CN104933427A - Embedded finger three-modal characteristic acquisition equipment - Google Patents

Abstract

An embedded finger trimodal feature collection device. It includes a controller, a finger vein module, a knuckle print module, a fingerprint module, a touch screen, a serial port and a network card interface; the controller is respectively connected with the finger vein module, the knuckle print module, the fingerprint module, the touch screen, the serial port and the network card interface. The embedded finger three-modal feature acquisition device of the present invention adopts finger multi-modal biological feature recognition technology, which can make full use of the advantages of each mode of the finger and make up for the shortcomings of the single mode. The primary problem is to obtain clear and stable The multi-modal feature image of the finger, compared with other single-finger feature collection devices, this device has the advantages of small size and strong performance, and it is convenient for synchronous collection of finger veins, knuckle prints and fingerprints, so that the images of the three The fusion provides data support for the research of the three-modal identification algorithm, and also has certain reference significance for the application and promotion of the multi-modal identification system.

Description

An embedded finger tri-modal feature acquisition device

technical field

The invention belongs to the technical field of biometric feature recognition for pattern recognition, in particular to an embedded finger three-mode feature collection device.

Background technique

At present, biometric technology has attracted increasing attention and has become the main direction in the field of identity verification. Although biometric recognition based on a single biometric has achieved rich results, each biometric has more or less defects, especially susceptible to factors such as external environment and damaged biometrics. Single-modal biometric identification technology can no longer effectively meet the actual needs of identification.

Therefore, the biometric identification technology of multimodal features has increasingly become the main direction of biometric identification research. Among them, the finger multi-feature biometric technology characterized by finger veins, knuckle prints and fingerprints can well solve the shortcomings of single-modal biometric technology, but the actual finger feature collection equipment is generally single-modal , most of them adopt the structure of ordinary computer plus external equipment, on the one hand, the practicability is poor, on the other hand, the three-modal feature is not to simply splicing three images together, but to consider the internal correlation of the three, which requires The three modalities must maintain the same posture. If the postures are different, the correlation will become smaller, which will lead to large intra-class differences between images, resulting in unsatisfactory effect of the subsequent feature extraction and recognition algorithms. Therefore, how to solve the problem of synchronous collection of finger trimodal features has become a new task faced by those skilled in the art.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide an embedded finger tri-modal feature collection device.

In order to achieve the above object, the embedded finger three-mode feature acquisition device provided by the present invention includes: a controller, a finger vein module, a knuckle pattern module, a fingerprint module, a touch screen, a serial port and a network card interface; wherein: the controller is respectively connected with the finger vein Module, knuckle pattern module, fingerprint collection module, touch screen, serial port and network card interface are connected.

The controller is an E8 development board with S5PV210 as the core.

The finger vein module is a finger vein collection device, which is composed of a general-purpose USB interface camera and an infrared laser head, wherein the USB camera is equipped with an 850nm infrared narrow-band filter, which is connected to the controller 1 through the USB-Host.

The knuckle pattern module is a knuckle pattern acquisition device, which is composed of 0V3640 camera module and double LED lamps, and is used to collect knuckle pattern images: wherein the 0V3640 camera module is connected to the controller by SSCB interface, and the front of the LED lamp is set Has an infrared filter.

The fingerprint module is a fingerprint collection device, which adopts the ZFM-206 series optical fingerprint module of Hangzhou Zhian Technology Co., Ltd., and is connected to the controller 1 through the USB-Host interface.

The touch screen is an LCD display screen, which is connected to the controller through a cable.

The serial port is an interface circuit connecting the controller with the server, which is a general serial port using the RS-232 standard protocol.

The network card interface is an interface circuit for connecting the controller to a personal computer, and the personal computer is connected to the controller through a network cable.

The embedded finger tri-modal feature acquisition device also includes a housing outside the above-mentioned components and a finger placement platform, wherein the housing is made of black opaque acrylic plastic, and light-blocking materials are pasted on the inner surface. A cooling fan is installed; the finger placement platform is set horizontally inside the housing, which is a transparent acrylic plastic plate; the finger vein module and knuckle pattern module are on the same level and above the finger placement platform, and the fingerprint module is set on the rear side of the finger placement platform .

