CN112861815A - Biometric acquisition device and biometric recognition system - Google Patents
Biometric acquisition device and biometric recognition system Download PDFInfo
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- CN112861815A CN112861815A CN202110336721.XA CN202110336721A CN112861815A CN 112861815 A CN112861815 A CN 112861815A CN 202110336721 A CN202110336721 A CN 202110336721A CN 112861815 A CN112861815 A CN 112861815A
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- 210000003462 vein Anatomy 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000001678 irradiating effect Effects 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims description 37
- 238000004891 communication Methods 0.000 claims description 31
- 238000001514 detection method Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 210000000554 iris Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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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
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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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
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/14—Vascular patterns
Abstract
The application provides a biological feature collection system and biological feature identification system, the device includes: the supporting piece is used for supporting the finger to be scanned; the first light source is used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the support piece and used for emitting visible light and irradiating the finger to be scanned; the image acquisition assembly is positioned on one side of the support piece and positioned on the same side with the second light source and used for receiving transmission light to generate a finger vein image or receiving reflection light to generate a finger cross-striation image, the transmission light is light formed by infrared light penetrating through a finger to be scanned, and the reflection light is light reflected by a visible light passing through the finger to be scanned. The biological characteristic acquisition device solves the problem of inaccurate biological characteristic identification in the prior art.
Description
Technical Field
The application relates to the technical field of biological feature recognition, in particular to a biological feature acquisition device and a biological feature recognition system.
Background
With the continuous development of society, the security requirements of people on personal information are continuously improved, and the selection of a reasonable identity recognition technology is a necessary factor for ensuring the rapid development of society. Early technologies identified through passwords, smart cards and the like, but the passwords were cracked and the smart cards were copied with higher probability, and higher potential safety hazards existed, so that biometric identification technologies came into force. The biological characteristic recognition is that a computer identifies the identity by utilizing the inherent physiological characteristics of a human body, and mainly comprises the technologies of transverse striation, face recognition, finger veins, irises and the like. Since the biometric identification has the advantages of being not easy to lose, counterfeit and carry about, the biometric identification is applied to various fields such as security monitoring, electronic government affairs and electronic commerce.
Although the existing biological recognition methods are numerous, the single mode has some disadvantages, such as easy damage of the transverse striation, low accuracy of face recognition, poor stability of finger veins and low reliability of iris. In real life, a single-mode biometric identification mode still has a few problems.
In summary, although there are many biometric methods, there is no consideration of fusing them together, so that the extracted biometric information is not accurate enough.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The application mainly aims to provide a biological feature acquisition device and a biological feature recognition system so as to solve the problem of inaccurate biological feature recognition in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a biometric acquisition apparatus including: the supporting piece is used for supporting the finger to be scanned; the first light source is displaced on one side of the supporting piece and used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned; the image acquisition assembly is positioned on one side of the support piece and positioned on the same side with the second light source and used for receiving transmission light to generate a finger vein image or receiving reflected light to generate a finger cross-striation image, the transmission light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned.
Optionally, the image acquisition assembly comprises: a lens located on one side of the support member and on the same side as the second light source, the lens being configured to collect the transmitted light and the reflected light; the image sensor is positioned on one side of the lens far away from the support piece and used for receiving the collected transmitted light to generate a first analog electric signal or receiving the collected reflected light to generate a second analog electric signal; the digital-to-analog converter is in communication connection with the image sensor and is used for converting the first analog electric signal into a first digital image signal or converting the second analog electric signal into a second digital image signal; and the signal processing chip is in communication connection with the digital-to-analog converter and is used for processing the first digital image signal to obtain the finger vein image or processing the second digital image signal to obtain the cross-fingerprint image.
Optionally, the signal processing chip includes: the first control module is electrically connected with the first light source and is used for controlling the switch of the first light source; and the second control module is electrically connected with the second light source and is used for controlling the switch of the second light source.
Optionally, the signal processing chip further includes: the first detection module is in communication connection with the digital-to-analog converter and is used for detecting the brightness of the finger vein image; and the third control module is in communication connection with the first detection module and the first light source and is used for adjusting the power of the first light source according to the brightness.
