CN1067478C

CN1067478C - Finger-print card

Info

Publication number: CN1067478C
Application number: CN96120412A
Authority: CN
Inventors: 王文渊; 阎平凡; 卓晴
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 1996-10-25
Filing date: 1996-10-25
Publication date: 2001-06-20
Anticipated expiration: 2016-10-25
Also published as: CN1155128A

Abstract

The present invention relates to a fingerprint card. The fingerprint card comprises a fingerprint shooting instrument, an FPC-96 board, a microcomputer and a reader/writer, wherein the fingerprint shooting instrument is used for obtaining fingerprints; the FPC-96 board is used for shooting, processing, recognizing, etc. The fingerprints; the microcomputer is used for running software of the FPC-96 board; the reader/writer is used for carrying out reading/writing operation of the content of the fingerprint card. The present invention combines a plurality of electronic equipment, such as a computer, a network, an intelligent card, etc., optoelectronic technology, image processing, pattern recognition and database management technology, fully utilizes the advantages of high security, convenient carrying, etc. of the fingerprint card, reduces farthest cash transaction, achieves multiple functions by one card and has wide application fields.

Description

The finger-print card identification system

The present invention relates to a kind of finger-print card identification system, belong to the Computer Recognition Technology field.

Along with developing rapidly of market economy, various credits card, cash card etc. also emerge like the mushrooms after rain, they to the flourish the market, boost consumption, accelerate the withdrawal of currency from circulation and played effect difficult to the appraisal, for people's life provides a great convenience.In developed country, the amount of holding has become the scale of weighing national economic development speed or prosperity degree per capita.What can expect is that the enforcement of China's " three gold medals " engineering will greatly promote popularizing of this electronic money and development.At present, the magnetic card of China is used and is started to walk modal banking procedure where deposits and withdrawals are processed at any branch bank as bank, card phone etc.Because magnetic card is easily forged, memory capacity is little, and poor stability must be furnished with safety practices such as strict checking, mandate and just can prevent false claiming and wholesale malicious overdraft in some occasion.In addition, in order to use this class card, the holder must keep password firmly in mind, just in case lost card, the possibility that also is falsely taken in addition.

Confirm already on the science: people's fingerprint is constant throughout one's life, and does not have two people's fingerprint identical in the world, thereby can be fingerprint as the reliable basis that discriminates one's identification.In the past, discerned fingerprint with the special messenger always, not only time-consuming, effort, and also workload is quite big.In recent years, because the development of computer technology, ic manufacturing technology and correlation theory, carrying out fast and accurately with computing machine, fingerprint recognition and management have become possibility.

The objective of the invention is to design a kind of finger-print card identification system, fingerprint is existed on the card, sign as the identification identity, and the management and the image processing system of design finger-print card, integrate various electronic such as computing machine, network, smart card and photoelectric technology, image processing, pattern-recognition, database management technology.Make full use of advantages such as finger-print card strong security, " easy to carry ", reduce money transaction to greatest extent, and realize numerous functions, provide advanced equipment and means for realizing finger-print card type " electronic money " with a card.

The finger-print card identification system of the present invention's design comprises fingerprint picked-up instrument, and this fingerprint picked-up instrument is made up of prism, light source and video camera etc.Finger-print card also comprises the FPC-96 plate of work such as the picked-up that is used to finish fingerprint, processing, identification, be used to the read write line that moves the microcomputer of software on the FPC-96 plate and be used for the content on the finger-print card is carried out read-write operation, the FPC-96 plate is inserted in the slot of microcomputer, with the PC concurrent working, fingerprint picked-up instrument is directly linked on the FPC-96 plate, the finger-print card read write line is linked on the PC by serial ports, and finger-print card is read and write by this read write line; FPC-96 plate wherein is by the DSP unit, the image acquisition unit, the I/O interactive unit of PC bus driver interface unit and PC and FPC-96 plate is formed, fingerprint picked-up instrument in the recognition system collects finger print image, this fingerprint signal input system, deliver to sync separator through amplifier, relevant signal after the separated in synchronization is sent into the address signal collector, produce the address signal of gathering image, meanwhile, fingerprint signal after amplifying also is sent to A/D converter, so that form digital finger print image signal, it is delivered to storer, can use for follow-up processing after the storage, by the I/O mouth, PC can read this pictorial data, wherein:

One, DSP unit, it comprises:

1, in order to move the central processing unit U0 of finger print image handling procedure.

