JPH01209584A - Fingerprint collating device - Google Patents

Abstract

PURPOSE:To make a fingerprint collating device smaller and to reduce its costs by executing collation processings from plural input parts with a single collating part. CONSTITUTION:For collation requests from plural input parts 1 and 2 providing a card reader 8, fingerprint detecting means 10-12 and a display means 9, a collating part 3 executes a series of processings such as contrast displaying concerning the input of fingerprint pictures detected by one of input parts 1 and 2 at every prescribed time by a fingerprint picture processing means. Further, in the residual time out of the prescribed time, a processing to take in the fingerprint data of a user registered to an IC card 4 beforehand into a memory means or a processing by the fingerprint picture processing means, the memory means or a collating means with respect to the other input part is executed. Consequently, a single collating part 3 can processes the collating requests from the plural input parts 1 and 2 in parallel or continuously. Thus, the fingerprint collating part can be made smaller and its costs can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fingerprint matching device as a personal identification means used in a keyless entry system, a computer room entry control system, or the like.

(Prior art) The technology of collating fingerprints, which are the physical characteristics of nine individuals, using a computer has been widely known as a means of personal identification. From this point of view, it had not been put to practical use as a general means of personal identification. However, in recent years, with the spread of IC cards, fingerprint data of J users has become increasingly important.
A system has been proposed in which the user's fingerprint is recorded on a C-canid and the user's fingerprint is compared with the fingerprint registered on the IC card the user owns to perform personal verification.

Conventional fingerprint identification devices using such IC cards are
It consists of an input section that reads out the data registered on the IC card and detects the fingerprint using a television camera, etc., and a verification section that matches the registered data read out from the IC card with the fingerprint image detected from the input section. , Usually, the registration data of the IC card is first read out by the input section and taken into the verification section, then the user's fingerprint image is detected by the input section and taken into the verification section, and then registered in the IC card by the verification section. The fingerprint data and the fingerprint image detected by the input unit are compared by pattern matching or the like.

Furthermore, when detecting a user's fingerprint image using the input section, if the user's finger is dry, a clear fingerprint image with appropriate contrast cannot be detected. It is easy to misidentify the endpoints and branching points of
The contrast of the fingerprint image detected by the input unit is calculated, and it is determined whether the contrast is appropriate. If the contrast is not appropriate, a message to that effect is displayed and the user is asked to place their finger on the prism. The system waits for moisture such as sweat and oil to appear on the surface of the finger and the contact between the finger and the prism increases, and then captures the fingerprint image that has been determined to have an appropriate contrast state as the detection result. .

[Problem to be solved by the invention] Considering the actual usage situation of such a fingerprint verification device,
There are many situations in which multiple fingerprint verification devices are installed in relatively close locations. By configuring the matching section to perform the matching, it is possible to reduce the number of matching sections equipped with expensive pattern matching processing hardware, thereby reducing the size and cost of the apparatus. However, with conventional fingerprint identification devices, I
It takes several seconds for the fingerprint verification process, which consists of reading the registration data of the C-card, inputting the fingerprint image including contrast calculation, and verification, so if the verification process from multiple input units is sequentially processed in the order of input, it will save the user's time. The waiting time was long and it was not practical. Further, it is possible to configure the system so that the verification processing from a plurality of input sections is performed in parallel by one verification section.

A number of hardware for pattern matching processing corresponding to the number of input units is required, making it impossible to achieve miniaturization and cost reduction.

Accordingly, the present invention aims to reduce the size and cost of a fingerprint verification device by making it possible for a single verification section to perform verification processing from a plurality of input sections.

[Means for Solving the Problems] The present invention provides an IC card in which a user's fingerprint data is registered, a card reader that reads the registered data in the IC card, a fingerprint detection unit that detects a user's fingerprint image, and a fingerprint. one or more input units equipped with a display means for displaying the contrast state of the image; and calculating the contrast by taking in the fingerprint image detected by the fingerprint detection means;
Fingerprint image processing means for outputting calculation results to a display means and performing a series of processes for determining suitability at predetermined intervals; storage means for storing fingerprint data in the IC card read by the card reader; and the fingerprint. a collation unit that includes a collation unit that collates the fingerprint image determined to be in an appropriate contrast state by the image processing unit and the fingerprint data stored in the storage unit; performs a series of processes for the two input units at predetermined time intervals, and during the remaining time of the predetermined time, the storage means captures fingerprint data for the two input units or processes the fingerprint image. The means, storage means, or collation means is configured to perform processing on the other input section.

[Effect] The present invention is applicable to inputting a user's fingerprint image.

The series of processing to capture the detected fingerprint image, calculate, judge, and display the contrast state takes 200m5ec, which is much longer than the time normally required for the above-mentioned series, considering the speed at which moisture appears on the finger surface. Focusing on the fact that it is sufficient to execute the process every 200m5ec (in fact, there is no problem even if it is executed every 200m5ec), we decided to perform a series of processes related to fingerprint image input within this time interval. The purpose is to use the remaining time to perform other processing. That is, in the above configuration, in the input section, the fingerprint detection means detects the user's fingerprint, the card reader reads out the fingerprint data registered on the IC card and sends them to the verification section, and the display means detects the fingerprint of the user. On the other hand, in the matching section, if there is a single input section to be subjected to matching processing, the fingerprint image processing means takes in the fingerprint image detected from the input section, performs contrast calculation, A series of processes including output to the display means and determination of suitability are repeated at predetermined time intervals until a fingerprint image with an appropriate contrast state is obtained, and the time required for the series of processes by the fingerprint image processing means within this predetermined time is At a time other than that, the storage means takes in the fingerprint data in the IC card from the input section.

Thereafter, the verification means compares the fingerprint image determined to be in an appropriate contrast state by the fingerprint image processing means with the fingerprint data in the IC card imported into the storage means. If they exist in parallel, in the matching section, the fingerprint image processing means performs a series of processing on one input section at predetermined time intervals, and performs a series of processing on one input section or the other input section during the remaining time of the predetermined time. The storage means takes in the fingerprint data in the IC card, or the other input section is processed by the fingerprint image processing means or collation means.

[Example] FIG. 1 is a diagram showing the configuration of a first embodiment of the present invention.

In FIG. 1, 1 and 2 are the first and second
3 is an input unit, 4 is an IC card in which the user's ID code and fingerprint data are registered in advance, 5 and 6 are doors whose opening and closing are controlled by input units 1 and 2, respectively, and 7 is a user's finger. It is. The input unit 1 includes a card reader 8 that reads registered data in the IC card 4, a display device 9 that displays the contrast state of the detected fingerprint image of the user, various messages, etc., and a prism on which the user's finger 7 is placed. 10. Illumination device 1 that irradiates light onto the prism 10
11 and a television camera 12 that takes a fingerprint image of the finger 7 in contact with the prism 10, and a card reader 81 display device 9. It is comprised of a fingerprint detection means and an input part control device 13 that controls the operation of an opening/closing actuator (not shown) of the door 5, and the second input part 2 is also constructed in the same manner as the first input part 1. . The matching section 3 has a matching section control device 14 configured by a so-called computer consisting of an arithmetic unit, a storage device, an input/output device, pattern matching hardware, etc. Input unit control device 13 of each input unit 1 and 2 (second input unit 2 is not shown)
), and a multiplexer 17 for inputting the output of the television camera 12 (the second input section 2 is not shown) of the fingerprint detection means of each input section 1 and 2 to the verification section control device 14. and an AD converter 18,
The fingerprint images detected in the input units 1 and 2 are input to the multiplexer 17 via signal lines 19 and 20, respectively, and then sequentially input into the verification unit control device 14 via the AD converter 18. ing.

Next, the operation of this embodiment will be explained with reference to FIG. 2, which shows a control flowchart of the matching section 3. In FIG. 2, when the power is turned on, the collation unit control unit W14 of the collation unit 3 starts its arithmetic processing at a start step 100, and first, at step 101, predetermined constants necessary for control, memory initialization, etc. After performing the initialization process, the process proceeds to step 102 of determining whether the verification request command has been received, and repeats step 102 until the verification request command is received, and waits for the command to be sent.This verification request command is sent to the input section. This command is sent to the collation unit 3 from the input unit control bag M13 of the input unit when the IC card 4 is inserted into the input unit 1 or 2.
Assuming that the card 4 is inserted, the collation unit 3 receives the collation request command from the input unit 1, the determination in step 102 becomes Yes, and the process proceeds to step 103, where the verification unit 3 receives the verification request command from the input unit 1. ) sends a BUSY command. When the input unit control device 1f13 of the input unit 2 receives the BUSY command, it displays “Please wait for a while” on the display R9.
” is displayed, and the IC in the input section 2 is displayed.
The verification unit 3 stops accepting cards at step 10.
Proceeding to step 4, a verification start command is sent to the input unit 1, which is the input unit targeted for verification processing (hereinafter referred to as the target input unit). When the input unit control device 13 of the input unit 1 receives the verification start command, it inputs the ID registered in the IC card 4.
A code (for example, a company code, an employee code, etc.) is read out by the card reader 8 and transmitted to the verification unit 3. The collation unit 3 receives the ID code from the input unit 1 in step 105, and collates the ID code registered in advance in the memory in the collation unit control device 14 with the ID code received in step 105 in step 106. If the ID codes do not match in step 106, the process proceeds to step 107 and sends an ID code mismatch command to input unit 1, which is the target input unit, and then in step 108, sends a READY command to input unit 2, which is another input unit. After that, the process returns to step 102 and waits for the verification request command to be sent. Here, the input unit 1 that received the ID code mismatch command
The input section control device 13 of the input section 2 displays the message "This IC card is not registered" on the display device 9, and the input section control device R13 of the input section 2 that received the READY command displays the message on the display device 9. "Please insert your IC card" is displayed, and the input section 2
We will resume accepting C cards.

If the ID codes match in step 106, the process proceeds to step 109, and an image input start command is sent to the input unit 1, which is the target input unit. When the input unit 1 receives the image input start command, the input unit control device W13 controls the display device 9.
At the same time as displaying the message "Please put your finger on the r finger," an illumination device 11 is turned on to irradiate light onto the prism 10, and an image of the user's fingerprint pressed against the prism 10 is photographed by a television camera 12. On the other hand, the collation unit 3 proceeds to step 110 and takes in the fingerprint image detected by the input unit 1 as a black and white grayscale image of 16 bits per pixel via the AD converter 18.

In step 111, the contrast between the two images of the fingerprint (specifically, a histogram of density levels) is calculated, and in step 1
In step 12, the calculation result is sent to the input unit 1 as contrast data. In the input section 1, the contrast data received by the input section control device 13 is displayed on the display device 9 in the form of a level meter in the form of a bar graph, for example, to inform the user of the contrast state of the fingerprint image, and also to display the contrast data of the fingerprint image in the form of a level meter. The user is asked to adjust the force with which he or she presses his or her finger against the prism 10, aiming for the center level of the level meter displayed as a bar graph, so that the histogram has a good contrast with almost even distribution between the white and black levels. 0 Next, the verification unit 3 proceeds to step 113 and checks the IC card 4.
It is determined whether or not the registered fingerprint data registered in .
The process proceeds to Step 4, where one block of registered fingerprint data in the IC card 4 is received from the input unit 1 and stored, and then the process proceeds to Step 115.If the determination in Step 113 is Yes, the process directly proceeds to Step 115 without going through Step 114. In step 115, it is determined whether or not the fingerprint image input is to be ended by determining whether the contrast of the fingerprint image calculated in step 111 is within a suitable range. becomes No, and the process returns to step 110. Therefore, until it is determined in step 115 that the image input is completed, steps 110 to 11
Step 5 is repeated, and the steps of capturing the user's fingerprint image→contrast calculation→transmission of calculation results→reception of registered fingerprint data in the IC card (if reception has not been completed)→contrast determination are repeated. Here, the memory structure in an IC card is generally composed of multiple blocks with a block length of several tens of bytes, and the memory can be read and written as serial data in block units, so the communication speed of serial data is assumed to be 9600 bits/sec. , if the block length is 64 bytes, the time required for the collation unit 3 to read one block of registered data in the IC card 4 is approximately 80 m.
5ec, and the time required for the series of processing from step 110 to step 115 is about 200 m5ec, but it is sufficient if the contrast level received at the input section is displayed every 200 m5ec. A timer may be used so that steps 110 through 112 are performed approximately every 200 m5ec. As described above, according to the present invention, it is possible to repeatedly execute processing related to fingerprint image input, such as determining contrast, at predetermined intervals, and to read registered data in an IC card in the remaining time. .

If it is determined in step 115 that the contrast state of the fingerprint image is good and image input is complete, the collation unit 3 proceeds to step 116 and determines whether or not the registered fingerprint data in the IC card 4 has been received.

If not, the process returns to step 114 and after receiving one block of registered fingerprint data, the process proceeds to step 116 via step 115, and steps 114 to 1 are repeated until all the registered fingerprint data in the IC card 4 is received.
Repeat step 16. In step 116, the IC card 4
If the reception of the registered fingerprint data in
The registered fingerprint data read from the card 4 is compared using a pattern matching algorithm.

Thereafter, the matching section 3 proceeds to step 118 and sends the matching result to the input section 1, which is the target input section, and then proceeds to step 108.
The process proceeds to step 102, where a READY command is sent to another input section (input section 2), and the process returns to step 102. Further, when the input unit 1 receives a verification result indicating that the fingerprints match, the input unit 1 displays a message “Identification has been confirmed” on the display device 9 and causes the door 5 to be opened. =On the other hand, if the verification result indicating that the fingerprints do not match is received, a message "The fingerprints did not match the registered data" is displayed on the display device 9. At this time, for example, a message such as "Please reposition the r finger" is displayed, and the process returns to step 110 to execute the matching process. If the fingerprints do not match even after repeating 2 to 3 times, the matching process is terminated. It is also possible to display "The data did not match the registered data."

As described above, in this embodiment, a series of fingerprint image input processing consisting of fingerprint image input → contrast calculation → calculation result transmission (display) → contrast determination is repeated at predetermined intervals, and the remaining time of this processing is 9 in the IC card
Since the recorded fingerprint data is read, the fingerprint image input and the registered fingerprint data can be processed in parallel, and the time required for fingerprint verification can be shortened. Even if the configuration is such that the input unit is connected to one verification unit and the verification process is performed sequentially from the input unit that received the verification request first, the waiting time is short when verification requests overlap, causing discomfort to the user. This makes it substantially possible to perform fingerprint verification processing from a plurality of input units using a single verification unit.

Next, a second embodiment of the present invention will be explained. This embodiment has the same configuration as the first embodiment shown in FIG. This will be explained using FIGS. 3 to 5.

When the power is turned on, in the main routine shown in FIG. 3, the collation unit starts its arithmetic processing at start step 200, executes initialization processing at step 201, and executes the data reception interrupt routine shown in FIG. 4. After enabling interrupt processing by (1 or 2 in this example), F, □ indicates the image input processing end flag for the i-th input section, and F2□ indicates the registration in the IC card for the i-th input section. Indicates a fingerprint data reception completion flag. Further, the data reception interrupt routine in FIG. 4 receives a collation request command from any input section while the main routine is being executed.

This is a routine that interrupts and executes the main routine every time one byte of data, such as an ID code or registered fingerprint data, is received.While this data reception interrupt routine is being executed, the main routine is interrupted, and after the first interrupt routine is completed, Resume main routine.

Now, if an IC card is inserted into one of the input sections (referred to as the i-th input section), a verification request command is transmitted from the input section to the verification section. When the verification section receives the verification request command, it interrupts the main routine at that point and proceeds to the data reception interrupt routine shown in FIG. In the interrupt routine of FIG.
After starting the arithmetic processing and determining in step 301 from which input unit the data was received, in step 302
It is determined whether the received data is a collation request command or not, and if the determination is Yes, a collation start command is sent to the i-th input unit to which the data was transmitted in step 303, and the interrupt routine in charge is executed. Exit and restart the main routine from the point at which the interrupt occurred. The i-th input unit that receives the verification start command starts reading the registered data in the IC card, first reads out the ID code, and sends it to the verification unit. The collation section is I from the i11th input section.
When the D code is received, the main routine returns to the data reception interrupt routine, passes through steps 300 and 301, and at step 302, the determination is No because it is not a verification request command, and the process advances to step 304, where the received data is assigned an ID. Determine whether it is a code,
If the determination is Yes, the process proceeds to step 305. In step 305, it is determined whether the received ID code matches the ID code registered in the collation unit.

If they match, the process advances to step 306 and sends an image input start command to the i-th input unit, and then in step 307
After the timer T for the input section is set to 0, a timer interrupt for inputting an image is enabled in step 308, the data reception interrupt routine is ended, and the process returns to the main routine.

If the ID codes do not match in step 305, the process advances to step 309, where an ID mismatch command is transmitted to the i-th input section, and the interrupt routine ends. I
If no D mismatch command is received, the i-th input section is I.
Following the D code, the registered fingerprint data in the IC card is read out and sent to the collation unit, and the collation unit that receives the registered fingerprint data executes a data reception interrupt routine every time it receives one byte of data, and executes the data reception interrupt routine in step 300. After step 301, the determination in step 302 is N.

Then, the process proceeds to step 304, and when the determination in step 304 becomes No, the process proceeds to step 310.
It is determined whether the fingerprint data is registered fingerprint data or not. If the fingerprint data is registered fingerprint data, the determination becomes Yes and the process proceeds to step 311.

In step 311, the received 1-byte registered fingerprint data is stored in the registered fingerprint data storage area for the i-th input unit in the verification unit control device, and then the process proceeds to step 312, where it is determined whether or not the reception of the registered fingerprint data has been completed. Determine.

If not, terminate the interrupt routine.

After that, repeat the data interrupt routine in the same way.
Import the registered fingerprint data in the C card.

Then, if all the registered fingerprint data is received and it is determined in step 312 that the reception of the registered fingerprint data is completed.

Proceeding to step 313, the registered fingerprint data reception end flag F2□ for the i-th input section is turned ON, and then the interrupt routine is ended. Here, an interrupt due to reception of registered fingerprint data actually occurs approximately every 1 seconds, but
The process of storing 1 byte of data in the memory in the collation unit control device can be done in a very short time, so it takes about 1 m
Even if the above-mentioned interrupt occurs every 5ec, the main routine and the timer interrupt routine to be described later can be executed.

On the other hand, the i-th input unit that received the image input start command in step 306 starts detecting the fingerprint by the fingerprint detection means, and the matching unit starts a timer interrupt every 10s+aac from the time when the timer interrupt is enabled in step 308. The timer interrupt routine shown in FIG. 5 is executed. Note that this timer interrupt routine is inferior to the data reception interrupt routine in priority. When a timer interrupt occurs, arithmetic processing is first started from start step 400 in FIG.
Determine whether T,=20 in step 402,
If the determination is No, the timer interrupt routine is ended. This timer interrupt routine is repeated every lQmsec, and in step 402 TI=20 (20
0+asec elapsed), step 4
After proceeding to step 03 and setting T1 to O, the user's fingerprint image is inputted in the same manner as in the first embodiment. That is, in step 404, the user's fingerprint image detected there is input from the i-th input unit, in step 405, the contrast of the fingerprint image is calculated, and in step 406, the image of the user detected in step 40 is input.
After transmitting the contrast data calculated in step 5 to the i-th input unit, in step 407 it is determined whether image input is complete based on the suitability of the contrast. Step 407
If it is determined that image input is not to be completed in step 407, the timer interrupt routine is terminated, and the timer interrupt routine is repeatedly executed again to perform a series of processes related to fingerprint image input every 200 m5ec. If the image is obtained and it is determined that the image input has ended, the process proceeds to step 408, where the image input processing end flag F, 1 for the i-th input section is turned ON, and the timer interrupt routine is ended.

After enabling the timer interrupt in step 308 of the data interrupt routine of FIG.

Image input processing by the timer interrupt routine and reception processing of registered fingerprint data by the data reception interrupt routine proceed in parallel, and when the 1-car processing is completed, each flag F1 is set.
When □ and F2□ are turned on, the determination in step 202 in the main routine becomes Yes, and step 20
Proceed to step 3 and set both flags F11. After F21 and timer T1 are turned off, the step 204 performs a verification process on the i-th input section, and in step 205, the verification result is transmitted to the i-th input section. Then step 206
It is determined whether all timers T1 are OFF or not, and if the determination is Yes, timer interrupts are disabled in step 207 and the process returns to step 202. If the determination is NO, other input sections are disabled. Since the processing is in progress, the process returns directly to step 202 and waits for both the image input processing end flag FY and the registered fingerprint data reception end flag F2□ to turn ON for any input unit.

Next, a case will be described in which the verification request commands are sent to the verification section from the first and second input sections successively or simultaneously in this embodiment. Note that if the verification request commands are received at the same time, the verification section starts processing from the input section with the highest rank according to the preset order, so here, the IC card is inserted into the first input section first. or at the same time, and the priority of the first input section is higher. In this case, the collation unit interrupts the main routine in response to the collation request command from the first input unit and performs the fourth
Execute the data reception interrupt routine shown in the figure, and step 3
After sending the verification start command to the first input section at 03,
As described above, every time some data is received from the first input section, the data reception interrupt routine is executed to proceed with the fingerprint matching process for the first input section. On the other hand, when a verification request command is also sent from the second input section, the verification section
The data reception interrupt routine starts the fingerprint verification process for the second input section in the same manner as for the second input section. At this time, the collation unit generates an interrupt every time it receives data transmitted from the first and second input units, and sequentially executes a data interrupt routine for the received data to Fingerprint verification processing for the input section proceeds in parallel.

Then, for the first input unit that started processing earlier, the fourth input unit
In the data reception interrupt routine shown in the figure, after the ID codes match and the timer T for the first input section is set to 0 in steps 307 and 308 to enable a timer interrupt, the collation section executes a timer interrupt every 10 seconds. An interrupt occurs, and in addition to the data reception interrupt routine described above, the timer interrupt routine of FIG. 5 for the first input is executed.

The fingerprint image input process of steps 404 to 407 in FIG. 5 is executed for the first input unit every 200+asec. Furthermore, after the ID codes match in the data reception interrupt routine for the second input section and the timer T2 for the second input section is set to O, the verification section sends each step to both input sections in the timer interrupt routine. A timer T is executed for each input section every 10 seconds.

and T2 are increased by 1 each, and the fingerprint image input process in subsequent steps 404 to 407 is performed on the input unit for which the timer T1 was determined to be 20 in step 402.The actual processing procedure of the verification unit at this time is as follows: As shown in FIG. 6, the timer interrupt routine alternately performs the input processing of the fingerprint images in steps 404 to 407 to the first and second input sections for about 200 m5ec each.
At the same time, a data reception interrupt with the highest priority occurs during each step of the fingerprint image input process, and the process of storing 1 byte of registered fingerprint data in steps 310 to 312 is executed for each input unit. Each is executed repeatedly every 1 m5ec.

As mentioned above, the verification unit can store the received 1-byte registered fingerprint data in the data storage area corresponding to each input unit in an extremely short amount of time, so even if this process is performed every 1 m5ec, The processing time for image input processing is not significantly extended.

After the fingerprint image input processing for the first and second input sections and the storage of registered fingerprint data in the IC card proceed in parallel in this way, for example, after these processing for the first input section is completed, The image input processing end flag Fi1 and the registered fingerprint data reception end flag pat are both O.
If the result is N, execute steps 203 to 206 in the main routine to turn off all the one-car flags F, i, F, □ and the timer T, and then input the fingerprint image data and registered fingerprint data for the first input section. After that, since the timer T2 for the second input section is not yet OFF, step 202 is performed.
Return to and set both flags F2□5pat for the second input section.
The image input processing end flag F21 and the registered fingerprint data reception end flag F for the second input unit are then turned ON. If both are turned on, a matching process is performed on the second input section in the same manner, and then step 206 is performed.
Since all timers T are OFF, step 207
In step 202, timer interrupts are disabled, all processing is terminated, and the process returns to the initial state of step 202.

In addition, in this embodiment, when IC cards are inserted into both input sections at almost the same time, the fingerprint image input processing and the storage of registered fingerprint data for one input section are executed in parallel, and the processing for the input section on the rear side is executed almost simultaneously. A verification step 204 of the main routine may be reached. In such a case, the collation unit sequentially performs the collation process on each input unit, but since this collation process requires about 1 second, input units that later reach the collation step must wait during that time. However, fingerprint image input processing and storage of registered fingerprint data for both input sections can be executed in parallel, and the time required for these processes is actually very short compared to when processing only a single input section. Because you can
As a result, even if an IC card is inserted into both input sections at the same time, the time required for fingerprint verification processing for the two input sections is approximately 1.5 times the time required for processing only a single input section. Rapid fingerprint verification processing is possible.

As explained above, in this embodiment, in parallel with the fingerprint image input process for one input unit at predetermined time intervals and the storage process of registered fingerprint data, all processes related to fingerprint matching for the other input units can be executed. , it becomes possible to perform fingerprint matching processing from multiple input units with a single input unit.

Note that in the first and second embodiments described above, two input sections are each controlled by a single collation section, but it is possible to increase the number of input sections in these embodiments, and in that case, the number of input sections can be increased. 2 and 3 for the first and second embodiments, respectively.
This can be realized by the control method shown in FIGS.

Further, the first embodiment is suitable for cases where the number of input sections is small or when verification requests from multiple input sections occur at the same time, whereas the second embodiment is suitable for cases where the number of input sections is large or when verification requests from multiple input sections occur at the same time. This method is suitable for cases where verification requests from the input section of the system frequently occur at the same time.

[Effects] As explained above, in the present invention, in response to verification requests from a plurality of input sections each including a card reader, a fingerprint detection means, and a display means, the verification section checks the fingerprint image detected by one input section. A series of processes such as contrast display related to the input are performed at predetermined time intervals by the fingerprint image processing means, and
During the remaining time spent on processing by the fingerprint image processing means in the predetermined time, the process of importing the user's fingerprint data registered in advance on the IC card from the two input sections into the storage means, or other input. Since the fingerprint image processing means, the storage means, or the collation means perform processing on the part, a single verification part can process verification requests from a plurality of input parts consecutively or in parallel. By reducing the number of matching units that require checking hardware and are expensive, the fingerprint matching device can be made smaller and lower in cost, and the fingerprint matching process can also be faster.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention, FIG. 2 is a flow chart for explaining the operation of the first embodiment of the present invention, and FIGS. Flowchart for explaining the operation of the second embodiment of the invention, No. 6
The figure is a time chart for explaining the operation of the second embodiment of the present invention. 1.2...Input section, 3.°...Verification section. 4...IC card, 8...card reader, 9...display device, 10...
Prism, 11°...Lighting device, 12...
...TV camera. 13...Input section control device, 14...Verification section control device.

Claims (1)

[Claims] An IC card in which user's fingerprint data is registered, and the IC card.
one or more input units comprising a card reader for reading registered data in the card, a fingerprint detection means for detecting a fingerprint image of a user, and a display means for displaying a contrast state of the fingerprint image; a fingerprint image processing means that determines whether the contrast state of the detected fingerprint image is appropriate and outputs the result to a display means; and the IC read out by the card reader.
a collation unit comprising a storage means for storing fingerprint data in the card and a collation means for collating the fingerprint image determined to be in an appropriate contrast state by the fingerprint image processing means and the fingerprint data stored in the storage means; The verification section is configured such that the fingerprint image processing means performs a series of processing on the one input section at predetermined time intervals, and the storage means performs a series of processing on the one input section at predetermined time intervals. 1. A fingerprint verification device, characterized in that the fingerprint image processing means, storage means, or verification means takes in fingerprint data for one input section, or performs processing for the other input section.