KR20090060006A - Method and apparatus for medium genuine/counterfeit discriminating, auto teller machine - Google Patents

Abstract

A method and an apparatus for discriminating medium genuine/counterfeit, and an auto teller machine are provided to discriminate a medium regardless of a size of an image by using an image ratio. A kind of a medium is determined(S102). A ratio value of a fixed color image about a whole image value of the determined medium is calculated(S106). The medium genuine/counterfeit is determined by comparing the calculated image ratio value with a corresponding reference ratio value(S108). If the image ratio value is larger than the reference ratio value, the medium is determined as a counterfeit paper money. If the image ratio value is smaller than the reference ratio value, the medium is determined as a genuine paper money.

Description

METHOD AND APPARATUS FOR MEDIUM GENUINE / COUNTERFEIT DISCRIMINATING, AUTO TELLER MACHINE}

The present invention relates to determining the authenticity of a medium, and in particular, a medium authenticity determination method for determining the authenticity of a medium using 'R', 'G', and 'B' ratio information of image information obtained from a UV sensor. A device, and an automation device thereof.

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. For convenience of description of the present embodiment, a medium will be described using banknotes as an example.

Currently, the most widely used banknotes of currency have various sizes and patterns for each amount of money, and vending machines or ticket machines that can recognize bills determine whether counterfeit bills are imported and take out the bills according to the determined result. To be loaded one after the other.

1 generally shows a flow chart for determining the authenticity of banknotes.

Once the UV sensor provided in the banknote authenticity measuring device is composed of a UV light sensor at a position facing the other side of the UV light emitting sensor on one side of the housing, irradiating ultraviolet rays to the banknote, the response value of the corresponding banknote, ie The function of detecting the reflection value and the transmission value of the banknote is performed.

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

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

Then, a process of comparing the pattern between the converted binary image and the reference image pre-stored as a pneumocontract image is performed (s16), and if it matches the reference image according to the pattern comparison result, it is determined as normal banknote (s18). 'Yes'), if the reference image does not match, the counterfeit bill is judged ('18' in S18).

However, the process of determining the authenticity of the bill according to the prior art has the following problems.

First, since the pattern of the banknote image image and the reference image image is compared, it is difficult to determine the authenticity in real time due to a large amount of calculation for matching the patterns with each other.

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

In addition, since the fluorescence pattern of the banknote is damaged depending on the degree of contamination of the banknote and the amount of usage, there is a problem in that the fluorescence pattern provided on the banknote does not come out and thus the authenticity cannot be performed. That is, the fluorescent pattern is shown to following (a)-(c). (a) is a nine thousand yuan fluorescent pattern, (b) is a nine thousand yuan fluorescent pattern, and (c) is a nine thousand yuan fluorescent pattern.

       (a) (b) (c)

As described above, the fluorescence patterns are given differently according to the bill type, but if the fluorescence pattern is damaged, it is impossible to determine the authenticity.

In addition, if the reaction material corresponding to the light source characteristics is drawn in the counterfeit to obtain the same pattern as the fluorescent pattern of the bill, there is a possibility that the counterfeit bill is identified as a normal bill.

Accordingly, an object of the present invention is to provide a medium recognizing apparatus and method for accurately identifying a medium with only a small amount of data regardless of the degree of contamination and the amount of use of the medium, and an automated device thereof.

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

According to a feature of the present invention for achieving the above object, a winding type determination unit for judging the media winding; And a controller for determining the authenticity of the medium by using an image ratio value of a predetermined color with respect to the total image value of the media determined.

A storage unit for storing the reference ratio value for each color is further provided.

The information used for judging the paper type includes the size order of 'R', 'G' and 'B' values for each kind, the range of 'R', 'G' and 'B' values for each kind, the size information of the bill and the extraction. At least one or more of the 'R', 'G' and 'B' values are provided.

The total image value is the total sum of the 'R', 'G', and 'B' colors of the medium, and the respective image ratio values of the 'R', 'G', and 'B' colors are represented by the following equations (1) to: It is calculated | required by Formula (3).

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

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

The control unit determines that any one of the 'R', 'G', 'B' image ratio value is larger than the reference ratio value, and determines that the value is a counterfeit bill, and if it is small, it is determined to be a normal bill.

According to another feature of the invention, the winding type determination unit for determining the media winding; A calculation unit for calculating the sum of each color of the media determined and the total image value of the media, and a control unit for comparing the 'B' image ratio value with a pre-stored 'B' reference ratio value from the calculated value of the calculation unit and determining the authenticity of the medium It is configured to include.

According to another feature of the present invention, an automation apparatus including a media authenticity determining device configured as described above and a controller for controlling a normal operation of a paper money according to a bill authenticity determination process of the medium authenticity determining device and stopping the operation of a counterfeit money are stopped. An apparatus is provided.

