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An optical speckle PUF system for anti-counterfeit labels

An anti-counterfeiting label and laser speckle technology, which is applied in the field of optical speckle PUF system of anti-counterfeiting labels, can solve the problems of low error, stability and reliability.

Active Publication Date: 2019-02-15
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the surface of the scatterer is prone to physical damage and cause errors, the stability and reliability are not high during certification

Method used

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  • An optical speckle PUF system for anti-counterfeit labels
  • An optical speckle PUF system for anti-counterfeit labels
  • An optical speckle PUF system for anti-counterfeit labels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: As shown in the figure, an optical speckle PUF system for anti-counterfeiting labels includes at least one optical PUF sample, an image acquisition device and an image processing device. The optical PUF sample includes a rectangular substrate and is attached to the substrate. The laser speckle on the front side is made of glass, and the laser speckle is a plurality of randomly distributed black spots. 0.45 to 0.55 of the frontal area;

[0048] The image acquisition device includes an infrared laser 1, a first directional hole 2, a second directional hole 3, a first reflector 4, a second reflector 5, a third reflector 6, a beam expander 7, a collimating lens 8, a half Anti-half mirror 9, the first CCD camera 10 and the second CCD camera 11; Infrared laser 1, the first orientation hole 2, the second orientation hole 3 and the first reflection mirror 4 are arranged in sequence from left to right, the first orientation The hole 2, the second directional hole ...

Embodiment 2

[0056] Embodiment two: the present embodiment is basically the same as embodiment one, the difference is:

[0057]In this embodiment, the image processing device processes the received optical speckle image, and the specific process of obtaining the optical PUF is as follows:

[0058] (1) Randomly select one of the received optical speckle images, and record the pixels of the selected optical speckle image as N×M, where N is the number of horizontal pixels of the second CCD camera 11, and M is the second CCD The number of vertical pixels of the camera 11;

[0059] (2) Perform grayscale processing on the selected optical speckle image to obtain a grayscale image of N rows×M columns of pixels, and obtain the grayscale value corresponding to each pixel in the grayscale image;

[0060] (3) Binarize the grayscale image of the obtained N×M pixels, and the specific steps are as follows:

[0061] Ⅰ. Create a new two-dimensional array that can store N rows×M columns of data;

[0062...

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Abstract

The invention discloses an optical speckle PUF system for anti-counterfeit labels, includes at least one optical PUF sample, an image acquisition device and an image processing device, An optical PUFsample includes a rectangular substrate and a laser speckle attached to the front surface of the substrate, the base material is glass, Laser speckle is composed of several randomly distributed blackspeckles, the particle size of black spots is 20-60 [mu]m, the composition is acrylic acid, the area of laser speckle is 0.45 to 0.55 of the front surface area of the substrate, and the image acquisition device comprises an infrared laser, a first directional hole, a second directional hole, a first mirror, a second mirror, a third mirror, a beam expander, a collimating lens, a half-mirror and half-lens, a first CCD camera and a second CCD camera; The invention has the advantages of high stability and reliability.

Description

technical field [0001] The invention relates to an optical speckle PUF system, in particular to an optical speckle PUF system used for anti-counterfeiting labels. Background technique [0002] With the development of the market economy and the improvement of the level of science and technology, people's life has been provided with abundant commodity material resources and brought great convenience. But at the same time, counterfeit and shoddy goods are expanding at a geometric rate, which has seriously affected the healthy development of the economy, disturbed the normal market order, hindered the long-term development of enterprises, damaged the legitimate rights and interests of consumers, and seriously affected people's physical and mental health and property safety. threaten. Anti-counterfeit labels are currently the most effective measure against deceptive imitation or duplication without the permission of the owner. Traditional anti-counterfeiting labels include pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/06G06K19/02G06K7/10
CPCG06K7/10831G06K19/022G06K19/06009
Inventor 莫立锋张跃军陈俊烨郑俊蔡沛志胡鑫
Owner NINGBO UNIV
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