JP7613080B2 - Authenticity determination device and program - Google Patents

Description

The present invention relates to an authenticity determination device and a program therefor.

When opening an account at a financial institution, identification such as a driver's license is required to verify the individual's identity, but there has been an increase in cases where ID cards are forged to open accounts under the guise of a different person for criminal purposes such as special fraud.

At a typical financial institution, the user visits the institution and submits their ID card, and the financial institution then uses the submitted ID card to verify the user's identity in person. In this case, the ID card can be carefully observed, and any abnormalities can be detected by the feel of the card. In addition, recent ID cards are equipped with an IC function, so checking the IC allows for more reliable identity verification.

Patent document 1 also describes an authenticity determination device that determines the authenticity of an ID card from an image of the ID card face captured by a scanner, and it is also possible to determine the authenticity of an ID card by reading a submitted ID card with a scanner.

JP 2011-34535 A

Recently, online financial institutions such as online banks have become common. Some of these types of financial institutions verify the identity of the customer by taking a picture of the face of the ID card with a camera on a smartphone or other device and sending the image to the financial institution.

In this case, identity verification is done only by image and not face-to-face, so there is a need for ingenuity in detecting counterfeits. For example, if a person commits a counterfeit by pasting a false name printed on a commercially available printer in the name section of an ID card, the counterfeit may not be visible from the image of the card alone.

In order to detect such counterfeits, there are cases where an image showing the thickness of the ID card is requested to be submitted, but if a counterfeit is made by pasting a thin piece of paper with a false name printed on it over the name section of a genuine ID card, the counterfeit is difficult to detect even with the image.

The present invention has been made in consideration of the above problems, and aims to provide an authenticity determination device etc. that can suitably determine the authenticity of identification cards.

The first invention for solving the above-mentioned problems is an authenticity determination device for an identification card, which is characterized in having an authenticity determination means that uses an image of the identification card and determines the authenticity of the identification card based on the angle of line segments in a specified direction of multiple characters of on-demand information formed on the identification card relative to the direction of a reference line in the image.

The authenticity determination device of the present invention uses an image of an ID card to determine the authenticity of the ID card based on the angle in the image of the line segments in a predetermined direction of multiple characters of on-demand information (information that differs for each ID card, such as name and date of birth). The on-demand information of an ID card is usually printed in one go by the same printing mechanism using a thermal head or the like, and in the case of a genuine ID card, the angle of the line segments is assumed to be a constant value derived from the printing mechanism such as a thermal head. On the other hand, if a printed matter with a false name or the like printed on it is attached to the ID card, the angle of the line segments of the characters of the printed matter may be shifted due to misalignment at the time of attachment. Therefore, the present invention makes it possible to determine the authenticity of an ID card based on the angle of the line segments, and can effectively detect counterfeiting, such as by attaching a thin printed matter with a false name or the like printed on it to the ID card.

It is preferable that the authenticity determination means obtains angles of the line segments of the multiple characters of the on-demand information with respect to the direction of the reference line, and determines that the identification card is not authentic if the angles of the multiple characters are not within a certain range. The reference line is, for example, a ruled line formed on the identification card.
More specifically, in the present invention, the angle of the line segment is calculated for a plurality of characters as described above, and if the angle falls within a certain range, the identification card is determined to be genuine, and if not, it is determined to be inauthentic. A ruled line formed on the identification card can be used as a reference line for calculating the angle, and this can be detected from the identification card and used to calculate the angle.

The characters are characters printed using, for example, a thermal head. It is also preferable that the identification card is a flat rectangular card, and that the predetermined direction corresponds to the direction of a short side of the card.
For identification cards, a thermal head is usually used when printing the characters of on-demand information, and accurate authenticity determination is possible by making the angle of the line segment corresponding to the arrangement direction of the heating elements of the thermal head and the transport direction of the identification card during printing constant. In particular, it is preferable in terms of accuracy to make the direction of the line segment used for authenticity determination correspond to the arrangement direction of the heating elements of the thermal head, and in the case of a flat rectangular card, the arrangement direction generally corresponds to the short side direction of the card.

