CN111222483A - Three-dimensional finger vein recognition system - Google Patents
Three-dimensional finger vein recognition system Download PDFInfo
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- CN111222483A CN111222483A CN202010039146.2A CN202010039146A CN111222483A CN 111222483 A CN111222483 A CN 111222483A CN 202010039146 A CN202010039146 A CN 202010039146A CN 111222483 A CN111222483 A CN 111222483A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/70—Multimodal biometrics, e.g. combining information from different biometric modalities
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
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Abstract
The invention relates to a three-dimensional finger vein recognition system, which comprises an original data acquisition module, a recognition data acquisition module and a picture comparison module, wherein the original data acquisition module comprises an original data acquisition device and a three-dimensional model generation module, the original data acquisition device can form any angle with an acquired finger and take an image of a finger vein, the three-dimensional model generation module generates a three-dimensional finger vein model according to image information taken by the original data acquisition device at different angles and transmits the taken image information and the generated three-dimensional finger vein model to the picture comparison module, and the recognition data acquisition module is used for taking a finger vein image of the put finger and transmitting the taken finger vein image to the picture comparison module; and the image comparison module compares the finger vein image obtained by the identification data acquisition module with the obtained three-dimensional finger vein model, and judges whether the finger to be identified is the finger acquiring the original data.
Description
Technical Field
The invention relates to the technical field of recognition, in particular to a three-dimensional finger vein recognition system.
Background
The finger vein recognition technology is originated from a high-level research project of Hitachi company on the management of human brain functional activities in the field of medical science and technology, in the research, near infrared rays are used for observing the increase condition of blood flow, and researchers find that the technology is also suitable for the acquisition work of finger vein images; since the finger vein images of each finger of each person are different, the recognition technology based on the finger vein image principle can be realized; compared with other biological identification technologies, the finger vein identification technology has the following three main advantages: 1. because the finger veins are hidden in the body, the risk of imitation or theft does not exist, and the skin condition on the surface of the hand of a human cannot influence the identification work; 2. the adoption of infrared rays by non-invasive and non-contact imaging technologies can ensure the convenience and cleanness of users; 3. because of the relative stability of the finger vein shape and the sharpness of the captured image, the small-scale simple data image technology processing can be carried out on the pattern data shot by the low-resolution camera; in order to realize better finger vein identification, a three-dimensional finger vein identification system is provided, and the three-dimensional finger vein identification system comprises an original data acquisition module, an identification data acquisition module and a comparison module for comparing original data with identification data, wherein the existing original data acquisition module and the existing identification data acquisition module are used for shooting fingers through a plurality of cameras and then obtaining an original data picture and an identification data picture, however, certain defects exist, the original data cannot establish a complete finger vein three-dimensional model, and in the identification data acquisition process, the situation that different finger placement angles cause identification errors easily occurs.
Disclosure of Invention
The invention aims to provide a three-dimensional finger vein recognition system, which can generate a three-dimensional finger vein model through an original data acquisition module, can ensure that recognition data acquired at any finger placement angle can be accurately compared with the three-dimensional finger vein model through a picture comparison module in a recognition process, and avoids the occurrence of recognition errors.
In order to achieve the above purpose, the invention adopts the technical scheme that: a three-dimensional finger vein recognition system comprises an original data acquisition module, a recognition data acquisition module and a picture comparison module, wherein the original data acquisition module comprises an original data acquisition unit and a three-dimensional model generation module, the original data acquisition unit can form any angle with an acquired finger and take pictures of finger veins, the three-dimensional model generation module generates a three-dimensional finger vein model according to image information taken by the original data acquisition unit at different angles and transmits the taken image information and the generated three-dimensional finger vein model to the picture comparison module, and the recognition data acquisition module is used for taking finger vein pictures of the put finger and transmitting the taken finger vein pictures to the picture comparison module; the image comparison module compares the finger vein image obtained by the identification data acquisition module with the three-dimensional finger vein model obtained by the original data acquisition module, and judges whether the finger to be identified is the finger which acquires the original data.
Preferably, the original data collector comprises an original collecting shell, a cylindrical cavity is arranged in the original collecting shell in an inverted mode, a circular original collecting rotating slide rail is arranged on the inner wall of the original collecting shell, an original collecting rotating slide rail is matched with an original collecting rotating block, an original collecting driving device which enables the original collecting rotating block to move on the collecting rotating slide rail is matched with the original collecting rotating block, and an original collecting light source and an original collecting camera are arranged on the original collecting rotating block.
