A multi-view finger vein image acquisition device

Abstract

A multi-view finger vein image acquisition device includes a camera module, a lighting module, a driving module and a supporting module. The supporting module is provided with a rotating track. The driving module includes a motor and a rotating handle. The motor is mounted on the supporting module, and the rotating handle is mounted on the motor. The camera module and the lighting module are arranged relatively and connected to the rotating handle respectively. The camera module and the lighting module are also mounted on the rotating track respectively through pulleys. A space for placing a finger is provided between the camera module and the lighting module. The motor drives the rotating handle to rotate, and the rotating handle drives the camera module and the lighting module to rotate synchronously along the rotating track. The camera module performs multi-view photography of the finger, and the lighting module provides illumination of the corresponding viewing angle to the finger during multi-view photography. The present invention uses only a single camera to realize multi-view all-round flexible acquisition of finger veins, greatly reduces the investment cost, simplifies the equipment structure and control program, and realizes high-quality and easy-to-operate multi-view finger vein acquisition at a low cost.

Description

Technical Field

[0001] The invention relates to a multi-viewing angle finger vein image acquisition device. Background Art

[0002] In the era of information technology, identifying identity with a safe and effective method and protecting personal privacy and security have become one of the most critical social issues. Biometric identification technology refers to the technology that uses the inherent physiological characteristics or behavioral characteristics of the human body to identify individuals. Face recognition, fingerprint recognition, iris recognition and finger vein recognition are all biometric identification technologies. However, face recognition, fingerprint recognition and iris recognition have problems such as the system is vulnerable to attack, the characteristics are easily damaged, and the equipment cost is high. Finger vein recognition technology uses the vein pattern image obtained after near-infrared rays penetrate the finger to identify individuals. Compared with other biometric identification technologies, finger vein recognition has the advantages of strong anti-interference, high user-friendliness, not easy to wear and tear, difficult to forge, and liveness detection.

[0003] At present, the research on finger vein recognition has received more and more attention, but the finger vein recognition technology has not been rapidly developed and broken through for a long time, and its application equipment has not been applied and popularized. The research on finger vein recognition is limited to the processing of single-view vein images, and the problems of finger offset and rotation caused by single-view images are difficult to solve; in addition, due to the scarcity of data resources, it is difficult to design targeted deep learning algorithms in this field. Therefore, high-quality and comprehensive datasets are crucial for the research on finger veins. In order to establish these datasets, an image acquisition device dedicated to capturing finger vein texture is required.

[0004] The existing single-view finger vein image acquisition mode can only achieve single-view shooting of veins. The collected vein information is very limited and is very sensitive to the position of the finger. Rotation and translation will produce greatly different vein images, which will affect subsequent processing.

[0005] Existing multi-view acquisition equipment all use a multi-camera shooting system, which is expensive and has complex equipment control procedures. The camera is the most expensive component of the acquisition equipment, and each camera needs a corresponding lighting module, so multi-camera shooting will double the cost of the equipment; in addition, the multi-camera shooting system needs to set up a strict shooting control process so that the near-infrared light source of the corresponding view is illuminated while the light sources of other view angles are turned off, otherwise it will cause overexposure of the finger and blurry finger vein images.

[0006] Existing multi-view acquisition equipment can only capture images at multiple fixed viewpoints, and the number of cameras corresponds to the number of viewpoints of the finger veins, which makes it impossible to achieve truly flexible and omnidirectional finger vein image acquisition.

[0007] In addition, existing finger vein image acquisition equipment rarely takes into account the comfort of the subject during the acquisition process: closed acquisition equipment will make the subject feel fear and anxiety during the acquisition process, and the subject needs to use force to maintain the position of the fingers and control the movement of the palm during the acquisition process, which is quite strenuous.