The embedded finger tri-modal feature acquisition device also includes a 12V2A power supply and a 5V500mA power supply, wherein the former power supply is used for power supply of the controller, cooling fan and double LED lights, and the latter power supply is used for the infrared laser head power supply.

The embedded finger three-modal feature acquisition device provided by the present invention adopts finger multi-modal biological feature recognition technology, which can make full use of the advantages of each mode of the finger and make up for the shortcomings of the single mode. The primary problem is to obtain clear and stable Compared with other single-finger feature collection devices, this device has the advantages of small size and strong performance, and it is convenient for synchronous collection of finger veins, knuckle prints and fingerprints, so that the three The fusion of images provides data support for the research of the three-modal identification algorithm, and also has certain reference significance for the application and promotion of the multi-modal identification system.

Description of drawings

FIG. 1 is a structural block diagram of an embedded finger three-modal feature acquisition device provided by the present invention.

Detailed ways

The embedded finger three-modal feature acquisition device provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the embedded finger three-modal feature acquisition device provided by the present invention includes:

Controller 1, finger vein module 2, knuckle print module 3, fingerprint module 4, touch screen 5, serial port 6 and network card interface 7; wherein: controller 1 is connected with finger vein module 2, knuckle print module 3, and fingerprint acquisition module respectively 4. The touch screen 5, the serial port 6 and the network card interface 7 are connected.

Controller 1 is an E8 development board with S5PV210 as the core, which is the control core of the device;

The finger vein module 2 is a finger vein collection device, which is composed of a general-purpose USB interface camera and an infrared laser head, and is used to collect finger vein images. -Host is connected to the controller 1; the 850nm infrared laser beam emitted by the infrared laser head can shine through the finger to obtain a clear finger vein image;

The knuckle pattern module 3 is a knuckle pattern collection device, which is composed of 0V3640 camera module and double LED lights, and is used to collect knuckle pattern images: the 0V3640 camera module is connected to the controller 1 through the SSCB interface, and is illuminated by the double LED lights. Bright fingers, easy to collect clear knuckle pattern images, an infrared filter is set in front of the LED light to filter out infrared light and prevent the LED light from affecting finger vein imaging;

Fingerprint module 4 is a fingerprint collection device for collecting fingerprint information. This device adopts the ZFM-206 series optical fingerprint module of Hangzhou Zhian Technology Co., Ltd., which can complete various functions such as fingerprint collection, feature extraction, and feature comparison. -Host interface is connected to controller 1;

The touch screen 5 is an LCD display screen, which is used for interaction between the device and the user, and is connected to the controller 1 through a cable.

Serial port 6 is the interface circuit that controller 1 is connected with server, and it is the universal serial port that adopts RS-232 standard agreement, is used for controller 1 to automatically upload the picture information that gathers to server by FTP protocol;

Network card interface 7 is the interface circuit that controller 1 is connected with personal computer, and is used for mounting NFS service, and personal computer is connected with controller 1 through network cable, and imports the program and file cross-compiled into controller 1 through NFS service.

The embedded finger tri-modal feature acquisition device also includes a housing outside the above-mentioned components and a finger placement platform, wherein the housing is made of black opaque acrylic plastic, and light-blocking materials are pasted on the inner surface to prevent Light reflection interferes with the imaging, and a cooling fan is installed inside to prevent the device from overheating and burning out the controller 1 and the infrared laser head; the finger placement platform is horizontally set inside the housing, which is a transparent acrylic plastic plate; finger vein module 2 and The knuckle print module 3 is on the same horizontal plane and above the finger placement platform, and the fingerprint module 4 is arranged on the rear side of the finger placement platform.

The embedded finger tri-modal feature acquisition device also includes a 12V2A power supply and a 5V500mA power supply, wherein the former power supply is used for power supply of the controller 1, cooling fan and double LED lights, and the latter power supply is used for infrared laser head power supply.

