WO2018090402A1

WO2018090402A1 - Solution for increasing user number for palm vein recognition

Info

Publication number: WO2018090402A1
Application number: PCT/CN2016/108459
Authority: WO
Inventors: 徐胜维
Original assignee: 常熟安智生物识别技术有限公司
Priority date: 2016-11-16
Filing date: 2016-12-03
Publication date: 2018-05-24
Also published as: CN108074304A

Abstract

A solution for increasing a user number for palm vein recognition. The solution comprises a power supply, a power supply drive circuit, a palm vein acquisition circuit, an SD card, an SD card interface circuit, a Cortex A8-above ARM processor, an LCD display circuit, an LCD display screen, an audio output circuit, a speaker, an RS232/485 communication conversion circuit, and an access control device. The power supply is connected to the Cortex A8-above ARM processor via the power supply drive circuit. The palm vein acquisition circuit is connected to the Cortex A8-above ARM processor. The SD card is connected to the Cortex A8-above ARM processor via the SD card interface circuit. The Cortex A8-above ARM processor transmits video intercom information to the LCD display screen via the LCD display circuit, outputs audio notification by means of the audio output circuit and the speaker, and is connected to a CPU card reader via the RS232/485 conversion circuit. The access control device controls a door to open or close. The Cortex A8-above ARM processor controls palm vein recognition and logic communication between the circuits.

Description

A scheme for expanding the number of palm vein recognition users

[0001] The present invention relates to a solution for expanding the number of palm vein recognition users, and belongs to the field of third generation biometric technology.

Background technique

[0002] CPU card: Also called a smart card, the integrated circuit in the card has a microprocessor CPU, a storage unit, and a chip operating system COS. The CPU card with COS is equivalent to a microcomputer, which not only has the data storage function, but also has the functions of command processing and data security protection. CPU card can be used for finance, insurance

, traffic police, government industry and other fields, with large user space (can store palm vein data), fast reading speed, support for one card multi-use, etc., and has been certified by the People's Bank of China and the national ministries. technical problem

[0003] In the prior art, most of them adopt card management, and the more advanced one adopts biotechnology for verification management, and the palm vein recognition biotechnology has just developed in this field. Palm vein recognition is a kind of vein recognition. It belongs to biometric identification. The palm vein recognition system first obtains the palm vein distribution map through the vein recognition instrument. The characteristic value is extracted from the palm vein distribution map according to the special comparison algorithm, and obtained by the infrared CCD camera. The image of the palm, the dorsal vein of the hand, stores the digital image of the vein in a computer system, and stores the feature values. The vein is compared to the sputum, and the venous map is taken to extract the eigenvalues. The advanced filtering, image binarization, and refinement methods are used to extract the features of the digital image, and the venous feature values stored in the host are compared, and a complex matching algorithm is adopted. The vein characteristics are matched to identify individuals and confirm their identity.

[0004] After the palm vein is used for identity authentication, the image features of the palm vein are acquired, which refers to the characteristics of the living body. In this system, the non-living palm is not able to obtain the characteristics of the vein image, and thus cannot be identified, and thus cannot be faked. After authentication with the palm vein, the image of the vein image inside the palm is acquired, not the image feature of the palm surface. Therefore, there is no recognition obstacle due to damage, abrasion, dryness or too wet of the palm surface. The palm vein is used for identity authentication, and the image of the palm vein is obtained. The palm does not need to be in contact with the device, and the identification can be completed by gently releasing it. This way there is no hand connection The unsanitary problems of the device and the surface features of the palm may be duplicated, and the psychological discomfort that is considered as the object of examination is avoided, and the same is not recognized by the dirt. In the palm vein, because the vein is located inside the palm, the influence of external factors such as temperature is negligible, and it is suitable for almost all users. User acceptance is good. In addition to the need to make direct contact with the scanner surface, this non-invasive scanning process is both simple and natural, reducing the user's resistance to fear of hygiene or use. Because of the previous characteristics of living body recognition, internal features and non-contact, it is difficult to forge the user's palm vein features. Therefore, the palm vein recognition system has a high safety level and is particularly suitable for use in places with high safety requirements. However, the following problems still exist in the prior art: (1) It belongs to the internal physiological characteristics, does not wear out, is difficult to forge, and has high safety. (2) The vascular characteristics are usually more obvious, easy to identify, and good in anti-interference. (3) Non-contact measurement can be realized, which is hygienic and easy to accept for users. (4) It is not easily affected by surface scratches or oil stains. The disadvantages of the above techniques are: The collection equipment has special requirements, the design is relatively complicated, and the manufacturing cost is high.

