CN104636731B - Authentication device combining finger vein recognition with wrist vein recognition and fingernail recognition - Google Patents

Abstract

The invention discloses an authentication device combining finger vein recognition with wrist vein recognition and fingernail recognition. The authentication device is characterized by comprising a finger vein feature acquisition device, a fingernail feature information acquisition device and a wrist vein feature information acquisition device; the three devices are arranged on a table body side by side, and authentication is performed by utilizing a matched group of three kinds of feature information acquired by the devices. The accuracy and the reliability of the identity authentication in the security field can be greatly enhanced by the authentication device.

Description

A combination of finger vein recognition, wrist vein recognition and nail recognition authentication device

technical field

The present invention relates to a technical field of identification and authentication using biometric features, in particular to an authentication device and authentication method that combines finger vein recognition, wrist vein recognition, and fingernail recognition.

Background technique

With the increasingly stringent requirements for the security of personal items, internal networks, building passages, the Internet and even e-commerce, the demand for identity authentication technology has become more and more urgent. Biometric technology is safe and convenient identification Among them, fingerprint recognition technology is currently the most convenient, reliable, non-invasive and technically mature biometric technology solution. However, fingerprint identification technology itself also has defects: for example, some people or certain groups have very little fingerprint feature information, which cannot meet the requirements for filing; in addition, the criminal fingerprint database of automatic fingerprint identification system is widely used in global judicial practice. It makes people wary of it; also, every time a fingerprint is used, the user's fingerprints will be left on the fingerprint collector, and these fingerprints may be used to copy fingerprints. In the prior art, common biometric identification technologies include, for example, fingerprint identification and face recognition. Fingerprint identification will be subject to many restrictions. Sudden changes in finger skin will affect the effect of fingerprint identification. In addition, fingerprints of some people or certain groups Because there are few features, it is difficult to image, and the accuracy is affected by the wear and tear of fingerprints or wrist contamination; in addition, the shape of the face is very unstable, and people can produce many expressions through changes in the face. In addition, face recognition is also affected by lighting conditions (such as day and night, indoors and outdoors, etc.), many coverings on the face (such as masks, sunglasses, hair, beards, etc.) , age and other factors. There is not much difference between different individuals in face recognition. All faces have similar structures, and even the structural shapes of facial organs are very similar, which is unfavorable for using faces to distinguish human individuals.

The finger vein authentication technology developed on the basis of the above-mentioned biometric identification technology has begun to appear in recent years. It is a new biometric identification technology that uses the vein distribution image in the finger for identification. There is little or no contact during identification, and there is no danger of the surface features of the finger being maliciously copied by a third party; the system acquires the features that exist only when the finger is alive, and the non-living finger cannot obtain the vein image feature, thus also It cannot be faked, but the finger veins may still change with age and physiological changes, and the permanent has not been confirmed. Although the possibility is small, there is still the possibility that the registration cannot be successful. Therefore, judging from the current authentication method, the authentication degree is not high, which leads to insecurity or other problems. Moreover, the damage, wear, dryness or too wetness of the finger surface will also cause identification obstacles, which will affect the accuracy and accuracy of authentication.

Contents of the invention

The present invention aims to solve the above-mentioned technical problems, and proposes an authentication device and authentication method that combines finger vein recognition, wrist vein recognition, and nail recognition, so that the authentication device and authentication method can have higher anti-counterfeiting and practicability , and improve the accuracy of authentication. In order to solve the above-mentioned technical problems, the present invention is achieved by the following means.

