CN212135464U - Binocular three-dimensional finger vein acquisition and authentication equipment - Google Patents
Binocular three-dimensional finger vein acquisition and authentication equipment Download PDFInfo
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- CN212135464U CN212135464U CN202021378484.0U CN202021378484U CN212135464U CN 212135464 U CN212135464 U CN 212135464U CN 202021378484 U CN202021378484 U CN 202021378484U CN 212135464 U CN212135464 U CN 212135464U
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Abstract
The utility model provides binocular three-dimensional finger vein acquisition and authentication equipment, which belongs to the technical field of identity recognition and comprises a finger sensing area, a first camera, a second camera, a controller and a light supplementing lamp source, wherein the first camera is used for acquiring a front image of a finger; the second camera is used for collecting a side image of the finger; the controller is respectively electrically connected with the finger sensing area, the first camera and the second camera and is used for receiving and processing image information captured by the first camera and the second camera; the light supplement lamp source is electrically connected with the controller and used for dynamically adjusting the illumination intensity according to the quality of the image information. The utility model provides a pair of two mesh three-dimensional finger vein collection authentication equipment, the image of collection have more characteristic points, can be more convenient carry out the feature and draw, improved the discernment rate of accuracy, reduce the rate of recognition and refuse the true rate. The binocular stereoscopic finger vein acquisition and authentication equipment also has the function of preventing falsification.
Description
Technical Field
The utility model belongs to the technical field of identification, more specifically say, relate to a two mesh three-dimensional finger vein collection authentication equipment.
Background
Finger vein recognition is an important component of biological recognition, and has been widely applied to the system fields of social security, education, medical treatment, company factories, bank finance, intelligent buildings, hotel management, prison access control and the like. The finger vein recognition technology is a biological recognition technology which is used for forming a vein blood vessel image by absorbing near infrared light by utilizing hemoglobin in a finger, then collecting the vein blood vessel image by a camera, extracting a characteristic value by a series of algorithms, and further identifying and identifying the personal identity.
At present, there are generally two ways for a finger vein collection device to acquire a vein pattern: near infrared ray transmission method and near infrared ray reflection method. The image collected by the current finger vein information collection device has the following characteristics:
the contrast of a local region 1 is low, the image of a place close to a light source is obvious, and the image of a place far away from the light source is fuzzy, so that the contrast of veins in the local region and the background is low.
2, the polarization property is realized, the skin at the finger joint is thin, the gray level at the joint of the finger joint is large, the gray levels at two sides are small, and the polarization phenomenon is generated.
3 there are shadows, bones and musculature of the finger, which can be produced in the image obtained in the near infrared light transmission.
These imaging characteristics bring certain difficulties to the image processing algorithm, and therefore, it is necessary to design a binocular stereoscopic finger vein collection authentication device for solving the problems that the images collected in the prior art contain fewer feature points, the image feature extraction is inconvenient, and the identification accuracy is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two mesh three-dimensional finger vein collection authentication equipment, it is less to aim at solving the characteristic point that the image that prior art gathered contains, and image characteristic draws inconveniently, discerns the lower technical problem of rate of accuracy.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a binocular stereoscopic finger vein collection authentication apparatus, including:
a finger sensing area;
the first camera is used for collecting a front image of a finger;
the second camera is used for collecting a side image of the finger;
the controller is respectively electrically connected with the finger sensing area, the first camera and the second camera and is used for receiving and processing image information captured by the first camera and the second camera; and
and the light supplement lamp source is electrically connected with the controller and is used for dynamically adjusting the illumination intensity according to the quality of the image information.
As another embodiment of the present application, the finger sensing area is provided with a touch key, and the touch key is electrically connected to the controller.
As another embodiment of the application, the number of the touch keys is two, and the two touch keys are electrically connected with the controller through a single-way and gate chip.
As another embodiment of the present application, the present application further includes a power supply for supplying power to the entire device; the power supply comprises an adjustable power supply electrically connected with the light supplementing lamp source, and the adjustable power supply is electrically connected with the controller by means of a digital potentiometer.
As another embodiment of the application, the system further comprises an external interface electrically connected with the controller.
