JPH0644284B2 - Fingerprint identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention identifies individuals (hereinafter referred to as ID).
The present invention mainly relates to an improvement of a fingerprint discriminating apparatus that discriminates the coincidence of fingerprints when the fingerprints are used.

[Prior Art] In many cases, a traffic control device that opens and closes a door by determining whether or not a passerby is passing is often installed at an entrance / exit of a specific area such as a calculation center, a financial institution, or a nuclear facility where special monitoring is required. .

In addition to the well-known ID card and number input means such as a numeric keypad, fingerprint collation has recently been used to determine whether the traffic is appropriate.
As a device for automatically performing this verification, there is, for example, the fingerprint discriminator of Company I, which was published in Weekly Gem (No. 24, No. 31 issued in August 1984).

This fingerprint discriminator discriminates whether or not the fingerprint of one finger matches the one registered in advance, and the discrimination accuracy was relatively high.

[Problems to be Solved by the Invention] In the conventional traffic control device using the fingerprint discriminator as described above, since the fingerprint discriminator is configured to discriminate one specific finger, In the case of injury, even a registered passerby cannot pass through.

On the other hand, Japanese Patent Application Laid-Open No. 53-73936 discloses a technique in which the left and right forefingers are sequentially selected and scanned and collated with a file.

However, the detection accuracy of the fingerprint identification device changes depending on installation conditions, seasons, conditions of the human body, etc., and even if the left and right forefingers are matched with the fingerprint pattern stored in the file with the same accuracy, they do not always match. There are times when you don't.

In such a case, there is no method other than dealing with it by lowering the detection accuracy of the fingerprint identification device. However, if the detection accuracy of the fingerprint identification device is lowered, an accurate person identification operation may not always be expected.

Therefore, the present invention has been made in order to solve such a problem, and even a detected person who injured a specific finger can discriminate the coincidence of fingerprints by any of the other fingers of the detected person. An object of the present invention is to provide a fingerprint discriminating apparatus that is less affected by the environment and the person to be detected.

[Means for Solving Problems] A fingerprint identification device according to the present invention relates to a fingerprint detection unit that detects fingerprints of a plurality of fingers of a subject and a plurality of fingers of the subject, A feature pattern storage unit that stores a feature pattern of a fingerprint registered in advance, and a feature pattern of the feature pattern storage unit and the fingerprint detected by the fingerprint detection unit are compared in the order of registration in the feature pattern storage unit. Then, when a match is detected between the match detection means for detecting the match and the feature pattern of the fingerprint registered in advance and one or more fingerprints of the subject's finger by the match detection means, It has a discrimination means for discriminating the same person as the person having the fingerprint of the characteristic pattern registered in advance.

[Operation] In the present invention, a fingerprint detection unit that detects fingerprints of a plurality of fingers of the subject, and a characteristic pattern storage unit that stores a characteristic pattern of a fingerprint registered in advance for the plurality of fingers of the subject. And a coincidence detecting means for comparing the characteristic pattern of the characteristic pattern storing means with the fingerprint detected by the fingerprint detecting means to detect a coincidence. When the fingerprints of at least one match are detected, it is determined that they are the same person, and the fingerprints of a plurality of fingers are also detected as a match of at least one finger even for a person having a problem in fingerprint identification. When they are given, they can be judged as the same person.

[Embodiment] An embodiment in which the present invention is provided at a doorway of a traffic control area will be described below with reference to the drawings.

FIG. 1 shows an overall circuit block diagram of an embodiment of the present invention.

In the figure, the fingerprint identifying apparatus according to the present embodiment detects a plurality of fingerprints of a finger of a passerby who enters and exits the passerby control area, and a detection determining means 1 for determining a match, and the passerby which is given in advance to the passerby. Number input means 2 for inputting a number to be specified when entering or leaving the control area, and a specific finger of the plurality of fingers of the passerby is selected based on the input result of the number input means 2,
And a finger selection means 3 for detecting the fingerprint of the selected finger by sending a selection signal to the detection determination means 1.

