On the other hand, counterfeit and shoddy goods are rampant in China's circulation market, and it is difficult to take effective preventive measures because trademarks are easy to be counterfeited by printing in large quantities

Currently widely used anti-counterfeiting technologies include barcode technology, laser printing and lithography, laser hologram, laser anti-counterfeiting, special printing anti-counterfeiting, fluorescent anti-counterfeiting, magnetic anti-counterfeiting and various ink anti-counterfeiting, etc. These anti-counterfeiting technologies still exist in the process of commodity circulation. Many disadvantages, such as poor technology exclusivity and uniqueness; easy forgery and leakage of core technology; passing on the normal cost of anti-counterfeiting identification to consumers, etc.

[0004] General electronic encryption technology and most digital watermarking methods only provide anti-counterfeiting functions in the digital domain for images, and cannot resist geometric attacks and modulus-digital-analog attacks similar to printing and scanning, and cannot perform anti-counterfeiting functions in the analog domain

If the image embedded with watermark is transmitted in the analog domain in the form of paper, and the watermark with anti-counterfeiting information is detected, the watermark has gone through printing / printing (digital-to-analog conversion) and scanning / photographing (analog-to-digital conversion) along with the image This process introduces a lot of noise (such as thermal noise, scanning jitter noise, white balance noise, geometric deformation, etc.), and the watermark information is largely destroyed, which brings great difficulty to the design of robust watermarking algorithm.

The use of digital watermarking technology for trademark anti-counterfeiting not only requires the algorithm to be able to resist the information loss caused by a printing / printing scanning process, but also to achieve the secondary printing / printing of re-printing / printing, re-scanning, and the watermark after scanning / photographing. Effective anti-counterfeiting effect, which makes the application of digital watermarking technology in the field of trademark anti-counterfeiting in the printing field more challenging

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