JP4617483B2 - Discrimination method and discrimination device for printed matter - Google Patents

Description

The present invention relates to a printed matter determination method and a determination device, and more particularly to a suitable method for determining authenticity of a valuable printed matter or a card.

In recent years, various techniques for checking the authenticity of such valuable printed matter have been proposed in order to discriminate forgery of valuable printed matter such as banknotes and securities. As one of them, paying attention to the fact that when the pigment used in the printing ink has magnetism, a magnetic pattern corresponding to the printing design applied to the printed matter is obtained, the printed image portion of the printed matter is changed using, for example, a magnetic sensor. There is a method of detecting the presence or absence of magnetism and a magnetic pattern waveform by scanning, and discriminating an object that is not similar to a reference waveform as a fake. For example, banknote processing devices such as vending machines and ATMs are equipped with this magnetic sensor, and perform authenticity determination and ticket type determination based on the magnetic pattern of the obtained banknote and the presence or absence of magnetism.

In addition, an external magnetic field is applied to the magnetic ink to hold the magnetic flux, and after removing the external magnetic field, a magnetic sensor is used to apply a bias magnetic field according to the coercive force of the magnetic ink. There is a method of preventing the output from the magnetic sensor from passing when the body passes (see, for example, Patent Document 1). This technology is used to determine that a genuine magnetic material is used based on the residual magnetic flux density after the magnetic detection method gives magnetism to the bill and removes the magnetic field. This is a discrimination method in which an output is not output when the magnetic ink is authentic by applying an appropriate bias magnetic field and measuring using a magnetic sensor after removing the magnetic field.

In other words, in many conventional methods, a predetermined magnetic detection voltage can be obtained at a specified position when measurement is performed with a single magnetic sensor on a genuine printed matter printed with magnetic ink. Identify genuine and counterfeit products.
Japanese Patent No. 3028380

However, looking at counterfeiting of banknotes and securities, there has been a crime of making and misusing counterfeit prints based on one of the magnetic property parameters of magnetic materials. Currently, magnetic sensors used in banknote processing devices such as vending machines and ATMs include, for example, ring-type magnetic heads and MR heads. However, not all magnetic sensors detect all the characteristics of magnetic materials. For this reason, when a counterfeit ticket in which a magnetic material different from the genuine material is mixed with ink in an appropriate blending amount is checked for authenticity using a current magnetic sensor such as an MR head or a ring magnetic head, the counterfeit ticket is genuine. When a magnetic waveform similar to a ticket is shown, there is a problem that it may be erroneously determined.

In addition, among the banknotes that circulate, there are also genuine bills in which the physical amount of magnetic material is reduced compared to new genuine bills due to the wear of ink caused by friction between bills and friction by mechanical processing devices such as ATMs. .

In order to discriminate such a counterfeit ticket as a counterfeit without being confused with a worn-out genuine note, there is a lack of certainty only by checking using a conventional magnetic sensor alone. The output waveform obtained by scanning a precious printed matter with a general magnetic sensor such as a ring-type magnetic head or MR head currently used is a differential magnetic field such as initial permeability by applying a slight magnetic field. Since only the waveform is detected, it is difficult to identify the difference in magnetic material using only these output waveforms.

For example, even if magnetic ink is measured with a ring-type magnetic head or MR head, these sensors are based on the initial permeability, which is one parameter related to magnetic properties. Thus, an approximate detection voltage is obtained.

In addition, there is a method for accurately evaluating the coercive force or residual magnetic flux density as a magnetic characteristic other than the magnetic permeability, but the conventional measuring apparatus is expensive and large, and therefore cannot be mounted on a banknote processing apparatus such as an ATM. There was a problem.

On the other hand, the above-mentioned Japanese Patent No. 3028380 gives magnetism to a bill, and after removing the magnetic field, applies an appropriate bias magnetic field and measures using a magnetic sensor, so that the output is obtained when the magnetic ink is authentic. The distinction method is set so that it does not come out, and a material having a high residual magnetic flux density after removing the magnetic field is used for a real printed matter.

