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Articles false proof multi-image hiding and fabricating method

A technology of multiple images and production methods, applied in image data processing, image data processing, instruments, etc., to achieve the effect of high degree of automation, low cost, and large amount of information hidden

Inactive Publication Date: 2004-11-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention overcomes the defect that the prior art can only hide a single figure or the production process is cumbersome, and has the characteristics of stronger anti-counterfeiting function, more convenient use, low cost and simple production process, etc.

Method used

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  • Articles false proof multi-image hiding and fabricating method
  • Articles false proof multi-image hiding and fabricating method
  • Articles false proof multi-image hiding and fabricating method

Examples

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Embodiment Construction

[0022] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0023] Its implementation process of the manufacturing method of article anti-counterfeiting multiple image hiding of the present invention is:

[0024] Such as figure 1 As shown, the text or graphics to be hidden is first input, and after sampling, overlapping, combination, synthesis and image output, the network dot encryption pattern of the article anti-counterfeiting multiple image hiding production method is obtained.

[0025] (1) Sampling: the figure 2 In A, B, C, D, E, and F, the 6 groups of text and graphic information to be encrypted and hidden are processed into digital images by computer image processing, and the figure 2 In A, B, C, D respectively, the duty ratio is 1:2, the space frequency is the first value, but the different orientations image 3 sample the digitized raster image shown; figure 2 E and F in are also sampled ...

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Abstract

The present invention is multiple anti-fake image making method. The image to be enciphered and hidden is information processed in computer and the process features that several groups of different text and graph to be enciphered and hidden are sampled in gratings of different directions and same or different spatial frequency structure, and the sampled images are superposed, combined and synthesized with properly shifted corresponding grating grains to form the lattice dot enciphered pattern. The pattern is then printed directly onto the article or its package via conventional printing process. With matched grating decoding sheet, all the information hidden in the pattern may be extracted to determine the truth of the article. The said method has powerful anti-fake ability and low cost, and is especially suitable for anti-fake of various articles and in secret communication.

Description

1. Technical field [0001] The invention relates to optical anti-counterfeiting technology, in particular to a method for manufacturing anti-counterfeiting multiple image hiding. 2. Background technology [0002] As we all know, counterfeit and shoddy products are causing great harm to society. It not only causes regular commodity manufacturers to suffer huge economic losses, consumers are deceived, but more seriously, it destroys the normal socialist market economic order. For this reason, in order to protect their products from counterfeit and shoddy products, state agencies have taken various measures against the above-mentioned items in order to protect currency, securities, bills, credit cards, passports, identity documents, etc. from being imitated by criminals. Various anti-counterfeiting methods and encryption methods. [0003] Judging from the existing anti-counterfeiting encryption methods, although the laser embossed holographic production method has extremely hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K5/00G06K9/00G06T1/00
Inventor 李大海陈祯培
Owner SICHUAN UNIV
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