KR101397722B1 - Method and apparatus for medium genuine/counterfeit discriminating, auto teller machine - Google Patents

Abstract

The present invention relates to a medium authenticity discrimination method and apparatus for judging the authenticity of a medium with a color ratio of a UV image, and an automatic apparatus thereof. The present invention firstly judges the medium type. And calculates a ratio value of a predetermined color image to a total image value of the determined medium. Especially, it is better to use 'B' image ratio value. Then, the calculated 'B' image ratio value is compared with a corresponding reference ratio value, and the authenticity of the medium is determined according to the comparison result. That is, if the 'B' image ratio value is larger than the reference ratio value, it is determined that the counterfeit bill is a counterfeit bill. If the image ratio value is smaller than the reference ratio value, According to the present invention, it is possible to distinguish authenticity only by a simple operation, and it is possible to improve a processing speed and real-time processing.

UV sensor, B color, medium, bills.

Description

[0001] METHOD AND APPARATUS FOR MEDIUM GENUINE / COUNTERFEIT DISCRIMINATING, AUTO TELLER MACHINE [0002]

More particularly, the present invention relates to a medium authenticity determining method for determining authenticity of a medium by using 'R', 'G', and 'B' ratio information of image information obtained from a UV sensor, Device, and an automation device thereof.

The term " medium " used in this specification refers to, for example, banknotes, checks, tickets, certificates, etc., and may be various in thickness as compared with width or length. For convenience of description of the present embodiment, a banknote will be described as an example of a banknote.

Currently, the most widely used paper currency has various sizes and patterns depending on the amount of money. In the automatic vending machine or the automatic ticket issuing machine capable of recognizing the paper currency, it is determined whether the paper currency is a counterfeit paper currency or not, Or to load them in order.

Fig. 1 is a flow chart for discriminating whether or not the banknotes are genuine.

The UV sensor provided in the paper currency authenticity discriminating device is formed on one side of the housing with a UV light receiving sensor at a position opposite to the UV light emitting sensor and irradiates the paper currency with ultraviolet rays and measures the reaction value of the corresponding paper currency, , And detects the reflection value and the transmission value of the banknote.

When the banknote is inserted to pass through the UV sensor, the banknote image is read by the UV sensor (s10).

Then, a certain pattern is extracted from the read banknote image (s12) and converted into a binary image (s14).

Then, a process of comparing the converted binary image with a reference image stored in advance as a purging image is performed (s16). If the reference image coincides with the reference image, YES), and if it does not coincide with the reference image, it is determined to be counterfeit (NO in s18).

However, there are the following problems in the process of discriminating the authenticity of the bill according to the related art.

First, since the pattern of the banknote image is compared with the pattern of the reference image, there is a large amount of calculation for matching the patterns, and it is difficult to judge whether the banknotes are authentic in real time.

In addition, although the image is binarized to reduce the amount of comparison in pattern matching, the image may be lost in the binarization process.

In addition, since the fluorescent pattern of the banknote is damaged according to the degree of contamination and usage of the banknote, the fluorescent pattern provided on the banknote does not come out in spite of the banknote, so that the authenticity can not be performed. That is, the fluorescent patterns are shown in the following (a) to (c). (a) is the old one hundred thousand won fluorescence pattern, (b) is the five hundred thousand won fluorescence pattern, and (c) is the old 10,000 won fluorescence pattern.

       (a) (b) (c)

As described above, although the fluorescent patterns are given differently according to the currency type, if the fluorescent pattern is damaged, the authenticity can not be determined.

If the same material as the fluorescent pattern of the banknote can be obtained by drawing a reactive material corresponding to the light source characteristic on the counterfeit, there is a possibility that the counterfeit banknote is discriminated as a normal banknote.

Accordingly, it is an object of the present invention to provide a medium recognition apparatus and method, and an automation device thereof, which can accurately identify a medium by only a small amount of data irrespective of the degree of contamination and usage of the medium.