Optionally, the third control module comprises: a determination sub-module, communicatively coupled to the first detection module, for determining whether the brightness is within a predetermined range; a first control sub-module communicatively coupled to the determination sub-module, the first control sub-module configured to adjust the power of the first light source if the brightness is not within a predetermined range; a second control sub-module communicatively coupled to the determination sub-module, the second control sub-module configured to stop adjusting the power of the first light source if the brightness is within the predetermined range.
Optionally, the signal processing chip further includes: the second detection module is in communication connection with the digital-to-analog converter and is used for detecting the quality of the fingerprint and horizontal stripe image; and the prompting module is in communication connection with the second detection module and is used for prompting that the finger is replaced under the condition that the quality of the finger transverse stripe image does not meet the target requirement.
Optionally, the signal processing chip further includes: the image generation module is in communication connection with the digital-to-analog converter and is used for processing the first digital image signal to obtain the finger vein image or processing the second digital image signal to obtain the finger horizontal stripe image; the image processing module is in communication connection with the image generation module and is used for cutting and compressing the finger vein image and the finger horizontal line image to obtain an image to be transmitted, and the image to be transmitted comprises the cut and compressed finger vein image and the finger horizontal line image; the encryption module is in communication connection with the image processing module and is used for encrypting the image to be transmitted to obtain an encrypted image; and the transmission module is in communication connection with the encryption module and is used for sending the encrypted image to image identification equipment.
Optionally, the apparatus further comprises: a first frame body having a first accommodating chamber in which the first light source and the support member are located, the first frame body having an opening for allowing the finger to be scanned to be placed on the support member through the opening; the second frame body is connected with the first frame body and provided with a second accommodating cavity, the second light source and the image acquisition assembly are located in the second accommodating cavity, and the second frame body is of a sealing structure.
Optionally, the apparatus further comprises: and the connecting piece is used for connecting the first frame body and the second frame body and is transparent.
Optionally, the apparatus further comprises: and the light shield is connected with the first frame body and used for covering at least part of the opening of the first frame body.
Optionally, the apparatus further comprises: the light gathering rod is located between the first light source and the supporting piece and used for gathering the infrared light, so that the gathered infrared light irradiates on the finger to be scanned.
According to another aspect of the present application, there is provided a biometric identification system including a biometric acquisition device and an image recognition apparatus, the biometric acquisition device being any one of the biometric acquisition devices.
By applying the technical scheme of the application, in the biological characteristic acquisition device, the supporting piece is used for supporting the finger to be scanned; a first light source which is displaced to one side of the supporting piece and is used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned; and an image acquisition assembly, which is located on one side of the support and on the same side as the second light source, and is configured to receive transmitted light to generate a finger vein image, or receive reflected light to generate a finger cross-print image, where the transmitted light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned. The biological characteristic acquisition device acquires infrared light transmitted by a finger to be scanned through the image acquisition assembly to generate a finger vein image, acquires visible light reflected by the finger to be scanned to generate a finger transverse stripe image, so that the biological characteristic acquisition device can acquire two biological characteristics of a finger vein and a finger transverse stripe, and can identify through the finger vein image and the finger transverse stripe image, thereby improving the accuracy of biological characteristic identification and solving the problem of inaccurate biological characteristic identification in the prior art. Moreover, the acquisition device realizes the acquisition of the finger vein image and the finger transverse stripe image in the same structure, and greatly reduces the volume of the equipment.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a schematic view of a biometric acquisition apparatus according to an embodiment of the present application;
fig. 2 illustrates a side view of a biometric acquisition device according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
01. a finger to be scanned; 10. a support member; 20. a first light source; 30. a second light source; 40. an image acquisition component; 41. a lens; 42. an image sensor; 50. a first frame body; 60. a second frame body; 70. a connecting member; 80. a light shield; 90. a light-gathering rod.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background, in the prior art, biometric recognition is inaccurate, and in order to solve the above problem, the present application proposes a biometric acquisition apparatus and a biometric recognition system.
According to an embodiment of the present application, there is provided a biometric acquisition apparatus, as shown in fig. 1, including:
a support 10 for supporting a finger to be scanned;
a first light source 20, which is displaced to one side of the supporting member 10, for emitting infrared light and irradiating the finger 01 to be scanned;
a second light source 30, located on the other side of the supporting member 10, for emitting visible light to irradiate the finger to be scanned 01;
an image capturing assembly 40, located on one side of the supporting member 10 and on the same side as the second light source 30, for receiving a transmitted light to generate a finger vein image or a reflected light to generate a finger cross-print image, where the transmitted light is a light formed by the infrared light penetrating through the finger 01 to be scanned, and the reflected light is a light reflected by the visible light passing through the finger 01 to be scanned.
In the above biological characteristic acquisition apparatus, the support member is used for supporting the finger to be scanned; a first light source which is displaced to one side of the supporting piece and is used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned; and an image acquisition assembly, which is located on one side of the support and on the same side as the second light source, and is configured to receive transmitted light to generate a finger vein image, or receive reflected light to generate a finger cross-print image, where the transmitted light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned. The biological characteristic acquisition device acquires infrared light transmitted by a finger to be scanned through the image acquisition assembly to generate a finger vein image, acquires visible light reflected by the finger to be scanned to generate a finger transverse stripe image, so that the biological characteristic acquisition device can acquire two biological characteristics of a finger vein and a finger transverse stripe, and can identify through the finger vein image and the finger transverse stripe image, thereby improving the accuracy of biological characteristic identification and solving the problem of inaccurate biological characteristic identification in the prior art. Moreover, the acquisition device realizes the acquisition of the finger vein image and the finger transverse stripe image in the same structure, and greatly reduces the volume of the equipment.
In an embodiment of the present application, as shown in fig. 1, the image capturing assembly 40 includes a lens 41, an image sensor 42, a digital-to-analog converter and a signal processing chip, wherein the lens 41 is located at one side of the supporting member 10 and at the same side as the second light source 30, and the lens 41 is used for collecting the transmitted light and the reflected light; an image sensor 42 is located on a side of the lens 41 away from the support 10, the image sensor 42 is configured to receive the collected transmitted light to generate a first analog electrical signal, or receive the collected reflected light to generate a second analog electrical signal; the digital-to-analog converter is in communication connection with the image sensor and is used for converting the first analog electric signal into a first digital image signal or converting the second analog electric signal into a second digital image signal; the signal processing chip is in communication connection with the digital-to-analog converter, and is used for processing the first digital image signal to obtain the finger vein image or processing the second digital image signal to obtain the transverse fingerprint image. Specifically, the acquisition process of the finger vein image is that infrared light emitted by a first light source penetrates through a finger to be scanned to form transmission light, a lens collects the transmission light and irradiates the transmission light on an image sensor, so that a first analog electric signal is generated, a digital-to-analog converter converts the first analog electric signal into a first digital image signal, a signal processing chip processes the first digital image signal to obtain a finger vein image, the acquisition process of the finger transverse streak image is that visible light emitted by a second light source irradiates the finger to be scanned to form reflection light, the lens collects the reflection light and irradiates the image sensor, so that a second analog electric signal is generated, the digital-to-analog converter converts the second analog electric signal into a second digital image signal, and the signal processing chip processes the second digital image signal to obtain the finger transverse streak image.
It should be noted that the shooting areas of the finger veins and the finger striations are actually different, the finger veins are vein information inside the finger, and the finger striations are finger striations on the surface of the finger, so that the lens has higher requirements for the lens, and a wide-angle lens with high depth of field is used to ensure that clear and complete images can be formed on the surface of the finger and inside the finger.
In an embodiment of the present application, the signal processing chip includes a first control module and a second control module, wherein the first control module is electrically connected to the first light source, and the first control module is configured to control a switch of the first light source; the second control module is electrically connected with the second light source and is used for controlling the switch of the second light source. Specifically, the signal processing chip controls the on-off of the first light source and the second light source, so that when the first light source or the second light source is started, other electrical elements are started, the normal collection of the finger vein image and the finger transverse stripe image is ensured, and the power consumption is reduced.
In an embodiment of the present application, the signal processing chip further includes a first detection module and a third control module, where the first detection module is in communication connection with the digital-to-analog converter, and the first detection module is configured to detect brightness of the finger vein image; the third control module is in communication connection with the first detection module and the first light source, and the third control module is used for adjusting the power of the first light source according to the brightness. Specifically, the finger thickness of each person is different, so as to prevent the image from being overexposed or excessively dark, the brightness of the transmission light source needs to be automatically adjusted according to the finger thickness, and in addition, the relationship between the collected finger cross-striation information on the finger surface and the finger thickness is not large, so that the visible light reflection light source is fixed in brightness and does not need to be adjusted in brightness.
In an embodiment of the present application, the third control module includes a determination sub-module, a first control sub-module, and a second control sub-module, wherein the determination sub-module is communicatively connected to the first detection module, and the determination sub-module is configured to determine whether the brightness is within a predetermined range; a first control submodule in communication with the determination submodule, the first control submodule configured to adjust the power of the first light source if the brightness is not within a predetermined range; a second control sub-module communicatively coupled to the determination sub-module, the second control sub-module configured to stop adjusting the power of the first light source if the brightness is within the predetermined range. Specifically, after an initial value is set to acquire an image, the image processing module may determine whether the brightness of the image is within a predetermined range, such as dark or bright, adjust the power of the first light source, increase or decrease the duty ratio of the transmission light source, and adjust the brightness to a proper brightness after continuous adjustment.
In an embodiment of the present application, the signal processing chip further includes a second detection module and a prompt module, where the second detection module is in communication connection with the digital-to-analog converter, and the second detection module is configured to detect quality of the image of the cross-fingerprint; the prompting module is in communication connection with the second detection module and is used for prompting to reposition the finger when the quality of the finger transverse striation image does not meet the target requirement. Specifically, the target requirement is based on whether the outline of the finger is in the image range, if no finger part exists in the image range or the finger part is small, the finger vein image quality is considered to be unqualified, and the finger is prompted to be replaced until the finger is placed at the correct position.
In an embodiment of the present application, the signal processing chip further includes an image generating module, an image processing module, an encrypting module and a transmitting module, where the image generating module is in communication connection with the digital-to-analog converter, and the image generating module is configured to process the first digital image signal to obtain the finger vein image, or process the second digital image signal to obtain the finger horizontal streak image; the image processing module is in communication connection with the image generation module and is used for cutting and compressing the finger vein image and the finger horizontal line image to obtain an image to be transmitted, and the image to be transmitted comprises the cut and compressed finger vein image and the finger horizontal line image; the encryption module is in communication connection with the image processing module and is used for encrypting the image to be transmitted to obtain an encrypted image; and the transmission module is in communication connection with the encryption module and is used for sending the encrypted image to the image identification device. Specifically, the image generation module processes the first digital image signal to obtain the finger vein image, or processes the second digital image signal to obtain the finger horizontal line image, then cuts and compresses the finger vein and finger horizontal line image, the images can be cut according to the actual size of the finger area, the vein image and finger horizontal line image are compressed after cutting, the transmission amount of data is greatly reduced, in addition, the images can be smoothly processed through an algorithm to facilitate image comparison in the identification process, before image transmission, the images to be transmitted are encrypted by adopting encryption algorithms such as SM2 and SM4, correct information can be obtained through decryption on other peripheral equipment, so as to prevent information leakage and ensure information safety, the transmission module is connected with other peripheral equipment through a USB interface, and other equipment can be a computer, And the terminal and other peripheral equipment perform the work of comparing the finger vein image and the finger horizontal line image, identifying and authenticating and the like.
In one embodiment of the present application, as shown in fig. 1, the apparatus further includes a first frame 50 and a second frame 60, wherein the first frame 50 has a first accommodating cavity, the first light source 20 and the supporting member 10 are located in the first accommodating cavity, the first frame 50 has an opening, and the opening is used for allowing the finger 01 to be scanned to be placed on the supporting member 10 through the opening; the second housing 60 is connected to the first housing 50, the second housing 60 has a second receiving cavity, the second light source 30 and the image capturing unit 40 are located in the second receiving cavity, and the second housing 60 is a sealing structure. Specifically, the first frame and the second frame form a double-side supporting structure, the first frame and the second frame are used for supporting and protecting the first light source, the supporting piece, the second light source and the image acquisition assembly, and the first frame and the second frame are detachably connected to facilitate maintenance.
