CN116503919A - Finger palm vein collection equipment and method based on TOF ranging sensor - Google Patents
Finger palm vein collection equipment and method based on TOF ranging sensor Download PDFInfo
- Publication number
- CN116503919A CN116503919A CN202210073074.2A CN202210073074A CN116503919A CN 116503919 A CN116503919 A CN 116503919A CN 202210073074 A CN202210073074 A CN 202210073074A CN 116503919 A CN116503919 A CN 116503919A
- Authority
- CN
- China
- Prior art keywords
- palm
- image
- module
- target
- target palm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000003462 vein Anatomy 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 239000013589 supplement Substances 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 239000000284 extract Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The application relates to the technical field of image acquisition and discloses a finger palm vein acquisition device and a finger palm vein acquisition method based on a TOF ranging sensor, wherein the device comprises a TOF sensor module, a target palm detection module and a detection module, wherein the TOF sensor module is used for transmitting pulse light signals to the target palm and receiving the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm; the image sensor module is used for triggering the sensor to collect finger palm vein images corresponding to the target palm when the target palm is detected within a preset distance range; the control center module is used for controlling the TOF sensor module to acquire the detection distance of the target palm, generating exposure time based on the detection distance, controlling the image sensor module to collect the finger palm vein image in the exposure time, extracting the image characteristics of the finger palm vein image, storing and matching the image characteristics, and outputting a matching result. The time for collecting the finger palm vein image is controlled, so that the finger palm vein collecting accuracy is improved.
Description
Technical Field
The application relates to the technical field of image acquisition, in particular to a finger palm vein acquisition device and method based on a TOF ranging sensor.
Background
The palm vein recognition is a kind of vein recognition, belongs to biological recognition, acquires images of palm and finger veins through a near infrared camera, generates characteristic values from finger palm vein distribution diagrams through a specific algorithm and stores the characteristic values in a computer system, when vein comparison is carried out, the vein diagrams are adopted in real time, the characteristic values are extracted through the specific algorithm and compared with the characteristic values of the finger palm veins stored in a host computer, and the vein characteristics are matched through a complex matching algorithm, so that identity authentication is carried out on individuals, and identity is confirmed.
The existing finger palm vein collection equipment uses a roller shutter camera to make the finger palm vein equipment, which requires longer palm stay time and can generate the phenomenon of overexposure or underexposure of palm vein images, thereby leading to lower accuracy of finger palm vein collection.
Disclosure of Invention
An aim of the embodiment of the application is to provide a finger palm vein collection device and a finger palm vein collection method based on a TOF ranging sensor, so as to improve the accuracy of finger palm vein collection.
In order to solve the above technical problem, an embodiment of the present application provides a finger palm vein collection device based on a TOF ranging sensor, including:
the TOF sensor module is used for transmitting pulse light signals to a target palm and receiving the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm;
the image sensor module is used for collecting finger palm vein images corresponding to the target palm when the target palm is detected within a preset distance range; and
the control center module is connected with the TOF sensor module and the image sensor module,
the method comprises the steps of controlling the TOF sensor module to obtain the detection distance of the target palm, generating exposure time based on the detection distance, controlling the image sensor module to collect the finger palm vein image in the exposure time, extracting the image characteristics of the finger palm vein image, storing and matching the image characteristics, and outputting a matching result.
In order to solve the above technical problems, an embodiment of the present application provides a finger palm vein collection method based on a TOF ranging sensor, including:
the TOF sensor module transmits pulse light signals to a target palm and receives the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm;
when the image sensor module detects the target palm within a preset distance range, collecting a finger palm vein image corresponding to the target palm; and
the control center module controls the TOF sensor module to acquire the detection distance of the target palm, generates exposure time based on the detection distance, controls the image sensor module to collect the finger palm vein image in the exposure time, extracts the image characteristics of the finger palm vein image, stores and matches the image characteristics, and outputs a matching result.
