CN213844157U - Biological characteristic acquisition and identification system and terminal equipment - Google Patents

Abstract

The utility model discloses a biological characteristic acquisition and identification system and terminal equipment, the biological characteristic acquisition and identification system comprises an imaging subsystem and an acquisition and identification subsystem, the imaging subsystem comprises an imaging module and a detection module, the imaging module comprises a display and an optical component, and the detection module is used for sending an acquisition trigger signal; the acquisition and identification subsystem comprises an image acquisition module, an image storage module and an image processing module, wherein the image acquisition module comprises at least one image acquisition unit and a control unit, and the image acquisition unit is arranged on the imaging side of the optical assembly and used for responding to an acquisition trigger signal to acquire image information of a target object in an aerial target area; the image processing module is used for storing the processed biological characteristic information in the image storage module or identifying the identity of the user according to the processed biological characteristic information. The operation mode of the acquisition and identification system is more convenient, and the risk of contacting equipment during operation of a user can be avoided.

Description

Biological characteristic acquisition and identification system and terminal equipment

Technical Field

The utility model belongs to the technical field of the imaging identification technique and specifically relates to a biological feature gathers identification system and terminal equipment is related to.

Background

In the related art, a fingerprint identification system collects a fingerprint image by using a contact type optical sensor or a capacitance sensor, and performs fingerprint matching by using a minutiae-based matching algorithm. The minutiae matching algorithm is very sensitive to the quality of a fingerprint image, but the fingerprint image acquisition equipment based on the contact sensor cannot ensure the image quality and has the defects of small fingerprint acquisition area, low resolution, insufficient characteristic points and the like. Furthermore, this approach relies on physical contact between the finger and the fingerprint sensing device, but the requirement to use the finger on the scanner also raises hygiene concerns for the user.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a biometric identification system, which is more convenient in operation and can avoid the risk of contacting the device during the operation of the user.

The utility model discloses a second purpose lies in providing a terminal equipment.

In order to solve the above problem, the biometric feature collection and identification system according to an embodiment of the present invention includes an imaging subsystem and a collection and identification subsystem, the imaging subsystem includes an imaging module and a detection module, the imaging module includes a display for displaying a guiding picture of biometric feature collection and identification, an optical assembly for displaying the guiding picture of biometric feature collection and identification in an aerial target area in an imaging manner, and a main control unit connected to the display; the detection module is connected with the main control unit and used for sending an acquisition trigger signal when detecting that a target object exists in the aerial target area and the interaction posture of the target object and the guide picture conforms to the guide posture in the guide picture; the acquisition and identification subsystem comprises an image acquisition module, an image storage module and an image processing module, wherein the image acquisition module comprises at least one image acquisition unit and a control unit, the image acquisition unit is arranged on the imaging side of the optical assembly, the control unit is connected with the image acquisition unit and the main control unit, and the image acquisition unit is used for responding to the acquisition trigger signal and acquiring the image information of the target object in the aerial target area; the image storage module is used for storing the biological characteristic information; the image processing module is connected with the image acquisition module and the image storage module and is used for acquiring biological characteristic information or identifying the identity of a user according to the image information and the image information.

According to the utility model discloses biological characteristic gathers recognition system, based on the framework that imaging subsystem and collection recognition subsystem combine, combine aerial formation of image and non-contact biological characteristic recognition system promptly, realize the purpose to the non-contact collection discernment of user's biological characteristic, and the embodiment of the utility model provides an image the guide picture that shows the display to aerial target area through optical assembly, the user touches the guide picture of aerial target area, can trigger image acquisition module and carry out image information acquisition discernment, need not to set up extra restriction user operating means, and need not to contact the equipment body in the process of gathering the discernment to make the user safer, high-efficient when carrying out non-contact biological characteristic collection discernment operation; and the image acquisition unit is arranged at the imaging side of the optical assembly, so that the image information of the target object in the aerial imaging area can be acquired more easily, the image distortion is reduced, and the support is provided for the subsequent identification of the biological characteristic information.

In some embodiments, an optical axis of the image acquisition unit is at a predetermined angle to a normal of an imaging plane of the aerial target region.

In some embodiments, the imaging module further comprises: a beam splitter disposed on an imaging side of the optical assembly for reflecting image information of the airborne target area target object.

In some embodiments, an optical axis of the image acquisition unit is perpendicular to a normal of an imaging plane of the aerial target region; the beam splitter is a beam splitter which is semitransparent and semi-reflective to visible light.

In some embodiments, an optical axis of the image acquisition unit is perpendicular to a normal of an imaging plane of the aerial target region; the image acquisition unit is an infrared image acquisition unit; the beam splitter transmits visible light and reflects infrared light.

