JP2009175995A - Collation device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a configuration allowing identification even when a pseudo fingerprint is used by collating a characteristic of a side face of a finger in addition to fingerprint collation. <P>SOLUTION: In this collation device 100, in addition to the fingerprint collation by a finger print collation means (a camera 1 for a fingerprint, a camera I/F 2 for the fingerprint, a fingerprint collation part 4, and a memory 5), a camera 7 for the finger side face photographs the finger side face, a finger side face collation part 9 collates a ratio of a height of a nail in a view from the side face of the finger in a photographic image to a height of the whole finger, and a ratio of a height of a nail in a view from the side face of the finger of a registered user stored in a memory B10 to a height of the whole finger, and the identification is performed by a result of the fingerprint collation and a collation result of the finger side face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a collation apparatus that performs collation using a finger feature as personal authentication.

  FIG. 6 is a configuration diagram showing a conventional fingerprint collation apparatus including the one disclosed in Patent Document 1, wherein 1 is a fingerprint camera for reading fingerprint data, 2 is a fingerprint camera I / F (interface), 3 is a fingerprint collation unit, 4 is a memory A in which fingerprint data of a registered user is registered in advance, and 5 is an LED (Light Emitting Diode) that displays a collation result from the fingerprint collation unit.

Next, the operation will be described.
In FIG. 6, fingerprint data of a person to be verified (hereinafter referred to as a user) is read from the fingerprint camera 1, and the fingerprint data registered in advance in the memory A4 by the fingerprint verification unit 3 via the fingerprint camera I / F2. And the collation result is displayed on the LED 5.
JP 2007-272470 A

  The conventional fingerprint collation device is configured as described above, and only the fingerprint data is read by the fingerprint camera 1, so that there is a problem that it is weak against a planar fingerprint (pseudo fingerprint) copied on paper or the like.

  One of the main objects of the present invention is to solve the above-described problems, and it is a main object of the present invention to realize a collation apparatus that uses other features related to fingers for collation in addition to fingerprint collation.

The verification device according to the present invention is:
A finger side surface feature data storage unit for storing finger side surface feature data indicating features on the finger side of the registered user;
A finger side image input unit for inputting a captured image of the finger side surface;
The finger side collation unit that analyzes the captured image input by the finger side image input unit, extracts the feature of the finger side represented in the captured image, and collates the extracted feature with the feature indicated by the finger side feature data It is characterized by having.

  According to the present invention, by performing user authentication by collation using the characteristics of the finger side surface, it is possible to eliminate impersonation collation using a flat fingerprint (pseudo-fingerprint) and to identify a person with high accuracy.

Embodiment 1 FIG.
In the present embodiment, a collation apparatus that uses the characteristics of the finger side surface for collation in addition to fingerprint collation will be described.
More specifically, a collation device that collates the ratio of the nail height when viewed from the finger side to the height of the entire finger will be described.

As shown in FIG. 1, a collation apparatus 100 according to the present embodiment is connected to a fingerprint camera 1 and a finger side camera 7.
The fingerprint camera 1 is the same as that shown in FIG.
The finger side camera 7 captures the side of the user's finger.
The positions of the fingerprint camera 1 and the finger side camera 7 are, for example, as shown in the schematic diagram of FIG.
In FIG. 2, 6 represents the user's finger.
As shown in FIG. 2, when the user puts the finger in the collation device, the fingerprint and the side of the finger are photographed at the same time, and the ratio of the fingerprint collation and the height of the nail viewed from the side of the finger and the height of the entire finger Matching will be performed at the same time.