It is desirable that the authenticity determining device has a receiving means for receiving an image of the identification card from a user terminal.
This makes it possible to construct an authenticity determination system using a network, which determines authenticity using an image of an identification card sent from a user terminal.

A second invention is a program for causing a computer to function as an authenticity determining device for an identification card, the authenticity determining device having an authenticity determining means for using an image of the identification card to determine the authenticity of the identification card based on the angle of line segments in a specified direction of multiple characters of on-demand information formed on the identification card relative to the direction of a reference line in the image.

The present invention provides an authenticity determination device that can effectively determine the authenticity of an identification card.

FIG. 1 shows an authenticity determination system 1. FIG. 2 is a diagram showing the hardware configuration of an authenticity determination device 3. FIG. 2 is a diagram showing the hardware configuration of a user terminal 5. FIG. 2 is a diagram showing the functional configuration of an authenticity determination device 3. FIG. 1 shows an ID card 10. 3A to 3C are diagrams for explaining printing on an ID card 10. 1 is a flowchart showing the flow of an authenticity determining method. An example of the ID card 10 photography screen. FIG. 13 is a diagram for explaining an authenticity determination method. FIG. 13 is a diagram for explaining an authenticity determination method. FIG. 13 is a diagram for explaining an authenticity determination method.

The following describes in detail a preferred embodiment of the present invention with reference to the drawings.

(1. Authenticity Determination System 1)
1 is a diagram showing an authenticity determination system 1 having an authenticity determination device 3 according to an embodiment of the present invention. The authenticity determination system 1 is configured by connecting the authenticity determination device 3 and a user terminal 5 via a network so that they can communicate with each other. In the authenticity determination system 1, a captured image of a user's ID card 10 (an image of the ID card 10) is transmitted from the user terminal 5 to the authenticity determination device 3, and the authenticity determination device 3 determines the authenticity of the ID card 10 from the captured image.

Figure 2 is a diagram showing the hardware configuration of the authenticity determination device 3. The authenticity determination device 3 can be realized by a computer configured by connecting a control unit 31, a memory unit 32, a display unit 33, an input unit 34, a communication unit 35, etc. via a bus or the like. However, the authenticity determination device 3 is not limited to this, and various configurations can be used as appropriate.

The control unit 31 is composed of a CPU, ROM, RAM, etc. The CPU loads programs related to the processing of the authenticity determination device 3 stored in storage media such as the memory unit 32 and ROM into a work area on the RAM and executes them. The ROM is a non-volatile memory, and permanently stores programs such as the boot program and BIOS, as well as data. The RAM is a volatile memory, and temporarily stores programs and data loaded from the memory unit 32, ROM, etc., and also has a work area that the control unit 31 uses to perform various processes.

The storage unit 32 is a hard disk drive, solid state drive, flash memory, etc., and stores the programs executed by the authenticity determination device 3 during the processing described below, data necessary for program execution, the OS, etc. These programs and data are read and executed by the control unit 31 as necessary.

The display unit 33 has a display device such as a liquid crystal panel, and displays various display screens related to the processing of the authenticity determination device 3.
The input unit 34 is an input device such as a touch panel, a keyboard, a mouse, or a numeric keypad, and outputs input data to the control unit 31.
The communication unit 35 is a communication interface that mediates communication with the user terminal 5 and the like via a network.

The user terminal 5 is a camera-equipped terminal carried by the user, which takes a picture of the ID card 10 and transmits the captured image to the authenticity determination device 3. As the user terminal 5, for example, a mobile terminal such as a smartphone or a tablet terminal is used.

Figure 3 is a diagram showing the hardware configuration of the user terminal 5. As shown in Figure 3, the user terminal 5 is configured by connecting a control unit 51, a memory unit 52, a display unit 53, an input unit 54, a communication unit 55, a camera 56, an audio input/output unit 57, etc., via a bus or the like. However, this is not limited to this, and various configurations can be used as appropriate.

