JPS61148580A - Individual collating method by fingerprint - Google Patents

Abstract

PURPOSE:To execute the fingerprint collation of high reliability by using not only fingerprint data but also a password code which only the person himself knows. CONSTITUTION:Every kind of pattern of fingerprint is encoded, and code numbers 1, 2, 3- are added preliminarily to patterns of fingerprint. A code number is recorded on a magnetic card to issue an ID Card, and this card is given to the person himself. These processings are controlled by a CPU 15 connected through a bus 14. An ID card terminal machine 16 is connected to the bus 14. In case of collation, the ID card is inserted to the ID card terminal machine 16. Further, his preliminarily registered finger is applied to a fingerprint detector and is picked up by a camera 11, and the code number obtained by classifying its pattern in a pattern classifying circuit 13 is collated with the code number recorded on the ID card to discriminate whether they coincide with each other or not.

Description

[Detailed Description of the Invention] [Industrial Application Field] In laboratories that require secrecy, anyone can freely enter the room by specifying in advance who is allowed to enter the room and checking whether the person is the specified person when entering the room. It is desirable to prevent people from entering the room. As a means of identification, personal information is recorded in advance on the magnetic stripe of a magnetic card, and by reading the magnetic card upon entering the room, it is determined whether or not the person is authorized to enter the room. However, with this method, if the magnetic card is lost and the finder misuses the magnetic card, anyone other than the person authorized to enter the room will be able to enter the room. Therefore, if parts of the human body such as fingerprints that easily reveal individual characteristics can be used, there is no risk of misuse, as is the case with methods that indirectly verify individuals using magnetic cards or the like.

The present invention relates to a method of determining whether or not a person is a pre-identified person by using a fingerprint, which is a part of the human body.

[Conventional technology]

FIG. 7 is a diagram showing a conventional personal verification system using fingerprints. When you press the pad of your fingertip 2 on prism 1,
Light incident from a light source 3 such as a fluorescent lamp is totally reflected at the grooves of the fingerprint due to the air layer, and diffusely reflected at the protruding stripes due to the absence of an air layer, and the fingerprint is imaged by the detector 4. This pattern is subjected to processing such as encoding by a processing device 5 such as a central processing unit (CPU), and is recorded and registered on a magnetic card 6 or recorded in a memory. From then on, when the same person puts their fingertip on a detection part such as a prism in the personal identification device, the fingerprint pattern is compared with the previously registered data, and if it matches, it is determined that the person is the person. Ru.

[Problem that the invention seeks to solve]

When comparing fingerprints in this way, it is extremely difficult to check whether the patterns of the fingerprints completely match. Therefore, as shown in Fig. 8, there is a pattern classification method that classifies the fingerprint patterns and determines that the person is the person if the pattern matches one of the patterns. However, although this method can perform a pattern search efficiently, it can only perform a comparison for each classification, so the reliability of the comparison is low. As shown in FIG. 9, there is also a method of extracting feature points such as end points 7, branch points 8, center points 9, and triangular IOs of a fingerprint and comparing them. Although this method has relatively high verification reliability, it has the disadvantage that the process of extracting feature points and matching is very complicated.

A technical object of the present invention is to solve such problems in the conventional personal identification method using fingerprints and to enable highly reliable fingerprint identification through simple processing.

[Means for solving problems]

The technical means of the present invention taken to solve this problem is to detect the fingerprint by placing the fingertip on the fingerprint detection unit, register it in the recording means, and use the recorded fingerprint data for personal verification. Compare with the fingerprint detected at the time and if it matches,
This is a personal verification method using fingerprints that determines that the person is the person.In addition to the fingerprint data, a password known only to the person is used, and when registering the fingerprint data, the password is also registered at the same time as the fingerprint. When performing verification, we use a method that determines the identity of the person only when both the fingerprint data and the PIN match.