The detection determination means 1 includes a fingerprint reader 11 that reads a passerby's fingerprint as a video signal, and a feature pattern extraction device 12 that extracts a feature pattern from the video signal of the fingerprint read by the fingerprint reader 11 and digitizes it. , A characteristic pattern memory 13 for outputting a corresponding characteristic data pattern specified by the selection signal transmitted by the finger selecting means 3.
And a feature detector which compares the feature data pattern output from the feature pattern memory 13 with the digitized feature pattern output from the feature pattern extraction device 12 to determine a match, and the match detector. A fingerprint permission indicator 15 for displaying the approval or disapproval of the fingerprint to the detected person based on the discrimination result of 14, and the entrance / exit door (not shown) of the traffic control area is electrically activated based on the discrimination result of the coincidence detector 14. It is configured to send an unlocking command.

The number input means 2 reads the card number given in advance to the person to be detected who is a passerby, reads the next card number from the read card number, or inputs the reset signal of the finger selection means 3. It comprises a card reader 21 that latches until it is operated, and a re-operation indicator 22 that shows a passerby to re-operate the card reader 21 based on a reset signal from the finger selecting means 3.

The finger selecting means 3 sends out an address signal in the characteristic pattern memory 13 of the finger for which the detection / judging means 1 should first detect a fingerprint based on the result of reading the card number of the card reader 21. The second decoder 32, which sends the address signal in the finger feature pattern memory 13 to detect the fingerprint next to the first decoder 31, and the detection judgment based on the reading result of the card number of the card reader 21. Third, the means 1 sends a designation signal for specifying each of the five fingers (thumb, index finger, middle finger, ring finger, and little finger) whose fingerprints should be detected first and the five fingers whose fingerprints should be detected next. Or the fourth
Based on the outputs of the first OR circuit 351 and the first OR circuit 351 which takes the logical sum condition of the designation signals specifying the respective five fingers of the third decoder 33.
Second, third, and third second start pulses and a second second start pulse (which serves as a reset signal input to the number input means 2) are sequentially output.
Each one-shot multi-vibrator (hereinafter, OM ₁ ,
OM ₂ , OM ₃ ) 361, 362, 363 and the start pulse of the OM ₁ 361 and the first decoder 31.
Gate 371 for controlling ON / OFF of the address signal of
And a second gate 372 for ON / OFF controlling the address signal of the second decoder 32 based on the start pulse of the OM ₂ 362, and each signal output from the first and second gates 371 and 372. Then, the adder 38 which sends the selection signal to the characteristic pattern memory 13 of the detection judgment means 1
And second to sixth conditions that take the logical sum condition of the designation signals that specify the respective five fingers of the third and fourth gates 373 and 374.
Of the OR circuits 352 to 356 and the finger designation display unit 39 that displays the type of the finger selected based on the outputs of the second to sixth OR circuits 352 to 356.

Next, the operation of the fingerprint identification device according to this embodiment will be described.

First, a passer-by inserts a card into the card reader 21 of the number input means 2, the card number is read by the card reader 21, and the first decoder 31 uses the first finger previously specified from the card number. It outputs the address signal of a certain index finger. On the other hand, the card number of the card reader 21 is also input to the third decoder 33, and the designation signal for specifying each of the five fingers of the third decoder 33 is given by the first OR circuit 351.
Is input to the OM ₁ 361 via the OM ₁ 361, the activation signal of the OM ₁ 361 turns on the first and third gates 371 and 373, the address signal of the index finger is input to the adder 38, and the third signal is input to the OM ₁ 361. The designation signals for specifying the five fingers of the decoder 33 are the second to sixth OR circuits 352 to 352.
It is input to the finger designation display device 39 via 356.

Further, the passerby inserts / presses his / her finger into the fingerprint reader 11 of the detection / judgment means 1 following the operation of the card reader 21 to read the fingerprint, and the added characteristic pattern of the finger and the addition. When the coincidence detector 14 determines that the characteristic data pattern output from the characteristic pattern memory 13 matches based on the selection signal output from the device 38, the electric unlocking signal is output to the door. At the same time as being sent, a permission display is displayed on the fingerprint permission display unit 15, and a passerby can open the door and pass after confirming the fingerprint permission on the permission display. Also, the above coincidence detector 1
If the fact that the match is not determined by the 4, _OM 1 36
A passerby puts his / her finger back on the fingerprint reader 11 for 3 seconds during which the activation signal 1 is output, and the fingerprint detection operation is performed.

If the match detector 14 does not determine a match regardless of the fingerprint detection operation, the OM ₂ 362 sends an activation signal for 3 seconds to turn on the second and fourth gates 372 and 374 to turn the second decoder 32 on. The address signal of the next middle finger, which is the detected finger, is input to the adder 38, and the finger designation signal for identifying each of the five fingers of the fourth decoder 34 is input to the finger designation display 39. Based on the display of the finger designation display device 39, the passerby inserts and presses the middle finger into the reader 11 to read the fingerprint. Based on the fingerprint thus read, a match is determined in the same manner as the index finger which is the first detection finger.

Furthermore, if no match is determined in the detection result of the middle finger, which is the second fingerprint detection, the OM ₂
Simultaneously with the stop of the output of the activation signal of 362, the OM ₃ 363 sends the activation signal for 2 seconds, and this activation signal is input to the card reader 21 as a reset signal, and the card number that has been latched until then is canceled. At the same time, the re-operation indicator 22 is instructed to re-operate the number input means 2. The passerby confirms the instruction of the re-operation, inserts the card into the card reader again, and the same operation as described above is performed.

That is, the characteristic pattern of the characteristic pattern storage unit including the characteristic pattern memory 13 and the fingerprint detected by the fingerprint detection unit including the fingerprint reader 11 are compared in the order registered in the characteristic pattern storage unit, and the coincidence is determined. OM to detect
₁ 361, OM ₂ 362, the coincidence detector 14 and the like constitute the coincidence detecting means, and the coincidence of the fingerprint of the index finger and the fingerprint of the middle finger is judged.

As described above, the fingerprint identification device according to the present embodiment relates to the fingerprint detection means including the fingerprint reader 11 that detects the fingerprints of a plurality of fingers of the subject, and the plurality of fingers of the subject.
The characteristic pattern storage means including the characteristic pattern memory 13 for storing the characteristic pattern of the fingerprint registered in advance, the characteristic pattern of the characteristic pattern storage means and the fingerprint detected by the fingerprint detection means are registered in the characteristic pattern storage means. Between the fingerprint characteristic pattern and one or more fingerprints of the finger of the person to be detected, which are pre-registered by the coincidence detecting means, the coincidence detecting means including the coincidence detector 14 for comparing the coincidence and detecting the coincidence. When a match is detected, the detection means 1 and the finger selection means 3 for determining the same person as the person having the fingerprint of the pre-registered characteristic pattern are provided.

Therefore, the fingerprint identification device of the present embodiment sets the accuracy to such an extent that the detection accuracy does not change depending on the installation conditions, seasons, conditions of the human body, etc., and collates a plurality of fingers with the fingerprint pattern stored in the file. If the two do not match, the recognition probability of the device can be increased by sequentially changing the finger, and the malfunction can be prevented. Of course,
Even a detected person who injured a specific finger can determine whether the fingerprints match with any other finger of the detected person.

Further, since the question is whether the fingerprints of one or more fingers are in agreement during that time, the fingerprint identification device has fingerprints of a plurality of fingers even if the detection accuracy is lowered due to installation conditions, seasons, conditions of the human body, and the like. Because it can be determined by determining the match of
It does not reduce the reliability of recognition.

The detection / judgment means 1 of this embodiment comprises a single fingerprint reader 11
In this configuration, two kinds of fingers (index finger and middle finger) are sequentially detected. However, when fingerprints of plural kinds (two kinds to five kinds) are detected at the same time and any one of the detected fingerprints is matched, It can also be configured to judge that they are the same person.