Problem solution

Technical solution

[0005] In order to improve the safety factor of an access control system, the present invention proposes a scheme for expanding the number of palm vein recognition users.

The technical solution adopted by the present invention.

[0007] A solution capable of expanding the number of palm vein recognition users, including a power source, a power source driving circuit, a palm vein collecting circuit, an SD card, an SD card interface circuit, a cortex

A8 or more ARM processor, LCD display circuit, LCD display, audio output circuit, speaker, RS23 2/485 communication conversion circuit, access controller, power supply through the power drive circuit and Cortex A8 and above ARM processor, palm vein acquisition circuit Connected to the Cortex A8 and above ARM processor, the SD card is connected to the Cortex A8 and above ARM processor through the SD card interface circuit, and the Cortex A8 and above ARM processor transmits the intercom visual information to the LCD display through the LCD display circuit, through the audio output. The circuit transmits the audio prompt through the speaker, connects to the CPU card reader through the RS232/485 conversion circuit, and the access controller controls the door. The cortex A8 and above ARM processor controls the palm vein identification and the logic communication between the circuits. The cortex A8 or higher ARM processor is equipped with a near-infrared light led camera. The visitor performs image extraction and digitization of the palm vein. The palm vein recognition is performed according to the following steps: [0008] The first step, training and projecting the palm vein image, obtaining five candidate palm vein images by matching the classifier, and the best image features obtained by the training

[0009] In the second step, the best test image is found in the five candidate palm vein images in the classifier:

[0010] a, loading all palm vein image training sets, corresponding to the candidate palm vein;

[0011] b using a fusion palm vein to describe the deformation of each palm vein extracted from the training set;

[0012] c, extracting the deformation of the palm vein test image, expressed as Dq;

[0013] d, using Dq to match the previous five candidate palm vein images, find the number of matching key points

[0014] In the third step, the verification criterion is determined by matching the number of key points, and the palm vein descriptor with the largest number of matching points is set as the most probable item, and the target palm vein image is obtained by feature matching.

[0015] Then, through the CPU card reader, the palm vein characteristic data is stored on the CPU card, each time of recognition

, reading the palm vein feature data from the CPU card, so that the number of users who can recognize the palm vein infinitely

, to ensure that the palm vein recognition adapts to various identification sites.

[0016] Preferably, the power module comprises: 12V DC power supply for the access controller circuit system; and a fire alarm expansion module: when the access control system is damaged or damaged, the access controller sends the alarm information to the security management Center, or reminded by fire alarm; Ethernet interface: responsible for remote network control information transmission, while providing downlink interface for smart home gateway; door magnetic lock module: function magnetic lock according to the closed and closed state of the relay And in the specified day to detect the operating state of the magnetic lock; I / O data interface: read the cortex A8 above ARM processor palm vein identification information, transmitted to the access controller for processing; LED module: display access control The operating state of the electromagnetic door lock, displaying the identification information and the status of the data and the network; the voice module: issuing a voice reminder message to the entering and leaving personnel according to the palm vein recognition result and the access control information; button interface: trick request and trick confirmation Button operation, sending high and low level signals through I/O interface; RS485 interface: through RS2 The 32/485 communication adapter communicates with the cortex A8 and above ARM processors.

[0017] Preferably, the audio circuit mainly comprises audio input and output processing circuits. Since the audio output signal is an analog signal with a voltage of a few ten millivolts, the gain adjustment is first performed by the power amplifier circuit, and the digital audio signal converted by the A/D conversion circuit is transmitted to the control chip.

[0018] Preferably, cortex

The voltage of the ARM processor above A8 is 5V through the power adapter, and the 5V voltage is passed through the low dropout voltage. The voltage regulator AS1117AR-3.3V is divided and the voltage is regulated by a capacitor to ensure a stable 3.3V voltage for each component and interface and 1.8V and 2.5V for the camera module.

[0019] Preferably, the user triggers the camera to transmit its palm vein information to the control terminal, and finally triggers the access control module through the control terminal to complete the trick operation.

