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A method for optimizing network dot parameters in network dot shape anti-counterfeiting technology

A network point and technology technology, applied in the field of optimizing network point parameters, can solve the problem of low correct decoding rate, etc., and achieve the effect of high correct decoding rate and large discrimination.

Inactive Publication Date: 2017-09-22
江阴市华盛印刷有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for optimizing network dot parameters in network dot shape anti-counterfeiting technology, which solves the problem of low correct decoding rate in the prior art when extracting anti-counterfeiting information from printed and scanned images

Method used

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  • A method for optimizing network dot parameters in network dot shape anti-counterfeiting technology
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  • A method for optimizing network dot parameters in network dot shape anti-counterfeiting technology

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Such as figure 1 Shown, the method for optimizing network dot parameter in a kind of network dot shape anti-counterfeiting technology of the present invention, specifically implement according to the following steps:

[0036] In the image processing software Photoshop, select circle, square, rhombus, and ellipse four shapes of screen dots for the continuous gray scale image and simulate the RIP screening effect to obtain four original gray scale screen images, which are respectively recorded as f 1 s (i, j), Among them, the superscript s=0,1,…,10, which means 11 different dot area ratios of 0%, 10%, 20%,…, 100%, namely f 1 s (i, j) respectively represent the original gray scale screened images with the dot area ratios of 0%, 10%, 20%, ..., 100% obtained by screening with circular dots, Respectively represent the original gray sc...

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Abstract

The invention discloses a method for optimizing network dot parameters in network dot shape anti-counterfeiting technology. First, circular, square, rhombus and elliptical network dots are selected for the continuous gray scale image, and the effect of RIP screen screening is simulated to obtain four original gray scale scale images. Then calculate the difference value of any two dots with different shapes in the original gray scale screen image, optimize the dot shape; then actually print and scan the two original gray scale screen images corresponding to the optimized dot shape ; Then, under each dot area ratio, calculate the difference between the scanned image and the difference value of the two original gray scale screened images to optimize the dot area ratio; finally, in the screened carrier image, optimize the dot area ratio Above, the binary anti-counterfeiting information is embedded by modulating the dot shape of the carrier image. When using the optimized network point of the present invention to hide anti-counterfeit information, it has a higher degree of discrimination, and has a higher correct decoding rate when extracting anti-counterfeit information.

Description

technical field [0001] The invention belongs to the field of anti-counterfeiting technology of printed matter, and in particular relates to a method for optimizing network dot parameters in the network dot shape anti-counterfeiting technology. Background technique [0002] With the rapid development of information technology and image input and output equipment, paper media such as certificates, bills, securities, etc. are easily forged and copied, which will inevitably cause huge losses to individuals, enterprises and even the country. Therefore, it is often necessary to use Various anti-counterfeiting technologies. [0003] Existing printing anti-counterfeiting technologies usually use anti-counterfeiting paper, special inks, laser holographic images, etc., which require additional printing equipment and costs. These anti-counterfeiting technologies have problems such as high cost, poor anti-counterfeiting performance and no information hiding function. [0004] Printing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 张二虎李咪丹
Owner 江阴市华盛印刷有限公司
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