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Low-false-alarm-rate color QR code digital watermarking method

A digital watermark and QR code technology, which is applied in the field of color QR code digital watermark with low false alarm rate, can solve the problems of large amount of embedded information in double-color images, high false alarm rate of SVD algorithm, and low invisibility, so as to achieve good invisibility Sexuality, efficiency improvement, and the effect of solving the problem of high false alarm rate

Inactive Publication Date: 2016-10-12
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0004] The present invention aims at the problems of large amount of embedded information, low invisibility, high embedding difficulty and high false alarm rate of SVD algorithm for dual-color images, and proposes a color QR code digital watermark method with low false alarm rate, by enriching the tone levels The color QR code is embedded into the color image as a watermark, and the problem of high false alarm rate of the SVD algorithm is solved by embedding audit marks

Method used

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Embodiment Construction

[0030] 1. Wavelet transform

[0031] Such as figure 1 The DWT transform subband distribution diagram shown, the color image can be decomposed into four subbands after one-level DWT transformation, namely LL (low frequency subband), HL (horizontal intermediate frequency subband), LH (vertical intermediate frequency subband), HH (high-frequency sub-band), multi-level decomposition and so on. The low-frequency sub-band is distributed in the upper left corner, which contains most of the outline and brightness information of the image. The watermark embedding here has better resistance to attack, but the invisibility will Affected; the middle frequency is distributed in the lower left and upper right corners, and the watermark embedding here has better anti-attack and invisible; the high-frequency sub-band is distributed in the lower right corner, and the watermark embedding is invisible here, but anti-attack poor.

[0032] 2. A low false alarm rate color QR code digital watermar...

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Abstract

The invention relates to a low-false-alarm-rate color QR code digital watermarking method, which is a quick and efficient double color image watermarking algorithm based on color QR codes and DWT-SVD technology. Tone-level-rich color QR codes are normalized and embedded to a carrier image obtained after DWT conversion and SVD decomposition through different channels, so that the watermarking method not only has good invisibility, but also can be resistant to conventional attacks of cutting, rotation, JPEG compression, Gaussian noise and salt-and-pepper noise and the like, and has good robustness and higher QR code decoding rate. Insertion of a lot of information can be realized through insertion and extraction of the tone-level-rich color QR codes, thereby meeting requirements of high-end companies for the watermarking algorithm; meanwhile, the method also has faster operation speed, so that efficiency is improved greatly; and through insertion of a check mark, under the condition that the watermarked carrier image obtained after attacks can be extracted normally, the problem of high false alarm rate of an SVD decomposition algorithm is effectively solved. The watermarking method has a certain application value in digital right management.

Description

technical field [0001] The invention relates to a digital watermark technology, in particular to a color QR code digital watermark method with a low false alarm rate. Background technique [0002] With the continuous development of the Internet, images, as the main carrier of information transmission, play an irreplaceable role in information transmission. However, due to the openness of images in the process of Internet transmission, the tampering and abuse of information has become increasingly serious. As the main means of copyright protection, digital watermarking technology has effectively solved most of the copyright disputes. At present, there are many watermarking technologies for images, but most watermarking technologies use binary images as watermark embeddings. Although they have copyright protection functions and fast extraction speeds, for companies that require more perfection, color watermarks are embedded in color images. The demand is increasing day by day...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021G06T2201/0065
Inventor 孙业强王晓红麻祥才郭少东刘丽丽王禹琛
Owner UNIV OF SHANGHAI FOR SCI & TECH
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