In the internal configuration of the verification apparatus 100, reference numerals 2 to 5 are the same as those of the conventional apparatus shown in FIG.
Further, in the internal configuration of the collation apparatus 100, reference numeral 8 denotes a finger side camera I / F (interface) for taking captured image data from the finger side camera 7. The finger side camera I / F 8 is an example of a finger side image input unit.
9 analyzes the captured image data of the finger side surface input by the finger side camera I / F 8 to extract the feature of the finger side surface represented in the captured image data, and stores the extracted feature and the memory B10 described later. It is a finger side collation part which collates with the feature shown in the finger side feature data. In this Embodiment, the finger | toe side collation part 9 collates the ratio with respect to the height of the nail | claw seen from the side surface, and the whole finger | toe height.
Reference numeral 10 denotes a memory B that stores in advance finger side surface characteristic data indicating characteristics of the registered user's finger side surfaces. In the present embodiment, the memory B stores, as the finger side surface feature data, the ratio of the nail height viewed from the registered user's side surface to the height of the entire finger. The memory B is an example of a finger side surface feature data storage unit.
Reference numeral 11 denotes an AND circuit that AND-determines the collation result of the fingerprint collation unit 3 and the collation result of the finger side collation unit 9. The AND circuit 11 is an example of a combination verification unit.

The height of the nail when observed from the finger side surface means, for example, the height of a shown in FIG. 3, and is the height between the highest point c and the lowest point d of the nail.
Further, the height of the entire finger when observed from the side of the finger means, for example, the height of a + b shown in FIG. 3, and the lowest point e of the finger in the direction directly below the highest point c of the nail and the height of the nail It is the height between the highest point c.
The finger side collation unit 9 analyzes the captured image data of the finger side surface using an existing image analysis technique, extracts the finger side feature amount (the height of the nail and the height of the entire finger), and the nail viewed from the side surface. The ratio between the height of the finger and the height of the entire finger can be calculated.

In the collation apparatus 100 configured as described above, in addition to the conventional fingerprint collation operation, the finger side camera 7 reads the side of the user's finger, and the finger side camera I / F 8 inputs the image data of the finger side. Then, the captured image data of the finger side is passed to the finger side collation unit 9.
The finger side collation unit 9 calculates a ratio between the height of the nail viewed from the side and the height of the entire finger, and collates it with the ratio indicated in the finger side characteristic data registered in the memory B10.
At this time, the finger side collation unit 9 may calculate the area ratio with respect to the measurement range by extracting the luminance of the finger of the image, or binarize the image and perform the pattern ratio with reference to the histogram.
Further, when collating the finger side collation unit 9, the user ID (Identification Data) of the user to be collated is input to the collation device 100 by an input device (not shown in FIG. 1). The finger side surface feature data corresponding to the ID is searched from the finger side surface feature data stored in the memory B10 and collated.
Further, the finger side collation unit 9 outputs a signal indicating that the collation is successful if the calculated ratio and the ratio indicated in the finger side feature data are within a predetermined error range as a result of the collation, and collation is performed when the error range is exceeded. Outputs a signal indicating failure.

  Next, in the AND circuit 11, the collation result of the fingerprint collation unit 3 and the collation result of the finger side collation unit 9 are combined (ANDed), and if both are OK, the collation result is displayed on the LED 5.

  Since the collation device according to the present embodiment is configured as described above, in addition to the fingerprint collation operation, it is configured to collate the ratio between the nail height and the entire finger height at the same time. On the other hand, there is an effect that a high identification result can be obtained.

  As described above, in the present embodiment, fingerprint verification is performed with pre-registered fingerprint data, and the ratio between the height of the nail viewed from the side of the finger and the total height of the finger is determined from the side of the finger registered in advance. A collation device that compares and detects the ratio of the height of the finger to the ratio of the height of the entire finger has been described.

Embodiment 2. FIG.
In the present embodiment, an example will be described in which collation is used for features on the finger side surface other than the ratio of the nail height to the overall finger height.
The configuration example of the collation apparatus 100 according to the present embodiment is the same as that shown in FIG. 1, and the positions of the fingerprint camera 1 and the finger side camera 7 are also the same as those shown in FIG. It is.