According to the embodiment of the invention, the TOF sensor module transmits the pulse light signals to the target palm and receives the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm; when the image sensor module detects a target palm within a preset distance range, collecting a finger palm vein image corresponding to the target palm; and the control center module controls the TOF sensor module to acquire the detection distance of the target palm, generates exposure time based on the detection distance, controls the image sensor module to collect the finger palm vein image in the exposure time, extracts the image characteristics of the finger palm vein image, stores and matches the image characteristics, and outputs a matching result. The method has the advantages that the distance of the palm is monitored in real time, the exposure time is generated, the finger palm vein image is collected in the exposure time, the too long or too short collection time is avoided, meanwhile, the finger palm vein image is collected in the preset distance, and the accuracy of finger palm vein collection is improved.
Drawings
For a clearer description of the solution in the present application, a brief description will be given below of the drawings that are needed in the description of the embodiments of the present application, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of a finger palm vein collection device based on a TOF ranging sensor provided in an embodiment of the present application;
FIG. 2 is a flowchart of a neutron process in a finger palm vein collection method based on a TOF ranging sensor according to an embodiment of the present application;
fig. 3 is a flowchart of still another implementation of a sub-flow of a finger palm vein collection method based on a TOF ranging sensor according to an embodiment of the present application.
Detailed Description
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; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In order to better understand the technical solutions of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings.
It should be noted that when an element is referred to as being "connected to" another element, it can be connected to the other element by wire or wirelessly, and the connection is used for data transmission.
Fig. 1 is a schematic diagram of a finger palm vein collection device based on a TOF ranging sensor according to an embodiment of the present invention. As shown in fig. 1, the finger palm vein collection device based on the TOF ranging sensor includes a TOF sensor module 11, an image sensor module 12, a control center module 13, an infrared light supplement module 14, and a status indication module 15. And also includes a driving circuit module (not shown) and a power supply module (not shown), etc.
The TOF sensor module 11 is used for transmitting the pulse light signals to the target palm and receiving the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm;
the image sensor module 12 is configured to trigger the sensor to collect a finger-palm vein image corresponding to a target palm when the target palm is detected within a preset distance range; and
the control center module 13 is connected with the TOF sensor module 11 and the image sensor module 12, and is used for controlling the TOF sensor module 11 to acquire the detection distance of the target palm, generating exposure time based on the detection distance, controlling the image sensor module 12 to collect the finger palm vein image in the exposure time, extracting the image characteristics of the finger palm vein image, storing and matching the image characteristics, and outputting a matching result;
the infrared light supplementing lamp module 14 is connected with the control center module 13 and is used for emitting infrared rays to the target palm when the target palm is detected within a preset distance range so as to supplement light to the target palm;
the status indication module 15 is connected to the control center module 13, and is configured to emit status light according to a result of matching the detection distance with the preset distance by the control center module, so that the user moves the target palm to a preset range.
Specifically, when the finger palm vein collection device based on the TOF ranging sensor is in a standby state, detecting whether an object exists in a set distance range in real time through the TOF sensor 11, wherein the detection method is to judge whether a reflected pulse light signal is received through the TOF sensor 11 by transmitting the pulse light signal, judge whether the object is in the set distance range by transmitting the pulse light signal and receiving a time phase difference of the reflected pulse light signal, and take the object as a target palm needing to collect finger palm vein images if the object exists; if the corresponding object is judged not to exist, the equipment is calculated to enter a standby state.
If it is determined that the corresponding object exists, the state indication module 15 determines whether the detection distance of the target palm is within the preset distance, if not, the state indication module 15 emits corresponding state light to remind the user that the palm distance is not proper, and prompts the user to put the palm at a proper position.
The control center module 13 determines the exposure time according to the detection distance from the target palm transmitted back by the TOF sensor 11 to the image sensor, so as to instruct the sensor to collect the finger palm vein image of the target palm according to the exposure time; the infrared light supplementing lamp module 14 emits infrared rays to the target palm while collecting the finger palm vein image, so that the brightness of the target palm is adjusted, the finger palm vein image with proper brightness is collected, and the collection accuracy of the finger palm vein image is improved.