Preferably, the original acquisition driving device comprises an original acquisition rotating motor arranged outside the original acquisition shell, the original acquisition rotating motor is connected with an original acquisition rotating shaft penetrating into the original acquisition shell, the axis of the original acquisition rotating shaft and the axis of the original acquisition sliding rail are on the same straight line, the original acquisition rotating shaft is connected with an original acquisition rotating disc, and the original acquisition rotating disc is connected with an original acquisition rotating block through an original acquisition rotating connecting rod.
Preferably, the side of the original acquisition shell is provided with an original acquisition insertion hole for inserting a finger, at least four distance measuring devices are uniformly embedded in the inner wall of the original acquisition insertion hole, distance measuring information of the distance measuring devices is transmitted to the original acquisition controller, and the original acquisition controller controls the intensity of a light source emitted by an original acquisition light source according to the distance measuring information of the distance measuring devices.
Preferably, the identification data acquisition module gather the shell including discernment, discernment gather the inside cavity that is of shell, and inside be provided with be no less than three discernment gather the camera and gather the discernment collection light source that the camera cooperation was used with the discernment, the discernment gather the camera and the discernment gather the light source and be connected to discernment collection controller.
Preferably, the cavity lower part of discernment collection shell is square for arc upper portion, and the shooting direction that camera was gathered in one of them discernment is vertical upwards, the upper portion inner wall of discernment collection shell is provided with and is no less than four discernment contrast archs, the picture that the vertical ascending discernment collector of shooting direction was shot is given the discernment and is gathered the picture comparator, the discernment is gathered the picture comparator and is compared the thickness size of the finger of shooting as the comparison thing through the discernment contrast arch of shooting, and with thickness size feedback to discernment collection control ware, discernment collection control ware is according to the light source intensity of the size information control discernment collection light source transmission of robustness.
Drawings
FIG. 1 is a schematic structural diagram of an original data collector;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic structural diagram of the identification data acquisition module.
The text labels shown in the figures are represented as: 1. identifying a collection shell; 2. identifying and collecting a camera; 3. identifying and collecting a light source; 4. identifying a comparison bump; 11. an original collection shell; 12. original collection and block conversion; 13. an original collection light source; 14. an original acquisition camera; 15. originally collect and rotate the slide rail; 16. originally collect and rotate the tie rod; 17. an original acquisition rotating disc; 18. a transfer acquisition rotating shaft; 19. originally collecting a rotating motor; 20. an original acquisition insertion port; 21. a distance measuring device.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
The invention specifically comprises the following steps: a three-dimensional finger vein recognition system comprises an original data acquisition module, a recognition data acquisition module and a picture comparison module, wherein the original data acquisition module comprises an original data acquisition unit and a three-dimensional model generation module, the original data acquisition unit can form any angle with an acquired finger and take pictures of finger veins, the three-dimensional model generation module generates a three-dimensional finger vein model according to image information taken by the original data acquisition unit at different angles and transmits the taken image information and the generated three-dimensional finger vein model to the picture comparison module, and the recognition data acquisition module is used for taking finger vein pictures of the put finger and transmitting the taken finger vein pictures to the picture comparison module; the image comparison module compares the finger vein image obtained by the identification data acquisition module with the three-dimensional finger vein model obtained by the original data acquisition module, and judges whether the finger to be identified is the finger which acquires the original data.
The attendance system applied to 10-person companies comprises the following specific operations that firstly, 10 persons are grouped according to names, then, 10 fingers of the persons are put into an original data collector, vein pictures of the fingers are shot at different angles through the original data collector, the vein pictures shot at different angles are transmitted to a three-dimensional model generation module, a three-dimensional finger vein model of a person is constructed through the three-dimensional model generation module, the three-dimensional finger vein model is correspondingly bound with the 10 persons and is transmitted to a picture comparison module as compared original data, thus completing the input of vein information of the 10 persons, when the 10 persons are in attendance, when an appraised person inserts the fingers into an identification data collection module, the identification data collection module shoots finger vein images of the put fingers, and the shot picture pairs penetrate into the picture comparison module, the attendance system can ensure that the finger vein images collected by the identification data acquisition module can be compared and identified in the picture comparison module, the identification failure caused by different finger putting angles can be avoided, and accurate three-dimensional finger vein identification can be realized.
As shown in fig. 1-2, the raw data collector includes a raw collection shell 11, the raw collection shell 11 is an inverted cylindrical cavity, a circular raw collection rotary slide rail 15 is disposed on an inner wall of the raw collection shell 11, the raw collection rotary slide rail 15 is matched with a raw collection rotary block 12, the raw collection rotary block 12 is matched with a raw collection driving device which enables the raw collection rotary slide rail to move on the collection rotary slide rail 15, and a raw collection light source 13 and a raw collection camera 14 are disposed on the raw collection rotary block 12.