The method of using the embedded finger three-modal feature acquisition device provided by the present invention is as follows:

First connect the power supply of this device, then the infrared laser head, double LED lights and cooling fan are automatically turned on, the touch screen 5 automatically enters the collection interface, click the "Preview" button on it, the controller 1 controls the finger vein module 2 and the knuckle pattern module The camera on 3 is turned on and enters the pre-acquisition mode;

Then put the finger to be detected on the finger placement platform naturally, with the back facing up, and touch the finger pulp on the fingerprint module 4. At this time, the user can see the finger vein, knuckle pattern and fingerprint image through the corresponding window on the touch screen 5 , and then click the "collect" button, and the controller 1 controls the finger vein module 2, the knuckle pattern module 3 and the fingerprint module 4 to collect clear images simultaneously.

Finally, connect the device to the server through serial port 6 and the serial port cable, and then click the "FTP" button to enter the FTP service setting interface. After configuration, click the "Upload" button, and the controller 1 will automatically upload the above-mentioned Images are automatically uploaded to the server. Then, click the "Close" button, the camera is turned off, and the process of collecting the three-modal feature information of the finger by the whole device is completed.

Claims (10)

1. An embedded finger three-modal feature acquisition device, characterized in that: the embedded finger three-modal feature acquisition device comprises: a controller (1), a finger vein module (2), a knuckle pattern module ( 3), fingerprint module (4), touch screen (5), serial port (6) and network card interface (7); wherein: controller (1) is connected with finger vein module (2), knuckle pattern module (3), fingerprint The acquisition module (4), the touch screen (5), the serial port (6) and the network card interface (7) are connected. 2. The embedded finger three-mode feature acquisition device according to claim 1, characterized in that: the controller (1) is an E8 development board with S5PV210 as the core. 3. The embedded finger three-modal feature acquisition device according to claim 1, wherein the finger vein module (2) is a finger vein acquisition device, which is composed of a universal USB interface camera and an infrared laser head, wherein The USB camera is equipped with an 850nm infrared narrow-band filter, which is connected to the controller (1) through the USB-Host. 4. The embedded finger three-modal feature acquisition device according to claim 1, characterized in that: the knuckle pattern module (3) is a knuckle pattern acquisition device, consisting of an 0V3640 camera module and double LED lights : wherein the 0V3640 camera module is connected to the controller (1) through an SSCB interface, and an infrared filter is arranged in front of the LED light. 5. The embedded finger three-modal feature acquisition device according to claim 1, characterized in that: the fingerprint module (4) is a fingerprint acquisition device, using the ZFM-206 series of optical fingerprints of Hangzhou Zhian Technology Co., Ltd. The module is connected with the controller (1) through the USB-Host interface. 6. The embedded finger three-mode feature acquisition device according to claim 1, characterized in that: the touch screen (5) is an LCD display screen, connected to the controller (1) through a cable. 7. The embedded finger three-mode feature acquisition device according to claim 1, characterized in that: said serial port (6) is an interface circuit for the controller (1) to be connected to the server, and it adopts the RS-232 standard A common serial port for the protocol. 8. The embedded finger three-mode feature acquisition device according to claim 1, characterized in that: the network card interface (7) is an interface circuit that the controller 1 is connected to a personal computer, and the personal computer is connected to the controller by a network cable (1) connected. 9. The embedded finger three-modal feature acquisition device according to claim 1, characterized in that: the embedded finger three-modal feature acquisition device also includes a housing outside the above-mentioned components and a finger placement platform, The housing is made of black opaque acrylic plastic, the inner surface is pasted with light-shielding material, and a cooling fan is installed inside; the finger placement platform is horizontally arranged inside the housing, which is a transparent acrylic plastic plate; the finger vein module (2 ) and the knuckle print module (3) are on the same horizontal plane and above the finger placement platform, and the fingerprint module (4) is arranged on the rear side of the finger placement platform. 10. The embedded finger tri-modal feature acquisition device according to claim 1, wherein the embedded finger tri-modal feature acquisition device also includes a 12V2A power supply and a 5V500mA power supply, wherein the former The power supply is used for the power supply of the controller (1), cooling fan and double LED lights, and the latter power supply is used for the power supply of the infrared laser head.