The authentication device provided by the present invention that combines finger vein recognition with wrist vein recognition and nail recognition includes a wrist vein feature information collection device, a nail feature information collection device and a finger vein feature information collection device connected thereto. The device, the finger vein feature information collection device, and the wrist vein feature information collection device are arranged side by side on the table body, and the palm passes through the wrist vein feature information collection device and then extends into the finger vein feature information collection device and the nail feature information collection device. In the device, the wrist is placed on the placement seat in the above-mentioned wrist vein characteristic information collection device, and the fingers are placed on the finger placement seat in the above-mentioned finger vein characteristic information collection device and nail feature information collection device, and the wrist vein characteristic information The acquisition device can be movably adjusted on the platform. In addition, the authentication device also includes a feature information storage unit, a data processing unit, a matching feature information comparison unit, a controller, and an input and output interface, wherein the finger vein feature information collection device, nail feature information collection device and wrist vein feature information collection device All are connected to the feature information storage unit, the feature information storage unit is connected to the data processing unit, the data processing unit is connected to the matching feature information comparison unit, and the input and output interfaces are connected to the matching feature information comparison unit. The wrist vein feature information collection device is responsible for collecting the information required for wrist vein recognition, the nail feature information collection device collects the information required for nail recognition, the finger vein feature information collection device collects the information required for finger vein feature recognition, and the above wrist vein feature information The information required for wrist vein identification collected by the collection device, the finger vein feature information collected by the finger vein feature information collection device, and the information required for nail recognition collected by the nail feature information collection device are stored in the feature information storage part, and the feature information comparison part is from The above-mentioned feature information storage unit retrieves corresponding biological feature information for comparison. The feature information comparison unit includes an image extraction unit and a sample data storage unit. The image extraction unit collects the wrist vein feature information, nail feature information and Analyze and process the finger vein feature information to extract the feature value of the authenticator. The sample data storage unit stores the pre-collected wrist vein feature information of the authenticator obtained through the input and output interface, the finger vein feature information collection device and the nail feature. information. In addition, the feature information comparison unit in the authentication device of the present invention that combines finger vein recognition, wrist vein recognition, and nail recognition can independently compare the extracted feature values of the authenticator with the pre-collected authenticator's wrist The facial vein feature information, the finger vein feature information and the nail feature information are compared, and the result of the comparison is sent to the first controller; the first controller is connected to the feature information comparison unit, and the first controller The comparison result signal of the comparison part controls the corresponding prompting device to give the authentication result. In addition, the above-mentioned input and output interfaces can also be connected to the network to be further connected to a remote main server for data information transmission or authentication information verification, which can be backed up regularly and seamlessly connected with the WIS database.

The wrist vein feature information collection device is connected with the finger vein feature information collection device, wherein the wrist vein feature information collection device includes a first infrared imaging light source, an infrared imaging device, and a wrist sensor. When the authentication wrist is close to the device, the authentication The device automatically enters the power-on state. When the wavelength of the incident light is between 720nm and 1100nm, it can penetrate the bones and wrist muscles well and highlight the vascular structure of the wrist. This wavelength range belongs to near-infrared light. Through the comparative experiments of several groups of infrared light sources with different wavelengths, we found that the infrared light with a wavelength of 850nm has a better contrast effect, and the wrist vein image is clearer. In the scheme selection, it is preferable to use two groups of infrared light-emitting diodes with wavelengths of 850nm, which can be controlled in groups and whose brightness is continuously adjustable as the light source for vein images. In order to obtain better image quality, infrared LED light-emitting tubes can be used The head is cut into a plane and polished, and a diffuser is installed in front of the first infrared light source to obtain uniform discrete infrared light. The infrared imaging device uses a thermal imaging camera to perform infrared scanning on the user's wrist; the wrist position sensor is set on the workbench, and when the authenticator enters the sensing area, the wrist vein feature information collection device enters the working state , the finger vein feature information collection device also enters the working state. The infrared imaging light source is used for the illumination of wrist veins, and an infrared filter and an anti-infrared filter are arranged in front of the infrared imaging device for reflecting infrared light and transmitting visible red light; the computer processing system passes through the data transmission interface Connect with the infrared imaging device, extract the feature quantity with wrist vein feature information from the image output by the infrared imaging device, and input the above feature quantity into the data processing part. In the authentication device of the present invention that combines finger vein recognition, wrist vein recognition, and nail recognition, the characteristic value of the wrist vein characteristic information collected by the authenticator can be independently compared with the pre-collected wrist vein characteristic information of the authenticator. Perform comparison, and send the result of comparison to the second controller; the second controller is connected with the feature information comparison part, and the second controller controls the adoption of the present invention according to the comparison result signal of the feature information comparison part. An authentication device that combines finger vein recognition with wrist vein recognition and nail recognition sends or displays comparison results to realize the authentication process.

