JP2001092960A - Fingerprint authentication method - Google Patents

Abstract

(57) [Problem] To provide a fingerprint authentication method in which a finger number and the number of fingers to be authenticated are registered in advance so that even if a finger is scratched, authentication can be performed and erroneous authentication is reduced. SOLUTION: A finger detection means 2 for detecting a finger number, a fingerprint reading means 3, a finger registration means 4 for registering a finger number and an index used for authentication, and a fingerprint data storage means for storing a plurality of fingerprint data in advance 5 and finger determination means 6 for determining whether the finger number and index from the finger detection means are the same as those registered.
A fingerprint matching means 7 for comparing and comparing the read fingerprint with stored fingerprint data; an authentication rate calculating means 8 for calculating an authentication rate from the matching result; Means 9, an authentication output means 10 for authenticating and outputting the person based on the determination results, and a control unit 14 for controlling the respective means. Now authenticates the identity of the person.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint authentication method, and more particularly to a fingerprint authentication method capable of changing the number of fingers to be authenticated.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a fingerprint reader 3 reads a fingerprint of a finger placed on a finger rest 1 as shown in FIG.
A fingerprint data storage unit 5 storing a plurality of fingerprint data in advance; and a fingerprint matching unit 7 for comparing and matching the fingerprint data from the fingerprint reading unit 3 with the fingerprint data stored in the fingerprint data storage unit 5. An authentication rate calculating means 8 for calculating an authentication rate from the result of the matching by the fingerprint matching means 7; a fingerprint determining means 9 for determining whether or not the fingerprint belongs to the user based on the authentication rate from the authentication rate calculating means 8; An authentication output unit 10 for authenticating and outputting the identity of the user based on the determination result of the fingerprint determination unit 9 and a control unit 14 for controlling each unit, and the read fingerprint is stored in the fingerprint data storage unit. When the fingerprint data matches the stored fingerprint data, the user is authenticated as an individual. However, according to this method, if the fingerprint registered in the fingerprint data storage means 5 cannot be read due to, for example, scratching the finger, authentication cannot be performed. When used in a simple system, there is a problem that the user cannot be confirmed and cannot be unlocked to enter the house. In view of the above, there has been proposed a device which is provided with means for selecting fingerprint data for fingerprint collation, and can collate a fingerprint with a desired finger. However, in this method, a person who is going to be authenticated can select fingerprint data for fingerprint collation. There is a problem that the probability of doing so increases.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and by registering a finger to be authenticated and the number of the finger in advance, it is possible to obtain authentication even if the finger is damaged. Another object of the present invention is to provide a fingerprint authentication method in which the number of false authentications is reduced.

[0004]

According to the present invention, there is provided a finger detecting means for detecting a finger number of a finger placed on a finger rest, a fingerprint reading means for reading a fingerprint of the finger, Finger registration means for registering a finger number and the number of fingers used for authentication, fingerprint data storage means for storing a plurality of fingerprint data in advance, and a finger number and the number of fingers from the finger detection means; Finger determination means for determining whether the finger number and the number of fingers stored in the finger registration means are the same, and comparing the fingerprint data from the fingerprint reading means with the fingerprint data stored in the fingerprint data storage means Fingerprint matching means for matching, authentication rate calculating means for calculating an authentication rate from the matching result of the fingerprint matching means, and fingerprint determination for determining whether or not the fingerprint belongs to the person based on the authentication rate from the authentication rate calculating means Means and said fingering Authentication means for authenticating and outputting the identity of the user based on the determination result of the means and the fingerprint determination means, and a control unit for controlling each of the means, and determines that the registered finger and the number of fingers are registered. Then, the fingerprint authentication method is such that the identity of the user is authenticated and output based on the fingerprint authentication rate of the registered finger.

