CN211015545U - Palm vein collection module and system - Google Patents
Palm vein collection module and system Download PDFInfo
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- CN211015545U CN211015545U CN201922386884.XU CN201922386884U CN211015545U CN 211015545 U CN211015545 U CN 211015545U CN 201922386884 U CN201922386884 U CN 201922386884U CN 211015545 U CN211015545 U CN 211015545U
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Abstract
The utility model is suitable for biological identification technical field provides a palm vein collection module and system, and palm vein collection module includes position detecting element, image acquisition unit, image preprocessing unit, main control unit and light filling unit, and image acquisition unit connects image preprocessing unit, and main control unit connects position detecting element, image preprocessing unit and light filling unit respectively. The image acquisition unit gathers palm vein image, and position detecting element detects palm positional information simultaneously, and when the distance between palm position and the palm vein collection module was when effective collection within range, main control unit control light filling unit provided supplementary light source to improve the definition that the image acquisition unit gathered palm vein image. The image preprocessing unit preprocesses the palm vein image acquired by the image acquisition unit to obtain a clearer vein distribution map, so that the comparison pass rate is improved, and the experience of a user is further improved.
Description
Technical Field
The utility model belongs to the technical field of biological identification, especially, relate to a palm vein gathers module and system.
Background
At present, a clear and effective vein distribution diagram is difficult to collect by a palm vein image collector. Due to the unclear vein image, the comparison pass rate of the algorithm is greatly influenced, and the experience of the user is influenced. And because of different ages, different sexes and different users, the acquired venous images have different definitions and influence the comparison pass rate in the algorithm.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a palm vein gathers module and system to solve the problem that the palm vein image definition of gathering among the prior art is low.
The application is realized by the following technical scheme:
in a first aspect, an embodiment of the present application provides a palm vein collection module, including: the device comprises a position detection unit for detecting palm position information, an image acquisition unit for acquiring a palm vein image, an image preprocessing unit for processing the palm vein image to obtain a vein distribution diagram, a main control unit for generating a light supplement instruction according to the palm position information, and a light supplement unit for providing a supplement light source according to the light supplement instruction;
the image preprocessing unit is connected with the image acquisition unit, and the main control unit is connected with the position detection unit, the image preprocessing unit and the light supplement unit.
In a possible implementation manner of the first aspect, the palm vein collection module further includes:
and the data transmission unit is connected with the main control unit and is used for transmitting the vein distribution map to an upper computer.
In a possible implementation manner of the first aspect, the data transmission unit is a wireless transmission module or a wired transmission module.
In a possible implementation manner of the first aspect, the palm vein collection module further includes:
and the power supply unit is used for supplying electric energy to the position detection unit, the image acquisition unit, the image preprocessing unit, the main control unit and the light supplement unit.
In a possible implementation manner of the first aspect, the light supplement unit includes: the driving circuit is used for generating a driving signal according to the light supplementing instruction, and the light supplementing lamp group is used for emitting light according to the driving signal;
the input end of the driving circuit is connected with the main control unit, and the output end of the driving circuit is connected with the light supplementing lamp set.
In a possible implementation manner of the first aspect, the fill light lamp set includes a plurality of L ED lamps capable of emitting 940nm infrared light according to the driving signal.
In one possible implementation manner of the first aspect, the image acquisition unit includes:
and the image collector is connected with the main control unit, and a 940nm band-pass filter is arranged at the lens.
In a possible implementation manner of the first aspect, the position detection unit includes:
and the proximity sensor is connected with the main control unit and used for detecting palm position information.
In a possible implementation manner of the first aspect, the main control unit is a single chip or a DSP processor.
In a second aspect, an embodiment of the present application provides a palm vein collection system, including the palm vein collection module of the first aspect.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
this application embodiment, position detecting element detects palm positional information, and with palm positional information conveying to the main control unit, when the distance between palm position and the palm vein collection module is in effective collection within range, main control unit control light filling unit provides the supplementary light source, with the definition that improves the palm vein image that the image acquisition unit gathered, and the image preprocessing unit carries out the preliminary treatment to the palm vein image that the image acquisition unit gathered, can improve the definition of vein distribution map. Consequently, clear palm vein distribution diagram can be gathered to the palm vein collection module of this application embodiment, provides the palm vein distribution diagram of high definition for the host computer to can improve the comparison pass rate in the algorithm.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic block diagram of a palm vein collection module according to an embodiment of the present invention;
fig. 2 is a schematic circuit connection diagram of the light supplement unit according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a palm vein collection module according to another embodiment of the present invention;
fig. 4 is a schematic block diagram of a palm vein collection module according to another embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
Vein recognition is one type of biometric recognition, and a vein recognition system stores a digital image of a vein in a computer system by acquiring an image of the vein in a finger, palm or back of the hand, thereby realizing feature value storage. When vein is compared, a vein image is adopted in real time, the characteristics of the digital image are extracted by means of filtering, image binarization and thinning, and the matching algorithm is adopted to compare and match with vein characteristic values stored in a host computer, so that the identity of an individual is identified and confirmed.