As another embodiment of the present application, the controller is an STM32F407VGT6 processor.
As another embodiment of the application, the device further comprises an indicator light electrically connected with the controller and used for indicating whether the finger is placed at the correct position.
As another embodiment of the application, the device further comprises a buzzer or/and a body indicator light electrically connected with the controller.
As another embodiment of this application, still including being used for the shell, be equipped with the collection window that is used for holding the finger on the shell, first camera set up in on the arbitrary lateral wall of collection window, the second camera set up with on another lateral wall of collection window.
The utility model provides a pair of two mesh three-dimensional finger vein collection authentication equipment's beneficial effect lies in: compared with the prior art, the utility model relates to a two mesh three-dimensional finger vein collection authentication equipment, the finger vein image of gathering through first camera, second camera is two ascending three-dimensional images, compares with the finger vein information acquisition device that adopts single camera to gather finger vein image at present, and the finger vein image of current collection only has the two-dimensional image of a direction, and the utility model discloses the finger vein image of gathering is two ascending three-dimensional images in direction, the utility model discloses the image of gathering has more characteristic points, can be more convenient carry out the feature extraction to increase the discernment rate of accuracy, reduce and accept false rate and refuse the rate. The utility model provides a pair of two mesh three-dimensional finger vein collection authentication equipment still has the effect of preventing to make a fake, if the criminal uses paper or other planar thing simulation fingers the utility model provides a device can discover the problem very easily.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of a binocular stereoscopic finger vein collection and authentication device provided in an embodiment of the present invention;
fig. 2 is a block diagram of another binocular stereoscopic finger vein collection and authentication apparatus provided in the embodiment of the present invention;
fig. 3 is a block diagram of another binocular stereoscopic finger vein collecting and authenticating device provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a binocular stereoscopic finger vein collection and authentication device provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram ii of the binocular stereoscopic finger vein collection and authentication device provided by the embodiment of the utility model.
In the figure: 1. a finger sensing area; 11. touching a key; 2. a first camera; 3. a second camera; 4. a controller; 5. a light supplement lamp source; 6. a power supply; 7. an external interface; 8. a housing; 81. collecting a window; 9. a slider.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4 together, a binocular stereoscopic finger vein collecting and authenticating device provided by the present invention will now be described. The binocular stereoscopic finger vein acquisition and authentication equipment comprises a finger sensing area 1, a first camera 2, a second camera 3, a controller 4 and a light supplement lamp source 5, wherein the first camera 2 is used for acquiring a front image of a finger; the second camera 3 is used for collecting side images of fingers; the controller 4 is respectively electrically connected with the finger sensing area 1, the first camera 2 and the second camera 3 and is used for receiving and processing image information captured by the first camera 2 and the second camera 3; the light supplement lamp source 5 is electrically connected with the controller 4 and used for dynamically adjusting the illumination intensity according to the quality of the image information.
When carrying out the authentication, the finger is responded to by finger induction zone 1 through finger induction zone 1, finger induction zone 1 transmits sensing signal for controller 4, controller 4 control first camera 2, second camera 3 carries out image acquisition to the vein of finger from the front of finger and side respectively, in this process, light filling lamp source 5 can constantly be according to image information's quality dynamic adjustment illumination intensity, then controller 4 fuses the image information who obtains, thereby obtain finger vein stereoimage, through contrasting with the original image of prestoring, realize identification, output recognition result.
The utility model provides a pair of three-dimensional finger vein of two meshes gathers authentication equipment compares with prior art, and the finger vein image of gathering through first camera 2, second camera 3 is two ascending three-dimensional images, compares with the finger vein information acquisition device that adopts single camera to gather finger vein image at present, and the finger vein image of current collection only has the two-dimensional image of a direction, and the utility model discloses the finger vein image of gathering is two ascending three-dimensional images, the utility model discloses the image of gathering has more characteristic points, can be more convenient carry out the feature extraction to increase the discernment rate of accuracy, reduce and accept false rate and refuse true rate. The utility model provides a pair of two mesh three-dimensional finger vein collection authentication equipment still has the effect of preventing to make a fake, if the criminal uses paper or other planar thing simulation fingers the utility model provides a device can discover the problem very easily.