[0005] Security level setting means for setting and storing a security level in advance, and a security table for storing a fingerprint authentication rate corresponding to the security level are provided. The fingerprint authentication method is such that it is determined whether or not the fingerprint belongs to an individual based on whether the rate exceeds an authentication rate corresponding to the security level set in the security level setting means.

The security table stores a fingerprint authentication rate and the number of fingers exceeding the authentication rate in correspondence with a security level, and the fingerprint determination means determines that the authentication rate from the authentication rate calculation means is correct. The fingerprint authentication method is such that it is determined from the authentication rate stored in the security table and the number of fingers exceeding the authentication rate whether the finger belongs to the user.

[0007]

As described above, in the fingerprint authentication method of the present invention, the finger detecting means for detecting the finger number of the finger placed on the finger rest, the fingerprint reading means for reading the fingerprint of the finger, Finger registration means for registering finger numbers and the number of fingers used in advance for authentication, fingerprint data storage means for storing a plurality of fingerprint data in advance, and finger numbers and the number of fingers from the finger detection means. Finger determination means for determining whether the finger number and the number of fingers stored in the finger registration means are the same, and fingerprint data from the fingerprint reading means and fingerprint data stored in the fingerprint data storage means. Fingerprint comparing means for comparing and collating, authentication rate computing means for computing an authentication rate from the collation result of the fingerprint collating means, and fingerprint for judging whether the fingerprint belongs to the person based on the authentication rate from the authentication rate computing means. Determining means; Since it is composed of an authentication output unit for authenticating and outputting the identity of the user based on the determination results of the determination unit and the fingerprint determination unit, and a control unit for controlling each of the units, the number of registered fingers and the number of fingers are provided. After the determination, the identity of the person can be authenticated by the authentication rate of the fingerprint of the registered finger.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fingerprint authentication method according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a main part showing an embodiment of a fingerprint authentication method according to the present invention, and FIG. 2 is an external view of the main part. In the figure, reference numeral 1 denotes a finger placement unit on which five or ten fingers can be placed as shown in FIG. 2 for reading a fingerprint. Reference numeral 2 denotes a finger detection means provided on the finger placement unit 1 for detecting a finger number (kind). The finger detection unit 2 is provided with a temperature sensor, an image sensor such as a CCD at the position of each finger of the finger placement unit 1, and the like. Whether a finger is placed at each position is detected, and a finger number is detected based on the position where the finger is placed. 3 is a C for reading the fingerprint of the finger placed on the finger placement unit 1
This is a fingerprint reading means constituted by a CD or the like. Reference numeral 4 denotes a finger registration unit that previously registers a finger number and the number of fingers used for authentication. Reference numeral 5 denotes a fingerprint data storage unit that stores a plurality of fingerprint data in advance. 6 is the finger detecting means 2
The finger determination unit determines whether the finger number and the number of fingers are the same as the finger number and the number of fingers stored in the finger registration unit 4. Reference numeral 7 denotes a fingerprint matching unit that compares and compares the fingerprint data from the fingerprint reading unit 3 with the fingerprint data stored in the fingerprint data storage unit. Reference numeral 8 denotes an authentication rate calculating means for calculating an authentication rate from the result of the comparison by the fingerprint matching means 7. Reference numeral 9 denotes a fingerprint determination unit that determines whether the fingerprint is the person's identity based on the authentication rate from the authentication rate calculation unit 8. Reference numeral 10 denotes an authentication output unit that authenticates the identity of the user based on the judgment results of the finger judgment unit 6 and the fingerprint judgment unit 9 and outputs the result. Reference numeral 11 denotes security level setting means for setting and storing a security level in advance. Reference numeral 12 denotes a security table for storing a fingerprint authentication rate corresponding to the security level. An operation unit 13 switches to a registration mode for registering data in the finger registration unit 4 and the fingerprint data storage unit 5 or an authentication mode for collating and authenticating a finger and a fingerprint, and inputting various data. . Reference numeral 14 denotes a control unit that controls each of the above units.

