Method for achieving Moire pattern anti-counterfeiting in halftone areas of images

Abstract

The invention discloses a method for achieving Moire pattern anti-counterfeiting in halftone areas of images. The method comprises the following steps: (1) preparing original images and anti-counterfeiting information; (2) carrying out halftone processing; (3) encrypting the anti-counterfeiting information; and (4) synthesizing images. According to the method, selection ranges of the original images and the anti-counterfeiting information are larger; the anti-counterfeiting information is encrypted and decoded in the images; the concealment performance and the extraction and recognition performance are relatively high.

Description

technical field [0001] The invention belongs to the technical field of grating anti-counterfeiting, and in particular relates to a method for realizing moiré anti-counterfeiting in the midtone area of ​​an image. Background technique [0002] At present, most of the main printing anti-counterfeiting technologies are based on high-precision equipment and special materials. The cost of printing anti-counterfeiting is relatively high, and once the materials and equipment used for printing anti-counterfeiting are obtained, they will be copied in large numbers, thus losing anti-counterfeiting effect. Images and texts that need to be printed and reproduced are usually output through halftone screening. The anti-counterfeiting technology based on moiré is a kind of anti-counterfeiting technology based on the current printing anti-counterfeiting technology and the production conditions of ordinary printing enterprises. Small laziness, simple anti-counterfeiting process, good anti-c...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, with the increase of anti-counterfeiting information and the increase of complexity, the concealment of anti-counterfeiti

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