The palm vein utilizes the characteristic that human hemoglobin can absorb near infrared light when passing through the vein, collects vein images under the palm skin, and extracts the vein images to be used as biological characteristics. Compared with other biological identification technologies such as fingerprints, irises of eyes or hand shapes, palm veins are extremely difficult to copy and forge, and the biggest reason is that the biological characteristics are invisible under the palm skin by eyes. In addition, as the palm vein use mode is non-contact, the palm vein cleaner is more sanitary and is suitable for being used in public places. Meanwhile, the palm is natural, so that the palm is more easily accepted by a user.
The traditional palm vein image collector can not collect a clear vein distribution map, and because the collected vein distribution map is not clear, when vein comparison is carried out, the comparison passing rate of an algorithm is reduced, and the experience of a user is influenced.
Based on the above problem, the embodiment of the application provides a palm vein collection module, position detecting element detects palm positional information, and with palm positional information conveying to the main control unit, when the distance between palm position and the palm vein collection module is in effective collection within range, main control unit control light filling unit provides the supplementary light source, with the definition that improves the palm vein image that the image acquisition unit gathered, and the image preprocessing unit carries out the preliminary treatment to the palm vein image that the image acquisition unit gathered, can improve the definition of vein distribution diagram. Consequently, clear palm vein distribution diagram can be gathered to the palm vein collection module of this application embodiment, for the palm vein distribution diagram that the host computer improves the definition to can improve the comparison pass rate in the algorithm.
The palm vein collection module in the embodiment of the present application is described in detail below.
Fig. 1 shows a schematic block diagram of a palm vein collection module provided in an embodiment of the present application, the palm vein collection module may include a position detection unit 20, an image collection unit 40, an image preprocessing unit 50, a main control unit 10, and a light supplement unit 30, the image collection unit 40 is connected to the image preprocessing unit 50, and the main control unit 10 is connected to the position detection unit 20, the image preprocessing unit 50, and the light supplement unit 30, respectively.
Specifically, the image capturing unit 40 captures a palm vein image, while the position detecting unit 20 detects palm position information and transmits the palm position information to the main control unit 10. When the distance between the palm position and the palm vein collection module is in the effective collection range, the main control unit 10 controls the light supplement unit 30 to provide a supplementary light source, so that the definition of the image collection unit 40 for collecting the palm vein image is improved. The image preprocessing unit 50 preprocesses the palm vein image acquired by the image acquisition unit 40 to obtain a clearer vein distribution map, the main control unit 10 transmits the clearer vein distribution map to the upper computer for analysis and comparison, the comparison passing rate is improved, and the experience of a user is further improved.
It should be noted that, when the distance between the palm position and the palm vein capture module is within the effective capture range, the main control unit 10 controls the light supplement unit 30 to provide a light supplement source for the image capture unit 40, so that the image capture unit 40 can capture a clear palm vein image. The main control unit 10 can control the light-emitting degree of the light supplement unit 30 according to the data collected by the position detection unit 20, and provide a proper supplementary light source for the image collection unit 40 to collect the palm vein image, so that the image collection unit 40 can collect a clear palm vein image. For example, when the distance between palm position and the palm vein collection module is great, main control unit 10 can control light filling unit 30 and increase illumination, and when the distance between palm position and the palm vein collection module is less, main control unit 10 can control light filling unit 30 and reduce illumination.
In an embodiment of the present application, the light supplement unit 30 may include a driving circuit 301 and a light supplement lamp set 302, an input end of the driving circuit 301 is connected to the main control unit 10, and an output end of the driving circuit 301 is connected to the light supplement lamp set 302. The driving circuit 301 receives a light supplement instruction sent by the main control unit 10 to generate a driving signal, and the light supplement lamp set 302 emits light according to the driving signal to provide a light supplement source for the image acquisition unit 40 to acquire the palm vein image.
Exemplarily, as shown in fig. 2, a circuit connection schematic diagram of the light supplement unit 30 provided in the embodiment of the present application is shown, wherein the driving circuit 301 is built by relying on an MP2340 chip.
