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Counterfeit printing and verifying method based on cellular automation and chaotic system

A technology of cellular automaton and verification method, applied in the field of printing anti-counterfeiting, which can solve the problems of high cost and easy forgery

Inactive Publication Date: 2010-07-21
TIANJIN YIBU SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies are generally costly and easy to forge, and cannot fundamentally solve the problem of piracy
At present, some people have used digital watermarks in the anti-counterfeiting of printed matter, but the principle adopted is still the same as that of code phone anti-counterfeiting

Method used

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  • Counterfeit printing and verifying method based on cellular automation and chaotic system
  • Counterfeit printing and verifying method based on cellular automation and chaotic system
  • Counterfeit printing and verifying method based on cellular automation and chaotic system

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Experimental program
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Effect test

Embodiment Construction

[0029] The specific implementation is divided into two processes: watermark embedding and watermark extraction and verification.

[0030] 1. Watermark embedding process

[0031] The watermark embedding process includes: color space transformation of printed matter image, lifting wavelet transform, watermark matrix transformation, chaos scrambling, watermark embedding, lifting wavelet inverse transform of printed matter image after embedding watermark, color space transformation and other steps. Implementation process such as figure 1 shown.

[0032] 1. Original print image color space conversion

[0033] Assume that the size of the original print image O is N×N pixels. Convert the original image O to the CIEXYZ color space, and then convert it to CIELab to obtain three components of L, a, and b. The transformation formula from RGB space to CIELab space is as follows:

[0034] L * = 116 ...

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PUM

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Abstract

The invention relates to a counterfeit printing method based on a cellular automation and a chaotic system, relating to the fields of image processing, watermark processing and the like. The scheme of the invention comprises watermark embedment and watermark extraction, and specifically comprises the following steps of: firstly, converting the presswork images from a three primary colors space (RGB space) into a CIELab color space to obtain components of L, a and b, then carrying out the lifting wavelet transform aiming at the component L, then amplifying the watermark images to sizes equal to the presswork images and carrying out chaos transform on the same, embedding the watermark images into the component L of the presswork images on the basis; then recovering the presswork images according to the changed component L; carrying out cellular automation operation on the component L of the presswork embedded with and without watermark when extracting the watermark to obtain the watermark images. The experimental result shows that the watermark extracted by the solution can achieve the purpose of distinguishing the true from the false. The method has good robustness and can solve the problem of copyright piracy fundamentally.

Description

technical field [0001] The invention relates to a printing anti-counterfeiting method, and relates to multiple fields such as image processing and watermark processing. Background technique [0002] With the rapid development of hardware technology, high-resolution printers and scanners are also increasingly perfect and popular, so pirates can obtain pirated prints with less distortion by scanning genuine prints and reprinting them. In response to the above piracy methods, genuine printers have adopted a variety of effective methods to combat and control piracy, such as code phone anti-counterfeiting, Internet anti-counterfeiting, RFID and so on. However, these technologies are generally costly and easy to forge, and cannot fundamentally solve the problem of piracy. At present, some people have used digital watermarks in the anti-counterfeiting of printed matter, but the principle adopted is still the same as that of code phone anti-counterfeiting. Therefore, if pirates us...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 李立宗韩艳慧
Owner TIANJIN YIBU SCI & TECH DEV
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