2, in order to deposit the data-carrier store U105-U104 of digital image (sending here) by the image acquisition unit.

3, in order to deposit, to move various handling procedures and to deposit image processing result's program storage U101-U104.

4, in order to U201, the U202 of isolated data bus; The U203, the U204 that isolate address bus, and U211, U212 are the address mapping isolating device.

5, in order to produce the U205 of isolator steering logic.

Two, image acquisition unit, it comprises:

1, in order to finger print image is absorbed the sync separator U501 that vision signal that instrument sends here is separated.

2, the timer U509 in order to the horizontal-drive signal after the separated in synchronization is postponed to handle.

3, the buffer amplifier U507 that isolates of the picture intelligence that refers to device in order to ask in the future and carry out analog-to-digital A/D transducer U504.

4, in order to storer U213, the U214 of memory image frame signal.

5, the circuit U 207 in order to arbitrate control.

6, in order to produce U502, the U503 of image acquisition address signal.The square wave that crystal oscillator U505 produces can obtain the required signals such as Dot Clock of image acquisition behind the U506 frequency division.

7, in order to supply with device V501, V502 and the V503 of the required power supply of image acquisition circuit.

8, in order to produce the crystal oscillator U1 of the required clock of A/D conversion.

Three, PC bus driver interface comprises:

1, PC AT-bus 62 line slot U401.

2, PC AT expansion bus 36 line slot U402.

3, the bus buffer in order to provide PC system bus and FPC-96 integrated circuit board external bus to isolate.Wherein, U406, U407 are the address bus isolator; U403, U404, U405, U409 are the memory data bus isolator.U301, U302, U311 are the I/O data bus isolator.U408 is a storer isolation control logic maker; U412 is PC 16 bit bus controllers.

Four, the I/O interactive portion of PC and FPC-96 plate, it comprises:

1, eight state input ports of PC U303; Sixteen bit control delivery outlet U304, U305 and sixteen bit data input port U306, U307; Sixteen bit data output U308, U309.

2, eight of the DSP sheet control mouthful U206 and corresponding sixteen bit numeral input/output port.

3, in order to produce the U209 of synchronous handshake.

4, in order to produce the U411 of input/output space (data-bus width conversion and) isolated controlling.

The finger-print card identification system of the present invention design has that memory capacity is big, safe, long service life, be easy to carry and be easy to realize advantage such as one card for multiple uses.Simultaneously, antimagnetic, electrostatic prevention, the antijamming capability of this card are stronger, and the characteristics that himself have also are that magnetic card is incomparable.The operation of this finger-print card is very simple, directly perceived.The user is as long as insert read write line to finger-print card according to prompting, and finger is lain on the fingerprint picked-up instrument, and system can identify user's identity soon automatically, thereby need not training and promptly can use.Be applied as example with bank.Can finish depositor's the work of opening an account in several seconds.The user withdraws the money also only needs the time in several seconds, and the operation of finishing comprises authentication and step on card, file etc., and this has just greatly improved the work efficiency of bank.In addition, the user need not remember password, also needn't worry losing of card, uses not only convenient and reliablely, and overcome the distrust of client to electronic money that hold.Thereby very advantageous has boundless application prospect in the long run.

Description of drawings:

Fig. 1 is a theory diagram of the present invention.

Fig. 2 is the structural representation that fingerprint used among the present invention absorbs instrument.

Fig. 3, Fig. 4 and Fig. 5 are the circuit theory diagrams of DSP unit in the image processing system.

