Research on anti-counterfeiting technology of print image
based on the metameric properties
Cao Xiaohe
Beijing Key Laboratory of Signal and
Information Processing for High-end
Printing Equipments, Beijing Institute
of Graphic Communication, Beijing
102600,China
15933951525
cxhnine@qq.com
Hu Jianhua
Beijing Key Laboratory of Signal and
Information Processing for High-end
Printing Equipments, Beijing Institute
of Graphic Communication, Beijing
102600,China
13311010311
315869117@qq.com
Feng Liuping
Beijing Key Laboratory of Signal and
Information Processing for High-end
Printing Equipments, Beijing Institute
of Graphic Communication, Beijing
102600,China
18910840725
lpfeng@bigc.edu.cn
Zhu Jianle
Beijing Key Laboratory of Signal and
Information Processing for High-end
Printing Equipments, Beijing Institute
of Graphic Communication, Beijing
102600,China
13311010311
934774960@qq.com
Cao Peng
Beijing Key Laboratory of Signal and
Information Processing for High-end
Printing Equipments, Beijing Institute
of Graphic Communication, Beijing
102600,China
13311010311
2221350787@qq.com
ABSTRACT
High-precision scanners, copiers and other equipment to copy the
image compared with the original, you can achieve a very realistic
effect. There is a certain threat to the copyright of the manuscript.
In view of this phenomenon, a design method of metameric
security images with anti-counterfeiting and anti-copy function is
presented on this paper. Metameric security images are designed
and printed by the theory of metameric color and the four-color
ink spectral characteristics. The realization of anti-counterfeiting
function is based on the difference of K ink content in proportion
of CMYK. In the metameric security images, trademark image
display for the CMYK color, and visible under the sunlight. Anti-
counterfeiting images appear as monochrome K ink, and visible
under the infrared. The experimental results show that the
metameric security images with infrared detection device and its
characteristics under the infrared light source are observed the
clear hidden information. It realizes the anti-counterfeiting
function. The method can be applied to various industries in the
trademark image security.
Keywords
metameric color; CMYK; infrared light source; trademark image;
anti-counterfeiting; anti-copy
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Trademark image as a commodity logo is an important basis for
people's daily consumer shopping. Each piece of goods on the
packaging has its own logo image, but these images because there
is no anti-counterfeiting measures, often tampered with fraudulent
use or copy theft, making businesses and consumers bear the
economic losses.The frequent occurrence of such counterfeiting
and infringement has become one of the important factors that
endanger economic activities and information security. At present,
for the tampering and duplication of trademark image, the
business uses the method of combining the two-dimensional code
carrier image carrying the trademark information as the basis for
authenticating the authenticity of the commodity. Identify the
authenticity of goods operation, need to jump after the scan code
linked to a particular website, matching information, to determine
the authenticity of the goods, so that the operation process needs
to provide a huge database to store the information of goods,
complex operation and high cost. In the trademark infringement
event, the main problem is to copy the trademark image directly
or use it after tampering, that is to say, the trademark image itself
does not have anti-counterfeiting and anti copy function. Based on
the watermark embedding algorithm of convex optimization
theory, Zhang Yu studies the method and image correction
method of PCL autonomously controlling the printer, and avoids
the attack on the image during the scanning process[1]. Luo Jin
proposed a color digital image watermarking algorithm for
embedding watermarks on luminance components, which
improves the ability of anti-print scanning attacks [2]. Luo Nan
has improved the anti-print scan watermarking algorithm based on
image block DCT coefficient and the watermarking algorithm
based on image downsampling, improving its robustness and
resisting a certain degree of hard copy attacks[3]. In document [4,
5], a color image watermarking scheme designed for anti print
scanning is proposed. The anti-print scanning functions of these
algorithms are based on complex watermark extraction operations
and the need for computer assistance when the watermark is
extracted, which is not practical enough for the commercially
available trademark to achieve anti-print copy functionality.
In recent years, the metameric phenomenon combined with
information hiding technology and modern optical technology
security applications favored. Zhang Jialong using halftone
technology to form a two-dimensional bar code form of
watermark, the use of consistent color black and neutral gray print
watermark and background color, and watermark integrated into
the application of identity cards to realize the watermark hidden
under visible light, infrared watermark appeared[6]. ZHU
Mingzheng and LIU Haoxue proposed a special printing effect by
gray balance and GCR principle. The watermark is hidden under
visible light, and the watermark is visible under the infrared