KR20110012912A - Apparatus and method for medium recognition - Google Patents

Abstract

PURPOSE: An apparatus and a method for medium recognition are provided to simplify the structure of the device. CONSTITUTION: A bank note kind determining unit classifies inputted bank note into each kind of money. A detecting unit(300) extract a responsive image which is outputted when the inputted bank note receiving ultraviolet ray. A determining unit determines whether inputted bank note is genuine or not by using a fluorescent image A strong unit stores information which is used for determining whether inputted bank note is genuine or not.

Description

Apparatus and method for medium recognition

The present invention relates to a medium recognition device, and more particularly, to a medium recognition device and a method using one light source and two sensors.

As used herein, the term "medium" refers to a bill, a check, a ticket, a certificate, or the like, and may be variously thinner than a width or a length. In the present specification, for convenience of description, as described above, banknotes will be described for various media.

Banknotes most widely used among currencies have various sizes and patterns for each amount of money.In financial automated machines, vending machines, and ticket vending machines that can recognize banknotes, they determine whether counterfeit money is counterfeit and based on the result of the counterfeit bills. If so, the bill is taken out.

The conventional methods for determining the authenticity of paper money using the inherent characteristics of paper money are described in detail. The method of precisely analyzing the shape, geological properties, or surface characteristics printed on paper money and the unique inks used in paper money It can be divided into the method of determining the authenticity by detecting the characteristics.

First, it is difficult to discern the authenticity of banknotes by precisely analyzing the shape or surface characteristics printed on the banknotes with the naked eye, touch, or an enlarged analyzer such as a magnifying glass or a microscope. It uses micro-letter technology that can be checked, intaglio printing technology in which convex letters or patterns are printed on banknotes, and can be recognized as touch.

As another method of the conventional banknote authenticity determination method, there is a method of determining the authenticity using the characteristics of the special ink used in the banknote. In the natural state, most of them appear as a single color, but when irradiated with a light having a wavelength of a special area such as ultraviolet rays or infrared rays, a color different from the natural state is expressed by the energy corresponding to the wavelength, and magnetic By using a substance contained inside and having a different magnetoresistance value depending on the position used in the bill, or a property of bringing about a change in color by minute heat applied to the bill. Examples of the special ink having such characteristics include ultraviolet ink, infrared ink, magnetic ink and discolorable ink.

However, the method of determining the authenticity of the banknote according to the prior art has the following problems.

That is, since the authenticity of the banknote is determined by sequentially or repeatedly irradiating the banknotes with a plurality of light sources to determine the authenticity of the banknote, the structure of the media recognition device is complicated, and a plurality of ink characteristics are applied. Since it recognizes sequentially or repeatedly, there is a problem that it takes a long time for the recognition process.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a media recognition apparatus having a simplified structure by recognizing the reaction of a special ink used in a banknote using one light source. It is.

Another object of the present invention is to provide an apparatus for recognizing a medium capable of obtaining improved discrimination power and high reliability without recognizing a plurality of ink characteristics sequentially or repeatedly, and for shortening the time required for authenticity of bills.

According to a feature of the present invention for achieving the object as described above, the present invention is a winding judging unit for classifying the paper type of the inserted banknote, the detection unit for extracting the reaction image to the ultraviolet rays of the inserted banknote, and the detection unit An apparatus for recognizing a truth, comprising: an authenticity judging unit for determining the authenticity of inserted banknotes using a fluorescent image of a banknote; and a storage unit for storing information for discriminating the types of paper money and information for determining the authenticity of banknotes. In the detection unit is composed of one UV light source for irradiating the ultraviolet light to the inserted banknote, and a CIS sensor for extracting a fluorescent image appearing on both sides of the banknote by the UV light source.

In this case, the detection unit is configured to further include a reflecting plate for reflecting the ultraviolet light so that the ultraviolet light is irradiated on both sides of the bill.

The medium recognizing apparatus further includes an image acquiring unit for separating and reflecting the reflected image expressed by the reflected light reflected from the bill and the transmitted image expressed by the transmitted light passing through the bill.

On the other hand, the present invention comprises the steps of (a) distinguishing the paper type of the inserted bill, (b) irradiating the ultraviolet light to the inserted bill by one UV light source, and (c) both sides of the bill by the two CIS sensors Extracting the fluorescence image appearing in, and (d) using the fluorescence image of the extracted banknotes to determine the authenticity of the inserted banknotes.

