A docking anti-counterfeiting method based on moiré mechanism

A moiré and mechanism technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of poor clarity of hidden information extraction and simple hidden form, meet the production requirements of fine, improve the quality of anti-counterfeiting, clear The effect of increasing the degree of

Active Publication Date: 2018-04-20
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a docking anti-counterfeiting method based on the moiré pattern mechanism, which solves the problems of poor clarity of hidden information extraction and simple hidden form in the existing moiré pattern anti-counterfeiting method

Method used

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  • A docking anti-counterfeiting method based on moiré mechanism
  • A docking anti-counterfeiting method based on moiré mechanism
  • A docking anti-counterfeiting method based on moiré mechanism

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Embodiment 1

[0043] Taking the hidden information embedded in the blue and magenta versions as an example, the production and operation process of the present invention will be described in detail.

[0044](1) Create a background color block. The size of the image created in Photoshop is 5cm×5cm, the resolution is 2400dpi, and the color mode is CMYK. Fill the dot area ratio of foreground color C, M, Y, K to 20% respectively. Separate the four-color channels, perform "image / mode / bitmap" processing, set the parameters to an output resolution of 2400dpi, use a halftone screen as the method, and use a frequency (screening line number) of 175LPI, and the shape is a circle, C, M, Y The screening angles of the four channels of , K are 15°, 75°, 90°, and 45° respectively. After setting, perform "image / mode / grayscale" processing, and the conversion ratio is 1.

[0045] (2) Make a hidden image. First draw hidden information graphics in Coreldraw software, the canvas size is 50mm×50mm, and save i...

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Abstract

The invention discloses a docking anti-counterfeiting method based on the moire mechanism, which establishes a background color block, separates the four channels of cyan C, magenta M, yellow Y, and black K, and processes them respectively with a custom screening function , the dot shape is circular; make a hidden image, the size and resolution of the image are the same as the background color block; divide the hidden image to form two hidden layers; embed the divided two hidden layers into the green plate and the product respectively In the red version, the four channels are merged to form a final digital image containing hidden information; a matching docking grating is produced; the fabricated docking grating is superimposed on the digital image to extract the hidden information. The present invention obviously improves the clarity of hidden information extraction due to the contrast effect generated when extracting hidden information.

Description

technical field [0001] The invention belongs to the technical field of printing anti-counterfeiting, and in particular relates to a docking anti-counterfeiting method based on a moire mechanism. Background technique [0002] Moiré anti-counterfeiting is an anti-counterfeiting technology based on the combination of halftone screening technology and Moiré effect. The method is simple and easy to implement, does not require too much equipment and printing technology, and can achieve the purpose of anti-counterfeiting without increasing production costs. Therefore, grating anti-counterfeiting is a promising anti-counterfeiting method. However, the hidden information extraction clarity of this anti-counterfeiting method is not good at present, and further improvement is needed. In addition, the hidden form is simple, and the difficulty of forgery needs to be enhanced, so as to finally improve the anti-counterfeiting quality of the moiré anti-counterfeiting method and make it bett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 郭凌华陈燕邢铁豆刘国栋
Owner SHAANXI UNIV OF SCI & TECH
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