Fingerprint acquisition equipment, method and device for optical image

Abstract

The invention provides an optical image fingerprint acquisition device, method and device, and relates to the technical field of biological recognition. Comprising a shell, an acquisition device, a finger placement frame and an image processing module, the acquisition device is arranged in the shell; the finger placing frame is arranged on the shell, and the middle part of the finger placing frame is hollowed out; wherein the hollowed-out area is used for placing a finger of a user, and the acquisition device is used for acquiring a fingerprint of the finger placed in the hollowed-out area; the image processing module is used for receiving and processing the collected fingerprints. According to the scheme, the finger placement frame is arranged, the middle part of the finger placement frame is hollowed out, and the finger is placed in the hollowed-out area of the finger placement frame for fingerprint collection, so that the finger does not make physical contact with the collection device, the fingerprint is prevented from leaving marks on the collection device, and the safety and privacy of fingerprint collection are improved.

Description

Technical Field

[0001] This application relates to the field of biometric technology, and in particular to a fingerprint acquisition device, method and apparatus for optical imaging. Background Technology

[0002] In traditional financial transactions, processes such as manually verifying ID cards and filling out paper forms are time-consuming. Fingerprint collection can achieve "one-click verification," significantly improving processing efficiency, especially in high-frequency trading.

[0003] Existing fingerprint scanners typically require the finger to directly contact the fingerprint sensor during the fingerprint acquisition process. This leaves fingerprint traces on the sensor, posing a risk of fingerprint theft. Furthermore, traditional fingerprint scanners lack detachability and ease of cleaning, and are difficult to integrate with other devices.

[0004] Therefore, this method of fingerprint collection cannot guarantee the security of fingerprint collection. Summary of the Invention

[0005] This application provides an optical image fingerprint acquisition device, method, and apparatus to solve the technical problem that fingerprint acquisition security is low due to fingerprints left on the fingerprint acquisition interface.

[0006] In a first aspect, this application provides an optical imaging fingerprint acquisition device, comprising: a housing, an acquisition device, a finger holder, and an image processing module; the acquisition device is disposed within the housing; the finger holder is disposed on the housing, and the middle portion of the finger holder is hollowed out; wherein, the hollowed-out area is used to place a user's finger, and the acquisition device is used to acquire the fingerprint of the finger placed in the hollowed-out area; the image processing module is used to receive and process the acquired fingerprint.

[0007] In one possible implementation, the finger holder is detachably connected to the housing; wherein the detachable connection includes: a snap-fit ​​connection or a magnetic connection.

[0008] In one possible implementation, the location of the data acquisition device corresponds to the vertical direction of the hollowed-out area.

[0009] In one possible implementation, the acquisition device consists of a light source assembly and an optical sensor; the optical sensor is positioned vertically corresponding to the hollowed-out area and is used to receive light reflected from the finger surface to generate a fingerprint image; the light source assembly is positioned adjacent to the optical sensor and is used to provide light to illuminate the finger surface.

[0010] In one possible implementation, the acquisition device is electrically connected to the image processing module for transmitting the acquired fingerprint image to the image processing module.

[0011] In one possible implementation, a USB interface and / or a Bluetooth module are used to transmit the acquired fingerprint data to a connected second device.

[0012] In one possible implementation, guide protrusions are provided at the four corners of the finger holder, which are used to locate the position of the finger.

[0013] Secondly, this application provides a fingerprint acquisition method applied to the fingerprint acquisition device described above, comprising: responding to a fingerprint acquisition command, activating the acquisition device to acquire a fingerprint of a finger placed in a hollow area; and processing the acquired fingerprint to obtain fingerprint data.

[0014] In one possible implementation, activating the acquisition device to acquire a fingerprint placed in the cutout area includes:

[0015] The light source assembly and optical sensor are activated; the light source assembly provides light to illuminate the surface of the finger, and the optical sensor receives the light reflected from the surface of the finger to generate a fingerprint image.