However, even in authenticity determination by residual magnetic flux density measurement, only one of the parameters of the magnetic characteristics is measured, and when the real object is detected using the sensor in order to deceive the mounted magnetic sensor. There is a risk that a forged printed matter is produced by predicting the voltage waveform.

The present invention has been made in view of the above circumstances, and at least 2 for measuring different parameters relating to magnetic properties of each area of a printed matter respectively printed with a printing ink containing different magnetic materials in different areas. By using two magnetic sensors and knowing the values of different parameters such as the initial magnetic permeability ratio and residual magnetic flux density of magnetic ink, counterfeit tickets using magnetic materials that are readily available are circulated in the market and become old. It is an object of the present invention to provide a method for discriminating as a fake without being confused with a genuine note.

Checking with a method using a conventional magnetic sensor alone only measures one of the parameters of the magnetic characteristics and lacks certainty. In addition, there is a method for discriminating a printed matter in which individual information is given by one information pattern formed of an ink containing a magnetic material exhibiting a magnetic characteristic unique to an excitation magnetic field,
The magnetic measurement unit including at least two different magnetic sensors for detecting a parameter of a unique magnetic property for the printed material is used to measure the magnetic property parameter of at least one information pattern of the printed material, Each of the magnetic properties is measured by the control unit in the measurement of the magnetic characteristic parameter, the measured at least two different magnetic characteristic parameters are stored in the storage unit, and the correlation between the measured values of the measured at least two different magnetic sensors is shown. At least one correlation value of a difference value, a ratio value, a sum value, and a product value with respect to the characteristic parameters is calculated by the calculation unit, and the calculated correlation value is calculated between the parameters of the reference value stored in advance. The magnetic characteristics of the magnetic material depend on whether or not it is within an allowable range of at least one correlation value of a difference value, a ratio value, a sum value, and a product value. The individual information indicating the correlation value determined in the determination section of, by displaying to identify the magnetic material of the printed material, characterized in that to determine the authenticity.

In the printed matter discrimination method of the present invention, the magnetic characteristic parameter is at least two of initial permeability, residual magnetic flux density, and coercive force.

The printed matter authenticity discriminating apparatus of the present invention discriminates a printed matter provided with individual information on at least one information pattern formed of an ink containing a magnetic material showing a magnetic characteristic unique to an excitation magnetic field on a substrate. A device,
A magnetic measurement unit for measuring a magnetic property parameter of at least one information pattern of the printed material, at least two different magnetic sensors for detecting a unique magnetic property parameter for the printed material, and a magnetic measurement unit The difference between the control unit for controlling the input of the parameter of the magnetic characteristic, the storage unit for storing the parameter of the input magnetic characteristic, and the parameter of each magnetic characteristic indicating the correlation of the parameter of the input magnetic characteristic A calculation unit that calculates at least one correlation value of a value of the value, a ratio value, a sum value, and a product value, and the calculated correlation value is a difference value between the parameters of the reference value stored in advance and the ratio value A discriminator for discriminating individual information indicated by the correlation value of the magnetic property of the magnetic material according to whether or not it is within an allowable range of at least one correlation value of a value, a sum value, and a product value; And a display unit for displaying individual information the determination,
The magnetic material of the printed matter is specified, and its authenticity is discriminated.

According to the present invention, by using at least two magnetic sensors to obtain two different magnetic properties of magnetic ink and knowing their proportions, a simple counterfeit print using a material similar to one kind of magnetic properties The present invention provides a printed matter discriminating method and a discriminating apparatus for discriminating a product as a fake without being confused with a genuine note that circulates in the market and becomes old.

Specifically, by using at least two magnetic sensors based on different parameters in magnetic properties, and knowing the values of several different parameters such as the initial magnetic permeability ratio and residual magnetic flux density, magnetic properties that are easily available It becomes possible to discriminate a counterfeit ticket using a material as a counterfeit without being confused with a genuine ticket that has circulated in the city and has become old.