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

If the image ratio value is larger than the reference ratio value, it is determined as a counterfeit bill.

If the image ratio value is smaller than the reference ratio value, it is determined as 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 uses any one of 'R', 'G', and 'B' aspect ratio values.

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

Here, r: R video ratio, g: G video ratio, b: B video ratio, i is the address of the pixel, P is 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 method and apparatus for determining the authenticity of a medium having such a configuration, the following effects are obtained.

First, since the image ratio is used, the authenticity can be determined without being affected 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.

In addition, the authenticity can be determined regardless of the direction of entry of the medium.

In addition, the processing speed is improved compared to the conventional image pattern method, and more accurate judgment results can be expected.

Hereinafter, a method and apparatus for determining authenticity of a medium according to the present invention will be described in detail with reference to a preferred embodiment illustrated in the accompanying drawings.

2 is a schematic configuration diagram of an apparatus for determining media authenticity according to a preferred embodiment of the present invention.

Hereinafter, the medium will be described using banknotes as an example.

Looking at the configuration of Figure 2, the inlet (not shown) of the media authenticity determination device is provided with an image sensor 102 and the UV sensor 104. The image sensor 102 serves to sense 'R', 'G', and 'B' information of the bill so that the bill type is determined by the book type determination unit 106 to read the inserted bill image. The UV sensor 104 serves to obtain a UV image of the bill.

The installation position of the image sensor 102 and the UV sensor 104 may be installed at about the same position in the inlet or when the banknote is transferred along the transfer path after the banknote image is read by the image sensor 104. The UV sensor 104 may be installed at the rear end side of the image sensor to acquire a UV image.

A paper type determination unit 106 is provided to determine the paper currency type by referring to the paper money image sensed by the image sensor 102. In order to determine the paper type, the size order of 'R', 'G', and 'B' values by bill type, the range of 'R', 'G' and 'B' values by kind, and size information of bills should be provided. A storage unit 108 for storing the same is provided. The storage unit 108 stores a reference ratio value for each bill type / color. In the present embodiment, since the authenticity is determined using the 'B' image ratio, only the 'B' reference ratio value may be stored.

When the winding type of the banknote is determined by the winding type determination unit 106, the first calculation unit 110 for calculating the individual sum and the total sum of the 'R', 'G', and 'B' colors of the banknote is provided. In this case, when calculating the total sum, a black light blue (BLB) light source is used to detect fluorescent material and solid lines of banknotes.

And a second operation unit 112 for obtaining the ratio 'R', 'G', 'B' occupies in the bill. The second operation unit 112 uses the following equations (1) to (3) to obtain the ratios 'R', 'G', and 'B'.

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

And the determination unit 114 for determining the authenticity of the bill using the 'R', 'G', 'B' ratio is provided. Here, only the 'B' color among the 'R', 'G', and 'B' colors of the UV image can be distinguished enough to be seen by the eye than the 'R' and 'G' colors. Among the 'G' and 'B' ratios, the 'B' image ratio value is compared with the 'B' reference ratio value to determine the authenticity.

The 'B' reference ratio value is a value set differently depending on the kind of paper money.

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

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

First, a banknote A is input through an injection hole.

Then, the image sensor 102 and the UV sensor 104 installed in the inlet leads the image of the bill (A) to be transferred by the transfer module (s100). The image sensor 102 extracts 'R', 'G', 'B' values and bill size information of the bill A, and the UV sensor 104 obtains UV image information.

First, the 'R', 'G', and 'B' values extracted by the image sensor 102 are transmitted to the winding type determination unit 106. Then, the winding type determination unit 106, the size order of the 'R', 'G', 'B' value for each type stored in the storage unit 108, the 'R', 'G', 'B' value of each type Range, the size information of the bill and the extracted 'R', 'G', 'B' values are sequentially compared, and the paper type of the bill is determined according to the comparison result (s102). At this time, if the winding type is distinguished by only one method, the remaining methods can be omitted.

When the bill type is determined by the book type determining unit 106, the first calculation unit 110 obtains the total sum of the 'R', 'G', and 'B' colors of the bill determined as the bill type (S104). In order to obtain the total sum of the 'R', 'G', and 'B' colors, the process of separating the blank image sensed together with the banknote image must be preceded. That is, only the actual banknote image is extracted, and each 'R', 'G', and 'B' pixel value is obtained, and the sum thereof is calculated. This process is illustrated in FIG. 4. 4 illustrates an example of extracting 'R', 'G', and 'B' values from a bill image.

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

The second operation unit 112 calculates an 'R' image ratio value, a 'G' image ratio value, and a 'B' image ratio value using equations (1) to (3) (S106).