[0008] It should be noted that the information disclosed in the above background technology section is only used for understanding the background of the present application, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0009] The main purpose of the present invention is to overcome the defects of the above-mentioned background technology and provide a multi-view finger vein image acquisition device.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] A multi-view finger vein image acquisition device comprises a camera module, a lighting module, a driving module and a supporting module, wherein a rotating track is arranged on the supporting module, the driving module comprises a motor and a rotating handle, the motor is mounted on the supporting module, and the rotating handle is mounted on the motor, the camera module and the lighting module are arranged opposite to each other and are respectively connected to two ends of the rotating handle, the camera module and the lighting module are also respectively mounted on the rotating track through pulleys, a space for placing a finger is arranged between the camera module and the lighting module, the motor drives the rotating handle to rotate, and the rotating handle drives the camera module and the lighting module to rotate synchronously along the rotating track, so that the camera module can perform multi-view photography of the finger, and the lighting module provides lighting of corresponding view angles for the finger during multi-view photography.

[0012] Further:

[0013] The camera module and the lighting module are arranged to be kept in a straight line through the rotating handle.

[0014] A control circuit board connected to the motor is arranged on the supporting module.

[0015] The front end of the lighting module is provided with a finger rest for fixing the position of the fingertips of the subject.

[0016] The support module includes a palm support portion arranged above the space for fingers to be placed, the palm support portion is provided with a hole, and the fingers pass through the hole to enter the space for multi-angle camera shooting, and the palm support portion supports the palm when performing multi-angle camera shooting.

[0017] The support module includes a chassis and a bracket, the rotating track and the motor are mounted on the chassis, the bracket extends from one side of the chassis and extends in a cantilevered form to above the space for placing fingers, and the palm support portion is arranged on the bracket.

[0018] The bracket is formed into a horizontal U-shaped structure with an opening facing inward, and the data line of the camera module can pass through the U-shaped structure when rotating with the camera module.

[0019] The lighting module adopts a near-infrared light source, the camera module is equipped with an infrared high-transmittance filter, and the surface of the lighting module facing the finger is covered with a black matte coating to absorb the scattered and reflected light around the finger.

[0020] Two background plates are arranged inside the lighting module, and a light source is arranged in the gap space between the two background plates.

[0021] The rotating handle is provided with two parallel T-shaped structures on the lighting module installation side for supporting the lighting module.

[0022] A multi-view finger vein image acquisition device comprises a camera module, a drive module and a support module, wherein the support module is provided with a rotating track, the drive module comprises a motor and a rotating handle, the motor is mounted on the support module, the rotating handle is mounted on the motor, the camera module is connected to the rotating handle, the camera module is also mounted on the rotating track via a pulley, a space for placing fingers is provided in front of the camera module, the motor drives the rotating handle to rotate, and the rotating handle drives the camera module to rotate along the rotating track, and the camera module performs multi-view photography of fingers under the illumination of natural light.

[0023] The present invention has the following beneficial effects:

[0024] Different from the existing multi-view finger vein acquisition equipment that integrates multiple camera modules, the present invention only uses a single camera, which greatly reduces the investment cost, simplifies the equipment structure and control program, and realizes high-quality and easy-to-operate multi-view finger vein acquisition at a low cost.

[0025] The present invention realizes flexible surround shooting of the finger in all directions by rotating the light source and the camera together, thereby achieving low-cost and high-quality image acquisition. First, a single light source module and a single camera module ensure that the equipment cost is consistent with a single-view acquisition device, and eliminates the cumbersome program control of the light source and the camera. In addition, the simultaneous rotation of the two ensures that the light source and the camera are always located on both sides of the finger, preferably in a straight line, providing the best light source for the current acquisition viewing angle and avoiding the problem of overexposure on both sides of the finger.

[0026] Through program settings, the motor speed and camera shooting interval can be specified, so that all-round and multi-angle flexible shooting of finger veins can be achieved, providing researchers in this field with richer finger vein information.

[0027] Different from the existing closed collection equipment, the present invention adopts an open mode, and the subject can observe the finger status in real time, eliminating the subject's discomfort and tension, and giving the subject a more comfortable collection experience.

[0028] The present invention integrates and connects the camera module, the lighting module and the driving module through an ingenious mechanical structure design, thereby minimizing the equipment space and maximizing the comfort of the subject. At the same time, the mechanical structure design of the present invention makes it very convenient to adjust the position of each module, which can be achieved by simply adding a gasket or reducing the height or length of each part.