[0016] Thirdly, this application provides a fingerprint acquisition device, comprising: an acquisition module, configured to, in response to a fingerprint acquisition command, activate the acquisition device to acquire a fingerprint of a finger placed in a hollow area; and a processing module, configured to process the acquired fingerprint to obtain fingerprint data.

[0017] In one possible implementation, the acquisition module is also used to activate the light source assembly and the optical sensor; the light source assembly provides light to illuminate the surface of the finger, and the optical sensor receives the light reflected from the surface of the finger to generate a fingerprint image.

[0018] This application provides an optical imaging fingerprint acquisition device, method, and apparatus, comprising: a housing, an acquisition device, a finger holder, and an image processing module; the acquisition device is disposed within the housing; the finger holder is disposed on the housing, and the middle portion of the finger holder is hollowed out; wherein, the hollowed-out area is used to place the user's finger, and the acquisition device is used to acquire the fingerprint of the finger placed in the hollowed-out area; the image processing module is used to receive and process the acquired fingerprint. This solution, by setting the finger holder with a hollowed-out middle portion, allows fingerprint acquisition by placing the finger in the hollowed-out area of ​​the finger holder, thus preventing physical contact between the finger and the acquisition device, thereby avoiding fingerprints leaving marks on the acquisition device and improving the security and privacy of fingerprint acquisition. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1A schematic diagram of an optical image fingerprint acquisition device provided in this application;

[0021] Figure 2 A top view of an optical imaging fingerprint acquisition device provided in this application;

[0022] Figure 3 A flowchart illustrating a fingerprint acquisition method provided in this application;

[0023] Figure 4 This is a schematic diagram of the structure of a fingerprint acquisition device provided in this application.

[0024] Figure label:

[0025] 100: Finger rest;

[0026] 200: Data acquisition device;

[0027] 201: Optical components;

[0028] 202: Optical sensor;

[0029] 300: Indicator bump;

[0030] 400: USB interface;

[0031] 401: USB cable;

[0032] 500: Housing.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, storage, use, processing, transmission, provision, disclosure, and application of the relevant data all comply with the relevant laws, regulations, and standards of the relevant countries and regions, have taken necessary confidentiality measures, do not violate public order and good morals, and provide corresponding operation access points for users to choose to authorize or refuse.

[0036] Furthermore, the technical solution involved in this application, which involves big data analysis of user information (including but not limited to personal biometrics, identity data, consumption data, asset data, electronic terminal operation data, etc.) and the use of artificial intelligence technology for automated decision-making, and makes decisions that have a significant impact on personal rights based on the results of automated decision-making, provides users with corresponding operation entry points for users to choose to agree to or reject the results of automated decision-making; if the user chooses to reject, the process will proceed to the expert decision-making process.

[0037] It should be noted that the fingerprint acquisition device, method and apparatus for optical images provided in this application can be used in the field of biometrics, or in any field other than biometrics. The application field of the fingerprint acquisition device, method and apparatus for optical images in this application is not limited.

[0038] In traditional financial transactions, processes such as manually verifying ID cards and filling out paper forms are time-consuming. Fingerprint collection enables "one-click verification," significantly improving processing efficiency, especially in high-frequency transactions. With the continuous development of fintech, fingerprint collection technology will be deeply integrated with technologies such as blockchain, artificial intelligence, and big data, providing financial institutions with stronger risk control, customer service, and operational management capabilities. For example, by analyzing transaction behavior data such as fingerprint usage frequency and time, combined with big data technology, abnormal transactions can be monitored more accurately and financial fraud can be prevented; blockchain technology can achieve decentralization and traceability of fingerprint recognition transactions, improving the transparency and trustworthiness of financial transactions.

[0039] However, existing fingerprint scanners typically require the finger to directly contact the fingerprint sensor during the fingerprint acquisition process. This leaves fingerprint traces on the sensor, posing a risk of fingerprint theft. Furthermore, traditional fingerprint scanners lack detachability and ease of cleaning, and are difficult to integrate with other devices.

[0040] Therefore, this method of fingerprint collection cannot guarantee the security of fingerprint collection.