It is another object of the present invention to improve the processing speed of authenticity of media to enable real-time media recognition.

According to an aspect of the present invention for achieving the above object, And a control unit for determining whether the medium is authentic by using an image ratio value of a predetermined color with respect to a total image value of the medium determined as the denomination.

And a storage unit for storing the reference ratio value for each color.

The information used for determining the denomination class includes a size order of 'R', 'G' and 'B' for each denomination, a range of 'R', 'G' At least one of the values of 'R', 'G', and 'B' is provided.

The total image value is a total sum of colors of R, G, and B of the medium, and each image ratio value of the colors R, G, and B is expressed by the following equations (1) to Is obtained by equation (3).

Here, r: R image ratio, g: G image ratio, b: B image ratio, i represents the address of the pixel, and P represents the total number of pixels.

The controller uses one of R, G, and B image ratio values.

The control unit determines that the counterfeit bill is a counterfeit bill if any one of the 'R', 'G', and 'B' image ratio values is greater than the reference ratio value.

According to another aspect of the present invention, A controller for comparing the 'B' image ratio value and the pre-stored 'B' reference ratio value from the calculated value of the arithmetic unit and determining the authenticity of the medium, .

According to another aspect of the present invention, there is provided an information processing apparatus including a media authenticity determination device configured as described above, and an automation system including a controller that controls the media authenticity determination device to perform a normal operation if the bill is a normal bill, A device is provided.

According to still another aspect of the present invention, Calculating a ratio value of a predetermined color image to a total image value of the determined medium; Comparing the calculated image ratio value with a corresponding reference ratio value, and determining whether the vehicle is authentic according to the comparison result.

If the image ratio value is larger than the reference ratio value, it is judged to be a counterfeit banknote.

If the image ratio value is smaller than the reference ratio value, it is determined to be a normal banknote.

The total image value is a total sum of 'R', 'G' and 'B' colors of the medium, and the image ratio value is one of R, G and B image ratio values.

The image ratio values of 'R', 'G' and 'B' are obtained by the following equations (1) to (3).

Here, r: R image ratio, g: G image ratio, b: B image ratio, i represents the address of the pixel, and P represents the total number of pixels.

It is preferable to use the 'B' image ratio value among the 'R', 'G', and 'B' image ratio values.

According to the media authenticity determination method and apparatus having the above-described configuration, the following effects can be obtained.

First, since the image ratio is used, authenticity discrimination can be performed without being influenced by the size of the image. This solves the disadvantage that the conventional pattern matching technique is affected by the image size of the medium.

It is also possible to judge the authenticity regardless of the direction of entry of the medium.

Further, the processing speed is improved and a more accurate determination result can be expected than the conventional image pattern method.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A media authenticity determination method and apparatus according to the present invention will now be described in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 2 is a schematic block diagram of a media authenticity determining apparatus according to a preferred embodiment of the present invention.

Hereinafter, the medium will be described by way of example.

Referring to FIG. 2, an image sensor 102 and a UV sensor 104 are provided at an input port (not shown) of the media authenticity determination apparatus. The image sensor 102 serves to sense 'R', 'G', and 'B' information of a banknote to read a banknote image to be input and determine a banknote denomination by the denomination determining unit 106, which will be described later. The UV sensor 104 serves to acquire UV images of banknotes.

The mounting position of the image sensor 102 and the UV sensor 104 may be set at substantially the same position in the charging port or when the banknote is conveyed along the conveying path after the image of the banknote is read by the image sensor 104 A UV sensor 104 may be installed on the rear end side of the image sensor so as to acquire the UV image.

And a denomination determining unit (106) for determining the denomination of the banknote with reference to the banknote image sensed by the image sensor (102). In order to judge the denomination of the denomination, the size order of 'R', 'G', and 'B' values according to the denomination of the denomination, the range of 'R', 'G' And a storage unit 108 for storing the data. The storage unit 108 stores a reference ratio value for each bank note / color type. In this embodiment, since the authenticity judgment is performed using the 'B' image ratio, only the 'B' reference ratio value may be stored.