The driving circuit 301 may include a resistor R, a capacitor C, an inductor 1 and a power chip U, the light supplement lamp set 302 may include a resistor R, a light emitting diode D, a VIN terminal of the light emitting diode D and the light emitting diode resistor R, one end of the resistor R is connected to one signal output terminal of the main control unit 10, the other end of the resistor R is connected to one end of the resistor R and an EN terminal of the power chip U, the other end of the resistor R is connected to one end of the capacitor C and ground, the other end of the capacitor C is connected to VIN terminals of the VCC and the power chip U, one end of the capacitor C is connected to the BST terminal of the power chip U, the other end of the capacitor C is connected to one end of the inductor 1 and the SW terminal of the power chip U, the other end of the inductor 1 is connected to one end of the capacitor C, one end of the resistor R and one end of the resistor R, the other end of the resistor R is connected to an anode of the light emitting diode D, a cathode of the light emitting diode D is connected to a cathode of the light emitting diode D, a cathode of the resistor R is connected to a cathode of the light emitting diode D and an FB terminal of the light.
The main control unit 10 generates a light supplement instruction according to the palm position information acquired by the position detection unit 20 and sends the light supplement instruction to the driving circuit 301, the light supplement instruction is divided by the resistor R1 and the resistor R2 and enters the EN end of the power chip U1, the power chip U1 outputs voltage signals at the BST end and the FB end according to the divided light supplement instruction to drive the light supplement lamp set 302 to emit light, wherein the inductor L1 can remove alternating current impurity signals in the voltage signals to ensure that the light supplement lamp set 302 is driven by direct current, the light supplement lamp set 302 can include two parallel light emitting branches, one light emitting branch can include a resistor R6, a light emitting diode D1 and a light emitting diode D2 which are sequentially connected in series, and the other light emitting branch can include a resistor R7, a light emitting diode D3 and a light emitting diode D4. which are sequentially connected in series and emit light under the driving of the voltage signals output by the BST end and the FB end, so that the image acquisition unit 40 can provide a light supplement function when acquiring a palm vein image.
In some embodiments, in order to adjust the brightness of the light emitting diode by the main control unit 10, the light supplement instruction sent by the main control unit 10 may be a PWM pulse signal, and the main control unit 10 adjusts the illumination intensity of the light emitting diode by adjusting a duty ratio of the PWM signal, for example, when the duty ratio of the PWM pulse signal input by the main control unit 10 is zero, the light emitting diode does not emit light, and when the duty ratio of the PWM pulse signal input by the main control unit 10 is 100%, the light emitting intensity of the light emitting diode is maximum.
It should be noted that the composition and construction of the light supplement unit 30 are not limited to the circuit shown in fig. 2, and the schematic circuit connection diagram of the light supplement unit 30 shown in fig. 2 is only for convenience of explaining the working principle of the light supplement unit 30. For example, the driving circuit 301 in the light supplement unit 30 may be built by relying on power chips of other models. For example, the number of the light emitting diodes in the fill light group 302 may be selected according to actual requirements, and is not limited to four.
In one embodiment of the present application, the fill light lamp set 302 may include a plurality of L ED lamps emitting 940nm infrared light according to the driving signal.
Specifically, light emitting diode in light filling banks 302 chooses for use the L ED lamp that can launch 940nm infrared light, and light filling banks 302 is when carrying out the light filling, and the 940nm infrared light of transmission shines when the palm, can make the vein on the palm more clear to improve the definition that image acquisition unit 40 gathered palm vein image.
In an embodiment of the present application, the image capturing unit 40 may include an image capturing device having a lens with a 940nm band-pass filter, and the image capturing device is connected to the main control unit. The 940nm band-pass filter only allows light with the wavelength of 940nm to pass through the lens, and when the palm vein image is collected and light is supplemented, the image collector senses the light with the wavelength of 940nm to collect the palm veins.
For example, the image collector may be a CMOS (Complementary Metal oxide semiconductor) image sensor, which is a typical solid-state imaging sensor. CMOS image sensors typically consist of pixel arrays, row drivers, column drivers, timing control logic, digital-to-analog converters, data bus output interfaces, control interfaces, etc., all of which are typically integrated on the same piece of silicon. The CMOS image sensor can realize the collection of palm vein images, for example, the CMOS image sensor can adopt an OV9281 image sensor.
In an embodiment of the present application, the position detecting unit 20 may include a proximity sensor, and the proximity sensor may collect palm position information (i.e., a distance between the palm and the palm vein collecting module) and transmit the palm position information to the main control unit 10. in the whole process of collecting the palm vein image by the palm vein collecting module, the proximity sensor may always collect the palm position information to implement real-time monitoring of the palm position information.
In an embodiment of the present application, the main control unit 10 may be a single chip microcomputer or a DSP processor, for example, the main control unit 10 may select a single chip microcomputer of STM8 or STM32, or may select a DSP processor of AU3822UC82 signal.
In an embodiment of the present application, the image preprocessing unit 50 may select an ISP image processing chip, for example, an image processing chip with a model of XC 7027. The XC7027 chip has strong image processing capacity, and performs image optimization and processing after receiving the palm vein image to obtain a high-quality output image (i.e. a vein distribution diagram), adjusts the image to a state matched with a palm vein algorithm (i.e. the vein image has clear lines and the palm outline is clear), and improves the algorithm contrast pass rate.