In an embodiment of the present invention, as shown in fig. 1, the apparatus further includes a connector 70, the connector 70 is used to connect the first frame 50 and the second frame 60, and the connector 70 is transparent. Specifically, above-mentioned connecting piece is the glass piece to the transmission light passes the glass piece and is received by the camera lens, blocks external debris, and the protection first framework and the inside environment of second framework are clean, avoid polluting devices such as camera lens.
In an embodiment of the present invention, as shown in fig. 2, the apparatus further includes a light shield 80 connected to the first frame 50, wherein the light shield 80 is used for covering at least a portion of the opening of the first frame 50. Specifically, above-mentioned lens hood is the elasticity lens hood, can strut and withdraw according to the circumstances, can block the influence that the corresponding image acquisition of external light, improve image acquisition's quality, when external light is more weak promptly, first framework and second framework form two side bearing structure and can block external light, the optional elasticity lens hood of closing this moment, if external light is too strong, two side bearing structure of itself can not block external light, the optional elasticity lens hood of opening this moment, the elasticity lens hood is light-tight material, can effectively block visible light and infrared light, the elasticity lens hood can fold when not using and pack up, the volume of the reduction equipment that can be great.
In an embodiment of the present invention, as shown in fig. 1, the apparatus further includes a light collecting rod 90, the light collecting rod 90 is located between the first light source 20 and the supporting member 10, and the light collecting rod 90 is configured to collect the infrared light, so that the collected infrared light is irradiated on the finger 01 to be scanned. Specifically, the first light source is an infrared light source and has divergence, and the light-gathering rod can gather and irradiate infrared light on the surface of the finger, so that the definition of the finger vein image is enhanced.
In an embodiment of the present application, the second light source is a cold light source. Specifically, the cold light source is as novel luminescent material, has the space little, the low power dissipation, and long-lived, safe and reliable's advantage uses traditional light source to occupy the space too, and the equipment miniaturization requirement of having satisfied of plane cold light source, and plane cold light source can not end like traditional light source life-span suddenly, can slowly decay at the in-process luminance that uses, the equipment maintenance of being convenient for.
In an embodiment of the present application, there are a plurality of the second light sources, and the plurality of the second light sources are disposed around the image capturing assembly. Specifically, a plurality of above-mentioned second light sources set up around above-mentioned image acquisition subassembly, avoid treating that the finger's of scanning cross striation image acquisition is incomplete, guarantee image quality.
According to an embodiment of the present application, there is also provided a biometric identification system, including a biometric acquisition device and an image identification device, where the biometric acquisition device is any one of the biometric acquisition devices.
The biological characteristic identification system comprises a biological characteristic acquisition device, an image identification device and a support piece, wherein the support piece is used for supporting a finger to be scanned; a first light source which is displaced to one side of the supporting piece and is used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned; and an image acquisition assembly, which is located on one side of the support and on the same side as the second light source, and is configured to receive transmitted light to generate a finger vein image, or receive reflected light to generate a finger cross-print image, where the transmitted light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned. The biological characteristic identification system collects the infrared light which is transmitted through the finger to be scanned through the image collection assembly to generate a finger vein image, collects the visible light which reflects the finger to be scanned to generate a finger transverse stripe image, so that the biological characteristic collection device can collect two biological characteristics of the finger vein and the finger transverse stripe image, the identification can be carried out through the finger vein image and the finger transverse stripe image, the accuracy of biological characteristic identification is improved, and the problem of inaccurate biological characteristic identification in the prior art is solved.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) in the biological characteristic acquisition device, the supporting piece is used for supporting the finger to be scanned; a first light source which is displaced to one side of the supporting piece and is used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned; and an image acquisition assembly, which is located on one side of the support and on the same side as the second light source, and is configured to receive transmitted light to generate a finger vein image, or receive reflected light to generate a finger cross-print image, where the transmitted light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned. The biological characteristic acquisition device acquires infrared light transmitted by a finger to be scanned through the image acquisition assembly to generate a finger vein image, acquires visible light reflected by the finger to be scanned to generate a finger transverse stripe image, so that the biological characteristic acquisition device can acquire two biological characteristics of a finger vein and a finger transverse stripe, and can identify through the finger vein image and the finger transverse stripe image, thereby improving the accuracy of biological characteristic identification and solving the problem of inaccurate biological characteristic identification in the prior art.
2) The biological characteristic identification system comprises a biological characteristic acquisition device, an image identification device and a support piece, wherein the support piece is used for supporting a finger to be scanned; a first light source which is displaced to one side of the supporting piece and is used for emitting infrared light and irradiating the finger to be scanned; the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned; and an image acquisition assembly, which is located on one side of the support and on the same side as the second light source, and is configured to receive transmitted light to generate a finger vein image, or receive reflected light to generate a finger cross-print image, where the transmitted light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned. The biological characteristic identification system collects the infrared light which is transmitted through the finger to be scanned through the image collection assembly to generate a finger vein image, collects the visible light which reflects the finger to be scanned to generate a finger transverse stripe image, so that the biological characteristic collection device can collect two biological characteristics of the finger vein and the finger transverse stripe image, the identification can be carried out through the finger vein image and the finger transverse stripe image, the accuracy of biological characteristic identification is improved, and the problem of inaccurate biological characteristic identification in the prior art is solved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A biometric acquisition device, comprising:
the supporting piece is used for supporting the finger to be scanned;
the first light source is displaced on one side of the supporting piece and used for emitting infrared light and irradiating the finger to be scanned;
the second light source is positioned on the other side of the supporting piece and used for emitting visible light and irradiating the finger to be scanned;
the image acquisition assembly is positioned on one side of the support piece and positioned on the same side with the second light source and used for receiving transmission light to generate a finger vein image or receiving reflected light to generate a finger cross-striation image, the transmission light is light formed by the infrared light penetrating through the finger to be scanned, and the reflected light is light reflected by the visible light passing through the finger to be scanned.
2. The apparatus of claim 1, wherein the image acquisition assembly comprises:
a lens located on one side of the support member and on the same side as the second light source, the lens being configured to collect the transmitted light and the reflected light;
the image sensor is positioned on one side of the lens far away from the support piece and used for receiving the collected transmitted light to generate a first analog electric signal or receiving the collected reflected light to generate a second analog electric signal;
the digital-to-analog converter is in communication connection with the image sensor and is used for converting the first analog electric signal into a first digital image signal or converting the second analog electric signal into a second digital image signal;
and the signal processing chip is in communication connection with the digital-to-analog converter and is used for processing the first digital image signal to obtain the finger vein image or processing the second digital image signal to obtain the cross-fingerprint image.
3. The apparatus of claim 2, wherein the signal processing chip comprises:
the first control module is electrically connected with the first light source and is used for controlling the switch of the first light source;
and the second control module is electrically connected with the second light source and is used for controlling the switch of the second light source.
4. The apparatus of claim 2, wherein the signal processing chip further comprises:
the first detection module is in communication connection with the digital-to-analog converter and is used for detecting the brightness of the finger vein image;
and the third control module is in communication connection with the first detection module and the first light source and is used for adjusting the power of the first light source according to the brightness.
5. The apparatus of claim 4, wherein the third control module comprises:
a determination sub-module, communicatively coupled to the first detection module, for determining whether the brightness is within a predetermined range;
a first control sub-module communicatively coupled to the determination sub-module, the first control sub-module configured to adjust the power of the first light source if the brightness is not within a predetermined range;
a second control sub-module communicatively coupled to the determination sub-module, the second control sub-module configured to stop adjusting the power of the first light source if the brightness is within the predetermined range.
6. The apparatus of claim 2, wherein the signal processing chip further comprises:
the second detection module is in communication connection with the digital-to-analog converter and is used for detecting the quality of the fingerprint and horizontal stripe image;
and the prompting module is in communication connection with the second detection module and is used for prompting that the finger is replaced under the condition that the quality of the finger transverse stripe image does not meet the target requirement.
7. The apparatus of claim 2, wherein the signal processing chip further comprises:
the image generation module is in communication connection with the digital-to-analog converter and is used for processing the first digital image signal to obtain the finger vein image or processing the second digital image signal to obtain the finger horizontal stripe image;
the image processing module is in communication connection with the image generation module and is used for cutting and compressing the finger vein image and the finger horizontal line image to obtain an image to be transmitted, and the image to be transmitted comprises the cut and compressed finger vein image and the finger horizontal line image;
the encryption module is in communication connection with the image processing module and is used for encrypting the image to be transmitted to obtain an encrypted image;
and the transmission module is in communication connection with the encryption module and is used for sending the encrypted image to image identification equipment.
8. The apparatus of claim 1, further comprising:
a first frame body having a first accommodating chamber in which the first light source and the support member are located, the first frame body having an opening for allowing the finger to be scanned to be placed on the support member through the opening;
the second frame body is connected with the first frame body and provided with a second accommodating cavity, the second light source and the image acquisition assembly are located in the second accommodating cavity, and the second frame body is of a sealing structure.
9. The apparatus of claim 8, further comprising:
and the connecting piece is used for connecting the first frame body and the second frame body and is transparent.
10. The apparatus of claim 8, further comprising:
and the light shield is connected with the first frame body and used for covering at least part of the opening of the first frame body.
11. The apparatus of claim 1, further comprising:
the light gathering rod is located between the first light source and the supporting piece and used for gathering the infrared light, so that the gathered infrared light irradiates on the finger to be scanned.
12. A biometric identification system comprising a biometric acquisition device and an image recognition apparatus, wherein the biometric acquisition device is the biometric acquisition device of any one of claims 1 to 11.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185690A (en) * | 2013-03-27 | 2013-07-03 | 浙江大学 | Uniform irradiation method and device for spectral imaging detection of agricultural product |
| CN105678233A (en) * | 2015-12-30 | 2016-06-15 | 北京天诚盛业科技有限公司 | Composite identification method, apparatus and system based on fingerprint and finger vein |
| CN107808148A (en) * | 2017-11-17 | 2018-03-16 | 广州广电运通金融电子股份有限公司 | It is a kind of to gather the unit and method for referring to vein image |
| CN108491831A (en) * | 2018-05-21 | 2018-09-04 | 山西圣点世纪科技股份有限公司 | A kind of dorsal digital vein and refer to back of the body line Collect jointly identification device and method |
| CN109167927A (en) * | 2018-07-24 | 2019-01-08 | 吉利汽车研究院（宁波）有限公司 | A kind of driver monitors the control device and method of system illumination light source |
| CN109922047A (en) * | 2019-01-31 | 2019-06-21 | 武汉天喻聚联网络有限公司 | A kind of image delivering system and method |
| CN210091200U (en) * | 2019-07-29 | 2020-02-18 | 浙江宇视科技有限公司 | Finger vein and fingerprint identification equipment |
| CN215117553U (en) * | 2021-03-29 | 2021-12-10 | 威海华菱光电股份有限公司 | Biometric acquisition device and biometric recognition system |
-
2021
- 2021-03-29 CN CN202110336721.XA patent/CN112861815A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185690A (en) * | 2013-03-27 | 2013-07-03 | 浙江大学 | Uniform irradiation method and device for spectral imaging detection of agricultural product |
| CN105678233A (en) * | 2015-12-30 | 2016-06-15 | 北京天诚盛业科技有限公司 | Composite identification method, apparatus and system based on fingerprint and finger vein |
| CN107808148A (en) * | 2017-11-17 | 2018-03-16 | 广州广电运通金融电子股份有限公司 | It is a kind of to gather the unit and method for referring to vein image |
| CN108491831A (en) * | 2018-05-21 | 2018-09-04 | 山西圣点世纪科技股份有限公司 | A kind of dorsal digital vein and refer to back of the body line Collect jointly identification device and method |
| CN109167927A (en) * | 2018-07-24 | 2019-01-08 | 吉利汽车研究院（宁波）有限公司 | A kind of driver monitors the control device and method of system illumination light source |
| CN109922047A (en) * | 2019-01-31 | 2019-06-21 | 武汉天喻聚联网络有限公司 | A kind of image delivering system and method |
| CN210091200U (en) * | 2019-07-29 | 2020-02-18 | 浙江宇视科技有限公司 | Finger vein and fingerprint identification equipment |
| CN215117553U (en) * | 2021-03-29 | 2021-12-10 | 威海华菱光电股份有限公司 | Biometric acquisition device and biometric recognition system |
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