Anti-counterfeiting method of anti-printing, printing and photographing based on color image
A color image, color technology, applied in the field of anti-counterfeiting and information security, can solve problems such as difficulty in extracting secret information
Active Publication Date: 2021-04-30
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0004] The present invention aims at the difficulty in extracting secret information from images acquired due to the change of ambient light brightness when shooting with a mobile phone for commodity packaging. Printing, printing and shooting are very robust
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[0030] The invention is based on the anti-printing, printing and photographing anti-counterfeiting method of color images. First, the secret information, namely the color QR code, is holographically processed and normalized by using the holographic technology; then, the color carrier image is converted from the RGB color space to the YCbCr color space. , and perform Contoulet transformation on each channel, take the low-frequency sub-bands for SVD decomposition to obtain a diagonal matrix; finally, the secret information of holographic processing is embedded in the color carrier image by channel, and the corresponding inverse transformation is performed to restore the final dense image.
[0031] like figure 1 The embedded flowchart of the anti-printing, printing and photographing anti-counterfeiting method based on color images is shown, and the specific steps are as follows:
[0032] 1. The secret information, namely the color QR code, is divided into R, G and B channels for ...
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The invention relates to an anti-counterfeiting method based on color image printing, printing and shooting. Firstly, the secret information, namely the color QR code, is holographically processed and normalized by using holographic technology; then, the color carrier image is converted from RGB color space to YCbCr color space, and Contoulet transform is performed on each channel, and the low-frequency sub-band is decomposed by SVD to obtain a diagonal matrix; finally, the secret information of holographic processing is embedded in the color carrier image in sub-channels, and the corresponding inverse transformation is performed to restore the final secret information image. The method of the present invention has strong robustness against printing, printing and shooting, and after printing, printing and shooting after general attacks such as compression, filtering, rotation and cutting, the color QR code can still be extracted and correctly identified; embedding Large amount of information and good invisibility; the technology is convenient and quick to use mobile devices, and has good application value in the intelligentization of logistics information systems and anti-counterfeiting of commodity packaging.
Description
technical field [0001] The invention relates to an anti-counterfeiting and information security technology, in particular to a color image-based anti-printing, printing and photographing anti-counterfeiting method. Background technique [0002] In modern society, packaging printed matter plays an important role in commodity circulation, but counterfeit and shoddy commodities are also increasing, so the research on printed matter anti-counterfeiting technology has attracted more and more attention. With the development of the Internet of Things technology, combined with the commonly used mobile phone and QR code technology, it is a new research direction to realize the intelligent anti-counterfeiting technology of the logistics information system. [0003] At present, most of the anti-counterfeiting technologies for printed products are used to solve the problems of anti-printing, printing and scanning of images, but the scanning equipment is not easy to obtain, the scanning ...
Claims
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IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 王晓红王春霞肖颖孙业强刘丽丽王禹琛黄中秋卢辉刘芳庞云杰杨乾坤
Owner UNIV OF SHANGHAI FOR SCI & TECH