The control unit 51, the memory unit 52, and the communication unit 55 are substantially the same as the control unit 31, the memory unit 32, and the communication unit 35 described above. The display unit 53 has a display device such as a liquid crystal panel, and a touch panel is provided as the input unit 54 for inputting data to the user terminal 5. The audio input/output unit 57 includes a microphone and a speaker used for audio input and output.

Camera 56 is an area camera that is composed of an optical lens, an imaging element such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal-Oxide Semiconductor), an A/D (Analog/Digital) converter, etc. Camera 56 photoelectrically converts the subject image input through the optical lens using the imaging element to generate an analog image signal. The A/D converter then converts the analog image signal into digital image data.

(2. Functions of Authenticity Determination Device 3)
4 is a diagram showing a functional configuration of the authenticity determination device 3. The authenticity determination device 3 includes a receiving means 301, an authenticity determination means 302, a display means 303, and the like.

The receiving means 301 is a means by which the control unit 31 of the authenticity determination device 3 receives a captured image of the ID card 10 from the user terminal 5 via the communication unit 35.

The authenticity determination means 302 determines the authenticity of the ID card 10 by the control unit 31 of the authenticity determination device 3 using a photographed image of the ID card 10 received from the user terminal 5. Details of this authenticity determination will be described later.

The display means 303 is a means by which the control unit 31 of the authenticity determination device 3 displays a warning on the display unit 33 when the ID card 10 is not determined to be authentic in the above determination.

(3. ID Card 10)
In this embodiment, the ID card 10 is an identity card that is the subject of authentication. An identity card is a medium used for identity verification by financial institutions, mobile phone carriers, etc., and is, for example, a driver's license, a My Number card, a residence card, a special permanent resident card, etc.

Figure 5(a) is a diagram showing an overview of an ID card 10, and shows a schematic example of the face of an ID card 10. The ID card 10 is a flat rectangular card substrate on which the card holder's name 12, date of birth 13, address 14, face image 18, date of issue 15 of the ID card 10, issue number 16, expiration date 17, etc. are printed.

Of the ID cards 10, the name 12, the date of birth 13 (except for "year", "month", "day", and "birth"), the address 14, the facial image 18, the issue date 15 (except for "year", "month", and "day"), the issue number 16 (except for "number" and "issue number"), the expiration date 17, etc. are on-demand information that differs for each individual ID card 10, and are formed by printing at fixed positions on the card substrate using a thermal transfer method that uses a thermal head. The characters other than the facial image 18 are printed using a melting type thermal transfer method, and the facial image 18 is printed using a dye-sublimation type thermal transfer method.

On the other hand, the characters "name", "address", "date of issue", and "number" indicating the columns for writing the name 12, address 14, date of issue 15, and issue number 16, the lines 11 in the columns for writing the name 12, date of birth 13, address 14, date of issue 15, and issue number 16, the characters "year", "month", "day", and "birth" for the date of birth 13, the characters "year", "month", and "day" for the date of issue 15, and the characters "no." and "issue number" for the issue number 16 are all used in common on each ID card 10.

These letters or lines 11 are formed in advance at specific positions on the card substrate using a printing method such as offset printing or letterpress printing before the on-demand information is printed, and are called the pre-printed portion. Figure 5(b) shows an extracted pre-printed portion from an ID card 10, and the ID card 10 is manufactured by printing the on-demand information on a card substrate on which a pre-printed portion has already been formed, as shown in Figure 5(b). The configuration of the on-demand information and pre-printed portion varies depending on the type of ID card 10, such as a driver's license, My Number card, residence card, or special permanent resident card.

(4. Thermal transfer printing method)
Printing by the thermal transfer method is performed by a thermal transfer printer 100 shown in Fig. 6(a). In the thermal transfer printer 100, a thermal transfer ribbon 200 wound around a supply reel 101 is unwound and conveyed in the conveying direction of the ID card 10 shown by the arrow, while applying heat to the thermal transfer ribbon 200 by a thermal head 110 along the way, and the transfer layer of the thermal transfer ribbon 200 is transferred to the ID card 10 being conveyed. After transfer, the thermal transfer ribbon 200 is wound up by a take-up reel 102.