In the collation device 100 according to the present embodiment, for example, the memory B stores in the memory B the distance between the nail-to-finger boundary and the base of the nail at the finger tip when observed from the finger side of the registered user. The finger side collation unit 9 analyzes the captured image data input by the finger side camera I / F 8 and stores the ratio with the height of the finger side feature data. The ratio between the distance between the boundary between the nail and the finger at the tip and the base of the nail and the height of the nail is calculated, and the calculated ratio is compared with the ratio indicated in the finger side surface feature data.
In addition, the height of the entire finger is used instead of the height of the nail, and the distance between the nail-to-finger boundary and the base of the nail at the finger tip when observed from the side of the finger and the height of the entire finger. The matching may be performed at a ratio of

The boundary portion between the fingernail and the finger at the tip of the finger is, for example, point f shown in FIG. Moreover, the base part of a nail | claw is g point shown in FIG. 4, for example.
Then, the finger side collation unit 9 calculates the ratio between the distance h between the points f and g in the captured image data and the nail height a shown in FIG. 3, and the corresponding ratio indicated in the finger side feature data. Is checked.
Further, the finger side collation unit 9 calculates the ratio between the distance h in the captured image data and the height a + b of the entire finger shown in FIG. 3, and collates it with the corresponding ratio indicated in the finger side characteristic data. Also good.

  In addition, instead of the ratio described in the first embodiment (the ratio between the height of the nail and the height of the entire finger), collation may be performed using the ratio described in the present embodiment, or the first embodiment. The ratio described in the above and the ratio described in this embodiment may be used in combination.

  As described above, the collation apparatus according to the present embodiment is also configured to collate the characteristics of the finger side surface simultaneously with the fingerprint collation operation, and therefore, there is an effect that a high identification result can be obtained for the pseudo fingerprint.

Finally, a hardware configuration example for realizing the collation apparatus 100 shown in the first and second embodiments will be described.
FIG. 5 is a diagram illustrating an example of hardware resources of the collation apparatus 100 illustrated in the first and second embodiments.
Note that the configuration of FIG. 5 is merely an example of the hardware configuration of the collation device 100, and the hardware configuration of the collation device 100 is not limited to the configuration illustrated in FIG. .

In FIG. 5, the collation apparatus 100 includes a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a processor) that executes a program.
The CPU 911 is connected to, for example, a ROM (Read Only Memory) 913, a RAM (Random Access Memory) 914, and a magnetic disk device 920 via the bus 912. Instead of the magnetic disk device 920, a storage device such as an optical disk device or a memory card (registered trademark) read / write device may be used.
The CPU 911 may be connected to a display device 901, a keyboard 902, a mouse 903, a communication board 915, an FDD 904 (Flexible Disk Drive), and a compact disk device 905 (CDD).
Further, the CPU 911 is connected to the fingerprint camera 1 and the finger side camera 7 via the fingerprint camera I / F 2 and the finger side camera I / F 8 described above.

The RAM 914, the ROM 913, the FDD 904, the CDD 905, and the magnetic disk device 920 are examples of storage devices.
The communication board 915, the keyboard 902, the mouse 903, the fingerprint camera 1, the finger side camera 7, and the like are examples of input devices.
The communication board 915, the display device 901, and the like are examples of output devices.

  The communication board 915 may be connected to a LAN (local area network), the Internet, a WAN (wide area network), or the like.

In the magnetic disk device 920, for example, an operating system 921 (OS), a window system 922, a program group 923, and a file group 924 are stored.
The programs in the program group 923 are executed by the CPU 911 using the operating system 921 and the window system 922.

The RAM 914 temporarily stores at least part of the operating system 921 program and application programs to be executed by the CPU 911.
The RAM 914 stores various data necessary for processing by the CPU 911.

The ROM 913 stores a BIOS (Basic Input Output System) program, and the magnetic disk device 920 stores a boot program.
When the verification device 100 is activated, the BIOS program in the ROM 913 and the boot program in the magnetic disk device 920 are executed, and the operating system 921 is activated by the BIOS program and the boot program.

  The program group 923 stores at least programs that execute the functions described as the “fingerprint collation unit” and “finger side collation unit” described in the first and second embodiments. The program is read and executed by the CPU 911.

The file group 924 stores at least fingerprint data for comparison and finger side surface feature data described in the first and second embodiments.
In addition, the results of the processing described as “judgment of”, “analysis of”, “calculation of”, “comparison of”, “extraction of”, “matching of”, etc. Information, data values, signal values, variable values, and parameters are also stored in the storage device shown in FIG. 5 or a register, cache memory, buffer memory, etc. (not shown).