When the denomination determining unit 106 determines the denomination of the banknote, a first calculating unit 110 for calculating the sum of the colors 'R', 'G' and 'B' of the banknote and the total sum is provided. In this case, when calculating the total sum, a BLB (Black Light Blue) light source is used to detect the fluorescent material and the solid line of the bill.

And a second calculation unit 112 for calculating the 'R', 'G', and 'B' ratios occupied in the banknote. The second calculator 112 uses the following equations (1) to (3) to obtain the ratios 'R', 'G' and 'B'.

Here, r: R image ratio, g: G image ratio, b: B image ratio, i is the address of the pixel, and P is the total number of pixels.

The judging unit 114 judges the authenticity of the banknote using the 'R', 'G' and 'B' ratios. In this case, since only the 'B' color among the 'R', 'G', and 'B' colors of the UV image can be distinguished from the 'R' and 'G' colors visually, The 'B' image ratio value among the 'G' and 'B' ratio is compared with the 'B' reference ratio value to judge the authenticity.

The 'B' reference ratio value is a value set differently according to denomination of banknotes.

Hereinafter, a method for determining the authenticity of a bill using the 'B' image ratio value of a bill according to a preferred embodiment of the present invention will be described in detail.

FIG. 3 is a flow chart for determining the authenticity of a bill according to an embodiment of the present invention.

First, the banknote A is inserted through the input port.

Then, the image sensor 102 and the UV sensor 104 installed at the loading port read the image of the bill A conveyed by the conveying module (s100). The image sensor 102 extracts the 'R', 'G', and 'B' values of the bill A and the bill size information, and the UV sensor 104 acquires the UV image information.

R ',' G ', and' B 'values extracted by the image sensor 102 are transmitted to the denomination determining unit 106. Then, the denomination determining unit 106 compares the size order of the values of 'R', 'G', and 'B' for each denomination stored in the storage unit 108 and the values of the denominations 'R', 'G', and 'B' Range, banknote size information and the extracted values of 'R', 'G', and 'B' are sequentially compared, and the denomination of the banknote is determined according to the comparison result (s102). At this time, if one of the methods is used to classify the denomination, the remaining methods can be omitted.

When the denomination determining unit 106 determines that the banknote denomination is the banknote denomination, the first calculating unit 110 obtains an overall sum of colors R, G, and B of the denominated banknote (s104). In order to obtain the total sum of the colors 'R', 'G', and 'B', a process of separating the sensed margin image with the bill image should be performed. That is, only the actual banknote image is extracted, and each of the 'R', 'G', and 'B' pixel values is obtained, and the sum thereof is calculated. This process is illustrated in FIG. 4 is an example of extracting 'R', 'G', and 'B' values from a banknote image.

Once the total sum of banknotes is obtained in step 104, the 'R', 'G', and 'B' ratios can be obtained.

The second calculation unit 112 obtains the R, B, and B image ratio values using Equations (1) to (3) (s106).

Since the 'B' image among the 'R', 'G' and 'B' images can easily distinguish the authenticity of the paper currency from the 'R' image and the 'G' image, B 'image ratio. Of course, if another image is used, the image ratio value can be obtained.

Only the 'B' image ratio value among the 'R', 'G', and 'B' image ratio values obtained by the second calculation unit 112 is transmitted to the determination unit 114.

Then, the determination unit 114 reads the 'B' reference ratio value corresponding to the currently determined denomination in the storage unit 108, and compares the 'B' image ratio value calculated in the second operation unit 112 (S108).

If the 'B' image rate value is greater than the 'B' reference rate value, the determination unit 114 determines that the counterfeit bill is a counterfeit bill (YES in step s108) 'no).