[Effect]

According to this technical means, a fingerprint and a password are used together as verification data. The password can be of any value, such as a numerical value determined by each person or the order of operations.

Both this password and fingerprint data are registered on the magnetic card or computer memory. When verifying a person, a fingerprint is detected and compared, but at the same time, a password is also entered, and the password is checked to see if it matches. Only if the fingerprint and password match will the person be identified as the person.

〔Example〕

Next, how the personal verification method using fingerprints according to the present invention is actually implemented will be explained using examples. Figures 1 and 2 are diagrams showing a first embodiment of the personal verification method using fingerprints according to the present invention. Figure 1 shows the configuration of the personal verification system, and Figure 2 shows the types of fingerprints and code numbers. It is. Reference numeral 11 denotes a camera for detecting and taking an image of a fingerprint, which can also be composed of the prism 1 and detector 4 shown in FIG. The fingerprint pattern imaged by the camera 11 is stored in the frame memo 2, and is classified by the pattern classification circuit 13 to determine which of the pattern types shown in FIG. 2 it belongs to. Fingerprints are coded for each type of pattern, and code numbers such as 1, 2, 3, etc. are assigned in advance. Then, a code number is recorded on the magnetic card and an ID card is issued and given to the person in question. These processes are controlled by a central processing unit (CPU) 15 connected via a bus 14. A 10 card terminal machine 6 is connected to the bus 14.

When performing verification, 10 cards are transferred to 10 card terminals 16
Insert into. Furthermore, the finger registered in advance is placed on a fingerprint detector and an image is taken by the camera 11, and the pattern is classified by the pattern classification circuit 13, and the code number is checked to see if it matches the code number recorded on the 10 card. Ru. Note that two or more fingers may be compared.

According to this embodiment, since pattern classification is used, image processing by a computer can be simplified, and since the person is identified only when the type of pattern, that is, the code number, of each finger matches, it is possible to match the pattern between the fingers. reliability increases.

3 to 5 show a second embodiment of the present invention,
FIG. 3 shows a fingerprint registration system, and FIG. 4 shows a fingerprint verification system. In this embodiment, any two or more fingerprints out of ten fingers can be registered and verified. 17 is a fingerprint input device, which has basically the same configuration as in FIG. Inside the fingerprint input device 17, as shown in FIG.
. and 19... are placed at the fingertips of the ten fingers. Prism 18... is for left hand, prism 19...
is for the right hand. The CPU 20 includes this fingerprint input device 1.
7, a host computer 22 is also connected.

In this way, two or more fingerprints can be arbitrarily read and registered, but in this embodiment, the finger to be registered and the registration order are used as a password.

First, put both hands into the fingerprint input device 17, and input by applying them to the prisms 18, 19, etc. in the order of input.

For example, if you want to register the thumb of your left hand, the middle finger of your right hand, and the index finger of your right hand, you would place your left thumb on the prism 18a, then your right middle finger on the prism 19a, and finally your right index finger on the prism 19b. Enter your fingerprint. Then, the CPU 20 encodes the input fingerprint pattern. The encoding method is prism 18... and 1
9. A pattern obtained based on non-totally reflected light and total emitted light generated by contact and non-contact with the fingerprint is made into code information.

The fingerprint pattern is coded according to the order in which the fingerprints were pressed, and recorded on the magnetic stripe of the magnetic card 23 along with the registration order, and an ID card is issued.

To verify the identity of the person, first insert the magnetic card 23 into the card reading section of the fingerprint input device 17 shown in FIG. Then, in the exact same order as when inputting, prism 18...
Press your finger against 19... and enter the fingerprint pattern. Then, the fingerprints of the fingers applied to the prisms 18 and 19 are encoded in the same way as when registering fingerprints, and the code information and input order are the fingerprint code information recorded on the magnetic card 23. and the input order. If both match, it is determined that there are two people. Therefore, even if the person is the same person, if the person touches the prisms 18, 19, etc. in a different order than when they were registered during verification, it will be determined that the person is a different person.

In this way, in addition to fingerprints, the order in which the fingerprints are input is input as a password, and even when verifying whether the person is the person who is the person, the person is determined to be the person only if the person inputs the fingerprints in the same order as the password. Therefore, for fingerprint comparison, instead of looking for strict pattern matching, a simple matching method such as the pattern classification method explained in FIG. 2 can be adopted, and the processing system can be simplified. Note that the registration system shown in FIG. 3 and the verification system shown in FIG. 4 can be the same system.

FIG. 6 is a diagram showing a third embodiment of the present invention.

This embodiment is similar to the prism 18 in the second embodiment.
, 19..., an arbitrary number of prisms 24a
, 24b...24z are arranged at two regular intervals. As in the second embodiment, fingerprints are input by inputting desired fingers one by one, desired number of times, and in desired order, and each person memorizes the input order and input position. At this time, the difference from the second embodiment is that the prisms 24a, 24b, . . . , 24 in FIG.
The fingerprint of any finger can be input from the prism at any position in Z, and the input position of the finger is not fixed.

On the system side, as in the second embodiment, the input fingerprint is encoded and the prism 2 used for input is encoded.
The order and number of uses of 4a, 24b...24z are also coded. Then, the coded fingerprint pattern and the input order and number of prisms 24a, 24b...24z are as follows.
It is recorded on a magnetic card and 10 cards are issued.

When comparing fingerprints, use the prism 24a in the same order as when inputting.
, 24b...24z. Then, the pattern of each input fingerprint and the input prism 24a,
If both the order and the number of times 24b...24z match the recorded contents of the ID card, it is determined that the person is the real person.

In this embodiment, unlike the second embodiment, the place to place the finger is not specified, so the function of the password is further expanded.

In each of the above embodiments, the code number of the pattern or the password may be stored in the memory of the CPU instead of the ID card.

〔Effect of the invention〕

As described above, according to the present invention, in addition to checking the fingerprint pattern, a password is also used, and it is determined that the person is the person only when both the fingerprint and the password match, and the reliability of the verification is improved.

Therefore, for fingerprints, a simple verification method such as a pattern classification method can be used instead of a complete verification, making it possible to simplify the verification system without reducing the reliability of verification.

[Brief explanation of drawings]

1 to 6 show the fingerprint matching method according to the present invention, FIG. 1 is a block diagram showing the system configuration of the first embodiment, and FIG. 2 is a diagram showing the method for encoding fingerprint patterns. . 3 to 5 show the second embodiment, in which FIG. 3 shows a fingerprint registration system, FIG. 4 shows a fingerprint matching system, and FIG. 5 shows a fingerprint reading prism. FIG. 6 is a diagram showing a fingerprint reading prism in the third embodiment. Figure 7 is a diagram showing a conventional personal identification system using fingerprints, Figure 8 is a diagram showing a verification method using a conventional fingerprint pattern classification method, and Figure 9 is a diagram showing a fingerprint verification method using a conventional feature point extraction method. It is. In the figure, 11 is a camera, 13 is a pattern classification circuit,
16 is an IO card terminal, 17 is a fingerprint input device, 18.
...19... is a prism, 23 is a magnetic card, 24a
, 24b...24z are prisms. Patent applicant Fujitsu Ltd. agent Patent attorney Minoru Aoyagi 7 ?
J4 j t 7 1f0ris A

Claims (1)

[Claims] The fingerprint is detected by placing the fingertip on the fingerprint detection unit, and is registered in the recording means.The recorded fingerprint data is compared with the fingerprint detected during personal verification, and if it matches, the person is identified. This is a fingerprint-based personal verification method that uses a PIN known only to the person in addition to the fingerprint data, and registers the PIN at the same time as the fingerprint when registering the fingerprint data. is a fingerprint-based personal verification method in which the person is identified only when both the fingerprint data and the password match.