[0029] The present invention can realize the acquisition of any viewing angle, can perform 360° photography of finger veins in all directions, and realize the acquisition of finger vein images at any viewing angle.

[0030] The present invention can realize multi-angle finger vein acquisition through a single camera. The present invention realizes multi-angle acquisition of finger veins using only a single camera, and adjusts the capture angle by rotating the camera.

[0031] The present invention is a multi-perspective finger vein acquisition device, which can realize flexible acquisition of finger veins from multiple perspectives in all directions and obtain rich finger vein information. The present invention adopts the mode of rotating shooting with a single camera for the first time, realizing the automatic operation of the equipment at the lowest cost. Based on the acquired images, a multi-perspective finger vein data set can be established to provide high-quality and reliable vein texture images for multi-perspective finger vein recognition, alleviating the problem of scarcity of existing single-perspective vein data and multi-perspective vein data. Due to the scarcity of multi-perspective finger vein data sets, there has been little progress in multi-perspective finger vein recognition algorithms and three-dimensional reconstruction of finger veins in existing research results. The present invention is conducive to promoting the progress of multi-perspective recognition algorithms and three-dimensional reconstruction of finger veins, and makes contributions to the research on finger vein identity recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a schematic structural diagram of a multi-view finger vein image acquisition device according to an embodiment of the present invention.

[0033] Figure 2 It is a schematic structural diagram of the installation part of the lighting module in one embodiment of the present invention.

[0034] Figure 3 The figure is a schematic diagram of the structure of a support module in an embodiment of the present invention.

[0035] Figure 4It is a schematic structural diagram of a rotating handle (with a camera module) in one embodiment of the present invention.

[0036] Figure 5 The present invention is a flowchart of a device used in an embodiment of the present invention.

[0037] Figure 6 This is an image captured of an index finger according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing as well as for coupling or communication.

[0040] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] See also Figures 1 to 4The embodiment of the present invention provides a multi-view finger vein image acquisition device, including a camera module 1, a lighting module 2, a driving module 3 and a supporting module 4, wherein the supporting module 4 is provided with a rotating track 13, the driving module 3 includes a motor 14 and a rotating handle 11, the motor 14 is mounted on the supporting module 4, the rotating handle 11 is mounted on the motor 14, the camera module 1 and the lighting module 2 are arranged opposite to each other and are respectively connected to the two ends of the rotating handle 11, the camera module 1 and the lighting module 2 are also respectively mounted on the rotating track 13 through pulleys, a space for placing a finger is provided between the camera module 1 and the lighting module 2, the motor 14 drives the rotating handle 11 to rotate, and the rotating handle 11 drives the camera module 1 and the lighting module 2 to rotate synchronously along the rotating track 13, so that the camera module 1 performs multi-view photography of the finger, and the lighting module 2 provides corresponding viewing angle lighting for the finger during multi-view photography.

[0043] In a preferred embodiment, the camera module 1 and the lighting module 2 are arranged to be kept in a straight line via the rotating handle 11 .

[0044] In a preferred embodiment, a control circuit board connected to the motor 14 is disposed on the supporting module 4 .

[0045] In a preferred embodiment, a finger rest 15 is provided at the front end of the lighting module 2 for fixing the position of the subject's fingertips.

[0046] In a preferred embodiment, the lighting module 2 includes an inner mounting frame 5 for placing the LED lamp and an outer mounting frame 6 for placing the power supply of the LED lamp.

[0047] In a preferred embodiment, the support module 4 includes a palm support portion 8 arranged above the space for fingers to be placed, and a hole 10 is provided on the palm support portion 8. The fingers pass through the hole 10 to enter the space for multi-angle camera recording. The palm support portion 8 supports the palm when multi-angle camera recording is performed.