In some embodiments, the light incident side of the infrared image pickup unit is provided with a filter member that filters visible light.

In some embodiments, the beam splitter completely covers a surface of the optical assembly on the imaging side.

In some embodiments, the image acquisition module further comprises: and the at least one total reflection unit is used for carrying out total reflection on the image information of the target object in the air target area reflected by the beam splitter.

In some embodiments, the imaging module further comprises: a housing formed with a display window and an accommodation chamber therein; the display, the optical assembly and the main control unit are all arranged in the accommodating cavity, the display is arranged on the light source side of the optical assembly, and the display window is arranged on the imaging side of the optical assembly.

In some embodiments, the imaging module further comprises: the data processing module is connected with the main control unit and used for sending out guidance prompt information when the detection module detects that the posture of the target object is not in accordance with the guidance posture in the guidance picture; the main control unit is also used for controlling the display to display the guiding prompt information; the optical assembly converges and images the light rays of the guiding prompt information displayed by the display on the aerial target area.

In some embodiments, a light absorbing layer is disposed on an inner wall of the receiving cavity.

In order to achieve the above object, the embodiment of the present invention provides a terminal device, including: an apparatus body; the biological characteristic acquisition and identification system is arranged on the equipment body.

According to the utility model discloses terminal equipment, through adopting the biological characteristic collection identification system that above-mentioned embodiment provided, come to gather and discern user's biological characteristic information, the risk of contact means when can avoiding user operation, and need not to set up extra restriction user operating means to make non-contact fingerprint collection operation also safer, high-efficient.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a block diagram of a biometric acquisition and identification system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a biometric acquisition and identification system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a human-machine interaction according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a biometric acquisition and identification system according to another embodiment of the present invention;

fig. 5 is a schematic diagram of three image acquisition units for image information acquisition according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a feature extraction manner of three image capturing units according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a feature extraction manner of three image capturing units according to another embodiment of the present invention;

fig. 8 is a schematic diagram of an optical axis of an image capturing unit at a predetermined angle to a normal of an imaging plane of an aerial target area according to an embodiment of the present invention;

fig. 9 is a schematic view of an optical axis of an image acquisition unit perpendicular to a normal to an imaging plane of an aerial target area according to an embodiment of the present invention;

fig. 10 is a schematic diagram of image information collection using total reflection units according to an embodiment of the present invention;

fig. 11 is a block diagram of a terminal device according to an embodiment of the present invention.

Reference numerals:

a terminal device 2000;

a biometric acquisition and identification system 1000; an apparatus body 300;

an imaging subsystem 100; an acquisition and identification subsystem 200;

an imaging module 110; a detection module 120; an image acquisition module 210; an image processing module 220; an image storage module 230; an aerial target area 11; a data processing module 111;

a housing 10; a display 20; an optical component 30; a main control unit 40; a display window 1; a housing chamber 2;

an image acquisition unit 21; a control unit 22; a beam splitter 31; a filter member 24; a total reflection unit 25.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

In order to solve the above problem, the biometric feature collection and identification system provided according to an embodiment of the first aspect of the present invention is described below with reference to the drawings, and the biometric feature collection and identification system is more convenient to operate and can avoid the risk of the user contacting the device during operation.

Fig. 1 is a block diagram illustrating a biometric feature collection and recognition system 1000 according to an embodiment of the present invention, in which the biometric feature collection and recognition system 1000 includes an imaging subsystem 100 and a collection and recognition subsystem 200. The biological characteristics of the embodiment of the present invention may be common physiological characteristics of human body such as fingerprints, facial appearance, palm prints, iris, etc.

The imaging subsystem 100 includes, among other things, an imaging module 110 and a detection module 120. The imaging module 110 is configured to image and display the guiding picture identified by the biometric feature acquisition in the target area in the air; the detection module 120 is configured to send an acquisition trigger signal when it is detected that a target object exists in the aerial target area and interacts with the guidance picture, and the posture of the target object conforms to the guidance posture in the guidance picture.

The acquisition recognition subsystem 200 includes an image acquisition module 210, an image processing module 220, and an image storage module 230. The image acquisition module 210 is configured to respond to an acquisition trigger signal and acquire image information of a target object in an aerial target area, and an acquisition area of the image acquisition module 210 covers a three-dimensional space where the aerial target area is located; the image storage module 230 is used for storing the biological characteristic information; the image processing module 220 is connected to the image capturing module 210 and the image storing module 230, and is configured to obtain biometric information or identify a user identity according to the image information, for example, perform biometric processing according to the captured image information, store the processed biometric information in the image storing module 230, or compare the processed biometric information with the biometric information stored in the image storing module 230 to identify the user identity.

