JPH10177649A - Fingerprint collating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a first registered fingerprint usable even when an optical system is changed by correcting fingerprint data to be really read with the value of read distortion of standard fingerprint. SOLUTION: When the number of correction mode is inputted by a ten key 3, the setting of correction mode is displayed on a display device 4, and the display of collation mode is turned off. By reading the standard fingerprint in such a state, the coordinates of grid dots of standard fingerprint already stored in a RAM 1c by the unchanged optical system are compared with the coordinates of grid dots read this time by the changed optical system, the deviation quantity of already stored standard fingerprint from regular values is found and that deviation quantity is stored in the RAM 1c. Namely, the error of optical system to read the fingerprint, in the other words, the difference between the former optical system and the new optical system is found. Afterwards, the position information of feature point data of respective registered fingerprints is corrected by the deviation quantity, and the feature point data of new corrected fingerprints are registered again in the RAM 1c together with their password numbers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint matching device used for an ID discriminating device.

[0002]

2. Description of the Related Art Conventionally, as a fingerprint collating device of this type, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-255639, the density of a fingerprint is converted into an electric signal, and the distribution of the density is identified based on the electric signal. At the same time, by obtaining a variance value of light and shade, and changing the lighting state of the light emitting means in accordance with the variance value, it is possible to appropriately adjust how the finger is applied to the fingerprint reader according to the lighting state so as to perform fingerprint collation. There is something.

[0003]

However, since the fingerprint collation device described above reads a fingerprint using an optical system, the fingerprint data registered first is changed when the optical system is changed due to an optical system failure of the same device. Or, when the main unit itself failed, it could not be used when replacing the main unit, and had to be re-registered, which required a lot of trouble.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems of the prior art, and reads a standard fingerprint.
It is an object of the present invention to obtain a fingerprint registration device which can use a fingerprint registered first even if an optical system changes by correcting fingerprint data which is truly read by the value of the lead distortion.

[0005]

SUMMARY OF THE INVENTION A fingerprint registration device according to the present invention is a fingerprint matching device that matches fingerprint data of a read fingerprint with registration data. Storage means for registering and storing fingerprint data of the standard fingerprint together with other registration data; and when the fingerprint reader has changed, fingerprint data obtained by reading the standard fingerprint and registration data of the standard fingerprint registered in the storage means. Control means for changing the registered data registered in the storage means in accordance with the predetermined difference and re-registering the changed fingerprint data as registered data. It is characterized by the following.

According to another aspect of the present invention, there is provided a fingerprint matching device for identifying an ID by comparing fingerprint data of a read fingerprint with registered data.
A storage unit for registering and storing fingerprint data read using a fingerprint reader; and, when the read standard fingerprint is distorted during fingerprint registration, the fingerprint data after correcting the distortion amount is used as the normal data. In addition to the registration in the storage means, when the read standard fingerprint is distorted at the time of fingerprint collation, the distortion amount is corrected each time fingerprint collation is performed, and then the collation operation is performed with the registered fingerprint data. And control means for controlling.

Further, the control means performs fingerprint collation using the fingerprint pattern itself or fingerprint characteristic point data as the fingerprint data.

Further, the control means performs fingerprint collation using fingerprint data having a plurality of grid dots on two-dimensional coordinates as the standard fingerprint.

Further, the storage means is constituted by a permanent memory in the main body or an external memory.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a fingerprint registration device according to a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an external view of the fingerprint collation device. Fingerprint collation device 1
As shown in FIG. 1, a fingerprint reader 2 and
A numeric keypad 3 and a display device 4 made of liquid crystal are provided.

FIG. 2 is a diagram showing the internal configuration of the fingerprint collation apparatus 1. As shown in FIG. As shown in FIG. 2, the internal configuration of the fingerprint collation device 1 includes a CPU 1 a as control means connected to the fingerprint reader 2, the numeric keypad 3, and the display device 4 via a bus, a processing program, fixed data, and the like. It has a ROM 1b for storing, a RAM 1c for temporarily storing processing data and input data, etc., and an input / output interface 1d for opening and closing a door electric lock 5 (not shown) as a control target based on fingerprint collation. ing.