Here, since the 'B' image is more easily distinguishable from the 'R' and 'G' images among the 'R', 'G' and 'B' images, only the 'B' image is used, and thus' The value of B 'aspect ratio is obtained. Of course, in the case of using another image, the image ratio value can be obtained.

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

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

As a result of the comparison, the determination unit 114 determines that the value of the 'B' image ratio is greater than the 'B' reference ratio value as a counterfeit note (YES in S108), while determining that it is a normal banknote in S108 (S108). 'no).

The example which judges the authenticity of a banknote is shown in FIG.

Referring to FIG. 5, when the 'B' reference ratio value P of a predetermined banknote is set to '0.32', if the image ratio value of the inserted banknote is greater than or equal to 0.32, it is determined as a counterfeit banknote, and it is normal only when it is less than or equal to Judging by the bill.

On the other hand, such a media authenticity determination device can be applied to automated devices such as banknote recognizer, ATM (Automatic Teller Machine) device, CD (Cash Dispenser) device, vending machine, money exchanger. In this case, the controller of the automated device performs a predetermined function depending on whether or not the bill of the medium recognition device is authentic. For example, if it is determined to be a normal bill, the function is normally performed. On the other hand, if it is determined to be a counterfeit bill, the function is stopped.

And optionally, the automated device or the media authenticity determination device is provided with a communication interface (not shown) so that when the bill is determined as counterfeit money, it can be reported to a financial institution. For example, when the inserted bill is identified as a counterfeit bill, various information such as a unique number of the device, an installation place, and the like are transmitted to a financial institution, so that the situation where the counterfeit bill is used is quickly recognized and coped with.

Although described with reference to the illustrated embodiment of the present invention as described above, this is merely exemplary, those skilled in the art to which the present invention pertains various modifications without departing from the spirit and scope of the present invention. It will be apparent that other embodiments may be modified and equivalent. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a flow chart for determining the authenticity of bills in general.

Figure 2 is a schematic configuration diagram of a media authenticity determination device according to an embodiment of the present invention.

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

4 is an exemplary diagram for extracting 'R', 'G', 'B' values from the bill image.

Figure 5 is a state diagram showing an example of determining the normal bill and counterfeit bill.

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

102: image sensor 104: UV sensor

106: Kwonjong judging unit 108: Storage unit

110: first operation unit 112: second operation unit

114: judgment unit

Claims (13)

Kwonjong judging unit for determining the media swelling; And, And a controller for determining the authenticity of the medium using an image ratio value of a predetermined color with respect to the total image value of the determined media type. The method of claim 1, And a storage unit for storing the reference ratio value for each color. The method of claim 2, The information used for judging the paper type includes the size order of 'R', 'G' and 'B' values for each kind, the range of 'R', 'G' and 'B' values for each kind, the size information of the bill and the extraction. At least one or more of the provided 'R', 'G', 'B' value is provided. The method of claim 2, The total image value is the total sum of the 'R', 'G', and 'B' colors of the medium, And an image ratio value of each of the colors 'R', 'G', and 'B' is obtained by the following equations (1) to (3).

Here, r: R video ratio, g: G video ratio, b: B video ratio, i is the address of the pixel, P is the total number of pixels. The method of claim 2, And the controller uses any one of 'R', 'G', and 'B' image ratio values. The method of claim 2, The control unit determines whether the 'R', 'G', 'B' image ratio value is greater than the reference ratio value is a counterfeit bill, and if small, the media authenticity determination device. Kwonjong judging unit for determining the media swelling; A calculator for calculating the sum of each color of the media determined and the total image value thereof; And, And a controller for comparing the 'B' image ratio value of the medium with a pre-stored 'B' reference ratio value from the calculated value of the calculator and determining the authenticity of the medium. Claim 1 to claim 7, wherein the authenticity of the medium comprising any one of; And a controller for controlling the normal operation of the paper money and stopping the operation of the counterfeit money according to the authenticity of the paper. Determining a media roll; Calculating a ratio value of a predetermined color image to the total image value 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 method of claim 9, If the image ratio value is larger than the reference ratio value, it is determined as a counterfeit bill, And if the image ratio value is smaller than a reference ratio value, determine the authenticity of the medium. The method of claim 9, The total image value is the total sum of the 'R', 'G', and 'B' colors of the medium, And the image ratio value is one of 'R', 'G', and 'B' image ratio values. The method of claim 11, And the 'R', 'G' and 'B' image ratio values are obtained by the following equations (1) to (3).

Here, r: R image ratio, g: G image ratio, b: B image ratio, i is the address of the pixel, P represents the total number of pixels. The method of claim 11, And a 'B' image ratio value among the 'R', 'G', and 'B' image ratio values.

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