[0041] To address the technical problem that the aforementioned fingerprint acquisition methods cannot ensure the security of fingerprint acquisition, this application provides an optical imaging fingerprint acquisition device, method, and apparatus, comprising: a housing, an acquisition device, a finger holder, and an image processing module; the acquisition device is disposed within the housing; the finger holder is disposed on the housing, and the middle portion of the finger holder is hollowed out; wherein, the hollowed-out area is used to place the user's finger, and the acquisition device is used to acquire the fingerprint of the finger placed in the hollowed-out area; the image processing module is used to receive and process the acquired fingerprint. This solution, by setting up a finger holder with a hollowed-out middle portion, allows fingerprint acquisition by placing the finger in the hollowed-out area of ​​the finger holder, preventing physical contact between the finger and the acquisition device, thereby avoiding fingerprints leaving marks on the acquisition device and improving the security and privacy of fingerprint acquisition.

[0042] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0043] Example 1

[0044] Figure 1 This is a schematic diagram of an optical imaging fingerprint acquisition device provided in this application, as shown below. Figure 1 As shown, the fingerprint acquisition device using optical imaging includes: a housing 500, an acquisition device 200, a finger holder 100, and an image processing module;

[0045] The data acquisition device 200 is housed within the casing 500;

[0046] A finger holder 100 is mounted on the housing 500, and the middle part of the finger holder 100 is hollowed out; the hollowed-out area is used to place the user's finger, and the collection device 200 is used to collect the fingerprint of the finger placed in the hollowed-out area.

[0047] The image processing module is used to receive and process the collected finger fingerprints.

[0048] The size of the cutout area can be set according to requirements, but the cutout area must be at least larger than the effective fingerprint area of ​​the finger; the image processing module is the back-end module of the fingerprint acquisition device used to process the received fingerprint image; in practical applications, after the acquisition device 200 acquires the fingerprint of the finger placed in the cutout area, it transmits the acquired fingerprint image to the image processing module for processing via USB cable 401.

[0049] Specifically, the user places their finger in the hollowed-out area of ​​the finger holder 100, and the fingerprint acquisition device 200 acquires the fingerprint of the finger in that area and then transmits the acquired fingerprint image to the image processing module via the USB cable 401.

[0050] This embodiment provides an optical imaging fingerprint acquisition device, including: a housing, an acquisition device, a finger holder, and an image processing module; the acquisition device is disposed within the housing; the finger holder is disposed on the housing, and the middle portion of the finger holder is hollowed out; the image processing module is used to receive and process the acquired fingerprint. This solution, by setting the finger holder with a hollowed-out middle portion, allows fingerprint acquisition by placing the finger in the hollowed-out area of ​​the finger holder, thus preventing physical contact between the finger and the acquisition device, avoiding fingerprints leaving marks on the acquisition device, and improving the security and privacy of fingerprint acquisition.

[0051] In one possible implementation, the finger holder 200 is detachably connected to the housing 500; wherein the detachable connection includes: a snap-fit ​​connection or a magnetic connection.

[0052] Specifically, the finger holder 200 is detachably connected to the housing 500, facilitating the removal of the finger holder 200 for cleaning the fingerprint acquisition device 200 and the finger holder 200 located inside the housing 500. In practical applications, dust, fibers, dander, and external debris from the environment can adhere to the surface of the acquisition device, obscuring fingerprint details and reducing the accuracy of fingerprint acquisition. The detachable connection between the finger holder 200 and the housing 500 improves cleaning convenience; when cleaning the fingerprint acquisition device is required, the finger holder 200 can be directly detached from the housing 500, allowing direct contact with the acquisition device 200 to clean the light source assembly 201 and the optical sensor 202. This prevents dust and dander from adhering to the light source assembly 201, which could lead to uneven light supply, and also prevents dust and dander from adhering to the optical sensor 202, which could cause noise in the acquired fingerprint image.

[0053] By detachably connecting the finger holder to the housing, the fingerprint collection device is easy to clean and ensures the integrity of the fingerprints collected.

[0054] In one possible implementation, the position of the acquisition device 200 corresponds to the vertical direction of the hollowed-out area.

