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Paper money or bill authenticity identification method

A technology for bills and banknotes, which is applied in the field of banknote or bill identification and detection. It can solve the problems of high system cost, easy falling off of silver plating, inconsistent imaging, etc., and achieve clear front images, increase color effects, and enhance front light intensity. Effect

Inactive Publication Date: 2017-11-14
BEIJING NUFRONT SOFTWARE SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the inevitable problems in the detection of discoloration characteristics are many problems such as large number of hardware devices, high system cost, complex hardware circuit drive, complex mechanical structure, complex equipment installation and debugging, and difficulty in productization of prototypes.
In this case, many problems such as complex system structure and difficult debugging will inevitably appear.
[0006] The patent application number is 2007101663473, and the name is "multi-angle optical feature automatic detection device". By introducing a mirror, the optical environment of the detection area is changed. It achieves the purpose of observing the optical characteristics of two different angles in the same field of view, but the general plane mirror is made of silver plating on the back surface of the glass, because the reflection effect of the plane mirror depends on the effect of the manufacturer's silver plating, and the silver plating is Imaging inconsistencies due to easy detachment; see figure 2 , Schematic diagram of the optical path of the ghost image reflected by the plane mirror multiple times, where S is the object, S1 is the main image of the object, and S2 / S3 are other reflected images
The front surface of the plane mirror, that is, the glass surface, also reflects light. The light has to be reflected multiple times by the glass surface and the silver surface, so it will form multiple images, forming overlapping images, which affects the processing of the image judgment module.
Among them, the image formed by the first reflection by the silver surface (the main image) is the brightest, while the other images are getting darker and darker. Although it is generally not noticeable, for precision optical instruments, such as cameras, telescopes, microscopes, etc. In the equipment, these redundant images must be removed. For today's increasingly high level of counterfeiting, the principle errors caused by the defects of the optical system itself must also be removed in order to achieve the optimum system, thus laying a good foundation for product design and counterfeiting. Base

Method used

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  • Paper money or bill authenticity identification method
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  • Paper money or bill authenticity identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The embodiment of the present invention provides a counterfeit device for banknotes or bills, such as image 3 shown, including:

[0035] Cash outlet 301;

[0036] Money inlet 302;

[0037] A banknote feeding channel 303 located between the banknote outlet 301 and the banknote inlet 302;

[0038] An incident light source 304 and a total reflection prism 305 arranged on both sides of the note feeding channel 303;

[0039] A photoelectric receiver 307 arranged directly above the area to be detected 306 in the banknote delivery channel 303;

[0040] A photoelectric signal amplifying circuit 308 connected to the photoelectric receiver 307;

[0041] A signal comparison circuit 309 connected to the photoelectric signal amplification circuit 308 .

[0042] Wherein, the incident light source 304 is located obliquely above the area to be detected 306 in the banknote feeding channel 303, and irradiates the area to be detected 306 at a preset oblique angle; between the refle...

Embodiment 2

[0054] Such as Figure 4 Shown, this embodiment also includes with respect to embodiment one:

[0055] A beam splitter 410 is further arranged between the photoelectric receiver 407 and the region 406 to be detected, and the beam splitter 410 performs semi-transparent and semi-reflective light emitted by the incident light source 404 .

[0056] Wherein, the beam splitter plate 410 and the plane of the region to be detected 406 are arranged to form a preset angle.

[0057] Preferably, the beam splitter 410 should be located directly below the photoelectric receiver 407, at the same height as the incident light source 404, and the end of the beam splitter 410 close to the incident light source 404 is higher than the reference plane at an angle of 45 degrees, the beam splitter The plate 410 semi-transparently reflects the light emitted by the incident light source 404; the photoelectric receiver 407 can collect images through the beam splitter plate 410; after the light beam emi...

Embodiment 3

[0060] Figure 5 It shows the process of authenticating banknotes or bills to be detected by using the authenticating device of the present invention.

[0061] The system starts, receives banknotes from the banknote inlet, and transmits them to the preset position (area to be detected) through the banknote feeding channel, and collects images of the banknotes that arrive at this area, and the collected images include the reflected light imaging of the light source in the area to be detected , and the reflected light of the light source in the area to be detected is then reflected by the total reflection prism to form an image. After that, extract the color-changing anti-counterfeiting features of banknotes in the image, remove the background color, and determine the color values ​​of the two color-changing anti-counterfeiting features of a frame of image, by comparing the difference between the front feature color value, the side feature color value and the front side feature ...

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PUM

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Abstract

The invention discloses a counterfeit identification method for banknotes or bills, which comprises: respectively setting an incident light source and a total reflection prism on both sides of the banknote delivery channel between the banknote output port and the banknote input port; The area to be detected in the banknote channel is obliquely above, and the area to be detected is irradiated at a preset inclination angle; a photoelectric receiver is located directly above the area to be detected in the banknote delivery channel; the total reflection prism is located on the The incident light source is between the reflected light path on the area to be detected and the incident light path of the photoelectric receiver; a photoelectric signal amplification circuit is set to be connected with the photoelectric receiver of the electric receiver; a signal comparison circuit is set with the photoelectric receiver The signal amplification circuit is connected. Compared with the continuous attenuation of the multiple reflection and refraction energy of the flat mirror, the use of the total reflection prism, all the light energy is reflected from the prism, and a more ideal image will be obtained under the same lighting conditions.

Description

technical field [0001] The invention relates to the technical field of image processing and recognition, in particular to a counterfeit detection method for banknotes or bills. Background technique [0002] With the continuous development of the national economy, the volume of RMB cash transactions continues to increase. Paper money is the main currency of RMB issued by my country and plays a very important role in economic activities. There have always been criminals manufacturing and circulating counterfeit money and alterations This seriously disrupts the financial order and economic stability, and damages the public interest of the country. [0003] In order to improve the orientation ability of banknotes, anti-counterfeiting technologies such as paper anti-counterfeiting, ink anti-counterfeiting and printing anti-counterfeiting have been continuously developed and improved. In recent years, with the continuous development of anti-counterfeiting technology, the production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07D7/121
CPCG07D7/128
Inventor 陈新李蒙赵厚良唐辉成和建鲍东山
Owner BEIJING NUFRONT SOFTWARE SCI TECH
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