In this embodiment, the connection of two cameras adopts 8-bit parallel port cameras to directly connect, controls picture caching through FIFO chip AL422B to there is enough space to handle the image conveniently, and two camera control methods are the same, control respectively through different IO.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to fig. 4, the finger sensing area 1 is provided with a touch button 11, and the touch button 11 is electrically connected to the controller 4.
In this embodiment, two touch keys 11 are provided, and the two touch keys 11 are electrically connected with the controller 4 through a single-way and gate chip.
In this embodiment, the touch key 11 is controlled by using the single-point touch chip TTP223, and two points are required to be triggered simultaneously during triggering, so that the outputs of the two touch keys 11 are input to the 23 pin of the controller 4 through the one-way and gate chip 74AHC1G08 through operation, and the 23 pin can be used for interrupt and wake-up.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4 together, the binocular stereoscopic finger vein collecting and authenticating device further includes a power supply 6 for supplying power to the whole device; the power supply 6 comprises an adjustable power supply electrically connected with the light supplementing lamp source 5, and the adjustable power supply is electrically connected with the controller 4 by means of a digital potentiometer.
In the embodiment, the power supply 6 part uses AMS1117-33 to supply 3.3V power to the whole circuit, and uses RT9013-18 to supply 1.8V power to the whole circuit.
In this embodiment, the fill-in light source 5 is an infrared fill-in light.
In the present embodiment, the first camera 2 and the second camera 3 are electrically connected to the controller via ethernet or/and USB. The device-related properties may be set in an ethernet http manner.
In this embodiment, the specific model of the adjustable power supply is AMS1117-ADJ adjustable power supply, the output voltage of the adjustable power supply is determined by the voltage of an ADJ pin, a digital potentiometer is connected in series between the ADJ pin and the ground, and the resistance value of the digital potentiometer is adjusted by the controller 4 to influence the voltage of the ADJ pin, so that the problem of controlling the output voltage of the infrared supplementary lighting lamp is solved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4 together, the binocular stereoscopic finger vein collecting and authenticating device further includes an external interface 7 electrically connected to the controller 4. The external interface 7 can be connected with external structure modules such as an expansion card and a voice reminding module, and the arrangement of the external interface 7 facilitates the expansion of the functions of the binocular three-dimensional finger vein acquisition authentication equipment.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to fig. 4, and the controller 4 is an STM32F407VGT6 processor.
As a specific implementation manner of the embodiment of the present invention, the binocular stereoscopic finger vein collection and authentication device further includes an indicator light electrically connected to the controller 4 for indicating whether a finger is placed at a correct position;
the indicator lamp is electrically connected to the power supply 6.
When the finger is correctly placed, the indicator light is turned off and is always on when the finger is not used.
As a specific implementation manner of the embodiment of the utility model, this two mesh three-dimensional finger vein collection authentication equipment still includes fuselage pilot lamp or/and bee calling organ be connected with 4 electricity in controller. Whether the verification and the collection of the equipment are successful or not is prompted through the sound of the buzzer; whether the verification and the collection are successful or not is prompted through the indicating lamp of the machine body.
The device has the functions of collecting finger veins and verifying the finger veins in different setting modes, wherein the collection refers to collecting binocular images of the finger veins, the verification refers to collecting firstly and then comparing, and finally outputting a comparison result.
It should be noted that the body indicator light and/or the buzzer are electrically connected to the power supply 6, respectively.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4 together, the binocular stereoscopic finger vein collection authentication device further includes a housing 8, a collection window 81 for accommodating a finger is disposed on the housing 8, the first camera 2 is disposed on any sidewall of the collection window 81, and the second camera 3 is disposed on another sidewall of the collection window 81.
In this embodiment, the side wall of the acquisition window 81 where the first camera 2 is not disposed is provided with a slide rail communicated with the side wall, the second camera 3 is slidably connected with the slide rail by means of the sliding part 9, and the sliding part 9 is electrically connected with the controller 4.