The embodiment of the utility model provides an in, through imaging module 110 with the guide picture formation of image of biological feature collection discernment in aerial target area, detection module 120 is when the guide gesture that detects the target object in the gesture accords with the guide picture, send and gather trigger signal to image acquisition module 210, image acquisition module 210 is in response to gathering trigger signal, gather the image information of target object in the aerial target area, image processing module 220 carries out biological feature processing according to this image information, image storage module 230 stores the biological feature information after image processing module 220 handles. That is, the embodiment of the utility model provides a biological characteristic collection identification system 1000 adopts and carries out biological characteristic collection and identification with the mode that can mutual aerial imaging technique and non-contact biological characteristic collection identification technique combine together.

Preferably, the biometric feature acquisition identification in the present embodiment may be fingerprint acquisition identification, and the biometric feature information may be fingerprint information. The imaging subsystem 100 images the displayed guidance picture in the aerial target area, and the position of the guidance picture is relatively fixed, so that the user can directly interact with the floating real image, namely, the user can carry out actual operation according to the guidance picture presented by the aerial target area.

For example, when the user fingerprint information needs to be collected, the user places a finger in the air target area according to the guiding picture, when the finger of the user is placed in the air target area and conforms to the guiding posture in the guiding picture, the image collecting module 210 captures an image of the user fingerprint information, and the image processing module 220 processes the captured image information and stores the processed image information in the image storage module 230. At this time, the collection of the user fingerprint information is completed.

When the fingerprint information of the user needs to be identified, the user places a finger in the air target area according to the guide picture, when the finger of the user is placed in the air target area and accords with the guide gesture in the guide picture, the image acquisition module 210 captures an image of the fingerprint information of the user, the image processing module 220 processes the captured image information, compares the processed fingerprint information with the fingerprint information stored in the image storage module 230 for identification, and determines the identity of the user according to the identification result.

The utility model discloses an aerial target area of touch triggers to gather discernment subsystem 200 and carries out image acquisition discernment, need not to set up extra limiting device and guides user operation, and the in-process user who gathers the discernment need not to contact the equipment body to make the user safer, convenient, high-efficient when carrying out fingerprint collection discernment.

Specifically, the imaging module 110 forms a floating real image, i.e., a guidance picture, at a certain position in the air, and covers a three-dimensional space where the floating real image is located, i.e., an air target area, so that the imaging module 110 displays related prompt information in the air target area to guide a current user to act, and finishes acquisition and identification of current user biometric information. Consequently, the user is through directly interacting with the real image of superficial sky to need not to set up extra restriction mechanism and guide the user to operate, reduced the risk of user and this body of equipment contact, improved the utility model discloses biological characteristic gathers recognition system 1000 and carries out the result of use of non-contact collection and discernment.

The detection module 120 is configured to detect an operation of a user on a floating real image, send an acquisition trigger signal to the image acquisition module 210 when it is detected that a target object exists in an aerial target area and a posture of the target object conforms to a guidance posture in a guidance picture, where the image acquisition module 210 receives the acquisition trigger signal to acquire image information of the target object in the aerial target area, and then the image processing module 220 performs biometric processing according to the image information to acquire or identify a biometric feature. The user touches the aerial target area to trigger the image acquisition module 210 to perform acquisition and identification, so that the operation mode is more convenient and visual.

In an embodiment, the detection module 120 may periodically detect user interaction with the floating real image, for example, in a fingerprint acquisition identification process, the interaction includes interaction position, palm orientation, and the like. When it is detected that the user hand touches the floating real image area and the touch position and the hand direction correspond to the guide picture, the detection module 120 sends an acquisition trigger signal, the image acquisition module 210 receives the acquisition trigger signal and captures an image of the user hand in the floating real image area, and the image processing module 220 processes the hand image to obtain fingerprint information and compares the fingerprint information with stored fingerprint information to determine the user identity.

In an embodiment, the detection module 120 may be an optical sensor, and its sensing form may include, but is not limited to, far and near infrared, ultrasonic, laser interference, grating, encoder, fiber optic type or CCD (Charge-coupled Device), etc. The sensing area of the detection module 120 and the guiding frame are located on the same plane and include a three-dimensional space where the guiding frame is located. In practical application, the optimal sensing form can be selected according to the installation space, the viewing angle and the use environment, so that a user can conveniently operate in an aerial target area in the optimal posture, and the user experience is improved.