Next, the operation procedure and operation of the above configuration will be described. FIG. 3 is an operation flowchart showing a procedure for registering fingerprint data in the fingerprint data storage means in the fingerprint authentication method according to the present invention. Hereinafter, a procedure for registering fingerprint data will be described with reference to FIG. First, the following operation is performed by operating the operation unit 13 to enter the registration mode. The finger (1
５5) are placed (ST1), the number of placed fingers is checked (ST2), and which finger is placed is stored (ST3).
After that, whether to select a finger to be stored is input from the operation unit 13 (ST4), and when no finger is selected, the finger numbers of all the put fingers are registered in the finger registration means 4 (ST5), and the corresponding finger is selected. The fingerprint to be read is read by the fingerprint reading means 3 and stored in the fingerprint data storage means 5 (ST6). (ST4)
When a finger is selected, a finger number to be stored is input from the operation unit 13 (ST7), and the input finger number is input to the finger registration unit 4.
(ST8), the fingerprint corresponding to this finger is read by the fingerprint reading means 3, and stored in the fingerprint data storage means 5 (ST6).

FIG. 4 is an operation flowchart showing an authentication procedure in the fingerprint authentication method according to the present invention. Hereinafter, the authentication procedure will be described with reference to FIG. First, the following operation is performed by operating the operation unit 13 to set the authentication mode. The finger (1 to 5) of the person to be authenticated
When the finger is placed (ST11), it is checked whether the finger placed by the finger determination means 6 is the same as the finger number registered in the finger registration means 4 (ST12), and the placed finger is registered in the finger registration means 4. If it is different from the finger number, an error notification is output from the authentication output means 10 (ST13). In (ST12), if all the put fingers are the same as the registered finger number, the fingerprint of the finger is read by the fingerprint reading means 3, and the fingerprint matching means 7 checks the fingerprint with the fingerprint data in the fingerprint data storage means 5. Then, the authentication rate calculating means 8 calculates the authentication rate of each fingerprint (ST1).
4) Yes. Next, the fingerprint determination means 9 is
From the security level stored in the security level setting means 11 to the security table 1
2, the number of fingers determined to have a high authentication rate from the authentication rate calculation means 8 is counted as compared with the reference authentication rate stored in the storage area 2. The number of fingers is stored in the security table 12. (ST15).
In (ST15), if the number of fingers whose authentication rate is equal to or higher than the predetermined level exceeds the predetermined number, it is determined that the fingerprint belongs to the person, and an authentication notification is output from the authentication output means 10 (ST15).
16). Also, in (ST15), if the number of fingers whose authentication rate is equal to or higher than the predetermined level does not exceed the predetermined number, it is determined that the fingerprint is not for the person, and an error notification is output from the authentication output means 10.

FIG. 5 is a diagram showing an embodiment of data stored in the security table 12. As shown in FIG. As shown in the figure, in the case of the A level having a high security level, the authentication rate is set to be high, the number of fingers to be authenticated is also set to be large, and as the security level becomes low, the authentication rate becomes higher.
In addition, the number of fingers to be authenticated is reduced.
At the Z level with the lowest security level, the number of fingers to be authenticated may be set to 0 and authentication may be performed only by the judgment result of the finger judging means 6.

[0012]