The printed matter discriminating method of this embodiment measures at least two types of parameters related to the magnetic properties of the magnetic material itself used in the printed matter, and obtains these output values and the differences and ratios between them. This is a printed matter discrimination method for obtaining a difference between magnetic materials used in magnetic ink by obtaining at least two values indicating correlation such as sum, product, and the like.

Parameters relating to the magnetic properties of the magnetic material include initial magnetic permeability, residual magnetic flux density, coercive force, and the like. Furthermore, although not a parameter in magnetic characteristics, characteristics such as frequency response and magnetic orientation may be used in combination.

An embodiment of the present invention will be described with reference to FIG. Fig. 1 shows initial magnetic permeability detection using three magnetic inks, ink A using soft magnetic material 3, ink B using hard magnetic material 4, and ink C using semi-hard magnetic material 5. The result measured using two types of magnetic sensors, sensor A1 and sensor B2 which detects a residual magnetic flux density, is shown.

As a result of obtaining the waveform of the detection voltage by measuring using the sensor A1, the ink A, ink B, and ink C are at a medium level (the detection voltages when various magnetic materials are measured by the magnetic sensor are high, medium for convenience. Similarly, the results of measurement using the sensor B2 were low level for ink A, high level for ink B, and medium level for ink C. As a result of calculating the correlation value between the sensor A1 and the sensor B2 (here, the difference is calculated, but the present invention is not limited to this, a value indicating some correlation such as ratio, sum, product, etc. may be obtained). ), Ink B was (-), and ink C was almost zero (slightly +). Thus, when measuring a magnetic material with a magnetic sensor, a detection level changes with kinds of sensor.

Next, a method for performing authenticity determination by measuring a detected voltage of initial permeability will be described with reference to FIG. The magnetic sensors used are two types of magnetic sensors: a sensor A1 that detects initial magnetic permeability and a sensor B2 that detects residual magnetic flux density.

Ink A in FIG. 2 (a) shows a genuine sample using a soft magnetic material, and ink C using a commercially available magnetic material in FIG. 2 (b) shows a sample of another magnetic material different from the genuine product. FIG. 2 (c) shows a sample for adjusting the magnetic strength of ink C. When the sensor B2 is used, the detection level of a sample of another magnetic material different from the genuine product shown in FIG. 2 (b) is higher than that of the genuine sample shown in FIG. 2 (a). For this reason, FIG. 2B is excluded as another magnetic material different from the genuine product. In contrast to this, the magnetic strength adjustment sample product shown in FIG. 2 (c) attempts to deceive the sensor B2 by adjusting the magnetic strength. However, since the magnetic strength has been lowered in order to deceive the sensor B2, the output level obtained when the sensor A1 is used is lowered. Accordingly, the magnetic strength adjustment sample product shown in FIG. 2C can be excluded as the magnetic strength adjustment sample product. In other words, the magnetic material used for the genuine product is different from the magnetic material used for another magnetic material sample different from the genuine product, and the magnetic strength is adjusted in the magnetic strength adjustment sample. By measuring using the sensor B1, authenticity can be reliably determined.

Next, a plurality of types of magnetic sensors used in the present embodiment will be described. Examples of the magnetic characteristic parameters include initial magnetic permeability, residual magnetic flux density, coercive force, and the like. Further, although not related to magnetic characteristics, magnetic characteristics such as frequency response and magnetic orientation can be added.
The magnetic sensor is considered to output a detection voltage by detecting any of these.

The discriminating method according to the present embodiment is not a magnetic characteristic parameter or a magnetic characteristic parameter, but can be measured by using different magnetic sensors that can measure frequency response, magnetic orientation, etc. Is to discriminate.

In the present embodiment, a case will be described in which a magnetic sensor that detects initial magnetic permeability is used as the first sensor, and a magnetic sensor that detects residual magnetic flux density is used as the second sensor. Here, for example, sensors as shown in FIGS. 3, 4, and 5 may be used.