The thermal head 110 has multiple heating elements 111 arranged in a straight line along a direction perpendicular to the transport direction of the ID card 10 on a plane (corresponding to the normal direction to the paper surface in FIG. 6(a)), as shown in FIG. 6(b). By controlling the on/off heating of each heating element 111, characters and other on-demand information on the ID card 10 are printed. The transport direction of the ID card 10 corresponds to the long side direction of the ID card 10, and the arrangement direction of the heating elements 111 corresponds to the short side direction of the ID card 10 (hereinafter referred to as the vertical direction).

(4. Authenticity Determination Method)
Fig. 7 is a flowchart showing the flow of the authenticity determination method executed by the authenticity determination system 1. S1 to S2 in Fig. 7 are processes executed by the control unit 51 of the user terminal 5 by controlling each unit of the user terminal 5, and S3 to S7 are processes executed by the control unit 31 of the authenticity determination device 3 by controlling each unit of the authenticity determination device 3.

In this embodiment, the user first operates the user terminal 5 to launch a dedicated application program that is pre-stored in the memory unit 52. The user terminal 5 then displays a menu screen (not shown) on the display unit 53, and starts the camera 56 in accordance with the user's selection on the menu screen to capture an image of the face of the ID card 10 (S1).

Figure 8 shows an example of the screen for capturing an ID card 10 at this time. In this embodiment, when the camera is started, instructions are displayed on the display unit 53 of the user terminal 5 to prompt the user to place the ID card 10 within a specified frame 531, and then the ID card 10 is captured.

When the user terminal 5 photographs the ID card 10, it transmits the photographed image to the authenticity determination device 3 (S2). When the authenticity determination device 3 receives the photographed image of the ID card 10 (S3), it uses the photographed image to determine the authenticity of the ID card 10 (S4).

In this embodiment, the authenticity is determined by calculating the angle of a line segment in a specific direction in a captured image for multiple characters in the on-demand information on the ID card 10, and then based on this angle.

In other words, on a real ID card 10, all characters of the on-demand information are printed in one go by a thermal head 110 having heating elements 111 arranged in a straight line as shown in FIG. 6(b). Therefore, the angle of the vertical (predetermined direction) line segments of the characters of the on-demand information, i.e., the line segment corresponding to the arrangement direction of the heating elements 111, is a constant value (usually 90°) with respect to the transport direction of the ID card 10 during printing.

For example, when the characters "日" and "本" are formed on the ID card 10 as on-demand information as shown in FIG. 9(a), the vertical line segments of each character (corresponding to the up and down directions in the figure) form a certain angle with respect to the long side direction of the ID card 10, i.e., the direction in which the ID card 10 is transported when printed.

On the other hand, as shown in FIG. 9(b), if the above character, for example the character "日" (sun), is forged by attaching printed matter A with another character (for example, mountain) printed on it, the vertical line segment of that character may not be at the same angle as the vertical line segment of the other character ("本") due to misalignment when pasting. In this embodiment, this angle misalignment can be used to determine authenticity.

In this embodiment, when determining authenticity, as shown in FIG. 10(a), first, the ruled lines 11 formed on the ID card 10 are detected from the captured image. The ruled lines 11 may be either the ruled lines 11 in the long side direction of the ID card 10 or the ruled lines 11 in the short side direction of the ID card 10, but in this example, the ruled lines 11 in the long side direction of the ID card 10 are detected. Also, it is not necessary to detect all the ruled lines 11, and it is sufficient to detect only some of the ruled lines 11.

Next, as shown in FIG. 10(b), multiple characters 20 (e.g., about 10 characters 20) of the on-demand information to be used for authenticity determination are extracted from the captured image. In the authenticity determination process of this embodiment, it is preferable to use characters with consecutive vertical bars such as "日" (day), "本" (book), and "１" (number one). Therefore, when extracting the characters 20, for example, OCR (optical character recognition) processing is performed on the on-demand information area of the ID card 10 to detect the predetermined characters 20 suitable for authenticity determination as described above, but this is not limited to this.