At this time, the step (b) is performed so that the ultraviolet light is irradiated on both sides of the bill by the reflecting plate.

And (d) step (d1) to separate the reflected image represented by the reflected light reflected from the banknote and the transmitted image represented by the transmitted light passing through the banknote, and (d2) the data reflected reflection image And comparing the transmitted image with pre-stored fluorescence image information for each kind to determine the authenticity of the inserted banknote.

In the media recognition apparatus and method according to the present invention as described above, the following effects can be expected.

That is, since the medium is recognized using only one light source, the structure of the medium recognition device can be further simplified, and the production cost of the medium recognition device can be reduced.

In addition, according to the medium recognition apparatus and method according to the present invention, since only one light source is used, only one light emission control circuit can be used, which simplifies the firmware algorithm and shortens the time required to determine the authenticity of bills. have.

In addition, according to the medium recognition apparatus and method according to the present invention, since only one light source is used, it is possible to prevent the deterioration of the discrimination quality as compared with the case of using a plurality of light sources having non-uniform light emission intensity, There is an advantage to improve the reliability.

Hereinafter, with reference to the accompanying drawings, a specific embodiment of the media recognition apparatus and method according to the present invention as described above will be described in detail.

1 is a cross-sectional view showing the configuration of a media recognition apparatus according to a specific embodiment of the present invention.

As shown in FIG. 1, the apparatus for recognizing a medium according to a specific embodiment of the present invention includes a hopper 10 on which a bill A is seated. The hopper 10 introduces the seated bill A into the media recognition device.

The banknote A seated on the hopper 10 is transferred to the detector 300. The detector 300 detects a response to the ultraviolet rays of the banknote A in order to determine the authenticity of the transferred banknote A. FIG.

The detection unit 300 is configured to include two contact image sensors (CIS: Contact Image Sensor, hereinafter referred to as "CIS sensor") and one UV light source (310). The two CIS sensors 320 are provided at positions perpendicular to the transfer path 20 of the bill A to be transferred, respectively. The CIS sensor 320 extracts an image appearing on both sides of the banknote A by ultraviolet rays emitted from the UV light source 310.

Two CIS sensors 320 are provided at positions opposite to the transfer path 20, while the UV light source 310 is provided at only one side with respect to the transfer path 20. The UV light source 310 irradiates ultraviolet rays at an angle of about 45 degrees with respect to the transfer path 20. Some of the ultraviolet rays irradiated by the UV light source 310 are reflected on the banknote A, and some of the ultraviolet rays pass through the banknote A. FIG. At this time, the fluorescent image by ultraviolet light appears on both sides of the bill (A) by the reflected light reflected from the UV light source 310 and reflected from the bill (A) and transmitted light transmitted through the bill (A). The CIS sensor 320 extracts the fluorescent image represented by the reflected light that is irradiated from the UV light source 310 and reflected by the banknote A and transmitted light passing through the banknote A. FIG. Here, the fluorescent image is not visible under normal sunlight in order to determine whether it is counterfeit, for example, refers to an image of fluorescence or phosphorescence generated when the ultraviolet ray of 10 to 380 nm wavelength is excited.

As described above, it is possible to extract the image appearing on both sides of the bill (A) using only one UV light source 310 has the advantage of reducing the production cost of the media recognition device.

Meanwhile, according to another embodiment of the present invention, the detector 300 includes two CIS sensors 320, one UV light source 310, and a reflecting plate 330.

The two CIS sensors 320 and one UV light source 310 are the same as described in the specific embodiment of the present invention described above. On the other hand, the reflecting plate 330 reflects the ultraviolet rays irradiated from the UV light source 310. That is, the reflector plate 330 reflects the ultraviolet light toward the opposite side to the side where the UV light source 310 is located with respect to the transfer path 20. Ultraviolet rays reflected by the reflector 330 react with the bill A to express a fluorescent image. The CIS sensor extracts the displayed fluorescent image.

Ultraviolet rays reflected by the reflector 330 are partially reflected from the banknote A, and partially pass through the banknote A, similarly to ultraviolet rays directly irradiated through the UV light source 310. In this case, fluorescent images appear on both sides of the banknote A by the reflected light reflected from the banknote A and the transmitted light transmitted through the banknote A, and the CIS sensor 320 extracts the fluorescent image.