Extracting features from the collected metacarpal vein images at the control center module 13 to obtain image features, matching the image features with metacarpal vein images in the storage unit, outputting a matching failure result if the matching fails, entering the equipment into a standby state, prompting a user, and storing the extracted image features in the storage unit by the control center module 13 if the matching is successful, outputting a matching success result and entering the equipment into the standby state of the next cycle.
Further, when the sensor collects the finger palm vein image of the target palm according to the exposure time, whether the finger palm vein image is successfully collected or not is judged, if the collection fails, the device is in a standby state, a user is prompted to collect again, and if the collection is successful, image feature extraction is performed.
The infrared light-compensating lamp module 14 may be an infrared ray pen, an infrared ray gun, or the like, and may emit infrared rays for compensating light to the target palm. The state indication module is an indication lamp and is used for reminding a user to move the palm to the detection range. The TOF ranging sensor is TOF sensor module 11.
The TOF sensor module 11 includes a transmitting unit 111, a receiving unit 112, and a control unit 113.
A transmitting unit 111 for transmitting a pulsed light signal by transmitting to a target palm;
a receiving unit 112, configured to receive the pulsed light signal reflected by the target palm;
and a control unit 113 connected to the transmitting unit 111 and the receiving unit 112, for calculating a phase difference between the pulsed light signal transmitted by the transmitting unit and the pulsed light signal received by the receiving unit, and obtaining a detection distance of the target palm based on the phase difference.
The control center module 13 is further configured to match the image feature with the palm image stored in the storage unit, obtain a matching result, output a matching success result if the matching result is matching, and output a matching failure result if the matching result is not matching.
In some embodiments, the emitting unit 111 may be a laser, or may be a laser emitting unit formed by combining a laser, a lens, a light cone, or the like; for transmitting a pulsed light signal to a target palm. Can be selected according to actual needs.
In some embodiments, the receiving unit 112 comprises a PIN diode, a single photon avalanche diode (Single Photon Avalanche Diode, SPAD), an avalanche photodiode (Avalanche Photon Diode, APD) photodetector, or the like, for converting the received optical signal into an electrical signal and processing by a corresponding receiving processor to obtain information of the target object. Furthermore, in some embodiments, the receiving unit 112 also includes lenses and/or filters, etc., as desired; the lens is used for converging the light beams, and the optical filter is used for filtering out background light signals outside the bandwidth.
In some embodiments, the control unit 113 controls the periodic modulation signal required when the transmitting unit 111 transmits the laser light, and performs corresponding control when the receiving unit 112 processes the collected pulse light signal, and provides auxiliary monitoring signals such as temperature sensing, overcurrent, overvoltage protection, falling protection, and the like;
the control center module may be a central processing unit (Central Processing Unit, CPU), a general purpose processor, a Digital signal processor (Digital SignalProcessor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The control center module includes a memory unit and a processing unit, and the memory unit may be an internal memory of the processing unit. The memory unit may also be an external memory of the processing unit, such as a plug-in hard disk provided on the processor, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory unit may also include both an internal memory and an external memory of the metacarpal vein acquisition device based on the TOF ranging sensor. The storage unit is used for storing computer programs, such as programs for collecting finger palm veins based on TOF ranging sensors, and other programs and data required by the terminal equipment. The storage unit may also be used to temporarily store data that has been output or is to be output.
Referring to fig. 2, fig. 2 shows a specific embodiment of a finger palm vein collection method based on a TOF ranging sensor.
S21: the TOF sensor module transmits pulse light signals to the target palm and receives the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm.
Referring to fig. 3, fig. 3 shows a specific embodiment of step S21, which is described in detail as follows:
s211: the transmitting unit transmits a pulsed light signal to a target palm.
S212: the receiving unit receives the pulse light signal reflected by the target palm.
S213: the control unit calculates a phase difference between the pulsed light signal transmitted by the transmitting unit and the pulsed light signal received by the receiving unit, and obtains a detection distance of the target palm based on the phase difference.
Specifically, whether an object exists in a set distance range is detected in real time, whether a reflected pulse light signal is received or not is judged by transmitting the pulse light signal, whether the object exists in the set distance range is judged by transmitting the pulse light signal and receiving the time phase difference of the reflected pulse light signal, and if the object exists, the object is used as a target palm of a finger palm vein image to be acquired.