Advantageous effects of the invention

Beneficial effect

[0020] The method of the CPU card of the invention adopts the palm vein biometric identification technology, can accurately identify the user identity, and the reaction speed is within 2s, and can expand the number of users indefinitely, can adapt to places with a large number of people, and improve the palm Accuracy and efficiency of vein recognition.

Brief description of the drawing

DRAWINGS

1 is a schematic structural diagram of a terminal according to the present invention;

2 is a schematic structural view of a PC card issuer.

Embodiments of the invention

[0023] At present, domestic banks, whether they are debit cards or credit cards, have more and more financial card theft due to various reasons such as the card being copied. If the palm vein is combined with the CPU card, it can basically Eliminating the theft of credit cards is also extremely beneficial to the development of financial cards! The specific implementation method is that the bank uses the card issuer, uses a separate palm vein encryption key, and issues a C P U card with its own palm vein data to the individual user, and combines the palm vein information with the personal bank information. In the process of use, the individual uses it on the terminal. The individual first swipes the card, reads the information on the relevant card into the terminal, then releases the hand to identify the palm vein, and then can perform related financial operations. Because the palm vein recognition technology is difficult to replicate, the program can effectively curb the occurrence of financial fraud and improve the safety factor of the financial industry.

Claims

Claim

[Claim 1] A solution capable of expanding the number of palm vein recognition users, comprising: a power source, a power source driving circuit, a palm vein collecting circuit, an SD card, an SD card interface circuit, a Cortex A8 or higher ARM processor, and an LCD display Circuit, LCD display, audio output circuit, speaker, RS232/485 communication conversion circuit, access controller, power supply is connected to the orbit A8 and above ARM processor through the power drive circuit, and the palm vein acquisition circuit is connected to the Cortex A8 and above ARM processor. The SD card is connected to the Cortex A8 and above ARM processor through the SD card interface circuit. The Cortex A8 or higher ARM processor transmits the intercom visual information to the LCD display through the LCD display circuit, and the audio prompt is transmitted through the speaker through the audio output circuit. The RS232/385 conversion circuit is connected to the CPU card reader, the access controller controls the door, the cortex A8 and above ARM processor controls the palm vein identification and the logic communication between the circuits, and the cortex A8 and above ARM processor configuration Camera, palm vein image extraction and digitization for residents and visitors deal with.

[Claim 2] A solution for expanding the number of palm vein recognition users according to claim 1, wherein: the power module: providing 12V DC power for the access controller circuit system; Ethernet interface: Responsible for remote network control information transmission; door magnetic lock module: according to the closed and closed state of the relay, the magnetic lock is activated, and the operating state of the magnetic lock is detected in the specified time; I/O data interface: read Take the cortex A8 and above ARM processor palm vein identification information, transfer to the access controller for processing; according to the palm vein recognition results and access control information, send voice reminder information to the in and out personnel; send high and low level signals through the I / O interface; RS485 interface: Data communication with Cortex A8 and above ARM processor through RS232/485 communication adapter.

[Claim 3] A scheme for expanding the number of palm vein recognition users according to claim 1, wherein: the audio circuit mainly includes audio input and output processing circuits. Since the audio output signal is an analog signal with a voltage of a few ten millivolts, the gain adjustment is first performed by the power amplifier circuit, and the digital audio signal converted by the A/D conversion circuit is transmitted to the control chip.

[Claim 4] A scheme for expanding the number of palm vein recognition users according to claim 1, The sign is: cortex

The voltage of the ARM processor above A8 is 5V through the voltage converter of the power adapter, and the voltage of 5V is obtained by the voltage divider of the low-dropout voltage regulator AS1117AR-3.3V, and the voltage is regulated by the capacitor to ensure the components. The interface provides a stable 3.3V voltage and 1.8V and 2.5V for the camera module.

[Claim 5] The card issuer is a PC computer. The RS232 is connected to the CPU card reader, and the corresponding palm vein information can be written to the CPU card, and the same encryption key is used with the terminal. The invention uses the palm vein recognition technology, has the non-contact identity for verification, has high safety performance and is convenient to use, the ARM board has high performance, high reliability, low energy consumption, and the device is easy to maintain, and the palm vein data is encrypted and stored in the CPU card. On, will not limit the number of users and improve security. At the same time, the security performance of the C P U card is also better in the current I C card, which increases the security of the overall system.