The nail feature information collection device is connected with the finger vein feature information collection device, wherein the nail feature information collection device includes a second platform, a third light source, a fourth light source, and a detection element, wherein the third light source is arranged on the second platform, and the detection element The movable one is arranged on the second platform, and the fourth light source is arranged under the first platform, facing the detection unit of the second platform. As the third light source and the fourth light source, a light source that emits an absorption wavelength as a measurement object, such as a near-infrared light source, is used.

The third light source is used to determine the position of the nail. Through the measurement of the two third light sources, the area to be detected is determined, which is the cortex in the contact transition area between the nail surface and the wrist cortex. When the incident light wavelength of the fourth light source is between 1780nm and At 1850nm, the reflected wavelength information can be better received through the detection element. In the selection of the above scheme, it is preferable to use infrared light emitting diodes with a wavelength of 810nm, which can be controlled in groups and whose brightness is continuously adjustable as the light source for measurement. The fourth light source is arranged under the first platform, and the emitted Near-infrared light has a good penetration test effect when the wavelength is 1780-1850nm. The above-mentioned near-infrared light passes through the fingertips and nails and is detected by the detection element, and the above-mentioned characteristic values are also input into the data processing unit. In the authentication device of the present invention that combines finger vein recognition, wrist vein recognition, and nail recognition, the characteristic value of the authenticator whose nail feature information is collected can be independently compared with the pre-collected nail feature information of the authenticator, And the result of the comparison is sent to the second controller; the second controller is connected with the feature information comparison part, and the second controller controls the finger vein identification and the comparison result signal of the feature information comparison part of the present invention The authentication device combining wrist vein recognition and nail recognition sends or displays the comparison result to realize the authentication process and control the access control device.

Utilizing the authentication method of the present invention using an authentication device that combines finger vein recognition, wrist vein recognition, and nail recognition, through data processing of certain feature information, the wrist vein feature information, finger vein feature information, and nail feature information are obtained. The characteristic information matching group can eliminate the problem of inaccurate verification caused by the biometric verification of the existing technology that may change with age and physiological changes, and this method uses wrist vein, finger vein characteristic information and nail The matching group of feature information is used for authentication, which greatly improves the accuracy and reliability of identity authentication in the security field.

Description of drawings

Fig. 1 is a structural schematic diagram of an authentication device combining finger vein recognition, wrist vein recognition and nail recognition according to the present invention Fig. 2 is a schematic diagram of an authentication device using finger vein recognition combined with wrist vein recognition and nail recognition according to the present invention Schematic diagram of the structure of the finger vein feature acquisition part.

Fig. 3 is a structural schematic diagram of the fingernail recognition part of the authentication device combining finger vein recognition, wrist vein recognition and nail recognition according to the present invention.

FIG. 4 is a schematic structural view of the wrist vein feature collection part of the authentication device that uses finger vein recognition combined with wrist vein recognition and nail recognition in the present invention.

Fig. 5 is a schematic diagram of the position of the characteristic area collected by the nail recognition part of the authentication device which adopts the combination of finger vein recognition, wrist vein recognition and nail recognition according to the present invention.

detailed description

Below in conjunction with the accompanying drawings, through the description of the specific implementation examples, the specific embodiments of the present invention, such as the shape, structure, mutual position and connection relationship between each part, the role and working principle of each part, etc. It will be further described in detail, and the authentication method of the present invention will be described in detail.

Figures 1-4 are the authentication device 1 provided by the present invention that combines finger vein recognition, wrist vein recognition, and nail recognition, including a finger vein feature collection device 2, a nail feature information collection device 3, and a wrist vein feature information collection device 4. The finger vein feature collection device 2, the nail feature information collection device 3 and the wrist vein feature information collection device 4 are arranged side by side on the table body 6, and the palm passes through the wrist vein feature information collection device 4 and then extends into the finger In the vein feature collection device 2 and the nail feature information collection device 3, the wrist is placed on the placement seat in the above-mentioned wrist vein feature information collection device 4, and the fingers are placed in the above-mentioned finger vein feature collection device 2 and nail feature information collection device 3 The inner fingers are placed on the seat, and the wrist vein feature information collection device can be movably adjusted on the platform. In addition, a feature information storage unit, a data processing unit, a matching feature information comparison unit, and a controller are provided in the platform 6 of the authentication device, and an input and output interface 5 is provided on the side of the platform 6 .