[0055] Specifically, such as Figure 1As shown, the fingerprint sensor 200 is located inside the housing 500, and its position corresponds vertically to the hollowed-out area of ​​the finger holder 100. Viewed from the direction of the finger holder 100, the fingerprint sensor 200 is located directly below it. This vertical alignment minimizes the distance between the fingerprint sensor 200 and the finger holder 100, reducing light refraction loss and preventing fingerprint deformation caused by the sensor being positioned sideways.

[0056] In one possible implementation, the acquisition device 200 consists of a light source assembly 201 and an optical sensor 202; the optical sensor 202 is positioned to correspond to the vertical direction of the cutout area, and the optical sensor 202 is used to receive light reflected from the finger surface to generate a fingerprint image.

[0057] The light source assembly 201 is positioned adjacent to the optical sensor 202, and the light source assembly 201 is used to provide light to illuminate the surface of the finger.

[0058] The light source component 201 employs uniformly distributed LED light sources. Specifically, uniformly distributed LED light sources ensure consistent light intensity across all areas of the finger surface, preventing localized overexposure or underexposure. This avoids "shadow areas" or "reflective areas" caused by uneven illumination, which can blur fingerprint edges or cause overexposure in the center, affecting the integrity of fingerprint acquisition. The optical sensor 202 uses a high-resolution complementary metal-oxide-semiconductor (CMOS) sensor. A CMOS sensor is a device that utilizes semiconductor technology to achieve photoelectric conversion and is widely used in photography, security, biometrics such as fingerprint acquisition, and medical imaging. In fingerprint acquisition devices, the CMOS sensor captures fingerprints by capturing reflected or scattered light signals.

[0059] Specifically, the optical sensor 202 is positioned vertically relative to the cutout area; viewed from the direction of the finger holder 100, the optical sensor 202 is located directly below the finger holder 100; the light source assembly 201 is installed adjacent to the optical sensor 202; viewed from the direction of the optical sensor 202, the light source assembly 201 is installed directly behind and adjacent to the optical sensor 202.

[0060] In practical applications, the user places their finger in the hollowed-out area of ​​the finger holder 100. The light source assembly 201 provides a uniformly distributed LED light source to illuminate the finger surface. The optical sensor 202 receives the light reflected from the finger surface to generate a finger image, and transmits the acquired fingerprint image to the image processing module via a USB cable 401. By employing optical fingerprint reading technology, high-resolution fingerprint images can be obtained, improving the accuracy and reliability of fingerprint recognition.

[0061] In one possible implementation, the acquisition device 200 is electrically connected to the image processing module for transmitting the acquired fingerprint image to the image processing module.

[0062] The electrical connection between the acquisition device 200 and the image processing module is mainly divided into two categories: analog signal transmission and digital signal transmission. The image processing module uses algorithms to denoise, enhance, and extract features from the acquired fingerprint image to obtain fingerprint feature data for identification. For example, the analog signal output by the acquisition module is amplified by an amplifier, and the amplifier's output is connected to the signal input of the fingerprint image processing module. Then, the image processing module performs discharge and analog-to-digital processing on the fingerprint image data to reduce background noise, improve fingerprint image quality, and obtain fingerprint feature data for identification. The electrical connection between the acquisition device and the image processing module can prevent pixel loss or misalignment in the fingerprint image before processing, which would affect subsequent feature extraction.

[0063] In one possible implementation, the fingerprint acquisition device for optical imaging further includes:

[0064] USB interface 400 and / or Bluetooth module, the USB interface 400 and / or Bluetooth module are used to transmit the acquired fingerprint data to a connected second device.

[0065] The Universal Serial Bus (USB) interface is a standardized interface widely used in computers, consumer electronics, and mobile devices to enable data transmission, power supply, and communication between devices. Specifically, fingerprint acquisition devices also include a USB interface and / or a Bluetooth module, embedding the fingerprint acquisition device into a second device, such as a smart lock, mobile phone, or computer.