The sensor A1 shown in FIG. 3 is a sensor having a general ring type magnetic head 6, and the sensor B2 is a sensor having a magnet 7 and a ring type magnetic head 6. The sensor A1 measures the initial magnetic permeability when moving relative to the magnetic material, the sensor B2 magnetizes the magnetic material by the preceding magnet 7, and the residual magnetic flux density by the follow-up ring type magnetic head 6. Measure.

A sensor A1 shown in FIG. 4 is a sensor having a general ring type magnetic head, and a sensor B2 is a sensor having a magnet and a magnetic thin film element 10. As the magnetic thin film element 10, a magnetoresistive element, a magnetic impedance element, or the like may be used, but the type is not limited. When the sensor A1 moves relative to the magnetic material, the initial magnetic permeability is measured, the sensor B2 magnetizes the magnetic material 8 by the preceding magnet 7, and the magnitude of the residual magnetic flux density by the follow-up magnetic thin film element 10. Measure.

FIG. 5 is a diagram in which two sensing elements of initial permeability and residual magnetic flux density are measured by a sensor having one ring type magnetic head. The measurement is performed in the order of residual magnetic flux density and initial permeability. First, when measuring the residual magnetic flux density, the magnetic material 8 is magnetized by the preceding magnet 7, and when the magnetic material 8 arrives at the sensor having the follow-up ring type magnetic head 6, the residual magnetic flux density is large. Measure the thickness. Next, when measuring the initial permeability, an alternating magnetic field is applied to the sensor having the ring type magnetic head 6 by the DC bias magnetic field generation circuit, and the change in magnetic flux based on the permeability is measured.

In addition, as the first magnetic sensor and the second magnetic sensor, other than the magnetic sensor that can detect the residual magnetic flux density and the sensor that can detect the initial magnetic permeability, for example, the coercivity, which is another parameter in the magnetic characteristics, It is obvious that any combination of magnetic properties such as frequency response and magnetic orientation can be used, although it is not a parameter in magnetic properties.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1) FIGS. 6, 7, and 8 show an embodiment of a printed matter authenticity discriminating apparatus according to the present invention.

The apparatus will be described with reference to the configuration diagram of FIG. 6 and the flowchart of FIG. The apparatus includes a magnetic measurement unit 15, a control unit 16, a storage unit 17, a position detection unit 18, a calculation unit 19, a display unit 20, and a transport unit 27.
The transport unit 27 transports the printed material 9 for authenticity determination.
As the two different magnetic sensors, the magnetic measuring unit 15 uses a ring-type magnetic head 6 which is a general sensor A as shown in FIG. 3, and the other sensor B shown in FIG. Using the magnetic sensor constituted by the magnetic head 6, the value of the magnetic parameter is measured.
The control unit 16 amplifies the measured values of the two parameters obtained by the magnetic measurement unit 15 by the amplifier 21, performs AD conversion by the AD conversion 22, and stores the two results in the storage unit 17.
The position detection unit 18 is a device that detects the position of the printed material, and can accurately specify the position of the magnetic ink printed on the printed material 9.
The calculation unit 19 performs subtraction between the two parameters stored in the storage unit 17 to specify the magnetic material, and determines the authenticity of the printed matter 9 depending on whether it is at the specified position.
The display unit 20 displays the result of the authenticity determination of the printed material.