In this embodiment, by transmitting the pulse light signal and receiving the reflected pulse light signal, it is determined whether a target palm exists, and a phase difference between the transmitted pulse light signal and the pulse light signal received by the receiving unit is calculated, and a detection distance of the target palm is obtained based on the phase difference, so that it is beneficial to determine whether the palm performs finger palm vein image acquisition according to the detection distance of the target palm, and provide a basis for a subsequent exposure time, so that it is beneficial to improve accuracy of finger palm vein acquisition.
S22: when the image sensor module detects a target palm within a preset distance range, collecting a finger palm vein image corresponding to the target palm.
Further, the device further comprises an infrared light supplementing lamp module, wherein the infrared light supplementing lamp module is controlled by the control center module and connected with the control center module, and when the target palm is detected within the preset distance range, the infrared light supplementing lamp module emits infrared rays to the target palm so as to supplement light to the target palm.
Further, the device further comprises a status indication module, wherein the status indication module is controlled by the control center module and connected with the control center module, and transmits status light according to a matching result of the control center module on the detection distance and the preset distance, so that a user moves the target palm to a preset range.
Specifically, if the corresponding target palm is judged to exist, whether the detection distance of the target palm is within the preset distance is judged, if not, corresponding state light is sent out, the user is reminded that the palm distance is unsuitable, and the user is reminded to put the palm at a proper position.
Determining the exposure time according to the detection distance from the target palm to the image sensor, so as to instruct the sensor to collect the finger palm vein image of the target palm according to the exposure time; and when the finger palm vein image is acquired, infrared rays are emitted to the target palm, so that the brightness of the target palm is adjusted, the finger palm vein image with proper brightness is acquired, and the acquisition accuracy of the finger palm vein image is improved.
The preset distance is set according to the actual situation, and is not limited herein.
In the implementation, the detection distance is matched with the preset distance to obtain a matching result, if the matching result is that the detection distance is not within the preset distance, the state light is emitted, so that a user moves the target palm to a preset range, if the matching result is that the detection distance is within the preset distance, infrared rays are emitted to the target palm to supplement light to the target palm, the exposure time is generated based on the detection distance, the palm vein image corresponding to the target palm is collected through the sensor in the exposure time, the distance of the palm is monitored in real time, the exposure time is generated, the palm vein image is collected in the exposure time, the overlong or too short collection time is avoided, and meanwhile, the palm vein image is collected in the preset distance, so that the accuracy of the palm vein collection is improved.
S3: the control center module controls the TOF sensor module to acquire the detection distance of the target palm, generates exposure time based on the detection distance, controls the image sensor module to collect the finger palm vein image in the exposure time, extracts the image characteristics of the finger palm vein image, stores and matches the image characteristics, and outputs a matching result.
According to the embodiment of the invention, the detection distance of the target palm is obtained by emitting the pulse light signal to the target palm and receiving the pulse light signal reflected by the target palm; if the detection distance is within the preset distance, generating exposure time based on the detection distance, and collecting corresponding finger palm vein images corresponding to the target palm through a sensor in the exposure time; extracting image features of the finger palm vein image, storing and matching the image features, and outputting a matching result. The method has the advantages that the distance of the palm is monitored in real time, the exposure time is generated, the finger palm vein image is collected in the exposure time, the too long or too short collection time is avoided, meanwhile, the finger palm vein image is collected in the preset distance, and the accuracy of finger palm vein collection is improved.
The step S3 comprises the following steps: the control center module matches the image characteristics with the palm images stored in the storage unit to obtain a matching result, if the matching result is matched, a successful matching result is output, and if the matching result is not matched, a matching failure result is output.
Specifically, extracting features from the metacarpal vein image to obtain image features, matching the image features with the metacarpal vein image in the storage unit, if the matching fails, outputting a matching failure result, entering the equipment into a standby state, prompting a user, and if the matching is successful, storing and storing the extracted image features in the storage unit, and outputting a matching success result.