[0066] In practical applications, the fingerprint sensor is integrated into smart locks via a USB interface 400. For example, when a user places their finger in the perforated area, the light source component illuminates the finger surface, and the optical sensor collects the reflected light to generate a fingerprint image. This image is then transmitted via USB to an image processing module for processing, which extracts the fingerprint's feature data. This fingerprint feature data is then matched against stored fingerprint data; if a match is found, the lock opens. The fingerprint sensor supports embedding into other devices via USB and / or Bluetooth modules, making it widely applicable.

[0067] In one possible implementation, Figure 2 A top view of an optical imaging fingerprint acquisition device provided in this application, such as... Figure 2 As shown, guide protrusions 300 are provided at the four corners of the finger holder 100. The guide protrusions 300 are used to locate the position of the finger.

[0068] Specifically, when collecting fingerprints, without positioning points, the fingerprint collection area will deviate from the range that the collection device 200 can collect, resulting in incomplete fingerprints. For example, if the fingerprint is mainly suspended at the edge of the cutout area, the collection device 200 will only be able to collect the fingerprint at the edge of the finger. Therefore, guiding protrusions 300 are set to position the finger to ensure that the fingerprint collection area is covered by the collection device 200.

[0069] The fingerprint acquisition device has a rectangular structure. Guiding protrusions 300 are provided at each of the four corners of the finger placement bracket 100 to guide and calibrate the finger placement position, increasing the usability of fingerprint information. In practical applications, the user places their finger on the guiding protrusions 300, with the fingerprint to be acquired suspended in the hollowed-out area of ​​the finger placement bracket 100; this prevents physical contact between the finger and the acquisition device 200, thus avoiding fingerprint residue. The guiding protrusions guide the finger placement position, preventing misalignment or excessive deviation between the fingerprint area to be acquired and the acquisition device in the vertical direction, which could lead to inaccurate fingerprint acquisition.

[0070] Example 2

[0071] Figure 3 This application provides a flowchart illustrating a fingerprint acquisition method, as shown below. Figure 3 As shown, the fingerprint acquisition device applied to the above-mentioned optical image, and the fingerprint acquisition method provided in this application embodiment, include:

[0072] S301, in response to the fingerprint acquisition command, activates the acquisition device to acquire the fingerprint of the finger placed in the hollow area;

[0073] S302, process the collected fingerprint to obtain fingerprint data.

[0074] Specifically, the user places their finger on the guide protrusion of the finger holder, with the fingerprint collection area suspended in the hollow area of ​​the finger holder, triggering the collection device; the collection device responds to the fingerprint collection command and begins to collect the fingerprint of the finger placed in the hollow area; the collected fingerprint is processed to obtain fingerprint data.

[0075] In practical applications, for example, fingerprint collection devices can be embedded in smart door locks. When a user needs to unlock the lock, they place their finger on the guide point. The collection device responds to the fingerprint collection command, captures the user's fingerprint image, and transmits it to the image processing module for processing. The module extracts the fingerprint's feature data for identification. This feature data is then matched with stored fingerprint data; if a match is found, the lock opens. By designing a perforated collection area, direct contact between the finger and the device is avoided, preventing fingerprint residue and improving the security and privacy of fingerprint collection.

[0076] In one possible implementation, activating the acquisition device to acquire a fingerprint placed in the cutout area includes:

[0077] The light source assembly and optical sensor are activated; the light source assembly provides light to illuminate the surface of the finger, and the optical sensor receives the light reflected from the surface of the finger to generate a fingerprint image.

[0078] Combining with the previous example, the acquisition device is activated to acquire the fingerprint of a finger placed in the hollow area. Specifically, the light source assembly and optical sensor are activated; the light source assembly provides a uniform light source to illuminate the finger surface, the raised parts of the fingerprint directly reflect the light, and the concave parts of the fingerprint are dark due to fiber optic scattering or inability to reflect directly; the optical sensor receives the reflected light to generate a fingerprint image.

[0079] In practical applications, the user places their finger on the guide protrusions of the finger holder, with the fingerprint collection area suspended above the cutout area of ​​the finger holder, triggering the collection device to activate the light source component and optical sensor. The light source component provides light to illuminate the surface of the finger placed in the cutout area, and the optical sensor receives the light reflected from the finger surface to generate a fingerprint image. The collected fingerprint is then processed to obtain fingerprint data.