Here, the fingerprint collation device 1 uses (x _n (n = 1, 2) on a two-dimensional coordinate as a standard fingerprint as shown in FIG.
2,..., 9) and y ₁ , y ₂ ,..., Y ₆ ) fingerprints having a plurality of grid dots arranged at equal intervals are read by the fingerprint reader 2 and registered in the RAM 1 c. ing.

Next, the operation according to the above configuration will be described with reference to FIGS. 4 to 7 show flowcharts stored in the ROM 1b and executed based on the control of the CPU 1a. First, the operation at the time of fingerprint registration shown in FIG. 4 will be described. When the registration mode start number is input from the ten keys 3 (step S101), the display device 4 displays that the registration mode has been entered, and the display of the collation mode is turned off (step S102,
S103). When the registration mode ends, the display of the registration mode is erased and the display of the collation mode is displayed.

In this state, when a personal identification number is input (step S104), it is determined whether or not the personal identification number is a registered personal identification number (step S105). Is displayed as "Place your finger" (step S106),
Move to fingerprint lead. On the other hand, if the entered number is a registered password, the display device 4 displays "Please enter a different password" (step S107), and prompts that the number is incorrect. Step S
It returns to 104. In step S4,
If the personal identification number is not input, step S1 described later is performed.
Move to 11.

The process proceeds to fingerprint reading, and it is determined whether or not the fingerprint has been read within a predetermined time (step S108). If the fingerprint has been read, the characteristic point data of the fingerprint is calculated from the read data (step S109). ). If the data is not read within the predetermined time in step S108, the process returns to step S104.

After the above step S109, the inputted personal identification number and the calculated characteristic point data of the fingerprint are stored in the RAM 1c as the person's ID data (step S110). Thereafter, when the number indicating the end of the registration mode is input from the ten keys (step S11).
1) The display of the registration mode on the display device 4 is turned off, and the verification mode is displayed (steps S112 and S113).
If the registration mode end number is not input in step S111, the process returns to step S104 and the following operation is repeated.

Next, the operation at the time of ordinary traffic control shown in FIG. 5 will be described. First, when a password is input from the numeric keypad 3 and matches the number registered in the RAM 1c in advance (steps S201 and S20).
2) The display device 4 displays "Place your finger" and determines whether a fingerprint has been read within a predetermined time (steps S203 and S205), and the fingerprint has been read within a predetermined time. In this case, fingerprint feature point data is calculated from the read data (step S206). In step S202, if the input password does not match the registered password, the display device 4 displays an NG display of the password and displays the password in step S20.
1 (step S204). In step S205, if the fingerprint is not read within the predetermined time, the process returns to step S201.

After step S206, the person's characteristic point data corresponding to the personal identification number is read from the RAM 1c (step S207), and is calculated in step S206 within a predetermined range of the value of the characteristic point data read from the RAM 1c. It is determined whether or not the detected feature point data is included (step S208). When it is determined that the feature point data is included, an OK display for fingerprint collation is displayed on the display device 4 and the electric lock 5 is temporarily unlocked. As a result, a door (not shown) can be opened to pass through the door (step S).
210, S211).

In step S208, if it is determined that the calculated feature point data is not within the predetermined range of the read feature point data value, reading is performed until N times, and the display is performed each time. The message "Place your finger again" is displayed by the device 4, and the process from step S205 is repeated (steps S212 and S213). Even if the repetition is performed N times, in step S208, when it is determined that the calculated feature point data does not fall within the predetermined range of the value of the read feature point data, the display device 4 displays an NG display for fingerprint collation. Step S201
Repeat the following.

Next, the standard fingerprint registration operation shown in FIG. 6 will be described. First, when the number of the standard fingerprint registration mode is input from the ten keys 3 (step S301), the display device 4 displays that the standard fingerprint reading mode has been set, and the display of the collation mode is turned off (step S30).
2, S303). In this state, by reading the standard fingerprint shown in FIG. 3 (step S304), the RAM 1c
Then, the coordinates of each grid dot of the standard fingerprint are stored (step S305). Thereafter, the registration mode end number is input from the ten keys 3 (step S3).
06) The display of the standard fingerprint read mode is erased on the display device 4, and the display of the collation mode is displayed (step S).
307, S308), and ends.

