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QR (Quick Response) code watermarking algorithm with strong robustness

A strong robustness, QR code technology, applied in the field of anti-counterfeiting technology and information security, can solve the problems of invisibility and robustness of watermarking system, to ensure invisibility, enhance robustness, and ensure invulnerability to attack. Effect

Inactive Publication Date: 2013-06-12
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the conflicting problems of the invisibility and robustness of the existing watermarking system, the present invention proposes a strong robustness QR code watermarking algorithm, which uses discrete wavelet transform technology to ensure the invisibility of the watermarking The error correction ability of the code improves the robustness of the watermarking system

Method used

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  • QR (Quick Response) code watermarking algorithm with strong robustness
  • QR (Quick Response) code watermarking algorithm with strong robustness

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] figure 1 It is a flowchart of the watermark embedding algorithm in the strong robust QR code watermarking algorithm of the present invention.

[0015] Such as figure 1 As shown, the flow chart of the algorithm for embedding watermark into a color carrier image has the following steps:

[0016] Step S1-101:

[0017] Encode the watermark information in accordance with relevant regulations in GB / T 18284-2000 to generate a QR code watermark image;

[0018] Step S1-102:

[0019] Use Arnold scrambling technology to encrypt the generated QR code.

[0020] Step S1-103:

[0021] Perform two-level wavelet decomposition on the blue channel image of the color carrier image, and obtain the various wavelet decomposition coefficients d 1 θ (i, j), where 1=1,2, represents the number of wavelet decomposition levels; θ=0,1,2,3 represent the wavelet coefficients in low frequency, horizontal, vertical and diagonal directions, respectively.

[0022] Step S1-104:

[0023] Intermediate frequency coeffici...

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Abstract

The invention provides a digital watermarking algorithm for the enhancement of the robustness of a watermarking system, wherein the algorithm comprises the steps of coding specific marking information as a quick response matrix code (QR (Quick Response) code), as a digital watermark, and making use of discrete wavelet transform to embed the QR code into an intermediate frequency coefficient after secondary wavelet decomposition of a carrier image. Therefore, under the premise of assurance of the invisibility of the watermark, the enhancement of the watermark robustness is achieved. The simulation experimental result of a watermark attack indicates that as the digital watermark, the QR code is capable of largely enhancing the robustness of the watermarking system. The digital watermarking algorithm can be widely used in the fields of copyright protection, anti-counterfeiting and the like, and has certain practical value.

Description

Technical field [0001] The invention belongs to the field of anti-counterfeiting technology and information security, and particularly relates to a strong robust QR code digital watermarking algorithm. Background technique [0002] Digital watermarking technology utilizes the unidentified characteristics of human sensory organs and the data redundancy in the digital signal itself, and hides the identification information in digital products such as digital images, videos, and audios through a certain algorithm. This technology can realize the property rights of digital products. Protection and tamper identification. Two-dimensional bar code technology is a standardized information storage and automatic identification technology developed on the basis of computer image processing technology and combined coding principles. It has large information capacity, wide coding range, strong error correction ability, and certain anti-counterfeiting ability. Performance has been widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 王子煜孙刘杰王文举
Owner UNIV OF SHANGHAI FOR SCI & TECH
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