  In the description of the first and second embodiments, the functions described as “fingerprint collation unit” and “finger side collation unit” may be “˜circuit”, “˜apparatus”, “˜apparatus”. Also, “to step”, “to procedure”, and “to processing” may be used. That is, the functions described as “fingerprint collation unit” and “finger side collation unit” may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented only by software, only hardware such as elements, devices, substrates, wirings, etc., or a combination of software and hardware, and further a combination of firmware. Firmware and software are stored as programs in a recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD. The program is read by the CPU 911 and executed by the CPU 911.

  As described above, the verification device 100 according to the first and second embodiments includes a CPU as a processing device, a memory as a storage device, a magnetic disk, a keyboard as an input device, a mouse, a communication board, and a display device as an output device and a communication board. As described above, the function indicated as “to part” is realized by using these processing device, storage device, input device, and output device.

FIG. 3 is a diagram illustrating a configuration example of a collation device according to the first and second embodiments. FIG. 6 is a diagram illustrating an example of positions of a fingerprint camera and a finger side camera according to Embodiments 1 and 2. The figure explaining the height of the nail | claw which concerns on Embodiment 1, and the height of the whole finger | toe. The figure explaining the boundary part of the finger | toe and nail | claw which concerns on Embodiment 2, and the base part of a nail | claw. FIG. 3 is a diagram illustrating a hardware configuration example of a collation device according to the first and second embodiments. The figure explaining a prior art.

Explanation of symbols

  1 Fingerprint camera, 2 Fingerprint camera I / F, 3 Fingerprint collation unit, 4 Memory A, 5 LED, 6 User's finger, 7 Finger side camera, 8 Finger side camera I / F, 9 Finger side collation unit 10 memory B, 11 AND circuit, 100 verification device.

Claims (5)

A finger side surface feature data storage unit for storing finger side surface feature data indicating features on the finger side of the registered user;
A finger side image input unit for inputting a captured image of the finger side surface;
The finger side collation unit that analyzes the captured image input by the finger side image input unit, extracts the feature of the finger side represented in the captured image, and collates the extracted feature with the feature indicated by the finger side feature data The collation apparatus characterized by having. The finger side surface feature data storage unit
Stores finger side surface feature data that characterizes the ratio between the height of the nail and the height of the entire finger when observed from the finger side surface,
The verification device is
The captured image input by the finger side image input unit is analyzed to calculate the ratio between the height of the nail on the finger side surface represented by the captured image and the height of the entire finger, and is shown in the calculated ratio and finger side surface feature data. The collating apparatus according to claim 1, wherein the collating apparatus collates the ratio. The finger side surface feature data storage unit
The ratio between the distance between the nail-to-finger boundary at the finger tip and the base of the nail when viewed from the side of the finger and the nail height, or the nail and finger at the finger tip when viewed from the finger side Finger side surface feature data that characterizes the ratio between the distance between the boundary portion and the base of the nail and the height of the entire finger,
The verification device is
Analyzing the captured image input by the finger side image input unit, and the distance between the nail-to-finger boundary portion at the finger tip and the base of the nail and the nail height on the finger side surface represented in the captured image Or the ratio between the distance between the nail-to-finger boundary at the finger tip and the base of the nail and the height of the entire finger when observed from the side of the finger. The collation apparatus according to claim 1, wherein collation is performed with a ratio indicated in the feature data. The verification device further includes:
A fingerprint verification unit that performs fingerprint verification based on the fingerprint data of the registered user and the captured image of the fingerprint;
The collation apparatus according to claim 1, further comprising a combination collation unit that performs collation by combining the collation result by the finger side collation unit and the collation result by the fingerprint collation unit. Finger side image input processing for inputting a captured image of the finger side surface;
A data search process for searching finger side feature data indicating features on the finger side of the registered user;
A finger side collation process for analyzing a captured image input by the finger side image input unit to extract a feature of the finger side represented in the captured image and collating the extracted feature with the feature indicated by the finger side feature data A program characterized by causing a computer to execute.

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