FIG. 8 shows a result of measuring a printed matter using the authenticity determination device of FIGS. 6 and 7. The two samples show a genuine printed material printed on the base 11 using the ink of the soft magnetic material 3 and a counterfeit printed material using a commercially available magnetic material. The results measured by are shown below. As a result of A / D conversion (analog / digital conversion) of the detection voltage by the A sensor 1, the output value is 204 (value obtained by converting the detection voltage in the range of 0 to 255) in a genuine print, and a counterfeit print using a commercially available magnetic material. 232.
Next, as a result of AD conversion of the detection voltage by the B sensor 2, the output value was 25 in the genuine printed material and 226 in the forged printed material using the commercially available magnetic material. As a calculation for the determination, the value obtained by subtracting the output value of the B sensor 2 from the output value of the A sensor 1 was obtained. As a result, 179 were genuine prints and 6 were counterfeit prints using commercially available magnetic materials. From this, for example, when binarization processing was performed with 90 or more as authentic, it was possible to reliably discriminate between genuine products and counterfeit products.

(Embodiment 2) FIGS. 9, 10, and 11 show an embodiment of a printed matter authenticity discriminating apparatus according to the present invention.

The apparatus will be described with reference to the configuration diagram of FIG. 9 and the flowchart of FIG. The apparatus includes a magnetic measurement unit 15, a control unit 16, a storage unit 17, a position detection unit 18, a calculation unit 19, a display unit 20, and a transport unit 27.
The transport unit 27 transports the printed material 9 for authenticity determination.
As the two different magnetic sensors, the magnetic measuring unit 15 uses a general ring type magnetic head 6 of the sensor A shown in FIG. 3, and the other uses the magnetic thin film element 10 of the sensor B shown in FIG. Used to measure magnetic parameter values. As the magnetic thin film element 10, a TMF sensor (trade name) was used.
The control unit 16 amplifies the measurement values of the two parameters obtained by the magnetic measurement unit 15 by the amplifier 21, rectifies the measurement values of the sensor A by the rectifier 23, and features the feature points by the feature point calculator 24. Was calculated. The measured value of the sensor B was not subjected to rectification processing, and the feature point was calculated by the feature point calculator 24. Note that the feature point calculator 24 sequentially calculates the maximum value each time the printed material moves a certain amount when the printed material is scanned by two sensors, and this is used as feature point data.
The storage unit 17 stores the result of the feature points.
The position detector 18 is a device that detects the position of the printed material, and can accurately specify the scanning position of the magnetic ink printed on the printed material 9.
The calculation unit 19 performs division between the two parameters stored in the storage unit 17 to specify the magnetic material over the entire scan area, and determines whether the printed material 9 is in accordance with whether the specified magnetic material exists at the specified position. Authenticity discrimination is performed.
The display unit displays the result of authenticity determination of the printed material.

FIG. 11 shows a result of measuring a printed matter using the authenticity determination device of FIGS. 9 and 10. One of the two samples is a genuine printed material obtained by printing the soft magnetic material 3 and the semi-hard magnetic material 5 at two locations on the base material 11, and the other is only the commercially available magnetic material 12. This is a forged printed material using The results of measuring these with the authenticity discriminating apparatus shown in FIG. 9 are shown below. A rectified waveform is obtained by rectifying the raw waveform of the voltage detected by the A sensor 1, and then the maximum value in a certain interval is calculated (the maximum value is calculated sequentially with the sensor moving distance of 4 mm as one interval). Got. Next, the maximum value in a certain section was calculated from the raw waveform of the detected voltage by the B sensor 2 to obtain a feature value. As a calculation for discrimination, the result of dividing the feature value of the B sensor 2 from the feature value of the A sensor 1, in particular, the result between the genuine printed material in the soft magnetic material 3 portion and the forged printed material using the commercially available magnetic material. Was very different. From this, it was possible to reliably discriminate between genuine products and counterfeit products.

(Embodiment 3) FIGS. 12, 13, and 14 show an embodiment of a card authenticity discriminating apparatus according to the present invention.