Then, as shown in FIG. 11(a), the ruled line 11 detected above is used as a reference line, and the angle α of the vertical line segment 21 with respect to the direction of the reference line is calculated for each character 20. Note that if one character 20 includes multiple vertical line segments 21, the angles α of the multiple line segments 21 may be averaged to determine the angle α for that character 20, or the angle α of any one of the line segments 21 may be used as the angle α for that character 20.

If the value of the angle α of the multiple characters 20 falls within a certain range, the authenticity determination device 3 determines that the ID card 10 is authentic (S5; YES) and completes the authenticity determination process. In this embodiment, the above authenticity determination is performed as identity verification when opening an account at a financial institution on the Internet, and after the authenticity determination process, the authenticity determination device 3 obtains user information (such as name 12 and date of birth 13) on the face of the ID card 10 from a photographed image of the ID card 10 as application information required to open an account, registers it (S6), and stores the user information in the memory unit 52.

On the other hand, if the value of the angle α of the multiple characters 20 does not fall within a certain range, the authenticity determination device 3 determines that the ID card 10 is not genuine, i.e., that the ID card 10 may be a fake one in which the characters 20 of the on-demand information have been forged.

For example, if the printed matter A is attached to the ID card 10 at an angle as shown in FIG. 11(b), the angle α of the character 20 "山" on the printed matter A will be significantly different from the angle α of the other characters 20, and the ID card 10 will be deemed to be not genuine. Note that the above-mentioned certain range can be, for example, a range of a certain value around the average or median value of the angle α of the multiple characters 20 as shown in FIG. 11(c), but is not limited to this.

When the authenticity determination device 3 determines that the ID card 10 is not authentic (S5; NO), it displays a warning on the display unit 33 to the effect that the ID card 10 may be a fake (S7). The display unit 33 displays a character 20 whose angle α is not within the above-mentioned certain range (for example, "山" in the example of FIG. 11(c)), and can prompt the person in charge to check it.

The person in charge can decide whether to accept the application by looking at the characters 20 etc. displayed on the display unit 33 and checking the characters 20 in the captured image of the ID card 10. If necessary, the person in charge can also make an inquiry to the user who sent the captured image etc.

If the person in charge decides not to accept the application, he/she will contact the user by, for example, sending a message from the authenticity determination device 3 to the user terminal 5 to that effect. If it is decided to accept the application, the authenticity determination device 3 can register the user information on the face of the ID card 10, as in S6 above.

As described above, the authenticity determination device 3 of this embodiment uses a photographed image of the ID card 10 to determine the authenticity of the ID card 10 based on the angle α of the vertical line segment 21 of the multiple characters 20 of the on-demand information. The on-demand information of the ID card 10 is usually printed in one go using the thermal head 110, and in the case of a genuine ID card 10, the above angle α is assumed to be a constant value derived from the configuration of the heating element 111 of the thermal head 110. On the other hand, when a printed matter A on which a false name or the like is printed is attached to the ID card 10, a shift in angle α may occur in the characters 20 of the printed matter A due to a shift at the time of attachment. Therefore, in this embodiment, it is possible to determine the authenticity of the ID card 10 based on the above angle α, and even if a forgery is performed by attaching a thin printed matter A on which a false name or the like is printed to the ID card 10, the forgery can be suitably detected.

More specifically, in the authenticity determination of this embodiment, the angle α of the line segment 21 with respect to the direction of the reference line is calculated for multiple characters 20, and if this angle falls within a certain range, the ID card 10 is determined to be authentic, and if not, it is determined to be inauthentic. The ruled line 11 formed on the ID card 10 can be used as the reference line, and this can be detected from the ID card 10 and used to calculate the angle α. However, the direction of the reference line can also be the horizontal or vertical direction of the photographed image of the ID card 10.

In addition, in this embodiment, the line segment 21 used for authenticity determination is a vertical line segment. This is because, in the case of a flat rectangular ID card 10, the vertical direction generally corresponds to the arrangement direction of the heating elements 111 of the thermal head 110, and this improves the accuracy of authenticity determination.