An example of judging whether or not the banknotes are authentic is shown in Fig.

Referring to FIG. 5, if the 'B' reference ratio value P of the predetermined banknote is determined to be '0.32', if the image ratio value of the inputted banknote is greater than 0.32, it is determined as counterfeit banknotes. It is judged by banknotes.

On the other hand, such a device for authenticity determination can be applied to automation devices such as a bill recognizer, an ATM (Automatic Teller Machine) device, a CD (Cash Dispenser) device, a vending machine, and a currency exchange device. In this case, the controller of the automation device performs a predetermined function according to the authenticity of the paper currency of the medium recognition apparatus. For example, if it is discriminated as a normal bill, the function is normally performed, whereas if it is discriminated as a counterfeit bill, the function is stopped.

Optionally, the automation device or the media authenticity determining device is provided with a communication interface (not shown) so that the banknote can be reported to the financial institution when the banknote is discriminated as a counterfeit banknote. For example, if the inputted bill is discriminated as a counterfeit bill, various information such as the device's unique number and the installation location are transmitted to the financial institution so that the counterfeit bill can be quickly recognized and coped with the situation.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and alternative constructions without departing from the spirit and scope of the invention. It will be apparent that other, alternative and equivalent embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart for discriminating whether a bill is true or false;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium authenticity determining apparatus,

FIG. 3 is a flow chart for judging whether or not a bill is genuine according to an embodiment of the present invention. FIG.

4 is an example of extracting 'R', 'G', and 'B' values from a banknote image.

5 is a view showing an example of judging normal bills and counterfeit bills.

Description of the Related Art [0002]

102: image sensor 104: UV sensor

106: a denomination determining unit 108:

110: first calculation unit 112: second calculation unit

114:

Claims (13)

A denomination determining unit for determining the denomination of the medium; And, And a control unit for determining whether the medium is authentic by using values of 'R', 'G', and 'B' The total image value is the total sum of the values of 'R', 'G', and 'B' Wherein the image ratio values of R, G, and B are a ratio of a total image value to a sum of colors of R, G, and B values of all pixels. The method according to claim 1, And a storage unit for storing the reference ratio value for each color. 3. The method of claim 2, The information used for determining the denomination class includes a size order of 'R', 'G' and 'B' for each denomination, a range of 'R', 'G' Wherein at least one of the values 'R', 'G', and 'B' of the medium authenticity judgment unit is provided. delete 3. The method of claim 2, Wherein the control unit uses one of R, G, and B image ratio values. 3. The method of claim 2, Wherein the control unit determines the counterfeit banknote to be a counterfeit banknote if the image ratio value of any one of the R, G, and B images is greater than the reference ratio value of each color, . A denomination determining unit for determining the denomination of the medium; An arithmetic unit for calculating a sum of each color of the color-determined medium and a total image value thereof; And, And a controller for comparing the 'B' image ratio value of the medium with the previously stored 'B' reference ratio value from the calculated value of the operation unit, The total image value is the total sum of the values of 'R', 'G', and 'B' Wherein the 'B' image ratio value is a ratio of a total image value to a sum of 'B' values of all pixels. A media authenticity discrimination apparatus comprising: a media authenticity discrimination apparatus according to any one of claims 1 to 3 and 5 to 7; And a controller for controlling the banknote to be normally operated if the banknote is a normal banknote and to stop operation if the banknote is a counterfeit banknote according to the banknote authenticity determination process of the medium authenticity determination device. Judging the medium type; Calculating R, G, and B image ratio values for all image values of the determined medium; And, Comparing the calculated image ratio value with a corresponding reference ratio value, and determining whether the medium is authentic according to the comparison result, The total image value is the total sum of the values of 'R', 'G', and 'B' Wherein the image ratio values of R, G, and B are the ratio of the total image values to the sum of color values of R, G, and B values of all pixels. delete delete delete delete

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