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Optical detection method and device

A technology for optical detection and images to be detected, applied in character and pattern recognition, computer components, calculations, etc., can solve the problems of dispersion, the accuracy of shooting, and difficult control of quantity and position, so as to achieve low cost and good shooting. Contrast, easy to use effects

Inactive Publication Date: 2013-01-02
SUZHOU CASH GUARD CURRENCY DETECTION SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, an oblique camera is usually used to shoot the light reflected obliquely to the banknote, and a vertical camera is used to shoot the light reflected perpendicular to the banknote. When taking pictures, the number and position are not easy to control, which will affect the accuracy of shooting

Method used

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  • Optical detection method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0027] An optical detection method, the method detects the color-changing ink of banknotes, comprising the following steps:

[0028] Step 1: Place the banknotes within the effective range of the light source. The light source, at least one vertical camera and oblique camera start to work. There is at least one light source, which can be one of red, green, blue, and infrared. or more;

[0029] Step 2: The light source emits a beam of light to irradiate the banknote. The reflected light of the beam irradiating the banknote includes the light inclined to the banknote and the light perpendicular to the banknote. Part of the light inclined to the banknote is reflected by at least one mirror and then incident to the oblique camera for shooting; The light from banknotes is incident on the vertical camera, and incident on the oblique camera. The light from the vertical camera is parallel. After being reflected by a mirror, the camera is taken vertically, so that the two inciden...

Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, the difference is that this method detects holographic images, adjusts the imaging system in different orientations and cooperates with the adjustment of the reflective surface of the reflector in the lighting system, and performs multi-directional shooting of the holographic images to be detected , and then analyze the captured pictures to determine whether the images in all directions are normal.

[0038] The part of the device is the same as that of the first embodiment, and its structure will not be repeated here.

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Abstract

The invention relates to an optical detection method. The method is used for detecting the truth of color-changing ink of paper money or a holographic image. The optical detection method comprises the following steps: an image to be detected is arranged in an effective range capable of being irradiated by a light source; the light source and a camera begin to work; the light source irradiates the image to be detected; the ray of a part of the image to be detected, irradiated by a light beam inclining on the image to be detected, enters an oblique camera after being reflected by at least one reflector; the ray vertical to the image to be detected enters a vertical camera to shoot, and enters to be parallel to the ray of the oblique camera and the vertical camera, and the shot picture is analyzed. An illuminating system comprises a light source, and at least one reflector arranged on a light path from the light source to the oblique camera or the light path on which the vertical camera is; an imaging system comprises at least one vertical camera and the oblique camera, and is arranged at one side of the illuminating system. The optical detection method is simple and flexible in using method, high in identification accuracy comparison and low in cost.

Description

technical field [0001] The invention relates to an optical detection method and device. Background technique [0002] At present, through the understanding of the orientation characteristics of the new version of RMB banknotes that have been announced, the optical variable ink anti-counterfeiting technology has the characteristics of showing green and blue (or dark green) under visible light conditions at different angles. This anti-counterfeiting technology has not yet It is copied by counterfeiters, mainly because the optical ink material involved in this technology has outstanding characteristics and is difficult to copy. Optical ink anti-counterfeiting technology builds an unbreakable line of defense for the anti-counterfeiting of RMB banknotes. [0003] Through the analysis of the characteristics of the optical ink of RMB banknotes, under the condition of visible light, the light-changing inks are displayed in two colors by emitting light at different angles, while the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07D7/20
Inventor 樊小明
Owner SUZHOU CASH GUARD CURRENCY DETECTION SCI TECH
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