As described above, according to the fingerprint authentication method of the present invention, the finger detecting means for detecting the finger number of the finger placed on the finger rest, the fingerprint reading means for reading the fingerprint of the finger,
Finger registration means for registering finger numbers and the number of fingers used in advance for authentication, fingerprint data storage means for storing a plurality of fingerprint data in advance, and finger numbers and the number of fingers from the finger detection means. Finger determination means for determining whether the finger number and the number of fingers stored in the finger registration means are the same,
Fingerprint collation means for comparing and collating the fingerprint data from the fingerprint reading means with the fingerprint data stored in the fingerprint data storage means, authentication rate computation means for computing an authentication rate from the collation result of the fingerprint collation means, A fingerprint determining means for determining whether the fingerprint is the identity of the user based on the authentication rate from the authentication rate calculating means; and authenticating and outputting the identity based on the determination results of the finger determining means and the fingerprint determining means. Since the authentication unit includes the authentication output unit and the control unit that controls each of the units, after determining that the number of registered fingers and the number of fingers are the same, the user is identified by the authentication rate of the fingerprint of the registered finger. Authentication can be performed, and more accurate authentication can be performed. Further, security level setting means for setting and storing a security level in advance, and a security table for storing a fingerprint authentication rate corresponding to the security level are provided, and the fingerprint determination means includes an authentication rate from the authentication rate calculation means. However, since it is determined whether the fingerprint belongs to the user by checking whether the authentication rate corresponding to the security level set in the security level setting means is exceeded, the fingerprint can be used in a wide range of fields. For example, when used for locks in safes that store important documents, etc., the highest security level can be used to strictly authenticate the user and prevent it from being easily broken. In this case, the number of fingers and the number thereof can be easily unlocked.

[Brief description of the drawings]

FIG. 1 is a main block diagram showing an embodiment of a fingerprint authentication method according to the present invention.

FIG. 2 is an external view of a main part showing one embodiment of a fingerprint authentication method according to the present invention.

FIG. 3 is an operation flowchart of a registration process showing one embodiment of the fingerprint authentication method according to the present invention;

FIG. 4 is an operation flowchart at the time of authentication showing one embodiment of the fingerprint authentication method according to the present invention.

FIG. 5 is a diagram showing one embodiment of data stored in a security table in the fingerprint authentication method according to the present invention.

FIG. 6 is a main block diagram showing a conventional fingerprint authentication method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Finger placement part 2 Finger detection means 3 Fingerprint reading means 4 Finger registration means 5 Fingerprint data storage means 6 Finger determination means 7 Fingerprint collation means 8 Authentication rate calculation means 9 Fingerprint determination means 10 Authentication output means 11 Security level setting means 12 Security table 13 Operation unit 14 Control unit

Claims (3)

[Claims] 1. A finger detecting means for detecting a finger number of a finger placed on a finger rest, a fingerprint reading means for reading a fingerprint of the finger, and a finger number and the number of fingers used for authentication are registered in advance. A finger registration unit, a fingerprint data storage unit that stores a plurality of fingerprint data in advance, a finger number and the number of fingers from the finger detection unit, and a finger number and the number of fingers stored in the finger registration unit. Finger determination means for determining whether they are the same, fingerprint matching means for comparing and matching fingerprint data from the fingerprint reading means with fingerprint data stored in the fingerprint data storage means, and An authentication rate calculating means for calculating an authentication rate; a fingerprint determining means for determining whether a fingerprint belongs to an individual based on the authentication rate from the authentication rate calculating means; and a determination result of the finger determining means and the fingerprint determining means. Based on himself Authentication output means for authenticating and outputting whether there is, and a control unit for controlling each means, after determining that the registered finger and the number of fingers, the authentication rate of the fingerprint of the registered finger A fingerprint authentication method characterized in that the user is authenticated and outputted. 2. A security level setting means for setting and storing a security level in advance, and a security table for storing a fingerprint authentication rate corresponding to the security level, wherein the fingerprint determination means is provided by the authentication rate calculation means. A fingerprint authentication method for determining whether or not a fingerprint belongs to a user by determining whether or not the authentication rate exceeds the authentication rate corresponding to the security level set in the security level setting means. 3. The security table stores a fingerprint authentication rate and the number of fingers exceeding the authentication rate in correspondence with a security level, wherein the fingerprint determination means performs authentication by the authentication rate calculation means. 3. The fingerprint authentication method according to claim 2, wherein the authentication rate is determined from the authentication rate stored in the security table and the number of fingers exceeding the authentication rate.