The finger vein feature information collection device 2 is arranged on the surface of the table body 6, and includes a housing 21, a first infrared imaging light source 22, a first infrared imaging device 23, a finger angle sensor 24, and a finger placement seat 25, wherein the housing is provided with There is a power switch or a human body sensor, and when the authenticator is close to the device, the authentication device automatically enters the power-on state, and the middle part of the housing 21 is provided with a semicircular hole for inserting fingers, and the finger placement seat 25 is arranged on the In the above-mentioned semicircular hole, a plurality of rows of first infrared imaging light sources 22 are arranged in the middle of the top of the semicircular hole facing the finger placement seat, and on both sides of the first infrared imaging light source 22 on the inner wall of the semicircular hole Two finger angle sensors 24 are provided, and the arrangement mode of two finger angle sensors 24 on each side is that a finger angle sensor is respectively set on both sides of the horizontal position flush with the placing surface of the finger placement seat 25. A finger angle sensor is arranged on both sides of the flat horizontal position of the seat at an angle of 45 degrees; the bottom of the housing 21 is provided with a feature information storage part, a data processing part, a matching feature information comparison part, The transmission device to which the controller is connected.

Wrist vein feature information collection device 4 is arranged on the rear side of finger vein feature collection device 2 and nail feature information collection device 3, and is arranged on the surface of table body 6. Wrist vein feature information collection device 4 includes vein feature information collection The device housing 41, the first infrared imaging light source 42, the infrared imaging device 43, the wrist sensor 44, and the wrist placement seat 45, when the authenticator approaches the device, the authentication device automatically enters the power-on state according to the sensing of the wrist sensor 44 , the middle part of the housing 41 is provided with a semicircular hole for extending into the wrist, the wrist placement seat 45 is arranged in the above semicircular hole, and the middle of the top in the semicircular hole is facing the wrist placement seat. Multiple rows of first infrared imaging light sources 42 are arranged on the position; the bottom of the vein characteristic information collection device housing 41 is provided with a characteristic information storage unit, a data processing unit, a matching characteristic information comparison unit, and a controller in the table body 6. transmission device.

The nail feature information collection device 3 is connected to the finger vein feature collection device 2, wherein the nail feature information collection device 3 includes a second platform 31, a third light source 32, a fourth light source 33, and a detection element 34, wherein the third light source 32 is arranged at the On the second platform 31 , the detection element is movably arranged on the second platform 31 , and the fourth light source 33 is arranged under the first platform 35 , facing the detection element 34 of the second platform 31 . The fourth light source 33 is a light source that emits an absorption wavelength as a measurement object, such as a near-infrared light source.

The third light source 32 is used to determine the position of the nail. Through the measurement of the two third light sources 32, the area to be detected is determined, that is, the cortex 7 in the contact transition area between the nail surface and the finger cortex, wherein the nail feature information collection device 3 collects The process of nail feature information is that the third light source is used to determine the position of the nail, and through the measurement of the two third light sources, the area to be detected is determined, that is, the cortex 7 in the contact transition area between the nail surface and the finger cortex, and then through the second Four light sources emit measuring beams, and the emitted near-infrared rays have a good penetration test effect when the wavelength is 1780-1850nm. The fourth light source is arranged under the first platform, and the near-infrared light passes through the fingertips and nails to be detected by the detection element, and the above-mentioned characteristic value is also input into the data processing unit. In addition, the input and output interface 5 of the authentication device 1 that uses finger vein recognition, wrist vein recognition, and nail recognition in the present invention can also be connected to the network, so as to be further connected to a remote main server for data information transmission or The verification of certification information can be backed up regularly, and can be seamlessly connected with the WIS database.