[0080] Example 3

[0081] Figure 4 This application provides a schematic diagram of the structure of a fingerprint acquisition device, as shown below. Figure 4 As shown, the fingerprint acquisition device 400 provided in this embodiment includes:

[0082] The acquisition module 401 is used to respond to the fingerprint acquisition command and start the acquisition device to acquire the fingerprint of the finger placed in the hollow area;

[0083] The processing module 402 is used to process the collected finger fingerprints to obtain fingerprint data.

[0084] This embodiment provides a fingerprint acquisition device that can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0085] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0086] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0087] It should be understood that the above-described device embodiments are merely illustrative, and the device of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0088] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of this application can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0089] When integrated units / modules are implemented in hardware, the hardware can be digital circuits, analog circuits, etc. The physical implementation of the hardware structure includes, but is not limited to, transistors, memristors, etc. Unless otherwise specified, the processor can be any suitable hardware processor, such as a CPU, GPU, FPGA, DSP, and ASIC, etc. Unless otherwise specified, the storage unit can be any suitable magnetic or magneto-optical storage medium, such as Resistive Random Access Memory (RRAM), Dynamic Random Access Memory (DRAM), Static Random Access Memory (SRAM), Enhanced Dynamic Random Access Memory (EDRAM), High-Bandwidth Memory (HBM), Hybrid Memory Cube (HMC), etc.

[0090] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0091] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0092] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An optical image-based fingerprint acquisition device, characterized by Comprising: a shell, a collection device, a finger placement rack, an image processing module; the collection device is arranged in the shell; the finger placement rack is arranged on the shell, and a middle part of the finger placement rack is arranged in a hollow manner; wherein the hollow area is used for placing a user's finger, and the collection device is used for collecting the fingerprint of the finger placed in the hollow area; the image processing module is used for receiving and processing the collected fingerprint.

2. The fingerprint acquisition device of claim 1, wherein, Further comprising: the finger placement rack is detachably connected with the shell; wherein the detachable connection includes buckle connection or magnetic attraction connection.

3. The fingerprint acquisition device of claim 1, wherein, The arrangement position of the collection device corresponds to the hollow area in the vertical direction.

4. The fingerprint acquisition device of claim 3, wherein, Further comprising: the collection device is composed of a light source assembly and an optical sensor; the arrangement position of the optical sensor corresponds to the hollow area in the vertical direction, and the optical sensor is used for receiving light reflected from the surface of the finger to generate a fingerprint image; the arrangement position of the light source assembly is adjacent to the optical sensor, and the light source assembly is used for providing light source to irradiate the surface of the finger.

5. The fingerprint acquisition device of claim 1, wherein, The collection device is electrically connected with the image processing module, so as to transmit the collected fingerprint image to the image processing module.

6. The fingerprint acquisition apparatus of claim 1, wherein, Further comprising: a USB interface and / or a Bluetooth module, which are used for transmitting the acquired fingerprint data to a connected second device.

7. The fingerprint acquisition apparatus of claim 1, wherein, The four corners of the finger placement rack are provided with guiding convex points, which are used for positioning the placement position of the finger.

8. A method of capturing a fingerprint, characterized by, Applied to the fingerprint collection device as claimed in claims 1-7, comprising: in response to a fingerprint collection instruction, starting the collection device to collect the fingerprint of the finger placed in the hollow area; processing the collected fingerprint of the finger to obtain fingerprint data.

9. The method of claim 8, wherein, The starting of the collection device to collect the fingerprint of the finger placed in the hollow area comprises: starting the light source assembly and the optical sensor; the light source assembly provides light source to irradiate the surface of the finger, and the optical sensor receives light reflected from the surface of the finger to generate a fingerprint image.

10. A fingerprint acquisition device, characterized by Comprising: an acquisition module, used for starting the collection device to collect the fingerprint of the finger placed in the hollow area in response to a fingerprint collection instruction; a processing module, used for processing the collected fingerprint of the finger to obtain fingerprint data.

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