The acquisition area of the image acquisition module 210 covers the position where the guide picture is located, i.e., the aerial target area, and the area constitutes the biometric acquisition area. Specifically, when the biological feature collection and identification are performed, the display position of the guide picture is relatively fixed, when the detection module 120 detects that the user directly interacts with the guide picture, an acquisition trigger signal is sent to trigger the image collection module 210 to perform image collection on the biological feature of the user at the position of the guide picture, the image processing module 220 processes the biological feature image, and the processed biological feature information is stored in the image storage module 230 to realize the biological feature collection; or comparing the processed biological characteristic information with the stored biological characteristic information to identify the identity of the user, thereby achieving the purpose of non-contact biological characteristic acquisition and identification of the user.

When the image acquisition module 210 acquires an image, the placement posture of the target object can be accurately fitted according to the floating real image guided by the medium, and meanwhile, the contour of the target object can be quickly searched and the position of the target object can be fitted, so that the central position of the target object in the image can be accurately extracted, and the main feature extraction can be performed in a proper range around the central position. Therefore, the influence on the image due to scale, translation and rotation is reduced during image acquisition, the unreliability brought by an image algorithm is reduced, and the algorithm errors of potential images of biological feature extraction and biological feature matching are reduced.

In addition, because the position that the real image of floating sky was located is definite, consequently, the embodiment of the utility model provides a under the circumstances of the real image position of floating sky of collection region cover of guaranteeing image acquisition module 210, can be according to actual conditions as far as possible with the aperture setting of image acquisition module 210 bigger to increase the light inlet amount of target object scattered light in the acquisition process, thereby obtain clearer target object image.

In some embodiments, the image acquisition module 210 may be used to acquire a plurality of biometric information of the user in the air target area, and the acquisition method is not limited to structured light, stereo vision, and Time of flight (TOF). For example, for the acquisition and identification of fingerprint information, the fingerprint information may be acquired by two high-speed cameras, which are arranged at a predetermined distance from a base line (e.g., a camera distance), and fingerprint images of different parts of at least one finger in a palm of a user are obtained by using a stereo vision method, and fingerprint depth information is obtained according to at least two disparity maps corresponding to the different parts of the finger, so as to construct a 3D fingerprint image of the surface of the finger part by splicing, and then the 3D fingerprint image is expanded into an equivalent 2D fingerprint image, so as to obtain fingerprint information compatible with a large amount of fingerprint databases currently acquired and filed by other methods, for example, the fingerprint information is obtained by using a contact method. It will be appreciated that it is also feasible to identify and verify the identity of a user from only the acquired 3D fingerprint image, if compatibility with other flat fingerprint information is not taken into account.

The image processing module 220 is used for performing biometric processing on the image information acquired by the image acquisition module 210 to complete acquisition and identification of biometric features. The processing of the image information comprises extraction of a region of interest, graying of an image, enhancement of the image, binarization and thinning of the image, extraction of feature points and matching of the feature points. Through a series of image preprocessing operations and feature extraction operations, feature data of key points are recorded and stored in the image storage module 230, so that the purpose of collecting the user identity is achieved. Or, comparing the feature data of the key points with the feature data stored in the image storage module 230, judging the similarity through an algorithm, and finally judging the matching degree of the biological features to determine whether the biological features of the user pass or not, thereby realizing the purpose of verifying the identity of the user.

The image storage module 230 may be a storage device integrated in the system in advance, a cloud server with a storage function remotely connected in a wifi, bluetooth or other manners, or a detachable portable device such as an SD card or a hard disk, which is not limited thereto. The biometric information of the user is stored by the image storage module 230 for subsequent extraction for identifying the user identity.

According to the biological feature collecting and identifying system 1000 of the embodiment of the present invention, the guiding picture of biological feature collecting and identifying is imaged in the aerial target area through the imaging module 110, that is, the aerial target area is used as the reference surface for the user to operate, and the user can operate according to the guiding picture presented in the aerial target area; when detecting that the posture of the target object conforms to the guidance posture in the guidance picture, the detection module 120 sends an acquisition trigger signal to the image acquisition module 210; the image acquisition module 210 captures an image of a target object in the hollow target area, and the image processing module 220 performs biometric processing according to the image information to acquire biometric characteristics of the user or identify the identity of the user, so as to achieve the purpose of acquiring and identifying the non-contact biometric characteristics of the user. The embodiment of the utility model provides an in-air target area of user touch can trigger image acquisition module 210 and carry out image information acquisition discernment, need not to set up extra restriction user operating means, and need not to contact the equipment body at the in-process of gathering the discernment to make the user safer, high-efficient when carrying out non-contact biological feature collection discernment operation.

In some embodiments, as shown in fig. 2, an imaging module 110 of an embodiment of the present invention includes a housing 10, a display 20, an optical assembly 30, and a master control unit 40.

As shown in fig. 2, the housing 10 is formed with a display window 1 and an accommodating chamber 2 therein; the display 20 is arranged in the accommodating cavity 2 and is used for displaying a guide picture of biological characteristic acquisition and identification; the optical assembly 30 is disposed in the accommodating cavity 2, and is configured to converge and image light of a guide picture displayed by the display 20 in the aerial target region 11, the display 20 is disposed on a light source side of the optical assembly 30, the display window 1 is disposed on an image side of the optical assembly 30, and the display window 1 is configured to transmit light refracted by the optical assembly 30, specifically, the optical assembly 30 may be disposed at the display window 1, the optical assembly 30 refracts light emitted by the display 20, and the refracted light is converged and imaged in the aerial target region 11 through the display window 1; a main control unit 40 is disposed in the receiving chamber 2, and the main control unit 40 controls the display 20.

In an embodiment, the main control unit 40 may be directly integrated with the display 20, or the main control unit 40 and the display 20 may be separately provided. The control instruction content of the main control unit 40 can also be transmitted to other external devices for processing or controlling other external devices, such as controlling a fingerprint lock, a card punch, and the like. Furthermore, it can be understood that the image capturing unit 21, the control unit 22, and the image processing module 220 of the embodiment of the present invention can also be controlled by an external device without passing through the main control unit 40.

Specifically, as shown in fig. 3, the display 20 is disposed on one side of the optical assembly 30, i.e., the light source side, the display 20 is controlled to display a guiding picture, and light rays of the guiding picture displayed by the display 20 are imaged and displayed on the aerial target area 11 through the optical assembly 30. The three-dimensional space of the guide picture is the aerial target area 11. The detection module 220 is configured to detect an interactive operation between a user and a guidance screen, and feed back a detected operation signal to the main control unit 40, where the main control unit 40 triggers the image acquisition module 210 to perform image acquisition, and performs biometric processing on acquired image information through the image processing module 220, so as to acquire biometric information or identify a user identity.

In an embodiment, the imaging mode of the Display 20 may include RGB (red, green, blue) Light Emitting Diodes (LEDs), LCD (Liquid Crystal Display), LCOS (Liquid Crystal on Silicon) devices, OLED (Organic Light Emitting Diode) array, projection, laser Diode, or any other suitable Display or stereoscopic Display, without limitation. The display 20 can provide a clear, bright and high-contrast dynamic image light source, and the main control unit 40 controls the display 20 to display a guiding picture, and the guiding picture is refracted by the optical assembly 30, so that a clear floating real image can be presented at the position of the target area in the air, thereby facilitating the operation of a user.

In an embodiment, the luminance of the display 20 may be set to not less than 500cd/m²Thereby reducing the effect of brightness loss in the optical path propagation. Of course, in practical applications, the display brightness of the display 20 may be adjusted according to the brightness of the ambient light.

In the embodiment, the viewing angle control processing may be performed on the surface of the display image of the display 20 to reduce the afterimage of the aerial target area 11, improve the image quality, and prevent others from peeping at the same time, so as to be widely applied to other input devices requiring privacy information protection.

In an embodiment, the main control unit 40 and the detection module 120 may be connected in a wired or wireless manner to transmit digital or analog signals, so that the volume of the whole device may be flexibly controlled, and the electrical stability of the biometric acquisition and identification system 1000 may be enhanced.

As shown in fig. 2, the image capturing module 210 according to the embodiment of the present invention includes at least one image capturing unit 21 and a control unit 22. The image acquisition unit 21 is arranged on the imaging side of the optical assembly 30, the control unit 22 is connected with the image acquisition unit 21 and the main control unit 40, and the image acquisition unit 21 is used for responding to an acquisition trigger signal and acquiring image information of a target object in an aerial target area.

In an embodiment, the image capturing unit 21 may be a single or multiple high-speed CMOS cameras, and as shown in fig. 5, the image capturing unit 21 includes three cameras, and the capturing area of each camera covers the area where the guide picture is located. The focal plane position of each camera is set to the target area 11 in the air, so that image information of different parts of the target object can be clearly shot. For example, when the palm of the user's hand is in the airborne target area 11, the cameras may clearly capture fingerprint images of different portions of at least one finger. In addition, under the condition that the above conditions are met, preferably, the image capturing unit 21 may adopt a camera with a fixed focus large aperture, so that a process of focusing on the position of the target object when the image is captured may be omitted, the speed, the success rate and the reliability of image capturing and recognition are improved, and the large aperture may also ensure sufficient light transmission amount, and improve the definition and the brightness of the captured image.

It should be noted that, when the acquisition area of a single focal segment of the image acquisition unit 21 cannot cover the area of the whole floating real image, or even cover the area of the whole floating real image, but the image acquisition unit acquires the image of the target object, all the required image information cannot be acquired at one time, the image acquisition unit 21 needs to retain the necessary focusing function. Meanwhile, since the aerial target region 11 is used as a reference plane, the focusing range is considered to be small, and therefore the image acquisition unit 21 can acquire a visible light image of the target object and also can acquire an infrared image of the target object. In addition, the image capturing unit 21 may also add a filter for light in the corresponding wavelength band to eliminate the influence of ambient light.

There are various ways in which the image capturing unit 21 extracts the main feature within an appropriate range around the center of the target object, and this is not limited. Two feature extraction methods are listed below, taking the example that the image acquisition unit 21 includes three high-speed CMOS cameras, as follows.

As shown in fig. 6, taking collecting and recognizing fingerprint information as an example, three high-speed CMOS cameras in different orientations are arranged to obtain images of target objects in different orientations, which correspond to the collecting channel 1, the collecting channel 2, and the collecting channel 3, and the image processing module 220 is used to perform feature extraction and matching on the image of each collecting channel, and the three groups of matching results are fused by a mean value fusion algorithm to obtain a final comparison result. Or, as shown in fig. 7, three high-speed CMOS cameras in different orientations are arranged to obtain images of the target object in different orientations, the image processing module 220 obtains depth information of the target object according to at least two disparity maps corresponding to different parts of the target object, and performs stitching to construct a 3D image of the surface of the target object, and then expands the 3D image into an equivalent 2D target object image, so as to perform feature extraction and feature matching on the basis of the 2D image, and obtain a final comparison result.

The biometric information collecting and identifying system 1000 according to the embodiment of the present invention is described below with reference to fig. 4 by taking the fingerprint information of the user as an example, and the specific contents are as follows.

In an initial state, the main control unit 40 causes the display 20 to display a guidance picture, and causes the guidance picture to be displayed in an aerial target area 11 through the optical component 30, as shown in fig. 3, the optical component 30, such as a flat lens, images a palm-shaped pattern in the display 20 into the air on the other side of the flat lens, i.e., at the aerial target area 11, to guide a user to perform fingerprint collection and identification in a correct area, and the detection module 120, such as an optical sensor, periodically detects interaction operations of the user, including an interaction position, a palm direction, and the like. The user places the palm according to the displayed guide picture, when the detection module 120 detects that the palm of the user touches the air target area and the position and the direction are correct, the detection module 120 sends a collection trigger signal to the main control unit 40, the main control unit 40 sends a control signal to the control unit 22, the control unit 22 controls the image collection unit 21 to start collecting the image of the palm fingerprint of the user, transmits the image information to the image processing module 220 for processing and analysis, and compares the image information with the internal fingerprint library stored in the image storage module 230 to verify whether the user identity passes or not. In addition, if the image information acquisition unit 21 fails to acquire the image information, the data processing module 111 analyzes the failure reason, such as the palm of the user is not aligned, the palm moves too fast or the palm is shifted, and generates the guidance prompt information and sends the guidance prompt information to the main control unit 40, and the main control unit 40 controls the display 20 to display the guidance prompt information to guide the palm of the user to act, so as to correctly complete the acquisition of the fingerprint information, and realize the identification of the user identity.

In addition, the detection module 120, such as an optical sensor, may also detect other operations of the User, including clicking, sliding, and the like, and transmit the interactive operation information to the main control unit 40, the main control unit 40 determines specific operation contents of the User according to an internal instruction set, such as selecting a fingerprint recording mode, viewing fingerprint information, and the like, and simultaneously transmits UI (User Interface) operation interfaces, such as related control buttons and settings, to the display 20, so as to display an image in the target area in the air and guide the User to operate.

The utility model discloses image acquisition unit 21 sets up to be facing aerial target area 11 direction, for example when image acquisition unit 21 is high-speed CMOS camera, makes camera optical axis perpendicular to guide picture place plane, but when in actual use, because optical assembly 30's existence, there is an inclination in image acquisition unit 21's optical axis and the normal line of guide picture for the unable perpendicular to of image acquisition unit 21's optical axis guides picture place plane, leads to the problem that the image of gathering appears the distortion. Therefore, the embodiment of the utility model provides an image acquisition unit 21 sets up in optical assembly 30's formation of image side, gathers aerial image region's target object's image information more easily, reduces the image distortion, provides support for follow-up discernment biological characteristic information.

In some embodiments, as shown in fig. 8, the image acquisition unit 21 is disposed on the imaging side of the optical assembly 30, and the optical axis of the image acquisition unit 21 is at a predetermined angle θ (0 ° < θ <90 °) to the normal of the imaging plane of the aerial target region 11. That is, the image pickup unit 21 is disposed above the optical assembly 30, i.e., the image pickup unit 21 is located on the same side of the optical assembly 30 as the guide picture. Under this configuration, since image acquisition unit 21 avoids optical assembly 30 after, there is definite angle theta in the optical axis of image acquisition unit 21 and the guide picture normal, so, the embodiment of the utility model provides a when handling the image, can obtain clear image information through correcting the deformation distortion factor that the theta angle brought.

In other embodiments, as shown in fig. 9, the image pickup unit 21 is disposed on the image side of the optical assembly 30 while the beam splitter 31 is disposed on the upper surface, i.e., the image side, of the optical assembly 30. Specifically, the beam splitter 31 may transmit a part of the transmitted light and reflect another part thereof so as to reflect the image information of the target object in the air target region 11 through the beam splitter 31 to transmit the image information to the image pickup unit 21, thereby obtaining clear image information.

Two preferred embodiments of the beam splitter 31 disposed on the surface on the imaging side of the optical assembly are illustrated in conjunction with fig. 9.

In some embodiments, as shown in fig. 9, the optical axis of the image capturing unit 21 is perpendicular to the normal of the imaging plane of the aerial target area 11, and the image capturing unit 21 employs a visible light image capturing unit. The beam splitter 31 is a beam splitter that is semi-transparent and semi-reflective to visible light, i.e., a beam splitter having 50% transmittance and 50% reflectance to visible light. The image pickup unit 21 is disposed such that the optical axis is perpendicular to the plane of the guide screen after being reflected by the beam splitter 31. Thus, when the image capturing unit 21 needs to capture a visible light target object image, the image capturing unit 21 can capture an undistorted target object image through reflection by the beam splitter 31.

In other embodiments, as shown in fig. 9, the optical axis of the image capturing unit 21 is perpendicular to the normal of the imaging plane of the aerial target area 11, and the image capturing unit 21 employs an infrared image capturing unit. The beam splitter 31 is a beam splitter that transmits visible light and reflects infrared light. The beam splitter 31 which transmits visible light and reflects infrared light has good light transmission to a visible light waveband, so that the problem of brightness reduction of a floating real image can be solved by adopting the beam splitter 31, and the beam splitter 31 completely reflects infrared light, so that light flux loss is avoided basically when an infrared image is captured, and the image acquisition unit 21 can acquire a clear target object image.

In some embodiments, as shown in fig. 9, a filter member 24 capable of filtering visible light is disposed on the light incident side of the infrared image capturing unit to further avoid interference of visible light.

In some embodiments, the beam splitter 31 of embodiments of the present invention may be sized to cover the entire optical assembly 30, or may be sized according to actual image acquisition requirements. For example, as shown in fig. 9, the beam splitter 31 completely covers the surface of the optical assembly 30 on the image side.

In some embodiments, as shown in fig. 10, the image capturing module 210 of the present invention further includes at least one total reflection unit 25, such as a total reflection mirror, where the at least one total reflection unit 25 is used for performing total reflection on the image information of the target object in the aerial target area 11 reflected by the beam splitter 31 to transmit the image information to the image capturing unit 21. For example, as shown in fig. 10, a total reflection mirror is used to make light scattered by a target object in the aerial target region 11 enter the image capturing unit 21 after multiple total reflections, so that the position of the image capturing unit 21 is more freely arranged by using the total reflection unit 25, for example, the height of the device can be lower to reduce the occupied space, and the angle state of the final optical axis and the guiding picture will not be changed by the total reflection unit 25.

As shown in fig. 4, the imaging module 110 of the embodiment of the present invention further includes a data processing module 111, the data processing module 111 is connected to the main control unit 40, and the data processing module 111 is configured to send out a guidance prompt message when the detection module 120 detects that the posture of the target object does not conform to the guidance posture in the guidance picture; and the main control unit 40 controls the display 20 to display the guidance prompt information, further converges and images the light of the guidance prompt information displayed by the display 20 in the aerial target area 11 through the optical component 30, and the user adjusts the interaction posture according to the guidance prompt information, thereby better realizing interaction and finishing the collection and identification of the biological characteristic information of the user.

The embodiment of the utility model provides an in set up the light-absorbing layer on the inner wall that holds chamber 2, that is, all do black extinction processing except that the display 20 shows the face in casing 10, absorb light coating or put up the light-absorbing film like the spraying to be used for eliminating the diffuse reflection of casing 10 internals to light, improve the display effect who floats empty real image.

It is understood that fig. 4 is only an example of the biometric collecting and identifying system 1000 according to the embodiment of the present invention, wherein the image processing module 220 may be directly integrated with the data processing module 111 in the imaging module 110, or the image processing module 220 and the data processing module 111 in the imaging module 110 may be separately disposed, which is not limited thereto, but both of them may be used to generate the guidance prompt information when the image information does not identify the valid biometric. Moreover, the embodiment of the present invention provides that the main control unit 40 and the control unit 22 can be integrally configured, and can also be separately configured, which is not limited thereto.

The embodiment of the second aspect of the present invention provides a terminal device, as shown in fig. 11, the terminal device 2000 of the embodiment of the present invention includes a device body 300 and a biometric feature collection and recognition system 1000 provided by the above embodiment. The biometric acquisition and recognition system 1000 is disposed on the device body 300.

According to the utility model discloses terminal equipment 2000, through adopting the biological characteristic collection identification system 1000 that above-mentioned embodiment provided, come to gather and discern user's biological characteristic information, the risk of contact means when can avoiding user operation, and need not to set up extra restriction user operating means to make non-contact fingerprint collection operation also safer, high-efficient.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A biometric acquisition and identification system, comprising:

an imaging subsystem, comprising:

the imaging module comprises a display for displaying a guide picture of biological characteristic acquisition and identification, an optical component for converging and imaging the guide picture of biological characteristic acquisition and identification in an aerial target area and a main control unit, and the main control unit is connected with the display;

the detection module is connected with the main control unit and used for sending an acquisition trigger signal when detecting that a target object exists in the aerial target area and the interaction posture of the target object and the guide picture conforms to the guide posture in the guide picture;

an acquisition identification subsystem comprising:

the image acquisition module comprises at least one image acquisition unit and a control unit, the image acquisition unit is arranged on the imaging side of the optical assembly, the control unit is connected with the image acquisition unit and the main control unit, and the image acquisition unit is used for responding to the acquisition trigger signal and acquiring the image information of the target object in the aerial target area;

the image storage module is used for storing the biological characteristic information;

and the image processing module is connected with the image acquisition module and the image storage module and is used for acquiring biological characteristic information or identifying the identity of the user according to the image information.

2. The biometric acquisition and identification system according to claim 1, wherein the optical axis of the image acquisition unit is at a predetermined angle with respect to the normal of the imaging plane of the airborne target area.

3. The biometric acquisition identification system of claim 1, wherein the imaging module further comprises:

a beam splitter disposed on an imaging side of the optical assembly for reflecting image information of the airborne target area target object.

4. The biometric acquisition identification system according to claim 3,

the optical axis of the image acquisition unit is vertical to the normal of the imaging plane of the aerial target area;

the beam splitter is a beam splitter which is semitransparent and semi-reflective to visible light.

5. The biometric acquisition identification system according to claim 3,

the optical axis of the image acquisition unit is vertical to the normal of the imaging plane of the aerial target area;

the image acquisition unit is an infrared image acquisition unit;

the beam splitter transmits visible light and reflects infrared light.

6. The biometric acquisition and identification system according to claim 5, wherein the light incident side of the infrared image acquisition unit is provided with a filter member for filtering visible light.

7. The biometric acquisition identification system of any one of claims 3-6, wherein the beam splitter completely covers a surface on an imaging side of the optical assembly.

8. The biometric acquisition identification system of claim 3, wherein the image acquisition module further comprises:

and the at least one total reflection unit is used for carrying out total reflection on the image information of the target object in the air target area reflected by the beam splitter.

9. The biometric acquisition identification system of claim 1, wherein the imaging module further comprises:

a housing formed with a display window and an accommodation chamber therein;

the display, the optical assembly and the main control unit are all arranged in the accommodating cavity, the display is arranged on the light source side of the optical assembly, and the display window is arranged on the imaging side of the optical assembly.

10. The biometric acquisition identification system of claim 1, wherein the imaging module further comprises:

the data processing module is connected with the main control unit and used for sending out guidance prompt information when the detection module detects that the posture of the target object is not in accordance with the guidance posture in the guidance picture;

the main control unit is also used for controlling the display to display the guiding prompt information;

the optical assembly converges and images the light rays of the guiding prompt information displayed by the display on the aerial target area.

11. The biometric acquisition and identification system of claim 9, wherein a light absorbing layer is disposed on an inner wall of the receiving chamber.

12. A terminal device, comprising:

an apparatus body;

the biometric acquisition identification system of any one of claims 1-11, said biometric acquisition identification system being disposed on said device body.

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