The method for authenticating using the authentication device of the present invention that combines finger vein recognition, wrist vein recognition, and nail recognition includes the following:

The first is the identity registration process of the authenticator. Initially, the nail feature information, finger vein feature information and wrist vein feature information of the specific person who needs to be authenticated are registered in the database. The finger vein feature information collected during the registration process includes multiple angles of the finger. When registering, let the finger rotate to collect continuous multi-angle finger vein feature information, and input the above-mentioned finger vein feature information containing angle information into the feature information storage unit; the wrist vein features collected at the same time during the registration process The information includes the wrist vein feature information collected at the frontal angle determined by the wrist position sensor. After the voice prompt device prompts that the position is correct, the wrist vein feature information is collected, and the above-mentioned collected wrist vein feature information is input into the feature Information preservation department; in addition, it also includes the nail identification feature information collected by the nail feature information collection device; in addition, it also includes the nail identification feature information collected by the nail feature information collection device at the same time, that is, the cortex of the contact transition area between the nail surface and the finger cortex is collected. information; after the collection of the above three kinds of feature information is completed, the acquired nail recognition feature information, finger vein feature information and wrist vein feature information will be collected and acquired in the feature information storage part to form real-time nail recognition feature information, finger vein feature information, and finger vein feature information in the data processing part. Feature information and wrist vein feature information matching group, the matching group includes finger vein feature information with angle information, nail recognition feature information, wrist vein feature information collected at the same time, the method of forming a matching group includes finger vein feature information Information such as shape, direction, and nail recognition feature information, the shape of wrist vein features, etc., in order to improve the matching accuracy, before data fusion, the following data standardization methods are used to standardize the matching information of these feature data:

a'=(a-c)/σ

Where a is the matching score of vein shape, direction feature, and nail shape feature, c and σ represent the mean and variance of the matching score a, and then the obtained normalized data a' is used as the input data of the fusion method.

The data standardization method is used to standardize the nail identification feature information, the finger vein feature information and the wrist vein feature information to obtain the nail identification feature information standard data, the finger vein feature information standard data and the wrist vein feature information standard data, and then The standard data of the characteristic information of nail recognition and the other two standard data of characteristic information are formed into a characteristic information matching group through weighted fusion method.

The second is the authentication process. When the authenticator needs to perform characteristic information authentication, the authentication device can automatically enter the power-on state by turning on the switch or through the human sensor. The collection device enters into the collection process of finger vein feature information, and at the same time, the nail feature information collection device and wrist vein feature information collection device also enters the collection process of nail recognition feature information and wrist vein feature information. First, use the finger angle sensor to detect the placement information of the finger protruding into the semicircular hole housing, that is, use the four finger angle sensors to detect the angle between the top of the arc of the nail and the horizontal plane, and determine the The placement angle information of the finger relative to the horizontal plane of the finger placement seat, at the same time, the camera for nail recognition starts to work, the first infrared imaging light source of the finger vein feature information collection device and the second infrared imaging light source of the wrist vein feature information collection device emit light, The first infrared imaging device of the finger vein feature information collection device and the second infrared imaging device of the wrist vein feature information collection device collect the finger vein feature and wrist vein sign information and the nail features collected by the nail feature information collection device. The information is input to the feature information storage unit together, wherein the feature information includes the shape and direction of finger veins, nail feature information, and the shape of wrist vein features; the feature information storage unit inputs the above feature information to the data processing unit for fusion, first through The following data normalization method standardizes the matching information of these data:

a'=(a-c)/σ

Where a is the matching score of vein shape, direction feature, and nail shape feature, c and σ represent the mean and variance of the matching score a, and then the obtained standardized data a' is used as the input data of the fusion method to obtain the standard data of nail recognition feature information , finger vein feature standard data and wrist vein feature standard data, the three feature standard data are formed into a feature information matching group through weighted fusion method; then the above feature information matching group is input into the matching feature information comparison part, In the information comparison part, the feature information matching group currently authenticated by the authenticator will be compared with the feature information matching group at the time of identity registration. The comparison includes the shape of the nail, the shape and direction of the vein of the finger, and the shape of the vein feature of the wrist. The comparison of the feature information matching group of the information, such as according to the currently authenticated feature information matching group according to the corresponding nail shape, finger vein shape, direction, and wrist vein feature shape in the matching feature information comparison part. Compare the pre-registered feature information matching groups with the most similar features; perform identity verification and confirm the identity according to the results of the above comparison.

