JP2972116B2 - Fingerprint collation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint collating apparatus for reading a fingerprint and collating the read fingerprint with a registered fingerprint.

[0002]

2. Description of the Related Art Conventionally, by placing one finger on a fingerprint sensor, a concave / convex pattern of the fingerprint is read, and the read fingerprint information is compared with already registered fingerprint information to identify the user. There is a fingerprint collation device to identify. In such a fingerprint collation device, it is conceivable to lower the collation accuracy determination level in order to speed up the collation operation and increase the collation rate, but in such a case, the probability of misidentification as a fingerprint of another person is increased. Will increase. Therefore, it is conceivable to collate two or more fingers.
In such a case, the collation accuracy can be increased even if the collation accuracy determination level is lowered, and therefore, the probability of misrecognition with another person is reduced.

[0003]

However, in order to collate a plurality of fingers with a fingerprint, it is necessary to place fingers one by one on a fingerprint sensor and collate each finger one by one, and the collation operation is troublesome. Had become something. It is also conceivable to provide a fingerprint sensor for the number of collation fingers and collate a plurality of fingers at the same time. However, in this case, there is a problem that the number of components constituting the apparatus increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a fingerprint matching device capable of performing fingerprint matching of a plurality of fingers simultaneously without providing a plurality of fingerprint reading units. And

[0005]

According to the present invention, there is provided a fingerprint collating apparatus which heat-fuses a bundle of optical fibers and optically images a plurality of fingerprints placed on an inclined end face via an electronic shutter. A plurality of optical elements to be transmitted to the optical element, an optical lens disposed in close contact with the other end face side of these optical elements, for condensing an optical image by the optical element, and an imaging element for capturing an optical image through the optical lens And a light source that uniformly irradiates the inclined end face of each of the optical elements with the light flux under the condition of total reflection via the optical lens, and controls power supply to the light source, and any one of the plurality of electronic shutters. An image processing circuit for alternately controlling the switching so as to sequentially open one of the plurality of fingerprints to obtain recognition images of a plurality of fingerprints by the image pickup device. It is characterized in that matching of the recognition image.

A data processing means which is connected to the fingerprint reading apparatus via a connection cable and performs feature extraction and parameterization based on a fingerprint recognition image obtained from the fingerprint reading apparatus, and communication with the data processing means A verification unit connected via a line for performing fingerprint verification of a registrant based on parameters sent from the data processing unit.

[0007]

In the fingerprint collating apparatus according to the present invention, a plurality of optical images of a plurality of fingerprints which are obtained by thermally fusing a bundle of optical fibers and which are placed on the inclined end face are transmitted to the other end face side via the electronic shutter. An optical element, an optical lens which is arranged in close contact with the other end surface side of the optical element and collects an optical image by the optical element, an imaging element which captures an optical image via the optical lens, and the optical lens And a light source for uniformly irradiating the inclined end surfaces of the optical elements with a light beam under the condition of total internal reflection, controlling the power supply to the light source, and sequentially opening one of the plurality of electronic shutters. An image processing circuit that alternately controls switching to obtain recognition images of a plurality of fingerprints by the image pickup device can achieve a significant reduction in the size of the fingerprint reading device, and can reduce the size of the image due to the attachment of dust and the like. Can be prevented deterioration, also allows reading multiple fingerprints at the same time.

Further, data processing means connected to the fingerprint reading apparatus via a connection cable to perform feature extraction and parameterization based on a fingerprint recognition image obtained from the fingerprint reading apparatus, and to communicate with the data processing means Collation means for performing fingerprint matching of a registrant based on parameters sent from the data processing means connected via a line, whereby the registrant's Performing the fingerprint collation can prevent the data of the registrant from being falsified.

[0009]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram illustrating a fingerprint reading device portion of the fingerprint matching device according to the first embodiment. In FIG. 1, reference numeral 1 denotes a fingerprint reader that can simultaneously read a plurality of fingerprints. This fingerprint reader 1 is an image transmission device that heat-fuses a bundle of optical fibers to accurately transmit an optical image on one side to the other side. Optical elements 2a and 2b having functions, and electronic shutters 3a and 3b inserted in these optical elements 2a and 2b
An optical lens 4 for condensing an optical image by the two optical elements 2a and 2b, an imaging element 5 such as a CCD for capturing an optical image via the optical lens 4, and the optical lens 4 A light source 6 for irradiating the optical elements 2a and 2b with light, and a power supply to the light source 6 is controlled, and an open / close switching of the electronic shutters 3a and 3b is controlled to obtain a recognition image by the image pickup device 5. Circuit 7
And The image sensor 5, the light source 6, and the image processing circuit 7 are mounted on a substrate 8, and the image recognized by the image processing circuit 7 is transmitted through a connection cable connected to a connection terminal 9 provided on the substrate 8. And transmitted to a signal processing board described later.

In FIG. 1, at the time of fingerprint collation, the image processing circuit 7 always emits light from the light source 6, and the light flux is totally reflected on the slopes, which are one end surfaces of the optical elements 2a and 2b. When the thumb and the index finger are placed on the slopes of the optical elements 2a and 2b, for example, a part of the irradiation light escapes through the finger at the peak of the fingerprint, Since the portion is dark, the peak portion of the fingerprint is dark, and the valley portion is a bright fingerprint pattern. The fingerprint pattern is accurately passed through the optical lens 4 closely attached to the other end face by the optical elements 2a and 2b. The data is transmitted to the image sensor 5 and the image processing circuit 7.

Here, when the thumb and the forefinger are placed on the slopes of the optical elements 2a and 2b, the image processing circuit 7 causes the thumbs and the index finger to fall on the slopes of the optical elements 2a and 2b due to a decrease in the reflectance of the light. The image processing circuit 7 closes the electronic shutter 2a, opens the electronic shutter 2b, reads the fingerprint of the thumb, and then opens the electronic shutter 2a. ,
By closing the electronic shutter 2b, the fingerprint of the index finger is read, and these fingerprint patterns can be obtained via the optical lens 4 and the image sensor 5.

Therefore, according to the above configuration, the optical element 2a
And 2b, the electronic shutters 3a and 3b, the optical lens 4, the image sensor 5, and the light source 6 can be configured in close contact with each other, so that a significant reduction in size can be achieved and the deterioration of the image due to the adhesion of dust and the like can be prevented.

Next, FIG. 2 is a schematic configuration diagram showing the overall configuration of the fingerprint collation apparatus. In FIG. 2, reference numeral 10 denotes a signal processing board 10a which is connected to the fingerprint reader 1 via a connection cable 11 and converts a fingerprint image signal obtained from the fingerprint reader 1 into an internal signal form. A personal computer 20 as a data processing means for performing feature extraction and parameterization is connected to the personal computer 10 via a communication line 21 and performs collation for fingerprint registration of a registrant based on parameters sent from the personal computer 10. The host computer 20 is a communication line 21 with the personal computer 10.
Is provided at a remote location through the server to prevent falsification of registrant registration data.

In the above configuration, after the fingerprint image signal obtained from the fingerprint reader 1 is converted into an internal signal form by the signal processing board 10a of the personal computer 10, the personal computer 1
Feature extraction is performed using 0, and parameterization is performed. Then, by being transmitted to the host computer 20 via the communication line 21, the host computer 20 performs fingerprint matching of the registrant based on the transmitted parameters, and is placed at a remote location via the communication line. Performing fingerprint registration of the registrant by the host computer 20 has the effect of preventing data of the registrant from being falsified.

In the above embodiment, the electronic shutters 3a and 3b are provided with the optical elements 2a and 2b interposed, and the thumb and the index finger are simultaneously read. However, the present invention is not limited to this. Needless to say, it is possible to simultaneously read a plurality of fingers.

[0016]

As described above, according to the present invention, the optical images of a plurality of fingerprints, which are obtained by thermally fusing a bundle of optical fibers and are placed on the inclined end face, are respectively sent to the other end side via the electronic shutter. A plurality of optical elements to be transmitted, an optical lens that is arranged in close contact with the other end surface side of these optical elements and collects an optical image by the optical elements, and an imaging element that captures an optical image through the optical lens, A light source for uniformly irradiating a light beam on the inclined end surface of each of the optical elements through the optical lens under the condition of total reflection, and a power supply to the light source is controlled, and one of the plurality of electronic shutters is controlled. An image processing circuit for alternately controlling the switching so as to sequentially open the fingerprint readers to obtain recognition images of a plurality of fingerprints by the above-described image pickup device can significantly reduce the size of the fingerprint reader, and can reduce the size of the image due to the attachment of dust and the like. Deterioration can be prevented, and there is an effect that can be read a plurality of fingerprints at the same time.

Further, data processing means connected to the fingerprint reading apparatus via a connection cable to perform feature extraction and parameterization based on a fingerprint recognition image obtained from the fingerprint reading apparatus, and to communicate with the data processing means Collation means for performing fingerprint matching of a registrant based on parameters sent from the data processing means connected via a line, whereby the registrant's Performing the fingerprint collation has the effect of preventing the data of the registrant from being falsified.

[Brief description of the drawings]

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

FIG. 2 is a schematic configuration diagram showing an overall configuration of a fingerprint matching device according to one embodiment of the present invention.

[Explanation of symbols]

1 Fingerprint reader, 2a, 2b Optical element, 3a, 3b
Electronic shutter, 4 optical lens, 5 image sensor, 6
Light source, 7 image processing circuit, 10 personal computer (data processing means), 11 connection cable, 20 host computer (verification means), 21 communication line.

Claims (2)

(57) [Claims] 1. A plurality of optical elements which are obtained by thermally fusing a bundle of optical fibers and transmit optical images of a plurality of fingerprints placed on an inclined end face to the other end face side through an electronic shutter, respectively. An optical lens that is disposed in close contact with the other end surface side to collect an optical image by the optical element, an imaging element that captures an optical image through the optical lens, and the optical element through the optical lens. A light source for uniformly irradiating the inclined end face with a light beam under the condition of total reflection, and a power supply to the light source are controlled, and switching is controlled alternately so as to sequentially open any one of the plurality of electronic shutters. A fingerprint reading device having an image processing circuit for obtaining recognition images of a plurality of fingerprints by the image pickup device, and collating the fingerprint recognition images read by the fingerprint reading device. Place. 2. A data processing means which is connected to the fingerprint reading apparatus via a connection cable, performs feature extraction and parameterization based on a fingerprint recognition image obtained from the fingerprint reading apparatus, and communicates with the data processing means. 2. The fingerprint matching device according to claim 1, further comprising matching means connected via a line and performing fingerprint matching of a registrant based on parameters sent from said data processing means.