The specific work of the original data acquisition device is as follows, a finger is inserted into a cylindrical cavity of an original acquisition shell 11, then near infrared rays are emitted through an original acquisition light source 13, the finger is arranged through the original acquisition light source, an original acquisition camera 14 shoots vein images, an original acquisition driving device can drive an original acquisition rotating block 12 to move on an original acquisition rotating slide rail 15, further the angles of the original acquisition camera 14 and the finger can be changed, vein images at different angles are shot, the work of the original acquisition light source 13 and the original acquisition camera 14 can be controlled through manual operation buttons, and the automatic control of the original acquisition controller can be matched.
As shown in fig. 1-2, the original collection driving device includes an original collection rotating motor 19 disposed outside the original collection shell 11, the original collection rotating motor 19 is connected to an original collection rotating shaft 18 penetrating into the original collection shell 11, an axis of the original collection rotating shaft 18 is in the same straight line with an axis of the original collection sliding rail 15, the original collection rotating shaft 18 is connected to an original collection rotating disc 17, and the original collection rotating disc 17 is connected to the original collection rotating block 12 through an original collection rotating connecting rod 16.
The specific operation of the original acquisition driving device is as follows, the original acquisition rotating motor 19 drives the original acquisition rotating shaft 18 to rotate, and then drives the original acquisition rotating disc 17 to rotate, and then drives the original material rotating connecting rod 16 to rotate along with the original material rotating connecting rod, and then drives the original acquisition rotating block 12 to rotate on the original acquisition rotating slide rail 15, in the specific operation process, the original acquisition rotating motor 19 can adopt a stepping motor, and controls the stepping angle, so that the position of each rotation of the original acquisition rotating block 12 can be controlled.
As shown in fig. 2, an original collecting insertion hole 20 for inserting a finger is formed in a side surface of the original collecting shell 11, at least four distance measuring devices 21 are uniformly embedded in an inner wall of the original collecting insertion hole 20, distance measuring information of the distance measuring devices 21 is transmitted to an original collecting controller, and the original collecting controller controls intensity of a light source emitted by the original collecting light source 13 according to the distance measuring information of the distance measuring devices 21.
After the finger is inserted from the original acquisition insertion opening 20, the distance meter 21 measures the distance between the finger and the finger, and the original acquisition controller judges the thickness of the finger according to the values measured by the plurality of distance meters 21, so as to control the intensity of the light source emitted by the original acquisition light source 13 and ensure that the original acquisition camera shoots a good finger vein image.
As shown in fig. 3, the identification data acquisition module comprises an identification acquisition shell 1, the identification acquisition shell 1 is internally provided with a cavity, the interior of the cavity is provided with at least three identification acquisition cameras 2 and identification acquisition light sources 3 matched with the identification acquisition cameras 2, and the identification acquisition cameras 2 and the identification acquisition light sources 3 are connected to an identification acquisition controller.
The finger penetrates into the cavity inside the identification collection shell 1, the identification collection light source 3 emits near infrared light, then the finger is subjected to finger vein image emission through the plurality of collection cameras 2, then at least three finger vein images can be obtained, and when the image comparison module compares the image with the three-dimensional finger vein model, a more accurate comparison result can be obtained.
As shown in fig. 3, the cavity lower part of discernment collection shell 1 is arc upper portion for square, and one of them discernment is gathered the shooting direction of camera 2 and is vertical up, the upper portion inner wall of discernment collection shell 1 is provided with and is no less than four discernment and compare protruding 4, the picture that the vertical up discernment collector 2 of shooting direction was shot is transmitted for discernment collection picture comparator, discernment collection picture comparator compares out the thickness size of the finger of shooting as the comparison thing through the discernment comparison arch of shooting, and with thickness size feedback to discernment collection controller, discernment collection controller is according to the light source intensity of the size information control discernment collection light source 3 transmission of robustness.
After the finger penetrates identification collection shell 1, gather the camera 2 through the vertical ascending identification of identification collection controller control shooting direction and shoot the picture, the picture that obtains of shooing must contain two at least discernment contrast arch 4, discernment is gathered the protruding thickness size of comparing the finger that shoots as the comparison thing of discernment contrast arch through the discernment contrast of shooing of picture comparator (for example two bellied intervals are 50mm when setting for, two bellied intervals of the picture that obtain of shooting also represent 50mm, so can judge through the distance on the picture and shoot and obtain the actual thickness size of finger), and feed back the thickness size to discernment collection controller, discernment collection controller is according to the light source intensity of the transmission of thick and strong size information control identification collection light source 3.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principle and embodiments of the present invention have been described herein by way of specific examples, which are provided only to help understand the method and the core idea of the present invention, and the above is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can also be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (6)
1. A three-dimensional finger vein recognition system is characterized by comprising an original data acquisition module, a recognition data acquisition module and a picture comparison module, wherein the original data acquisition module comprises an original data acquisition unit and a three-dimensional model generation module, the original data acquisition unit can form any angle with an acquired finger and take pictures of finger veins, the three-dimensional model generation module generates a three-dimensional finger vein model according to image information taken by the original data acquisition unit at different angles and transmits the taken image information and the generated three-dimensional finger vein model to the picture comparison module, and the recognition data acquisition module is used for taking a finger vein image of the put finger and transmitting the taken finger vein image to the picture comparison module; the image comparison module compares the finger vein image obtained by the identification data acquisition module with the three-dimensional finger vein model obtained by the original data acquisition module, and judges whether the finger to be identified is the finger which acquires the original data.