Next, the operation of correcting a fingerprint when the optical system such as the fingerprint reader shown in FIG. 7 is changed will be described. First,
When the number of the correction mode is input from the ten keys 3 (step S401), the display device 4 displays that the correction mode has been entered, and the display of the collation mode is erased (steps S402 and S403). In this state, by reading the standard fingerprint shown in FIG. 3 (step S404),
The coordinates of the grid dots of the standard fingerprint already stored in the RAM 1c by the optical system before the change are compared with the coordinates of the grid dots read this time by the optical system after the change, and the normal value of the standard fingerprint already stored is compared. Is obtained and stored in the RAM 1c (step S405).
That is, the error of the optical system for reading the fingerprint, that is, the difference between the old optical system and the new optical system is measured.

Thereafter, the position information of the characteristic point data of each fingerprint which has been registered is corrected by the above-mentioned shift amount, and the corrected characteristic point data of the new fingerprint is stored in the R together with its password.
It re-registers with AM1c (step S406). That is, correction is performed to match the feature point data with a new optical system. After the correction is performed, the number of the correction mode end is input from the ten keys 3 (step S40).
7) The display of the correction mode is erased on the display device 4 and the display of the collation mode is displayed (steps S408 and S408).
409), and the process ends.

Therefore, according to the first embodiment,
When the fingerprint reader changes, the fingerprint data obtained by reading the standard fingerprint is compared with the registered data of the standard fingerprint registered in the RAM, and if there is a predetermined comparison difference, the data is registered in the RAM according to the difference. Since the registered data is changed and the fingerprint data after the change is re-registered as registered data, when the optical system changes, the registered data is corrected so that the fingerprint registered first can be used. be able to.

The present invention can be implemented in accordance with an embodiment described later, in addition to the above-described first embodiment. Embodiment 2 FIG. In the first embodiment, at the time of the fingerprint correction operation, the already registered standard fingerprint is compared with the grid dot of the newly read standard fingerprint. However, the grid pattern of the already registered standard fingerprint is compared. The shift amount of the dot from the normal value may be stored, the shift amount of the new grid dot from the normal value may be obtained, and correction may be performed using the shift amount from each of the normal values.

Embodiment 3 The registered fingerprint data itself is stored as a normal value corrected by lattice dots, and at the time of verification, the lead fingerprint is corrected by lattice dots to obtain a normal value.
You may make it collate. This makes it easy to respond to changes in the optical system. That is, when the read standard fingerprint is distorted and read at the time of fingerprint registration by the control means (CPU), the fingerprint data after correcting the distortion amount is registered in the RAM as regular data, and the fingerprint data is registered at the time of fingerprint collation. When the read standard fingerprint is distorted and read, the distortion amount may be corrected each time fingerprint matching is performed, and then control may be performed to perform a matching operation with registered fingerprint data. Can easily be changed, and the registered fingerprint can always be correct data.

Embodiment 4 The fingerprint data stored in the RAM may be any stage data such as a fingerprint pattern itself (when fingerprint pattern matching is performed), feature point data, or intermediate data between them.

Embodiment 5 FIG. If the registered data in RAM is lost, it will be necessary to re-register it.
Permanent memory (E2PROM, RA with battery)
(M, magnetic tape, IC memory card) or a floppy disk or a memory card as an external memory.

Embodiment 6 FIG. The standard fingerprint may be anything other than the grid, as long as it can calculate the coordinate shift.

Embodiment 7 The fingerprint data may be stored in the IC card using an IC card.

Embodiment 8 ATM of bank other than electric lock
It can be used for any purpose such as / CD and computer input permission.

Embodiment 9 The same can be done by using a card instead of a numeric keypad.