Among them, the process of collecting nail feature information by the nail feature information collection device 3 is that the third light source is used to determine the position of the nail, and through the measurement of the two third light sources, the area to be detected is determined, which is the contact transition between the nail surface and the finger cortex. The cortex 7 of the area is then passed through the fourth light source to emit a measurement beam, which emits near-infrared light, and has a good penetration test effect when the wavelength is 1780-1850nm. The fourth light source is arranged under the first platform, and the near-infrared light passes through the fingertips and nails to be detected by the detection element, and the above-mentioned characteristic value is also input into the data processing unit.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (3)

1. An authentication device that combines finger vein recognition with wrist vein recognition and nail recognition, characterized in that it includes a finger vein feature information collection device, a nail feature information collection device and a wrist vein feature information collection device, three devices Arranged side by side on the table body, the palm passes through the wrist vein feature information collection device and then extends into the finger vein feature information collection device and nail feature information collection device, and the wrist is placed in the wrist vein feature information collection device On the placement seat, the finger is placed on the finger placement seat in the above-mentioned finger vein feature information collection device and nail feature information collection device, and the wrist vein feature information collection device can be movably adjusted on the platform; in the authentication device In the body of the platform, there are also a feature information storage unit, a data processing unit, a matching feature information comparison unit, and a controller, and an input and output interface is set on the side of the platform, where the finger vein feature information collection device, the nail feature information Both the collection device and the wrist vein feature information collection device are connected to the feature information storage unit, the feature information storage unit is connected to the data processing unit, the data processing unit is connected to the matching feature information comparison unit, and the input and output interfaces are compared with the matching feature information The finger vein feature information collection device includes a finger vein feature information collection device housing, a first infrared imaging light source, a first infrared imaging device, a finger angle sensor, and a finger placement seat, wherein the housing is provided with a power switch or a human sensor. When the authenticator approaches the device, the authentication device automatically enters the power-on state. The middle part of the housing is provided with a semicircular hole for inserting fingers. The finger rest is set in the semicircular hole. There are multiple rows of first infrared imaging light sources in the middle of the top of the circular hole facing the finger placement seat, and two fingers are arranged on each side of the first infrared imaging light source on the inner wall of the semicircular hole. Angle sensor, two finger angle sensors on each side are set up in the form of a finger angle sensor on both sides of the horizontal position flush with the finger rest, and a 45-degree angle at the horizontal position flush with the finger rest A finger angle sensor is installed on both sides of the center; the bottom of the shell is provided with a transmission device connected to the feature information storage part, data processing part, matching feature information comparison part and controller in the platform; the wrist vein feature information The collection device is arranged on the rear side of the finger vein feature collection device and the nail feature information collection device, which includes a wrist vein feature information collection device housing, a second infrared imaging light source, an infrared imaging device, a wrist sensor, and a wrist placement seat. When the authenticator approaches the device, the authentication device automatically enters the power-on state according to the sensing of the wrist sensor. The bottom placement seat is arranged in the above-mentioned semicircular hole, and a plurality of rows of second infrared imaging light sources are arranged on the position facing the wrist placement seat in the middle of the top of the semicircular hole; the nail characteristic information collection device and the wrist vein characteristic information collection device connection, wherein the nail feature information collection device includes a second platform, a third light source, a fourth light source and detection element, wherein the third light source is arranged on the second platform, the detection element is movably arranged on the second platform, the fourth light source is arranged under the first platform, facing the detection element of the second platform, and the second The platform is on the top, the first platform is on the bottom, and the third light source is used to determine the position of the nail, and the fourth light source emits near-infrared light to pass through the fingertip and nail for detection through the detection element; wherein the wavelength of the second infrared imaging light source is 850nm, the third light source and the fourth light source are both near-infrared light sources, the wavelength of the third light source is 810nm, and the wavelength range of the fourth light source is 1780-1850nm. 2. The authentication device using finger vein recognition, wrist vein recognition and nail recognition according to claim 1, characterized in that the infrared imaging device is an infrared camera. 3. The authentication device using finger vein recognition, wrist vein recognition and nail recognition according to claim 1, characterized in that an infrared filter and an anti-infrared filter are arranged in front of the infrared imaging device.