The apparatus will be described with reference to the configuration diagram of FIG. 12 and the flowchart of FIG. The apparatus includes a magnetic measurement unit 15, a control unit 16, a storage unit 17, a position detection unit 18, a calculation unit 19, a display unit 20, and a transport unit 27.
The transport unit 27 transports the card 13 for authenticity determination.
The magnetic measuring unit 15 includes two different magnetic sensors, one using a general ring type magnetic head 6 of the sensor A shown in FIG. 3, and the other using the magnet 7 of the sensor B shown in FIG. A magnetic sensor constituted by the head 6 is used to measure a magnetic parameter value.
The control unit 16 amplifies the measured values of the two parameters obtained by the magnetic measurement unit 15, performs AD conversion, and stores the two results in the storage unit 17.
The position detection unit 18 is a device that detects the position of the printed matter, and can accurately specify the scanning position of the magnetic ink printed on the card 13.
The calculation unit 19 specifies the magnetic material of each part in the measurement area based on the scan result stored in the storage unit 17, and based on the result, the binary of “1” and “0” Data can be recognized. For example, when the result obtained when measuring in the measurement area of the card is “soft magnetic material”, “hard magnetic material”, “soft magnetic material” in this order, “101” in binary number. And this value can be used as card specific information.
The display unit 20 displays the result of card authenticity determination.

FIG. 14 shows the result of measuring the card 13 using the authenticity discrimination device of FIGS. 12 and 13. One of the two cards is a sample of a genuine card, and the check area or hash function of the base 13 is measured using two types of inks of soft magnetic material 3 and semi-hard magnetic material 5. The data is printed as a bar code, and it looks as if the bars are equally spaced, but the soft magnetic material 3 part is “1” and the semi-hard magnetic material 5 part is “0”. It was made impossible to rewrite. The purpose of printing checksum and hash function data on a genuine card is to associate the individual information written in the magnetic stripe 14 at the time of card issuance with the checksum and hash function data. This is because when the card number 14 is rewritten, the card 13 is invalidated because the association with the checksum or hash function is different.
On the other hand, the other card is a sample of a counterfeit card, which is printed using only commercially available magnetic materials.

The result of measuring the genuine card and the counterfeit card by the authenticity discrimination device of FIG. 12 will be described. Referring to FIG. 14, the detection voltage by the A sensor 1 shows a high level in both the genuine card and the counterfeit card, and the detection voltage by the B sensor 2 shows that the soft magnetic material 3 portion has a low level in the genuine card, and The part of the semi-hard magnetic material 5 is at a high level, while the counterfeit card uses one kind of magnetic material, so that it is at a high level in all parts.

As a calculation for discriminating the magnetic material, the value of B sensor 2 was subtracted from the value of A sensor 1. This subtracted value is converted to a digital value of 8 bits (between 0 and 255) by AD conversion, and “90” is set as a threshold value for discriminating the obtained digital value from a preset magnetic material. The calculation result can be identified as a soft magnetic material for a portion where the calculation result is less than 90, and a semi-hard magnetic material for a portion of 90 or more. As a result of measuring the measurement area of the authentic card using this method, binary data “01010101” was recognized relative to the printed bar array, and unique information of the card was obtained. Further, when this is converted into a hexadecimal number, the authentic card can be used as checksum or hash value data of “55”.
On the other hand, when the counterfeit card is detected as hexadecimal data “00”, it can be determined that the card is counterfeit.

In addition, if the data such as the card number written on the magnetic stripe of the genuine card is forged by writing with a magnetic head, the checksum and hash value data will not be “55”, so this card is invalid. Can be determined.