[0032]

As described above, according to the fingerprint registration apparatus according to the present invention, in the fingerprint matching apparatus which matches the fingerprint data of the read fingerprint with the registration data, the same fingerprint reader as that used at the time of fingerprint registration is used. Storage means for registering and storing the fingerprint data of the standard fingerprint read along with other registration data; and when the fingerprint reader has changed, fingerprint data obtained by reading the standard fingerprint and the standard fingerprint registered in the storage means. Control means for comparing the registered data with the registered data, and when there is a predetermined comparison difference, changing the registered data registered in the storage means according to the difference and re-registering the changed fingerprint data as the registered data; When the optical system changes, the registered fingerprint can be used by correcting the registration data when the optical system changes, and the optical system or the main body itself can be used Not become unusable when replacing a malfunction, there is no need to re-register the standard fingerprint even then.

According to the fingerprint registration apparatus of the present invention, when the read standard fingerprint is distorted during fingerprint registration, the fingerprint data after correcting the amount of distortion is stored as normal data. In addition to registration with the means, when the read standard fingerprint is distorted at the time of fingerprint collation, the distortion amount is corrected each time the fingerprint collation is performed, and then the collation operation is performed with the registered fingerprint data. Since it is provided with a control means for performing the operation, it is possible to easily cope with a change in the optical system, and the registered fingerprint can always be correct data.

Further, since the control means performs the fingerprint collation using the fingerprint pattern itself or the characteristic point data of the fingerprint as the fingerprint data, the fingerprint collation can be surely performed.

Further, since the control means performs fingerprint collation using the fingerprint data having a plurality of grid dots on two-dimensional coordinates as the standard fingerprint, it is possible to easily obtain a coordinate shift. The registration, correction, and collation of the standard fingerprint can be easily performed using the coordinate data of the grid dots.

Further, by using a permanent memory or an external memory in the main body as the storage means, it is possible to prevent the registered data from being lost.

[Brief description of the drawings]

FIG. 1 is an external view of a fingerprint registration device according to the present invention.

FIG. 2 is an external view of the fingerprint registration device shown in FIG.

FIG. 3 is an explanatory diagram of a plurality of grid dots included in a standard fingerprint used in the present invention.

FIG. 4 is a flowchart showing an operation at the time of fingerprint registration stored in a ROM 1b and executed under the control of a CPU 1a.

FIG. 5 is a flowchart showing an operation stored in a ROM 1b and executed based on the control of a CPU 1a.

FIG. 6 is a flowchart showing a standard fingerprint registration operation stored in the ROM 1b and executed under the control of the CPU 1a.

FIG. 7 is a flowchart showing a fingerprint correction operation when changing an optical system such as a fingerprint reader, which is stored in a ROM 1b and executed under the control of a CPU 1a.

[Explanation of symbols]

1 Fingerprint verification device, 2 Fingerprint reader, 3 numeric keypad, 4
Display device, 5 electric lock, 1a CPU, 1b RO
M, 1c RAM.

Claims (5)

[Claims] 1. A fingerprint collation device for collating fingerprint data of a read fingerprint with registration data, wherein the fingerprint data of a standard fingerprint read using the same fingerprint reader as at the time of fingerprint registration is registered and stored together with other registration data. When the fingerprint reader changes, the fingerprint data obtained by reading the standard fingerprint is compared with the registered data of the standard fingerprint registered in the storage means, and when there is a predetermined comparison difference, Control means for changing the registration data registered in the storage means according to the difference and re-registering the changed fingerprint data as registration data. 2. A fingerprint matching device wherein a fingerprint data of a read fingerprint is identified by comparing fingerprint data of the read fingerprint with registration data, a storage means for registering and storing the fingerprint data read using a fingerprint reader, When the read standard fingerprint is distorted and read, the fingerprint data after correcting the distortion amount is registered as the regular data in the storage means, and at the time of fingerprint collation, the read standard fingerprint is distorted and read. And a control unit for controlling the collation operation with registered fingerprint data after correcting the amount of distortion each time fingerprint collation is performed. 3. The fingerprint matching device according to claim 1, wherein said control means performs fingerprint matching using the fingerprint pattern itself or feature point data of the fingerprint as said fingerprint data. . 4. The fingerprint matching device according to claim 1, wherein the control unit performs the fingerprint matching using fingerprint data having a plurality of grid dots on two-dimensional coordinates as the standard fingerprint. A fingerprint matching device characterized by the above-mentioned. 5. The fingerprint matching device according to claim 1, wherein said storage means comprises a permanent memory in a main body or an external memory.