Further, when the sensor collects the finger palm vein image of the target palm according to the exposure time, whether the finger palm vein image is successfully collected or not is judged, if the collection fails, a user is prompted to collect again, and if the collection is successful, image feature extraction is performed.
In this embodiment, by extracting the image features of the metacarpal vein image and matching the image features with the palm image stored in the storage unit, a matching result is obtained, if the matching result is a match, a successful matching result is output, and the metacarpal vein image is stored, if the matching result is a non-match, a matching failure result is output, so that feature extraction and comparison of the metacarpal vein image are realized, whether the target palm is a collected metacarpal vein is facilitated to be determined, and subsequent feature processing of the target palm is facilitated.
It is apparent that the embodiments described above are only some embodiments of the present application, but not all embodiments, the preferred embodiments of the present application are given in the drawings, but not limiting the patent scope of the present application. This application may be embodied in many different forms, but rather, embodiments are provided in order to provide a more thorough understanding of the present disclosure. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing, or equivalents may be substituted for elements thereof. All equivalent structures made by the specification and the drawings of the application are directly or indirectly applied to other related technical fields, and are also within the protection scope of the application.
Claims (10)
1. A digital palm vein collection device based on a TOF ranging sensor, comprising:
the TOF sensor module is used for transmitting pulse light signals to a target palm and receiving the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm;
the image sensor module is used for collecting finger palm vein images corresponding to the target palm when the target palm is detected within a preset distance range; and
the control center module is connected with the TOF sensor module and the image sensor module,
the method comprises the steps of controlling the TOF sensor module to obtain the detection distance of the target palm, generating exposure time based on the detection distance, controlling the image sensor module to collect the finger palm vein image in the exposure time, extracting the image characteristics of the finger palm vein image, storing and matching the image characteristics, and outputting a matching result.
2. The TOF ranging sensor-based metacarpal vein acquisition device of claim 1, wherein the TOF sensor module comprises:
a transmitting unit for transmitting a pulsed light signal to the target palm;
the receiving unit is used for receiving the pulse light signals reflected by the target palm;
and the control unit is connected with the transmitting unit and the receiving unit and is used for calculating the phase difference between the pulse light signals transmitted by the transmitting unit and the pulse light signals received by the receiving unit and acquiring the detection distance of the target palm based on the phase difference.
3. The TOF ranging sensor-based metacarpal vein collection device of claim 1, further comprising an infrared light supplement lamp module;
the infrared light supplementing lamp module is connected with the control center module and is used for emitting infrared rays to the target palm when the target palm is detected within a preset distance range so as to supplement light to the target palm.
4. The TOF ranging sensor-based metacarpal vein acquisition device of claim 1, further comprising a status indication module;
the state indication module is connected with the control center module and is used for emitting state light according to a matching result of the control center module on the detection distance and the preset distance so that a user moves the target palm to a preset range.
5. The device of claim 1, wherein the control center module is further configured to match the image feature with a palm image stored in a storage unit to obtain a matching result, and if the matching result is a match, output a matching success result, and if the matching result is a non-match, output a matching failure result.
6. The finger palm vein collection method based on the TOF distance measurement sensor is characterized by being applied to finger palm vein collection equipment, wherein the finger palm vein collection equipment comprises a control center module, and a TOF sensor module and an image sensor module which are connected with the control center module and controlled by the control center module, and the method comprises the following steps:
the TOF sensor module transmits pulse light signals to a target palm and receives the pulse light signals reflected by the target palm so as to acquire the detection distance of the target palm;
when the image sensor module detects the target palm within a preset distance range, collecting a finger palm vein image corresponding to the target palm; and
the control center module controls the TOF sensor module to acquire the detection distance of the target palm, generates exposure time based on the detection distance, controls the image sensor module to collect the finger palm vein image in the exposure time, extracts the image characteristics of the finger palm vein image, stores and matches the image characteristics, and outputs a matching result.