It is explanatory drawing of the detection principle in the measuring method of the magnetic material using two types of magnetic sensors by this Embodiment. It is explanatory drawing which shows that it is possible to discriminate | determine a magnetic strength adjustment sample product by using the method of determining authenticity by measuring the detection voltage of the initial magnetic permeability by this Embodiment. It is a figure which shows the example of the magnetic sensor used with the measuring method of the initial permeability and residual magnetic flux density by this Embodiment. It is a figure which shows the example of the magnetic sensor used with the measuring method of the initial permeability and magnetic thin film element by this Embodiment. It is a figure which shows the example of the magnetic sensor used with the measuring method of the initial permeability and residual magnetic flux density by this Embodiment. 1 is a configuration diagram of a printed matter authenticity determination device according to a first embodiment. FIG. FIG. 3 is a diagram illustrating a flowchart of the first embodiment. It is a figure which shows the example which performed authenticity determination using the measuring method of the detection voltage by the two sensors by Example 1. FIG. The block diagram of the authenticity determination apparatus of the printed matter of Example 2 is shown. FIG. 6 is a diagram illustrating a flowchart of a second embodiment. It is a figure which shows the example which performed authenticity determination using the waveform shape measuring method by the two sensors by Example 2. FIG. The block diagram of the authenticity determination apparatus of the card | curd of Example 3 is shown. FIG. 6 is a diagram illustrating a flowchart of a second embodiment. It is a figure which shows the example which performed authenticity determination using the measuring method of the detection voltage of the card | curd by the two sensors by Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 A sensor 2 B sensor 3 Soft magnetic material 4 Hard magnetic material 5 Semi-hard magnetic material 6 Ring type magnetic head 7 Magnet 8 Magnetic material 9 Printed matter 10 Magnetic thin film element 11 Base material 12 Commercially available magnetic material 13 Card 14 Magnetic stripe 15 Magnetic Measurement unit 16 Control unit 17 Storage unit 18 Position detection unit 19 Calculation unit 20 Display unit 21 Amplifier 22 AD conversion 23 Rectifier 24 Feature value calculator 25 Subtractor 26 Binarization processor 27 Transport unit

Claims (2)

On a substrate, a method for discriminating a printed matter in which individual information is given by one information pattern formed with an ink containing a magnetic material exhibiting a magnetic characteristic specific to an excitation magnetic field,
A magnetic measurement unit having at least two different magnetic sensors for detecting a parameter of a unique magnetic property for the printed material is used as a magnetic property parameter of at least one information pattern of the printed material as an initial magnetic permeability and a residual magnetic flux. Measuring at least two parameters including one or both of density and coercivity ,
The measurement of each magnetic characteristic parameter in the magnetic measurement unit is controlled by the control unit,
Storing the measured parameters of at least two different magnetic properties in a storage unit;
At least one correlation value of a difference value, a ratio value, a sum value, and a product value between the parameters of each magnetic characteristic indicating the correlation between the measured values detected by the at least two different magnetic sensors is calculated by the arithmetic unit. Operate,
Whether the calculated correlation value is within an allowable range of at least one correlation value of a difference value, a ratio value, a sum value, and a product value between the parameters of the reference value stored in advance, The discriminating unit discriminates the individual information indicated by the correlation value of the magnetic properties of the magnetic material,
A method for discriminating a printed matter, characterized in that the magnetic material of the printed matter is specified by displaying and the authenticity is discriminated. A printed matter discriminating device provided with individual information by at least one information pattern formed of an ink containing a magnetic material exhibiting a magnetic characteristic specific to an excitation magnetic field on a substrate,
At least two different magnetic sensors that detect parameters of the magnetic characteristics unique to the printed material, and at least one of the initial magnetic permeability, the residual magnetic flux density, and the coercive force as the magnetic property parameters of the at least one information pattern of the printed material. A magnetic measurement unit for measuring at least two parameters including one or both ;
A control unit that controls input of parameters of magnetic characteristics measured by the magnetic measurement unit; a storage unit that stores parameters of the input magnetic characteristics;
A calculation unit that calculates at least one correlation value of a difference value, a ratio value, a sum value, and a product value with respect to each magnetic characteristic parameter indicating a correlation between the input magnetic characteristic parameters;
Whether the calculated correlation value is within an allowable range of at least one correlation value of a difference value, a ratio value, a sum value, and a product value with respect to each parameter of a reference value stored in advance. A discriminator for discriminating individual information indicated by a correlation value of magnetic properties of the material;
A display unit for displaying the determined individual information,
An apparatus for discriminating printed matter, wherein the magnetic material of the printed matter is specified and its authenticity is discriminated.

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