[0048] In a preferred embodiment, the support module 4 includes a chassis 7 and a bracket 9, the rotating track 13 and the motor 14 are installed on the chassis 7, the bracket 9 extends from one side of the chassis 7 and extends in a cantilever form to above the space for fingers to be placed, and the palm support part 8 is arranged on the bracket 9.

[0049] In a preferred embodiment, the bracket 9 is formed as a horizontal U-shaped structure with an opening facing inward, so that the data line of the camera module 1 can pass through the U-shaped structure when the camera module 1 rotates.

[0050] In a preferred embodiment, the lighting module 2 uses a near-infrared light source, the camera module 1 is equipped with an infrared high-transmittance filter, and the surface of the lighting module 2 facing the finger is covered with a black matte coating to absorb light scattered and reflected around the finger.

[0051] In a preferred embodiment, two background plates 16 , preferably black background plates, are disposed inside the lighting module 2 , and a light source, preferably an LED or the like, is disposed in the gap space between the two background plates 16 .

[0052] In a preferred embodiment, the rotating handle 11 is provided with two parallel T-shaped structures 12 on the installation side of the lighting module 2 for supporting the lighting module 2 .

[0053] In another embodiment, a multi-view finger vein image acquisition device includes a camera module 1, a drive module 3 and a support module 4, wherein the support module 4 is provided with a rotating track 13, the drive module 3 includes a motor 14 and a rotating handle 11, the motor 14 is mounted on the support module 4, the rotating handle 11 is mounted on the motor 14, the camera module 1 is connected to the rotating handle 11, the camera module 1 is also mounted on the rotating track 13 through a pulley, a space for placing fingers is provided in front of the camera module 1, the motor 14 drives the rotating handle 11 to rotate, and the rotating handle 11 drives the camera module 1 to rotate along the rotating track 13, and under the illumination of natural light, the camera module 1 performs multi-view photography of fingers.

[0054] The specific embodiments of the present invention are further described below.

[0055] In one embodiment, a multi-view finger vein image acquisition device includes a camera module 1, an illumination module 2, a drive module 3 and a support module 4. The drive module 3 includes a handle 11 and a motor 14, the handle 11 is mounted on the motor 14, and the motor 14 is mounted on the support module 4. The camera module includes a black and white industrial camera with an infrared high-transmittance filter and a small directional pulley, which is mounted on a rotating track 13 of the support module 4 and is used to drive the camera to rotate, and can reduce friction resistance during rotation. A gasket can be added above the handle 11 as needed to facilitate the adjustment of the camera height. The camera module 1 is installed on one side of the handle 11, and there are two T-shaped structures 12 on the other side of the handle 11 for installing the illumination module 2, so that the illumination module 2 is driven by the motor 14 to achieve synchronous rotation of the camera module 1. Four nail holes are provided below the illumination module 2, which are aligned with the four nail holes of the two T-shaped structures and assembled together by screws.

[0056] The lighting module 2 uses transmissive lighting and is located on the front and rear sides of the finger placement space together with the camera module 1. The lighting module 2 uses near-infrared LEDs, and the side of the lighting module 2 facing the finger is covered with a black matte coating to absorb the light source scattered and reflected around the finger and improve the quality of the collected image. A finger rest 15 is also provided at the front end of the lighting module 2 to fix the position of the subject's fingertips to prevent them from moving up and down.

[0057] The driving module 3 also includes a control circuit board, which controls the rotation of the stepping motor 14. The supporting module 4 is used to support and fix other components and connect the various components together reasonably and cleverly.

[0058] The support module 4 has a chassis 7 and a palm support 8. The palm support 8 is used to support the palm, making the subject more comfortable during the collection process and fixing the fingers to reduce finger movement. The middle space of the chassis 7 is used to place the stepper motor 14. A rotating track 13 of a certain width is designed on the chassis 7 to facilitate the rotation of the directional pulley along the track, which can be covered with a smooth material to reduce friction resistance.

[0059] The support module 4 further comprises a bracket 9 connecting the chassis 7 and the palm support 8. The bracket 9 is formed into a horizontal U-shaped structure with an opening facing inward, so that the data line of the camera module 1 can pass through the U-shaped structure when the camera module 1 rotates.