7. The method for collecting finger palm veins based on a TOF ranging sensor according to claim 6, wherein the TOF sensor module comprises a transmitting unit, a receiving unit and a control unit, wherein the TOF sensor module transmits pulsed light signals to a target palm and receives the pulsed light signals reflected back by the target palm to obtain a detection distance of the target palm, and comprises:
the transmitting unit transmits a pulse light signal to the target palm;
the receiving unit receives the pulse light signals reflected by the target palm;
the control unit calculates the phase difference between the pulse light signals transmitted by the transmitting unit and the pulse light signals received by the receiving unit, and obtains the detection distance of the target palm based on the phase difference.
8. The method of claim 6, wherein the device further comprises an infrared light supplement lamp module controlled by and connected to the control center module, the method further comprising:
and when the target palm is detected within the preset distance range, the infrared light supplementing lamp module emits infrared rays to the target palm so as to supplement light to the target palm.
9. The method of claim 6, wherein the device further comprises a status indication module controlled by and connected to the control center module, the method further comprising:
and the state indication module emits state light according to a matching result of the detection distance and the preset distance by the control center module so that a user moves the target palm to a preset range.
10. The method for collecting metacarpal veins based on a TOF ranging sensor as set forth in claim 6, wherein said extracting image features of the metacarpal veins image, storing and matching the image features, and outputting a matching result includes:
and the control center module matches the image characteristics with the palm images stored in the storage unit to obtain a matching result, if the matching result is matched, a matching success result is output, and if the matching result is not matched, a matching failure result is output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210073074.2A CN116503919A (en) | 2022-01-21 | 2022-01-21 | Finger palm vein collection equipment and method based on TOF ranging sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210073074.2A CN116503919A (en) | 2022-01-21 | 2022-01-21 | Finger palm vein collection equipment and method based on TOF ranging sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116503919A true CN116503919A (en) | 2023-07-28 |
Family
ID=87315429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210073074.2A Pending CN116503919A (en) | 2022-01-21 | 2022-01-21 | Finger palm vein collection equipment and method based on TOF ranging sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116503919A (en) |
-
2022
- 2022-01-21 CN CN202210073074.2A patent/CN116503919A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3301476B1 (en) | Apparatus having a camera and a time of flight single photon avalanche diode based range detecting module for controlling the camera and corresponding method | |
| US11686826B2 (en) | Measuring time-of-flight using a plurality of detector subsystems and histogram storage | |
| US7379163B2 (en) | Method and system for automatic gain control of sensors in time-of-flight systems | |
| CN107358175B (en) | Iris collection method and electronic device | |
| US20140104436A1 (en) | Circuit to adjust backlighting for a display device | |
| JP5974913B2 (en) | Imaging method, imaging apparatus, and imaging program | |
| TW201327413A (en) | Systems and methods for face authentication or recognition using spectrally and/or temporally filtered flash illumination | |
| US20220245941A1 (en) | Method and device for detecting abnormal target, and storage medium | |
| KR20140055033A (en) | System and method for recognizing gesture and method of controlling a vehicle using the method | |
| CN110609977B (en) | Bottom noise adjusting and processing method and device based on proximity sensor and computer equipment | |
| US9377366B2 (en) | Navigation device including thermal sensor | |
| EP3701603B1 (en) | Vcsel based biometric identification device | |
| CN116503919A (en) | Finger palm vein collection equipment and method based on TOF ranging sensor | |
| CN111596507B (en) | Camera module and manufacturing method thereof | |
| CN111598073A (en) | Image sensing device and electronic apparatus | |
| US20210027590A1 (en) | Smart motion detection device | |
| KR20210006605A (en) | Electronic device including sensor and method of operation thereof | |
| CN212160703U (en) | Image sensing device and electronic apparatus | |
| CN111598071A (en) | Image sensing device and electronic apparatus | |
| JP2001264621A (en) | Range-finding device | |
| CN112526494A (en) | Method and device for acquiring ranging data, storage medium and electronic device | |
| CN218446736U (en) | Facial feature recognition system based on deep learning | |
| CN211505379U (en) | Drug detection device and mobile communication system with drug identification function | |
| CN212484402U (en) | Image sensing device and electronic apparatus | |
| CN111291671B (en) | Gesture control method and related equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |