JPH064649A - Finger print collation device - Google Patents

Abstract

PURPOSE:To obtain a cheap compact finger print collation device which can collate a finger print without using a large capacity memory and an expensive memory card for storing a registered finger print. CONSTITUTION:By using not the registered finger print itself but a finger print registration card 10 obtained by copying only a feature image after image processing, a feature quantity extraction circuit 4 extracts a feature quantity to store it in a register 12. A collation circuit 9 collates the feature quantity of a live finger print obtained by the feature quantity extraction circuit 4 based on the feature image signal of the live finger print by way of a camera 2 and an image processing circuit 3 and the feature quantity of the registered finger print stored in the register 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint collation device used for personal authentication in entrance / exit management of important facilities.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a conventional fingerprint collation device. In the figure, 1 is a fingerprint sensor that outputs a detection signal when a finger is placed, 2 is a camera that captures a fingerprint based on the detection signal, 3 is a fingerprint image signal of a live fingerprint from the camera 2, and 2 is input. An image processing circuit 4 for performing value conversion and thinning processing and transmitting a characteristic image signal is a characteristic amount extraction circuit for extracting a characteristic amount of a live fingerprint from the characteristic image signal.

Reference numeral 5 is a registration data memory in which the registered amount of registered fingerprints is stored at each address. A personal identification code corresponding to the input from the ten key 6 is output from the personal identification code register 7, and the personal identification code is used as an address. The feature quantity of can be specified. Further, 8 is a mode switch for switching between registration and verification, which enables registration of the feature amount of the live fingerprint from the feature extraction circuit 4 in the registration data memory 5 at the address specified at the time of registration. The characteristic amount of the live fingerprint and the registration amount of the registered fingerprint stored in the registration data memory 5 are collated by the collation circuit 9.

Next, a specific operation will be described. (1) Operation at the time of registration First, the mode switch 8 is switched to the "E" side, the personal identification number for the corresponding fingerprint is input by the ten-key pad 6, the personal identification number is written in the personal identification code register 7, and the finger is used for the fingerprint sensor 1.
The camera 2 captures a live fingerprint obtained by applying the image to the image processing circuit 3 and inputs it as a fingerprint image signal.

The image processing circuit 3 binarizes and thins the fingerprint image signal, and a characteristic amount extraction circuit 4 as a characteristic image signal.
To enter. The feature amount extraction circuit 4 extracts the feature amount of the live fingerprint from the feature image signal and inputs it to the registered data memory 5 via the mode switch 8. Since the personal identification code corresponding to the fingerprint is input to the registration data memory 5 as an address, the characteristic amount is written in the corresponding address.

(2) Operation at the time of verification First, the mode switch 8 is switched to the "V" side, and the finger is brought into contact with the fingerprint sensor 1, so that the characteristic amount of the live fingerprint is extracted in the same manner as at the time of registration. Is output from the device, and the feature amount is input to the matching circuit 9 via the mode switch 8.

Then, in the same manner as the registration, the numeric keypad 6
By inputting the personal identification number of the corresponding fingerprint, the personal identification code as the address code is input from the personal identification code register 7 to the registration data memory 5, and the characteristic amount of the corresponding registered fingerprint is read out and input to the matching circuit 9. It As a result, the matching circuit 9 discriminates whether or not the two feature quantities match, and outputs the determination result.

[0008]

Since the conventional fingerprint collation device is configured as described above, the registration data memory 5 for storing the feature amount of the registered fingerprint is required, which is enormous when the number of registered people increases. It was necessary to incorporate a large amount of memory.

Further, as disclosed in Japanese Utility Model Laid-Open No. 62-11436, a system has been proposed in which a transferred fingerprint itself is stored in a card for each person, but 500 bytes is required to store a fingerprint per person. It requires a certain amount of memory,
It was necessary to use an expensive card such as a memory card.

The present invention has been made in order to solve the problems in the above-mentioned conventional example, and does not use a large-capacity memory or an expensive memory card for storing the characteristic amount of the registration index, and the fingerprint collation is performed. It is an object of the present invention to obtain an inexpensive and small fingerprint collation device capable of performing.

[0011]

A fingerprint collation device according to the present invention is a fingerprint collation device for collating a feature amount obtained by reading a fingerprint with a feature amount of a fingerprint registered in advance. It is characterized in that it is provided with a fingerprint registration card and a feature quantity extraction means for reading the feature image of this card and extracting the feature quantity, and using the extracted feature quantity as the feature quantity of the registered fingerprint. .

[0012]

The fingerprint collating apparatus according to the present invention uses an inexpensive card formed by transferring the characteristic image of each person's fingerprint, and the characteristic amount extracting means reads the characteristic image from the card to extract the characteristic amount. The feature amount of the registered fingerprint is obtained by.

[0013]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 in which the same parts as those in FIG. 3 are denoted by the same reference numerals, 10 is a fingerprint registration which is not a registered fingerprint itself, but is a transparent plate formed by transferring only a feature image after image processing that has been binarized and thinned. Card, 11 is the fingerprint registration card 1
In the card reader camera which obtains the registration image signal of the registered fingerprint from 0, the characteristic image signal of the registered fingerprint is input to the characteristic amount extraction circuit 4 via the changeover switch 14.

Further, 12 is a registration register for storing the characteristic amount of the registered fingerprint extracted by the characteristic amount extracting circuit 4 via the changeover switch 15, and 13 is a registration completion pulse sent from the registration register 12 when the registration is completed. Based on this, the selection signal from the Q terminal to the changeover switches 14 and 15 is significantly switched to the I ₁ and I ₂ sides, and at the time of completion of matching between the live fingerprint feature amount and the registered fingerprint feature amount, a matching circuit is completed. 9 is a flip-flop which is reset based on the registration completion pulse sent from 9 to make the selection signals to the change-over switches 14 and 15 insignificant.

The fingerprint registration card 10 shown in FIG.
It is formed by the process shown in. First, as shown in FIG. 1, the characteristic image signal of the registered fingerprint that has been binarized and thinned through the image processing circuit 3 of the fingerprint collation device 21 is input to the hard copy device 22.
From 2, the characteristic image of the registered fingerprint is transferred onto the transparent film.

Then, the transparent film 23 on which the above-mentioned characteristic image is transferred is superposed on the transparent portion 24a of the card substrate 24 on one side of which the design, characters and the like are silk-printed, and cut into a specific shape, and lamineret processing is performed on this. The fingerprint registration card 10 is formed.

Next, the operation of the above configuration will be described. First, since the flip-flop 13 is in the reset state and the selection signal is insignificant, the changeover switches 14 and 15 are set to T.
It is switched to ₁ and T ₂ . In this state, the characteristic image printed on the fingerprint registration card 10 carried by each person is captured by the card reader camera 11, and the characteristic image signal of the registered fingerprint is extracted via the changeover switch 14 from the characteristic amount extraction circuit 4
To enter. Then, the characteristic amount of the registered fingerprint is extracted by the characteristic amount extraction circuit 4 and stored in the registration register 12 via the changeover switch 15.

When the registration register 12 completes the storage of the feature quantity of the registered fingerprint, the registration completion pulse is generated in the flip-flop 13, the flip-flop 13 is set and the selection signal becomes significant, and the changeover switches 14 and 15 are I ₁ , I. Switch to ₂ side. By touching the fingerprint sensor 1 with a finger in this state, the live fingerprint image signal is converted into a characteristic image signal by the image processing circuit 3 by the same operation as in the conventional technique, and the characteristic amount extraction circuit is changed via the changeover switch 14. 4 is input, and the feature amount is extracted.

The characteristic amount of the registered fingerprint stored in the registration register 12 and the characteristic amount extracted by the characteristic amount extracting circuit 4 are input to the collating circuit 9, and the collating circuit 9 uses both characteristic amounts as in the prior art. Discriminates whether or not they match, and outputs the determination result.

[0020]

As described above, according to the present invention, the characteristic image of the registered fingerprint is read from the card by using the card in which the characteristic image of the fingerprint after the image processing is transferred instead of the fingerprint itself. Since the feature amount is extracted and the feature amount of the registered fingerprint is compared with the feature amount of the live fingerprint by the matching circuit, a large capacity memory or an expensive memory card is not required to store the registered fingerprint, An inexpensive and small fingerprint matching device can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a fingerprint matching device according to an embodiment of the present invention.

FIG. 2 is a process drawing of the fingerprint registration card 10 used in FIG.

FIG. 3 is a block diagram showing a conventional fingerprint collation device.

[Explanation of symbols]

 3 image processing circuit 4 feature amount extraction circuit 9 collation circuit 10 fingerprint registration card 12 registration register

Claims (1)

[Claims] 1. A fingerprint registration device to which a characteristic image of a fingerprint is transferred, and a characteristic image of this card in a fingerprint collation device that collates the characteristic amount obtained by reading a fingerprint with the characteristic amount of a fingerprint registered in advance. A fingerprint collation apparatus comprising: a feature amount extraction unit that reads and extracts the feature amount, and uses the extracted feature amount as a feature amount of a registered fingerprint.