[0060] The outside of the camera of the camera module 1 is connected to a data cable connected to a computer and a power cable connected to a power source. The data cable is relatively thick and heavy. Since the camera can rotate 360 ​​degrees, the data cable will also rotate with it, which is easy to cause friction with the bracket 9. The bracket 9 is formed as a horizontal U-shaped structure with an opening facing inward to facilitate the passage of the data cable. The bending degree of the data cable can be reduced during rotation, and the external force rebounding outward will also be reduced, thereby avoiding or reducing the friction between the data cable and the bracket 9, especially its vertical wall. Preferably, the length of the U-shaped structure is greater than the radius of the chassis 7, which can better reduce the friction resistance of the data cable when passing through the U-shaped structure, so that the data cable of the camera module 1 can pass smoothly during rotation.

[0061] During data collection, the device is controlled and the subject provides finger vein information. Figure 5As shown. First, turn on the power of the camera module 1, the lighting module 2 and the drive module 3, connect the camera module 1 to the host end, and then let the subject vertically insert the finger to be collected into the circular hole 10 on the palm support part 8 until the fingertip touches the finger rest 15 on the lighting module 2. Then, the collector presses the button on the control circuit board and the shooting button on the host end at the same time, and the motor 14 will drive the camera module 1 and the lighting module 2 to rotate at a constant speed at the same time, and the finger remains motionless. According to the program settings, the host end instructs the camera to shoot at a certain interval. Finally, the motor 14 will complete a 360-degree rotation, and the host end will receive multiple multi-view images obtained.

[0062] The modules can be assembled together by screws, and each module is detachable and easy to adjust.

[0063] In another alternative embodiment, the lighting module can be replaced with a natural light source, and the infrared high-transmittance filter in the camera module can be removed, so that it can be used as a multi-view finger skin texture acquisition device to achieve image acquisition of finger skin texture.

[0064] Different from the existing multi-view finger vein acquisition equipment that integrates multiple camera modules, the present invention only uses a single camera, which greatly reduces the investment cost, simplifies the equipment structure and control program, and realizes high-quality and easy-to-operate multi-view finger vein acquisition at a low cost.

[0065] By rotating the light source and the camera together, flexible and surround shooting of the finger can be achieved in all directions, achieving low-cost and high-quality image acquisition. First of all, a single light source module and a single camera module ensure that the equipment cost is consistent with the single-view acquisition equipment, and eliminate the cumbersome program control of the light source and camera. In addition, the simultaneous rotation of the two ensures that the light source and the camera are always located on both sides of the finger and remain in a straight line, providing the best light source for the current acquisition perspective and avoiding the problem of overexposure on both sides of the finger.

[0066] Through program settings, the motor speed and camera shooting interval can be specified, so that all-round and multi-angle flexible shooting of finger veins can be achieved, providing researchers in this field with richer finger vein information.

[0067] Different from the existing closed collection equipment, the present invention adopts an open mode, and the subject can observe the finger status in real time, eliminating the subject's discomfort and tension, and giving the subject a more comfortable collection experience.

[0068] The multi-view finger vein images obtained by the present invention can establish a corresponding multi-view finger vein data set, alleviating the current situation where there is little progress in the multi-view finger vein recognition algorithm due to the scarcity of multi-view finger vein related data, providing a reliable data source for the multi-view finger vein recognition algorithm, and promoting the progress and breakthrough of finger vein three-dimensional reconstruction.

[0069] The present invention integrates the camera module, the lighting module and the driving module through an ingenious mechanical structure design, thereby minimizing the equipment space and maximizing the comfort of the subjects. At the same time, the structure makes it very convenient to adjust the position of each module, which can be done by simply adding a gasket or reducing the height or length of each part.

[0070] The present invention can realize the acquisition of any viewing angle, can perform 360° photography of finger veins in all directions, and realize the acquisition of finger vein images at any viewing angle.

[0071] The present invention can realize multi-angle finger vein acquisition through a single camera. The present invention realizes multi-angle acquisition of finger veins using only a single camera, and adjusts the capture angle by rotating the camera.