In contrast, the line segment 21 used for authenticity determination can also be a line segment in the long side direction of the ID card 10. That is, this direction corresponds to the transport direction of the ID card 10 during printing, and when the ID card 10 is transported in a straight line in the thermal transfer printer 100, the angle α of the line segment 21 in the long side direction of the ID card 10 is a constant value for the multiple characters 20 of the on-demand information. However, taking into consideration the possibility of the ID card 10 meandering during transport, it is preferable in terms of accuracy for the line segment 21 used for authenticity determination to be a vertical line segment.

In addition, the authenticity determination device 3 of this embodiment performs authenticity determination using a photographed image of the ID card 10 sent from the user terminal 5, so that an authenticity determination system 1 consisting of the authenticity determination device 3 and the user terminal 5 can be constructed using a network.

However, the present invention is not limited to the above-described embodiment. For example, in this embodiment, authenticity determination is performed as identity verification when opening an account, but the application scenario or purpose of the authenticity determination in this embodiment is not particularly limited.

In this embodiment, authenticity is determined using a captured image sent from the user terminal 5, but even if the ID card 10 of a user who visits a store, etc. is read by a scanner, authenticity can also be determined from the image.

In this embodiment, the characters 20 of the on-demand information printed using the thermal head 110 are used to determine authenticity, but the method of printing the on-demand information is not particularly limited to an inkjet method, as long as the angle α of the vertical line segment 21 and the line segment 21 in the long side direction of the ID card 10 is a constant value derived from the printing mechanism. However, it is common to use the thermal head 110 when printing on-demand information on the ID card 10, and the angle α of the vertical line segment 21 and the line segment 21 in the long side direction of the ID card 10 is a constant value derived from the arrangement direction of the heating elements 111 of the thermal head 110 and the transport direction of the ID card 10 during printing, making it possible to perform accurate authenticity determination.

In this embodiment, authenticity is determined based on whether the angle α of the multiple characters 20 falls within a certain range. However, authenticity may also be determined based on the difference between the maximum and minimum values of the angle α of the multiple characters 20. For example, if the difference is equal to or greater than a predetermined value, the ID card 10 can be determined to be not authentic.

The above describes preferred embodiments of the present invention with reference to the attached drawings, but the present invention is not limited to these examples. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally fall within the technical scope of the present invention.

1: Authenticity determination system 3: Authenticity determination device 5: User terminal 10: ID card 20: Character 21: Line segment 100: Thermal transfer printer 110: Thermal head 111: Heating element 301: Receiving means 302: Authenticity determination means 303: Display means

Claims (7)

A device for determining the authenticity of an identification card,
An authenticity determination device characterized by having an authenticity determination means that uses an image of the identification card to determine the authenticity of the identification card based on the angle of line segments in a specified direction of multiple characters of on-demand information formed on the identification card relative to the direction of a reference line in the image. The authenticity determination device according to claim 1, characterized in that the authenticity determination means determines the angle of the line segment with respect to the direction of a reference line for multiple characters of the on-demand information, and determines that the identification card is not authentic if the angle of the multiple characters does not fall within a certain range. 3. The authenticity determining device according to claim 1 , wherein the reference line is a ruled line formed on the identification card. The authenticity determination device according to any one of claims 1 to 3, characterized in that the characters are characters printed using a thermal head. The identification card is a flat rectangular card,
5. The authenticity determining device according to claim 4, wherein the predetermined direction corresponds to a direction of a short side of the card. The authenticity determination device according to any one of claims 1 to 5, characterized in that the authenticity determination device has a receiving means for receiving an image of the identification card from a user terminal. Computer,
A device for determining the authenticity of an identification card,
A program for functioning as an authenticity determination device having an authenticity determination means for determining the authenticity of the identification card using an image of the identification card based on the angle of line segments in a specified direction of multiple characters of on-demand information formed on the identification card relative to the direction of a reference line in the image.

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