2 is a block diagram of a media recognition apparatus according to a specific embodiment of the present invention.

As shown in FIG. 2, the apparatus for recognizing a medium according to the exemplary embodiment of the present invention includes an image sensor 100. The image sensor 100 detects 'R', 'G', and 'B' information of the bill A by reading an image of the bill A inserted.

The 'R', 'G', and 'B' information of the banknote A detected by the image sensor 100 is used for determining the winding type by the winding type determination unit 200. The winding type determination unit 200 distinguishes the winding types of the inserted banknotes A using the 'R', 'G', and 'B' information for each winding type of the banknote A stored in the storage unit 400 to be described later.

The bill A, which is determined by the winding type determination unit 200, is detected by the detection unit 300 in response to ultraviolet rays. The detector 300 includes one UV light source 310 and two CIS sensors 320 as described above.

The UV light source 310 is controlled by the light emission control unit 360 flashing. The emission control unit 360 detects that the bill A is transferred through the transfer path 20 and lights the UV light source 310.

The fluorescent image extracted by the CIS sensor 320 includes both a reflection image by the reflection of ultraviolet rays and a transmission image by the transmission of ultraviolet rays. The reflection image and the transmission image are separated by the image acquisition unit 370 and converted into data. That is, the two CIS sensors 320 transmit the fluorescent images extracted to the different image acquisition units 370, respectively. In this case, the image acquisition unit 370 separates the fluorescent image extracted by the CIS sensor 320 into a reflection image and a transmission image to make data. This is to enable a more accurate determination by comparing the reflection image and the transmission image of the banknote (A), respectively.

The reflection image and the transmission image data by the image acquisition unit 370 is compared with the fluorescence image information of each kind of bill (A) stored in the storage unit 400. The storage unit 400 stores information for recognizing the roll type of the bill A and information for determining whether the bill A is authentic. That is, the storage unit 400 stores the 'R', 'G', and 'B' information for each kind of paper money A for recognizing the paper type of the paper money A by the paper judging unit 200. do. In addition, the storage unit 400 stores fluorescence image information for each type for determining the authenticity of the input paper A by the authenticity determination unit 500 to be described later.

The fluorescence image information for each kind stored in the storage unit 400 is information for determining the authenticity of the banknote A through comparison with the reflection image and the transmission image data data obtained by the image acquisition unit 370. In this case, the fluorescence image information for each kind of paper stored in the storage unit 400 includes fluorescence image information according to the reflection and transmission of ultraviolet rays according to the paper currency of the inserted banknote. And the fluorescence image information for each kind stored in the storage unit 400 includes all the different fluorescence image information according to the input direction of the bill.

The fluorescence image information of each kind of bills stored in the storage unit 400 serves as a criterion for determining the authenticity of the bills A by the authenticity determination unit 500. That is, the authenticity determination unit 500 is a fluorescent image information of each kind of bill (A) stored in the storage unit 400 and the reflection image and transmission image of the bill (A) data data by the image acquisition unit 370 Compare the to determine the authenticity of the inserted bill. At this time, the storage unit 400 includes all the fluorescence image information according to the insertion direction of the banknote, the authenticity determination unit 500 can determine the authenticity of the banknote without distinguishing the direction of the banknote.

Hereinafter, a medium recognition method according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a flowchart illustrating a medium recognition method according to a specific embodiment of the present invention in detail.

As shown in Figure 3, the medium recognition method according to the present invention starts from the step of reading the image of the transferred banknotes, when the banknotes inserted through the input port is transferred (S100). That is, the image of the inserted banknote is read in order to recognize the winding type of the inserted banknote by using the 'R', 'G', and 'B' information for each kind of banknote previously stored.

Next, using the detected image of the inserted banknotes to classify the winding type of the banknotes (S110). The distinguishing and recognizing the kind of paper currency of the inserted paper money is to determine the authenticity of the paper money by comparing the reaction image of ultraviolet light according to the paper money of each paper money with the previously stored reference image.