As shown in fig. 3, which is a schematic block diagram of the palm vein collection module provided in the embodiment of the present application, the palm vein collection module may further include a data transmission unit 60 besides the units in fig. 1, where the data transmission unit 60 is connected to the main control unit 10, the data transmission unit 60 transmits the vein distribution map obtained by the image preprocessing unit 50 to an upper computer according to a control instruction of the main control unit 10, and the upper computer compares the vein distribution map with pre-stored data.
In one embodiment of the present application, the data transmission unit 60 may be a wireless transmission module or a wired transmission module. Wherein, the wired transmission module can select a USB module or an I2The C module and the wireless transmission module can select a ZigBee module and a Bluetooth moduleA block or a WIFI module.
As shown in fig. 4, which is a schematic block diagram of the palm vein collection module provided in the embodiment of the present application, the palm vein collection module may further include a power supply unit 70 besides the units in fig. 1, where the power supply unit 70 provides electric energy for the position detection unit 20, the image collection unit 40, the image preprocessing unit 50, the main control unit 10, and the light supplement unit 30.
It should be noted that the power supply unit 70 may output different voltages, for example, 5V, 3.3V, etc., to satisfy the requirement of providing the required voltages for the units in the whole palm vein collection module.
The embodiment of the application also discloses a palm vein collection system, including host computer and any kind of palm vein collection module of the aforesaid. Clear palm vein distribution diagram can be gathered to palm vein collection module and upload to the host computer, and the host computer is compared the discernment to palm vein distribution diagram, realizes authentication's effect. Because the palm vein distribution diagram that the palm vein collection module was gathered is clear higher, consequently can improve the passing rate that the host computer was compared, improve user's experience and feel.
It should be noted that the upper computer may be any device such as a mobile phone, a computer, an access lock, etc.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a palm vein gathers module which characterized in that includes: the device comprises a position detection unit for detecting palm position information, an image acquisition unit for acquiring a palm vein image, an image preprocessing unit for processing the palm vein image to obtain a vein distribution diagram, a main control unit for generating a light supplement instruction according to the palm position information, and a light supplement unit for providing a supplement light source according to the light supplement instruction;
the image preprocessing unit is connected with the image acquisition unit, and the main control unit is connected with the position detection unit, the image preprocessing unit and the light supplement unit.
2. The palm vein collection module of claim 1, further comprising:
and the data transmission unit is connected with the main control unit and is used for transmitting the vein distribution map to an upper computer.
3. The palm vein collection module according to claim 2, wherein the data transmission unit is a wireless transmission module or a wired transmission module.
4. The palm vein collection module of claim 1, further comprising:
and the power supply unit is used for supplying electric energy to the position detection unit, the image acquisition unit, the image preprocessing unit, the main control unit and the light supplement unit.
5. The palm vein collection module according to any one of claims 1 to 4, wherein the light supplement unit comprises: the driving circuit is used for generating a driving signal according to the light supplementing instruction, and the light supplementing lamp group is used for emitting light according to the driving signal;
the input end of the driving circuit is connected with the main control unit, and the output end of the driving circuit is connected with the light supplementing lamp set.
6. The palm vein gathers module of claim 5, characterized in that, light filling lamp group includes a plurality of L ED lamps that can be according to drive signal transmission 940nm infrared light.
7. The palm vein collection module according to any one of claims 1 to 4, wherein the image collection unit comprises:
and the image collector is connected with the main control unit, and a 940nm band-pass filter is arranged at the lens.
8. The palm vein collection module according to any one of claims 1 to 4, wherein the position detection unit comprises:
and the proximity sensor is connected with the main control unit and used for detecting palm position information.
9. The palm vein collection module according to any one of claims 1 to 4, wherein the main control unit is a single chip microcomputer or a DSP processor.
10. A palm vein collection system comprising the palm vein collection module according to any one of claims 1 to 9.
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| CN201922386884.XU CN211015545U (en) | 2019-12-25 | 2019-12-25 | Palm vein collection module and system |
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| CN201922386884.XU CN211015545U (en) | 2019-12-25 | 2019-12-25 | Palm vein collection module and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114943994A (en) * | 2022-05-24 | 2022-08-26 | 厦门熵基科技有限公司 | Control method and device of palm vein recognition system, controller and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114943994A (en) * | 2022-05-24 | 2022-08-26 | 厦门熵基科技有限公司 | Control method and device of palm vein recognition system, controller and storage medium |
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Address after: No.32, Pingshan Industrial Road, Tangxia Town, Dongguan City, Guangdong Province, 523710 Patentee after: Entropy Technology Co., Ltd Address before: 523710 26 Pingshan 188 Industrial Avenue, Tangxia Town, Dongguan, Guangdong Patentee before: Zhongkong Smart Technology Co.,Ltd. |
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