Fig. 6 and Fig. 7 are the circuit theory diagrams that PC and FPC-96 plate carry out the I/O interactive unit in the image processing system.

Fig. 8 is the circuit theory diagrams of PC bus driver interface unit in the image processing system.

Introduce content of the present invention in detail below in conjunction with accompanying drawing.

Fig. 2 is the structural representation of the used fingerprint picked-up instrument of the present invention.Among Fig. 2, the 1st, optics prism, the 2nd, video camera, the 3rd, planar light source, the 4th, fingerprint carina.The function of finger print image picked-up instrument is the grey scale change that the elevation information of fingerprint protuberance is converted into image, is translated into TV signal again and delivers to the finger print image disposal system.Its principle of work as shown in the figure.The planar light that light source 3 sends projects the upper surface a of prism 1, because the fingerprint carina partly is close to prism facets, it has absorbed the light of penetrating, and the total reflection of fingerprint ditch part light, this has just formed chequered with black and white finger print image, through CCD gamma camera 2, just make finger print image become TV signal and deliver to image processing system.

The FPC-96 plate comprises the DSP unit, image acquisition unit, the I/O interactive unit of PC bus driver interface unit and PC and FPC-96 plate.

In order to give full play to the high speed characteristics of High Performance DSP unit, designed a strict high speed processing local environment of isolating specially for it, and used the speed of relative section to mate mutually.The present invention makes the addressable local memory of DSP, and the picture frame storer also can pass through condition I/O interface and PC communication.In addition, PC both can carry out certain control to the integrated circuit board function, and the local memory space of DSP, picture frame storer etc. are carried out read-write operation, also can carry out communication by condition I/O interface and DSP, thereby the parallel on-line of having realized the two is handled.

DPS (U0) by Fig. 3, program storage U101, the U102 of Fig. 4, U103, U104, and data-carrier store U105, U106, U107, U108 have constituted above-mentioned high speed processing local environment, this local environment does not have code translator, guaranteeing minimum signal delay, thereby the speed of storer and CPU is given full play to.The electrical isolation of local environment and external unit is to be finished by the following device of Fig. 5: U201, U202 isolated data bus, and U203, U204, U211, U212 isolate address bus.Like this, both can make DSP visit the picture frame storer that is positioned on the external bus, can make the local memory of PC visit DSP again.Address bus, the isolated controlling of data bus is realized by U205 (GAL16V8).

U213 among Fig. 5, U214 have formed the picture frame storer, in order to deposit the pictorial data of partly being sent here by image acquisition.Because its address bus links to each other by the local bus of above-mentioned isolator with the high-speed dsp environment with data bus, therefore can be considered on the external bus that has hung over DSP.The page address that the picture frame storer is mirrored DSP is taken place by U206 (74LS573), and the page address of mirroring PC is produced by U304.Visit to the picture frame storer is arbitrated by U207.U208 is pull down resistor row, and it mainly acts on is that high position data to input/output space shields.

In this part, the operation of DSP (U0) control program, the finger print image that image acquisition is partly sent here carries out binaryzation, refinement, extract various processing such as feature, and relevant data with exist the imagery pack feature in fingerprint database or the finger-print card to compare, and then card holder's identity is made discriminating.

The image acquisition of Fig. 8 part is by isolated amplifier U507, sync separator U501, A/D transducer U504, and chronotron U509 forms.Gather required Dot Clock signal and produce, and the address signal of gathering is supplied with by U502, U503 by U505, U506.The effect of this part is that the image that fingerprint picked-up instrument obtains is become the digital image signal that can be operated by the DSP unit.Its course of work is as follows:

After the compound composite video signal VINP of positive polarity black and white entered system, through impedance matching, the one tunnel delivers to the U501 sync separator carried out separated in synchronization, to produce horizontal-drive signal, vertical synchronizing signal and parity field signal.Relevant signal is sent into U502, U503 just can produce the address signal of gathering image.Meanwhile, also VINP is added to U507 and cushions amplification, behind diode limiting, deliver to U504 and carry out the A/D conversion again, this has just produced the digital image data of gathering.This signal is delivered to data-carrier store U105-U108 and program storage U103, U104 among Fig. 4 through data bus, will handle image, finally obtain the identification result of fingerprint.

V501 among Fig. 8, V502, V503 are the analog powers of image acquisition part, and main effect is to reduce power supply noise, is favourable to improving the quality of gathering image.

U505 and U506 are used to produce the Dot Clock of image acquisition and A/D data and various signals such as write.

The circuit of Fig. 6 and Fig. 7 is mainly used in the interface of realizing the PC bus driver and PC and FPC-96 plate and carries out mutual various functions.

For realizing the parallel running of PC and FPC-96 plate, the external bus of PC system bus and plate is isolated.Wherein, U406, U407 are that address bus is isolated, and U403, U404, U405 are that memory data bus is isolated.U408 is a storer isolation control logic maker.U301, U302, U311 isolate for the I/O data bus, and U412 is the total line traffic control in PC16 position.

The circuit of Fig. 6 realizes that mainly the condition data between PC and FPC-96 plate reaches integrated circuit board control alternately.Wherein, U303 is eight state input ports, can be with condition I/O information, and image acquisition synchronizing information etc. feeds back to PC.U304, U305 have formed 16 control output outputs to latch the control information that PC sends.Decoding of PC I/O port and isolation control logic are realized by U411.

In addition, the U2 among Fig. 3 is a JTAG artificial head interface.U311 among Fig. 6 and the U409 among Fig. 7 are for adapting to 8 isa bus designs.Can omit the microcomputer more than 286.

The key technical indexes of the present invention is that the fingerprint identity is differentiated:

False rejection rate:＜0.002

False acceptance rate:＜0.0000001

Processing time:＜3 seconds (to general fingerprint)

Read-write ISO7816-1, the IC-card of 2,3 standards, these card data can be preserved more than 10 years and can be write, and wipe more than 100,000 times.

Security is good: native system can be provided with the tier-3 supervisor, and finger-print card is only effective to the card holder who authorizes, and all the other any having no right per capita use.If lose, only need to lead a card in addition to relevant hair fastener part, can continue to use.

User interface close friend: system interface has adopted Chinese demonstration, push-botton operation, and be furnished with bright-coloured picture, make the interface vividly flexible, the operation intuitive and convenient.

Data security is good: the finger print image that is absorbed, only be retained on the IC-card, and do not keep finger print data in the system, and to writing all data of finger-print card, system all carries out reliable encryption.In addition, also can deposit fingerprint in management system simultaneously, the foundation that identity is differentiated during as long-range issue an order, file and the contact of silver-colored account according to user's requirement.

Flexible use-pattern: the present invention can be used for unit or multi-user.Good at communication environment, promptly in the place that the communication facilities and the network equipment are arranged, but also networking, thus given play to bigger effect.

Portable good, extendability is strong: native system can run on multiple PC and compatible thereof.Both can be used for Windows operating system and also can be used for XNIX operating system.To already present system (as bank, PMS etc.), can easily native system be moved into wherein, thus can make full use of original equipment and system, thereby small investment, be easy to realize.In addition, also can develop the application system of various reality according to user's demand.

Main application fields of the present invention has:

Financial sector: can satisfy the high request of present bank, replace client password, signature in the existing financial sector etc. to security, confidentiality.

Hotel, restaurant's service system: available finger-print card makes gate control system, electronic purse system and finger-print card inquiry system, settlement system etc.

Gate control system:

The shopping in market big or middle and inventive system: as electronic money, can make things convenient for the user with finger-print card, make the user not have the trouble and worry of " losing money ", " losing card ", also can accelerate the turnover of funds in market, improve the market work efficiency at market shopping.

The work attendance check-in system:

Certificate management system: the function such as distribution, identification, modification, registration, statistics of mainly finishing various certificates.Because the finger-print card capacity is bigger,, can't palm off owing to finger print information again, so can bring into play the function of certificate better except that writing name, sex, the age, also can adding the information relevant such as nationality, marriage, occupation, schooling, work unit with certificate.

Automatic fare collection system.

In a word, application of the present invention is very wide, and all places that safety, confidentiality are had relatively high expectations can be adopted.

Claims

1, a kind of finger-print card identification system, comprise fingerprint picked-up instrument, fingerprint picked-up instrument is made up of prism, light source and video camera, it is characterized in that also comprising the FPC-96 plate of the picked-up that is used to finish fingerprint, processing, identification, the read write line that is used to move the microcomputer of software on the FPC-96 plate and is used for the content on the finger-print card is carried out read-write operation; The FPC-96 plate is inserted in the slot of microcomputer, and with the PC concurrent working, fingerprint picked-up instrument is directly linked on the FPC-96 plate, and the finger-print card read write line is linked on the PC by serial ports, and finger-print card is read and write by this read write line; Described FPC-96 plate is by the DSP unit, the image acquisition unit, the I/O interactive unit of PC bus driver interface unit and PC and FPC-96 plate is formed, fingerprint picked-up instrument in the recognition system collects finger print image, this fingerprint signal input system, deliver to sync separator through amplifier, relevant signal after the separated in synchronization is sent into the address signal collector, produce the address signal of gathering image, meanwhile, fingerprint signal after amplifying also is sent to A/D converter, so that form digital finger print image signal, it is delivered to storer, can use for follow-up processing after the storage, by the I/O mouth, PC can read this pictorial data, wherein:

One, DSP unit, it comprises:

(1). in order to the central processing unit U0 of operation finger print image handling procedure;

(2). in order to deposit the data-carrier store U105-U104 of the digital image of sending here by the image acquisition unit;

(3). in order to deposit, to move various handling procedures and to deposit image processing result's program storage U101-U104;

(4). in order to U201, the U202 of isolated data bus; The U203, the U204 that isolate address bus, and U211, U212 are the address mapping isolating device;

(5). in order to produce the U205 of isolator steering logic;

Two, image acquisition unit, it comprises:

(1). in order to finger print image is absorbed the sync separator U501 that vision signal that instrument sends here is separated;

(2). in order to the timer U509 that the horizontal-drive signal after the separated in synchronization is postponed to handle;

(3). the buffer amplifier U507 that the picture intelligence that refers to device in order to ask for is in the future isolated and carry out analog-to-digital A/D transducer U504;

(4). in order to storer U213, the U214 of memory image frame signal;

(5). in order to the circuit U 207 of arbitrating control;

(6). in order to produce U502, the U503 of image acquisition address signal.The square wave that crystal oscillator U505 produces can obtain the required signals such as Dot Clock of image acquisition behind the U506 frequency division;

(7). in order to supply with device V501, V502 and the V503 of the required power supply of image acquisition circuit;

(8). in order to produce the crystal oscillator U1 of the required clock of A/D conversion;

Three, PC bus driver interface comprises:

(1) .PC machine AT-bus 62 line slot U401;

(2) .PC machine AT expansion bus 36 line slot U402;

(3). in order to the bus buffer that provides PC system bus and FPC-96 integrated circuit board external bus to isolate, wherein, U406, U407 are the address bus isolator; U403, U404, U405, U409 are the memory data bus isolator.U301, U302, U311 are the I/O data bus isolator, and U408 is a storer isolation control logic maker; U412 is PC 16 bit bus controllers;

Four, the I/O interactive portion of PC and FPC-96 plate, it comprises:

(1) eight state input ports of .PC machine U303; Sixteen bit control delivery outlet U304, U305 and sixteen bit data input port U306, U307; Sixteen bit data output U308, U309;

(2) eight of the .DSP sheet control mouthful U206 and corresponding sixteen bit numeral input/output port;

(3). in order to produce the U209 of synchronous handshake;

(4). ask the U411 of (data-bus width conversion and) isolated controlling in order to produce the I/O sky.