In this embodiment, the sliding member 9 includes a structure such as an electric pulley and an electric push rod, and the structure of the sliding member 9 is not exclusive as long as the sliding member can move along the sliding rail under the action of the controller 4.
In this embodiment, the shape of the collection window 81 is an arc, the first camera 2 is disposed on the plane of the collection window 81, the second camera 3 is disposed on the arc-shaped surface of the collection window 81, and the slide rail is disposed in an arc shape along the arc-shaped surface of the collection window 81.
In this embodiment, the finger sensing area 1 is disposed in the collection window 81, and the finger sensing area 1 and the first camera 2 are disposed on the sidewall of the same collection window 81. When the finger triggers finger induction zone 1, can be made a video recording by first camera 2 simultaneously, improved this binocular three-dimensional finger vein collection authentication equipment's response efficiency, this binocular three-dimensional finger vein collection authentication equipment still has compact structure, and occupation space is small characteristics.
In this embodiment, the buzzer, the body indicator light, and the external interface 7 are respectively disposed on the housing 8, and the indicator light is disposed in the collection window 81. The controller 4 and the power supply 6 are embedded in the shell 8.
In this embodiment, the fill-in light source 5 is connected to the second camera 3. The light filling lamp source 5 can move along with the movement of the second camera 3, the light emitting center of the light filling lamp source 5 also moves along with the movement, light can be transmitted comprehensively, and the quality of collected finger vein images is improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a binocular stereoscopic finger vein gathers authentication equipment which characterized in that includes:
a finger sensing area;
the first camera is used for collecting a front image of a finger;
the second camera is used for collecting a side image of the finger;
the controller is respectively electrically connected with the finger sensing area, the first camera and the second camera and is used for receiving and processing image information captured by the first camera and the second camera; and
and the light supplement lamp source is electrically connected with the controller and is used for dynamically adjusting the illumination intensity according to the quality of the image information.
2. The binocular stereo finger vein collection authentication apparatus of claim 1, wherein: the finger induction area is provided with a touch key, and the touch key is electrically connected with the controller.
3. The binocular stereo finger vein collection authentication apparatus of claim 2, wherein: the touch keys are two and are electrically connected with the controller through a single-way door chip.
4. The binocular stereo finger vein collection authentication device of claim 3, wherein: the power supply is used for supplying power to the whole equipment; the power supply comprises an adjustable power supply electrically connected with the light supplementing lamp source, and the adjustable power supply is electrically connected with the controller by means of a digital potentiometer.
5. The binocular stereo finger vein collection authentication device of claim 4, wherein: the controller also comprises an external interface electrically connected with the controller.
6. The binocular stereo finger vein collection authentication apparatus of claim 5, wherein: the controller is an STM32F407VGT6 processor.
7. The binocular stereoscopic finger vein collection authentication device according to claim 6, further comprising an indicator light electrically connected to the controller for indicating whether a finger is placed at a correct position.
8. The binocular stereo finger vein collection authentication device according to claim 7, further comprising a body indicator light or/and a buzzer electrically connected with the controller.
9. The binocular stereo finger vein collection authentication apparatus of claim 8, wherein: still including being used for the shell, be equipped with the collection window that is used for holding the finger on the shell, first camera set up in on the arbitrary lateral wall of collection window, the second camera set up in with on another lateral wall of collection window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021378484.0U CN212135464U (en) | 2020-07-14 | 2020-07-14 | Binocular three-dimensional finger vein acquisition and authentication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021378484.0U CN212135464U (en) | 2020-07-14 | 2020-07-14 | Binocular three-dimensional finger vein acquisition and authentication equipment |
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| Publication Number | Publication Date |
|---|---|
| CN212135464U true CN212135464U (en) | 2020-12-11 |
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|---|---|---|---|
| CN202021378484.0U Expired - Fee Related CN212135464U (en) | 2020-07-14 | 2020-07-14 | Binocular three-dimensional finger vein acquisition and authentication equipment |
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| Country | Link |
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| CN (1) | CN212135464U (en) |
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2020
- 2020-07-14 CN CN202021378484.0U patent/CN212135464U/en not_active Expired - Fee Related
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Granted publication date: 20201211 |