Subsequently, ultraviolet rays are irradiated onto the banknotes of which the paper species is judged to detect a reaction to the ultraviolet rays of the banknotes (S120). At this time, the reaction to the ultraviolet light of the bill is detected using two CIS sensors and one UV light source. The two CIS sensors are provided at positions perpendicularly opposite to the transferred bill, and the UV light source is installed at an angle of about 45 degrees with respect to the bill.

Some of the ultraviolet rays irradiated by the UV light source are reflected on the banknotes, and some of them pass through the banknotes. At this time, the fluorescent image by ultraviolet light appears on both sides of the banknote by the reflected light irradiated from the UV light source and reflected by the banknote and transmitted light transmitted through the banknote. The CIS sensor extracts the fluorescent image represented by the reflected light reflected from the UV light source and the transmitted light transmitted through the banknote.

On the other hand, it is possible to reflect the ultraviolet rays irradiated from the UV light source to extract the fluorescent image appearing in response to the bill on the opposite side of the side where the UV light source is located as described above. In this case, the reflected ultraviolet rays are partially reflected from the bills, similarly to ultraviolet rays directly irradiated by the UV light source, and some of them pass through the bills so that fluorescent images appear on both sides of the bills. The CIS sensor extracts a fluorescent image by the reflected and transmitted light.

Next, the fluorescence image of the extracted banknote is separated into a reflection image and a transmission image to data (S140). The fluorescent image extracted by the CIS sensor includes both a reflection image and a transmission image. By separating the reflection image and the transmission image into data, it is possible to more accurately determine the authenticity of the banknote.

Subsequently, the data of the reflected image and the transmitted image is compared with the fluorescent image information of each kind of bills stored in advance (S140). At this time, if the fluorescence image of the extracted banknote and the fluorescence image of each kind of pre-stored banknotes are the same, it is determined as a normal banknote. On the other hand, if the fluorescence image of the extracted banknote and the pre-stored fluorescence image of each kind is not the same, it is determined as a counterfeit bill.

According to the medium recognition method according to the present invention, since the medium is recognized using only one light source, the structure of the medium recognition device can be further simplified, and the production cost of the medium recognition device can be reduced.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

1 is a cross-sectional view showing the configuration of a media recognition apparatus according to a specific embodiment of the present invention.

2 is a block diagram of a media recognition apparatus according to a specific embodiment of the present invention.

3 is a flow chart showing in detail the medium recognition method according to a specific embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

A: Banknote 10: Hopper

20: transfer path 100: image sensor

200: winding decision unit 300: detection unit

310: UV light source 320: CIS sensor

330: reflector 360: light emission control unit

370: image acquisition unit 400: storage unit

500: authenticity judgment part

Claims (6)

A winding species determination unit for dividing the winding types of the inserted banknotes; A detection unit for extracting a reaction image of the injected banknote against the ultraviolet ray; An authenticity judging unit for determining the authenticity of the inserted banknote using the fluorescence image of the banknote by the detection unit; And In the medium recognizing apparatus comprising a storage unit for storing information for distinguishing the kind of paper money and information for determining the authenticity of the paper money, The detection unit, One UV light source for irradiating ultraviolet rays to the inserted banknote; And a CIS sensor for extracting fluorescence images appearing on both sides of banknotes by the UV light source. The method of claim 1, The detection unit, And a reflector reflecting the ultraviolet rays so that the ultraviolet rays are irradiated on both sides of the banknote. The method according to claim 1 or 2, The medium recognition device, And an image acquisition unit for separating and converting the reflected image expressed by the reflected light reflected from the banknote and the transmitted image expressed by the transmitted light passing through the banknote into data. (a) classifying the paper type of the inserted banknote; (b) irradiating ultraviolet rays to the inserted banknote by one UV light source; (c) extracting fluorescence images appearing on both sides of the bill by two CIS sensors; And and (d) determining whether the inserted banknote is authentic by using the extracted fluorescence image of the banknote. The method of claim 4, wherein In step (b), And the ultraviolet rays are irradiated on both sides of the banknote by a reflecting plate. The method according to claim 4 or 5, The step (d) (d1) separating and converting the reflected image expressed by the reflected light reflected from the banknote into a transmitted image expressed by the transmitted light passing through the banknote; and (d2) comparing the data reflected image and the transmitted image with previously stored fluorescent image information for each kind of paper to determine the authenticity of the inserted paper money.

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