2. The three-dimensional finger vein recognition system according to claim 1, wherein the original data acquisition unit comprises an original acquisition shell (11), the original acquisition shell (11) is internally provided with an inverted cylindrical cavity, a circular original acquisition rotary slide rail (15) is arranged on the inner wall of the original acquisition shell (11), the original acquisition rotary slide rail (15) is matched with an original acquisition rotary block (12), the original acquisition rotary block (12) is matched with an original acquisition driving device which enables the original acquisition rotary block to move on the acquisition rotary slide rail (15), and an original acquisition light source (13) and an original acquisition camera (14) are arranged on the original acquisition rotary block (12).
3. The three-dimensional finger vein recognition system according to claim 2, wherein the original collection driving device comprises an original collection rotating motor (19) arranged outside the original collection shell (11), the original collection rotating motor (19) is connected with an original collection rotating shaft (18) penetrating into the original collection shell (11), the axis of the original collection rotating shaft (18) is in the same straight line with the axis of the original collection sliding rail (15), the original collection rotating shaft (18) is connected with an original collection rotating disc (17), and the original collection rotating disc (17) is connected with the original collection rotating block (12) through an original collection rotating connecting rod (16).
4. The system for identifying the three-dimensional finger vein as claimed in claim 2, wherein the original collection insertion opening (20) for inserting the finger is opened on the side surface of the original collection shell (11), at least four distance measuring devices (21) are uniformly embedded in the inner wall of the original collection insertion opening (20), the distance measuring information of the distance measuring devices (21) is transmitted to the original collection controller, and the original collection controller controls the intensity of the light source emitted by the original collection light source (13) according to the distance measuring information of the distance measuring devices (21).
5. The three-dimensional finger vein recognition system according to claim 1, wherein the recognition data acquisition module comprises a recognition acquisition shell (1), the recognition acquisition shell (1) is internally provided with a cavity, at least three recognition acquisition cameras (2) and recognition acquisition light sources (3) matched with the recognition acquisition cameras (2) are arranged in the recognition acquisition shell, and the recognition acquisition cameras (2) and the recognition acquisition light sources (3) are connected to a recognition acquisition controller.
6. The three-dimensional finger vein recognition system according to claim 5, wherein the lower portion of the cavity of the recognition and collection shell (1) is arc-shaped, the upper portion of the cavity is square, the shooting direction of one recognition and collection camera (2) is vertically upward, at least four recognition and comparison bulges (4) are arranged on the inner wall of the upper portion of the recognition and collection shell (1), a picture shot by the recognition and collection camera (2) with the vertically upward shooting direction is transmitted to the recognition and collection picture comparator, the recognition and collection picture comparator compares the thickness of the shot finger by taking the recognition and comparison bulges as a comparison object, the thickness is fed back to the recognition and collection controller, and the recognition and collection controller controls the intensity of the light source emitted by the recognition and collection light source (3) according to the thickness information.
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| CN202010039146.2A CN111222483A (en) | 2020-01-14 | 2020-01-14 | Three-dimensional finger vein recognition system |
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| CN202010039146.2A CN111222483A (en) | 2020-01-14 | 2020-01-14 | Three-dimensional finger vein recognition system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112329652A (en) * | 2020-11-09 | 2021-02-05 | 长春工业大学 | Sliding type self-adaptive finger vein recognition device and method |
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| CN207182298U (en) * | 2017-07-28 | 2018-04-03 | 深圳先进技术研究院 | A kind of three-dimensional finger vein recognition system |
| CN109740561A (en) * | 2019-01-11 | 2019-05-10 | 重庆工商大学 | Three-dimensional finger vein imaging system based on monocular camera |
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| CN102117403A (en) * | 2011-03-16 | 2011-07-06 | 哈尔滨工程大学 | Finger knuckle crease and vein bimodal biological feature image acquisition device and method |
| CN102222225A (en) * | 2011-06-24 | 2011-10-19 | 洛阳师范学院 | Finger vein image anti-counterfeiting acquiring method |
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Application publication date: 20200602 |