JPH07120417B2 - Fingerprint matching device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fingerprint collation device, and more particularly, to a fingerprint collation device having a function of enabling an input person to select a fingerprint to be compared and collated for collation confirmation of his / her identity. The present invention also relates to a fingerprint collation device having a reconfirmation function capable of further collating confirmation of the identity of the second finger when the fingerprint collation of the first finger does not match a predetermined number of times.

[Prior art]

At present, many fingerprint collation devices have been proposed and put into practical use, which use the fingerprint input for collation to confirm the person himself / herself. Even if the same person's finger is the same, the fingerprint pattern may be regarded as inconsistent due to finger pressure at the time of input, finger oil, dirt, position, etc. Or by adjusting the contrast of the input fingerprint data. However, if the finger of the registered fingerprint is scratched by, for example, a blade, or the temperature or other environmental conditions are different from those at the time of registration, the fingerprints are not judged to be the same fingerprint, and thus it is difficult to verify the identity of the person. The fingerprint input device needs to clearly reproduce the ridges and valleys of the input fingerprint,
Although it is clearly reproduced, it has a conflicting contradiction that it cannot be identified with a scratch or the like as described above. Further, even if the same person has the same fingerprint, it depends on which finger, and it is possible to discriminate whether or not the same person also by the second finger. Therefore, in order to solve the above-mentioned conventional drawbacks, a fingerprint collation device with a high degree of freedom is required so that the input person can select which finger is used for fingerprint collation according to his or her will. In addition, to allow the user to select various fingers for verification by himself, a secret code having a function of a personal identification number corresponding to each finger (that is, which finger is which code, which correspondence is clear) However, it is possible to improve the accuracy in terms of security as compared with the conventional fingerprint collation device, and there is a demand for such a fingerprint collation device having a high degree of freedom in practical use and a high degree of security. Furthermore, the second finger is automatically selected when the first finger does not match (the first collation fingerprint) due to the above-mentioned environmental conditions or the state of the finger, and thus wasteful time is not required and the operation is simple. There is also a need for a fingerprint matching device.

[Problems to be solved]

The present invention eliminates the above-mentioned drawbacks and satisfies the requirements, that is, a fingerprint collation device having a high degree of freedom in function and high security accuracy that a fingerprint to be collated can be selected by one's own will. Is provided. Further, the present invention provides a fingerprint collation device capable of collating the person himself / herself by using the fingerprints of other fingers when the collation by the first finger is accidentally impossible when collating the person or not. is there.

[Means for solving problems]

According to the present invention, in order to solve the above-mentioned problems, an acceptor input means for inputting data indicating a confirmed acceptor condition, and whether the acceptor condition is satisfied according to the input from the acceptor input means. Acceptor confirmation means for determining whether or not, fingerprint input means for inputting a fingerprint, fingerprint data storage means for storing a plurality of fingerprint data in advance, and a predetermined selection code corresponding to a desired finger used for fingerprint collation A fingerprint selection code input means for inputting a fingerprint, a fingerprint data selection means for selecting fingerprint data corresponding to the selection code designated by the fingerprint selection code input means from the fingerprint data storage means, and the acceptor confirmation means. When it is determined by the fingerprint data selecting means that the acceptor condition is satisfied, the fingerprint data selecting means selects the actual finger print data from the fingerprint input means and the fingerprint data storing means. Is configured by including a matching means for comparing collated with the fingerprint data, the fingerprint verification device is provided for comparison and verification by the desired finger.

[Action]

According to the fingerprint collation device having the above-described configuration, the tolerator is confirmed, and the confirmed tolerator inputs the predetermined code corresponding to the fingerprint data by himself or herself to confirm the fingerprint, for example. , You can choose the thumb or middle finger, and you can do fingerprint matching without using a finger damaged by scratches. It is not necessary to install a special means for ignoring inconveniences and scratches, and it is possible to perform fingerprint matching that is highly convenient and economical. Hereinafter, a detailed description will be given based on examples.