The number input means 2 of the present embodiment can be constituted by any means other than the card reader 21 as long as it can input a numeric keypad or other personal ID code.

The finger designation display device 39 of the present embodiment is configured to be a display that allows the user to visually recognize which of the five fingers is to be read, as well as an auditory (voice) display and a tactile (finger sensation for the blind) display. You can also

The number input means 2 of the present embodiment has an ID obtained by inputting an ID card into the card reader 21, but in addition to this, which one of the five fingers is placed first and then which one is placed on the fingerprint reader 11. It may be configured such that whether or not to perform is the content of the ID.

The electric unlocking command to the door of the entrance / exit may be configured to output an opening / closing command when the door is an automatic door.

The detection determining unit 1 may be configured to determine the next finger when the person to be detected operates the reset switch when the match determination cannot be obtained for the fingerprint of one type of finger.

[Effects of the Invention] As described above, the fingerprint identification device of the present invention relates to a plurality of fingers of a person to be detected, a characteristic pattern storage unit that stores a characteristic pattern of a fingerprint registered in advance, and the characteristic pattern storage unit. Comparing the characteristic pattern and the fingerprint detected by the fingerprint detecting means for detecting the fingerprint of the finger of the person to be detected, in the order registered in the characteristic pattern storing means,
The matching detecting means for detecting the matching and the fingerprint of the finger of the subject whose matching is detected by the matching detecting means are
Since it is provided with a discriminating unit that discriminates the same person when a match of two or more fingers is detected, the fingerprint of a plurality of fingers is at least one kind for a person having trouble in discriminating fingerprints. When a match is detected, it can be judged that the same person, it is possible to pass with other registered fingers that do not interfere, and the judgment of the same person is elastic in the passage control,
Moreover, there is an effect that it can be smoothly operated.

Further, the fingerprint identification device of the present invention sets the accuracy such that the detection accuracy does not change depending on the installation conditions, the seasons, the conditions of the human body, etc., and collates a plurality of fingers with a fingerprint pattern stored in a file, If they do not match, the recognition probability of the device can be increased by sequentially changing the finger, and the malfunction can be prevented. As a matter of course, there is an effect that even a detected person who injured a specific finger can determine whether the fingerprints match with another finger of the detected person.

Furthermore, since the question is whether the fingerprints of one or more fingers are in agreement during that time, the fingerprint discriminating apparatus has the fingerprints of a plurality of fingers even if the detection accuracy is lowered due to installation conditions, seasons, human body conditions and the like. Because it can be determined by determining the match of
This has an effect that the reliability of recognition is not deteriorated.

[Brief description of drawings]

FIG. 1 shows an overall circuit block diagram for explaining a fingerprint discrimination device according to an embodiment of the present invention. In the figure, there are: 1: detection determination means 2: number input means 3: finger selection means 11: fingerprint reader 12: characteristic pattern extraction device 13: characteristic pattern memory 14: coincidence detector 15: fingerprint permission display 21: card reader. . In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

Claims (3)

[Claims] 1. A fingerprint detection unit for detecting fingerprints of a plurality of fingers of a person to be detected, and a characteristic pattern memory for storing characteristic patterns of fingerprints registered in advance for a plurality of fingers of the person to be detected. Means, the feature pattern of the feature pattern storage means and the fingerprint detected by the fingerprint detection means are compared in the order registered in the feature pattern storage means, and a match detection means for detecting the match is provided; When the detection means detects a match between the pre-registered fingerprint feature pattern and one or more fingerprints of the subject's finger, the person is the same person as the pre-registered fingerprint fingerprint pattern. A fingerprint discriminating apparatus comprising: a discriminating means for discriminating. 2. The fingerprint discriminating apparatus according to claim 1, wherein the coincidence detecting means sequentially discriminates a plurality of fingerprints detected by the fingerprint detecting means. 3. The coincidence detection means detects the coincidence of the fingerprints of the next finger only when no coincidence is detected for a predetermined first finger of the plurality of fingers of the subject. Claims characterized by Claim 1 or 2
The fingerprint identification device according to the item.