[0072] The acquisition background uses black matte material, which effectively absorbs reflected and scattered light sources, improves the quality of the acquired finger vein images, and makes subsequent image processing more convenient.

[0073] The embodiment of the present invention adopts a circular chassis, on which a rotating track is arranged, so as to facilitate the rotation of the camera and the light source and reduce the volume of the device.

[0074] The present invention can be used as a multi-view finger vein acquisition device and a multi-view finger skin texture acquisition device. Each module can be assembled together by screws, and each module is detachable and easy to adjust.

[0075] The present invention provides a multi-view and all-round finger vein acquisition device, which provides a brand-new solution for the finger vein acquisition device in terms of mechanical design, overall architecture and acquisition ideas. It can realize 360-degree surround shooting of finger veins, acquire finger vein texture images at any viewing angle, and establish a large-scale, high-quality, multi-view finger vein data set, thereby providing sufficient data resources for the research on finger vein recognition, extending recognition from a single viewing angle to multiple viewing angles, and extending the processing of finger vein images from two-dimensional space to three-dimensional space, thus laying a foundation for three-dimensional reconstruction of finger veins, breaking through the limitations of finger vein recognition, and achieving higher degrees of freedom and flexibility.

[0076] The background section of the present invention may contain background information about the problem or environment of the present invention, but does not necessarily describe the prior art. Therefore, the content included in the background section is not an admission by the applicant that the prior art is available.

[0077] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A multi-view finger vein image acquisition device, characterized in that: The invention comprises a camera module, a lighting module, a driving module and a supporting module, wherein a rotating track is arranged on the supporting module, the driving module comprises a motor and a rotating handle, the motor is mounted on the supporting module, the rotating handle is mounted on the motor, the camera module and the lighting module are arranged opposite to each other and are respectively connected to two ends of the rotating handle, the camera module and the lighting module are also respectively mounted on the rotating track through pulleys, a space for placing fingers is arranged between the camera module and the lighting module, the motor drives the rotating handle to rotate, and the rotating handle drives the camera module and the lighting module to rotate synchronously along the rotating track, so that the camera module can take multi-viewing pictures of the fingers, and the lighting module can take pictures of the fingers in multi-viewing angles. The invention provides lighting of corresponding viewing angles for fingers during multi-angle photography, a finger rest is provided at the front end of the lighting module for fixing the position of the subject's fingertips, the support module comprises a palm support portion arranged above the space for the fingers to be placed, a hole is provided on the palm support portion, the finger passes through the hole into the space until the fingertip touches the finger rest on the lighting module for multi-view photography, the palm support portion supports the palm during multi-view photography, the support module comprises a chassis and a bracket, the rotating track and the motor are mounted on the chassis, the bracket extends from one side of the chassis and extends in a cantilevered form to above the space for the fingers to be placed, and the palm support portion is arranged on the bracket.

2. The multi-view finger vein image acquisition device according to claim 1, characterized in that: The camera module and the lighting module are arranged to be kept in a straight line through the rotating handle.

3. The multi-view finger vein image acquisition device according to claim 1, characterized in that: A control circuit board connected to the motor is arranged on the supporting module.

4. The multi-view finger vein image acquisition device according to any one of claims 1 to 3, characterized in that: The bracket is formed into a horizontal U-shaped structure with an opening facing inward, and the data line of the camera module can pass through the U-shaped structure when rotating with the camera module.

5. The multi-view finger vein image acquisition device according to any one of claims 1 to 3, characterized in that: The lighting module adopts a near-infrared light source, the camera module is equipped with an infrared high-transmittance filter, and the surface of the lighting module facing the finger is covered with a black matte coating to absorb the scattered and reflected light around the finger.

6. The multi-view finger vein image acquisition device according to any one of claims 1 to 3, characterized in that: Two background plates are arranged inside the lighting module, and a light source is arranged in the gap space between the two background plates; and two parallel T-shaped structures are arranged on the lighting module installation side of the rotating handle for supporting the lighting module.

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