〔Example〕

The fingerprint collating apparatus of the present invention is particularly used for collating the person himself / herself with a finger, and is mainly used for entrance / exit management of a safety management system. Embodiments will be described below with reference to the drawings. The fingerprint collation device according to the present invention has the following configuration. The IC card 1 is provided with a password memory 1a and a fingerprint storage memory 1b for pre-storing a password indicating the identity of a collator as an acceptor condition and a plurality of fingerprint data as a fingerprint data storage device. The fingerprint data is roughly classified into two types. One is the fingerprint image itself,
The other is related to the feature points (ridge end points and branch points) in the fingerprint. The information on the feature points further includes the coordinates of the feature points, the line segment direction of the feature points, the number of ridges between the two feature points, and the positional relationship between the feature points. The fingerprint data used in this device uses the positional relationship between the feature points among those relating to the feature points, and is characterized by being described by the shortest tree having the feature points as nodes. The card reader 2 includes a micro SW that is turned on when the IC card 1 is inserted in a predetermined position, and a reading circuit 2a that reads fingerprint data of the IC card. The ten-key pad 3 is a selection device used as an acceptor input device for inputting a password and for selecting a fingerprint for fingerprint collation. The display device 4 is provided to display the collation result, and may be a screen display type such as LCD, CRT or the like, or may be a voice display type. The fingerprint input device 5 includes, for example, a finger rest made of a glass plate on which a finger is placed, a semiconductor laser for irradiating a fingerprint, and a beam extension for expanding the laser to a range required for fingerprint reading. A panda, a sensor unit 5a including a hologram and an optical lens that propagates through the glass plate and takes out a fingerprint as an image, a CCD image sensor that stores the image, and a fingerprint image stored in the sensor unit 5a. It is composed of an A / D converter 5b for converting into a digital signal. The controller 6 has a microprocessor-type basic configuration including a CPU and a peripheral circuit 8, a ROM and a RAM for accumulating programs for realizing the functions of the fingerprint collation device, and the card reader 2 and numeric keypad through an interface. 3, display device 4, fingerprint input device 5
Is electrically connected to each device.

Here, the configuration of the CPU 6 and the peripheral circuit 8 of the controller 6 will be described in more detail with reference to FIG. The controller 6 is connected to the card reader 2, and the card reader 2 reads the password on the IC card 1 from the password memory 1 a and inputs the read password to the controller 6 via the input / output unit 7.

Therefore, in the controller 6, a password receiving circuit 11 for receiving the password as an acceptor confirmation means, and a password comparing circuit for comparing the password keyed in with the ten-key pad 3 with the password received by the password receiving circuit 11. 12. A first AND gate that generates an output signal when both passwords match in the password comparison circuit 12 and there is a signal input from the card reader 2 indicating that the IC card 1 is inserted in a predetermined position Composed of 13. The fingerprint data selection means receives the fingerprint selection code when the fingerprint selection code corresponding to the desired collation fingerprint is keyed in on the ten-key pad 3, and compares the code with the actual finger in advance. A fingerprint selecting circuit 15 for selecting which fingerprint is stored by reading from the memory 14 configured by RAM, and a fingerprint address for designating an address in the IC card 1 in which the fingerprint data selected by the fingerprint selecting circuit 15 is stored. Designated circuit
From 16 the address latch circuit 17 for fixing the designated address, the reading drive circuit 18 for reading the fingerprint data in the IC card 1 according to the address from the address latch circuit 17, and the real finger image data from the fingerprint input device 5 are read. An image data receiving circuit 26 for receiving and transferring this data to a memory 27 composed of a RAM, a feature point rendering process for reading the data of the real finger fingerprint image from the memory 27, recognizing the positions of the feature points and rendering the position data Circuit 28, collation circuit 19 for comparing and collating the fingerprint data created by the drawing data from the characteristic point drawing circuit 28 with the corresponding fingerprint data in the IC card 1 read by the card reader 2, and the matching by the matching circuit 19 The counter 20 for counting up by 1 when the results do not match, the total count value of the counter 20 is compared with a predetermined numerical value, and the total count value When it is lower, it outputs to the address latch circuit 17, and when it is equal to the counter value, it outputs to the second and third AND gates 22 and 23 described later. The second AND gate 22 which outputs when the collation does not match, and the second finger which designates the address of the second finger (predetermined) in response to the output of the second AND gate 22 as the second fingerprint data extracting means. An address designating circuit 24, a third AND gate 23 that outputs when the second finger also fails to collate a predetermined number of times, and a display drive circuit 25 for displaying the collation result.

Next, the operation of the fingerprint collation apparatus will be described based on the flowchart shown in FIG. First, when a person comes in front of a door (not shown) in the specific area, the person inserts the IC card 1 into the card reader 2. The insertion method may be either automatic or manual. When the IC card 1 is inserted to the specified position, the micro SW in the card reader 2 is turned on, and an on signal is sent to one input terminal of the first AND gate 13. Next, the password entered by the ten-key pad 3 is sent to the password comparison circuit 12, and the password in the IC card 1 read by the card reader 2 is sent to the password comparison circuit 12 via the password reception circuit 11. The password comparison circuit 12 compares and collates the two passwords and outputs no signal when they do not match, and an output signal is input to one input terminal of the first AND gate 13 only when they match. Therefore, the first AND gate 13 It turns on and drives the fingerprint address designating circuit 16. The entering person inputs a fingerprint selection code corresponding to a desired finger by using the ten keys 3. The code is input to the fingerprint selection circuit 15, the memory contents are compared with the memory 14, the finger selected by the person who entered the area is selected, and the selected finger code is sent to the fingerprint address designating circuit 16. To do. In another embodiment, the fingerprint selection circuit 15 and the memory 14 may be eliminated and the fingerprint selection code keyed in may be directly input to the fingerprint address designating circuit 16. The fingerprint address designating circuit 16 selects the address of the IC card 1 in which the fingerprint corresponding to the selected finger is registered in advance, and sends it to the address latch circuit 17. The address latch circuit 17 latches the address and drives the reading drive circuit 18, reads out desired fingerprint data via the card reader 2, and sends the fingerprint data to the matching circuit 19. Next, the image data receiving circuit 26 receives the fingerprint pressed by the person who entered the area as the actual finger image data through the fingerprint input device 5, and the fingerprint of the actual finger is received through the feature point drawing processing circuit 28 through the memory 27. The characteristics of the data are drawn and the data is sent to the matching circuit 19. At that time, the inquiry circuit 19 compares the collated fingerprint data with the actual finger data,
If they match, the fact that they match is displayed on the display device 4 (FIG. 1) via the display drive circuit 25. Further, an unlocking signal is sent to an electric lock (not shown) so that the person who enters the area can enter the desired area. When they do not match, the counter 20 is counted up and the comparison circuit 21 compares the value with a predetermined value.
Now, when the counter value of the counter 20 is smaller, the address latch circuit 17 is driven, and the read drive circuit 18 is driven again at a fixed address to perform the collation comparison as described above. Further, the fingerprint data read from the IC card 1 may not be cleared in the collation circuit 19 and the collation comparison may be performed again directly without driving the reading drive circuit 18. The comparison circuit 21 outputs an output signal to both the second AND gate 22 and the third AND gate 23 when the counter value is equal to the predetermined numerical value. When the first finger (first finger) does not match the predetermined number of times, the second AND gate 22 is turned on to drive the second finger address designating circuit 24, and the address fixed in the address latch circuit 17 is changed to the first address. The address is rewritten and fixed to the address for two fingers, and the read drive circuit 18 is driven again to perform the same operation as described above. Although the second finger is predetermined in this embodiment, it may be associated with the data previously key-in by the ten keys 3.
That is, for example, when the entrance person desires the thumb of the right hand, the adjacent finger, that is, the index finger of the right hand is set as the second finger. When the second finger has already been collated, the third AND gate 23 outputs, and the display drive circuit 25 is driven to display the fact on the display device 4 (FIG. 1). At this time, an abnormal display may be made by an unillustrated device as an intruder. In the present embodiment, the password and fingerprint data are stored in the IC card 1, but they may be stored in the controller 6.
Alternatively, the password may be stored in the controller and the passwords in the IC card 1 may be compared to determine whether the person who entered the area is a person who has been admitted in advance. At this time, the password by the ten keys 3 is not required. Further, in the present embodiment, when the first finger is compared and collated, the desired finger is selected with the numeric keypad, but the first finger may be fixed in advance. Also, instead of the numeric keypad, switches corresponding to the fingers may be provided and used instead. In the present embodiment, an example using an IC card has been described, but this may be replaced with an optical card (laser card) that has been recently developed, and in short, any device that can accurately store a fingerprint or a password may be used. . Although the password input is repeated indefinitely when the passwords do not match, the IC card may be returned when the passwords do not match a predetermined number of times, or an abnormal signal may be sent to a remote place. Further, it goes without saying that in order to improve the security level, the coincidence signal may be transmitted only when a plurality of fingerprint collations match.

[Effects of the Invention] According to the present invention described based on the above-mentioned embodiments, the following effects of the invention can be obtained.

You can select the finger for matching by your own will, and it has a large degree of freedom and high security accuracy.

Even if it is not determined that the person is the same person with the first finger, an opportunity for fingerprint collation can be obtained with another finger.

As a result of the above effects, since a single fingerprint is not used for collation, fingerprints can be collated by another finger even if the finger has a scratch or the like.

An inexpensive fingerprint collation device can be provided because it does not require an advanced function for ignoring scratches for fingerprint collation.

[Brief description of drawings]

FIG. 1 is a schematic mechanism diagram showing a basic system configuration of a fingerprint collating apparatus according to the present invention, FIG. 2 is a block diagram showing a detailed configuration of a controller in the system, and FIG. FIG. 1 ... IC card, 2 ... Card reader, 3 ... Numeric keypad, 4 ... Display device, 5 ... Fingerprint input device, 6 ... Controller, 8 ... CPU and peripheral circuits, 11 ... Password receiving circuit , 12 …… Password comparison circuit, 14,27 …… Memory, 15 …… Fingerprint selection circuit, 16 …… Fingerprint address designating circuit, 25 …… Display drive circuit, 26 …… Image data receiving circuit, 28 …… Characteristic stippling Output processing circuit.

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP 54-78900 (JP, A) JP 60-221879 (JP, A) JP 61-148580 (JP, A) JP 58- 31478 (JP, A) JP 58-161083 (JP, A) Actually opened 61-128754 (JP, U) Actually opened 59-155646 (JP, U) Actually opened 62-195874 (JP, U)

Claims (2)

[Claims] 1. An acceptor input means for inputting data indicating a confirmed acceptor condition, and an acceptor confirmation means for judging whether or not the acceptor condition is satisfied according to an input from the acceptor input means. A fingerprint input means for inputting a fingerprint, a fingerprint data storage means for storing a plurality of fingerprint data in advance, and a fingerprint selection code input means for inputting a predetermined selection code corresponding to a desired finger used for fingerprint matching A fingerprint data selecting means for selecting fingerprint data corresponding to the selection code designated by the fingerprint selection code input means from the fingerprint data storing means; and the acceptor confirming means to determine that the acceptor condition is satisfied. Then, the actual finger print data from the fingerprint input means and the fingerprint data selected by the fingerprint data selection means from the fingerprint data storage means are compared and collated. That the matching means, is configured by including the fingerprint collation apparatus characterized by comparing matched by the desired finger. 2. The fingerprint collation apparatus according to claim 1, wherein the collation unit has a unit for counting the number of times of comparison and collation, and compares and collates the same data a plurality of times.