Target focusing method and system based on micro zoom and rotatable camera array

Abstract

The invention relates to a target focusing method and system based on micro zooming and a rotatable camera array, and the method comprises the steps: sending an image collection instruction to a plurality of groups of camera terminals, each group of camera terminals comprises a plurality of cameras disposed on a ceiling, and the plurality of cameras are disposed in an array according to a preset installation angle; each camera is a micro-zoom camera and completes focal length range setting in advance, and when the camera terminal receives the image acquisition instruction, each camera performs image focusing acquisition on the target in the respective preset jurisdiction area. The image acquisition method and device have the effects of reducing the cost of image acquisition equipment and improving the efficiency of image focusing acquisition at the same time.

Description

Technical Field

[0001] This application relates to the technical field of camera focusing, and in particular to a target focusing method and system based on a micro-zoom, rotatable camera array. Background Technology

[0002] Among the existing ceiling image acquisition devices, there are methods that use a combination of panoramic cameras and PTZ cameras to focus and acquire images of targets below. The panoramic camera is used to cruise and locate the position of the target below, and the PTZ camera is controlled to rotate to the target and adjust the focus to capture images of the target.

[0003] However, the large rotation range and wide zoom range of the PTZ camera result in high equipment costs. Furthermore, when multiple targets need to be captured, the repeated rotation and focusing also lead to low image acquisition efficiency, which needs to be improved. Summary of the Invention

[0004] To reduce the cost of image acquisition equipment and improve the efficiency of image focusing and acquisition, this application provides a target focusing method and system based on a micro-zoom, rotatable camera array.

[0005] The above-mentioned objective of this application is achieved through the following technical solution:

[0006] A target focusing method based on a micro-zoom, rotatable camera array includes the following steps:

[0007] Image acquisition commands are sent to several groups of camera terminals. Each group of camera terminals includes several cameras installed on the ceiling. The several cameras are arranged in an array according to a preset installation angle. Each camera is a micro-zoom camera and the focal length range is preset.

[0008] When the camera terminal receives an image acquisition command, each camera focuses and acquires an image of the target within its respective preset jurisdiction area.

[0009] By adopting the technical scheme, all targets to be imaged below are covered by the plurality of groups of camera terminals, each group of camera terminals is composed of a plurality of cameras capable of realizing micro zoom and small-angle rotation, the reduction of the focusing range and the rotation range can reduce the cost of the camera equipment, the cameras are arrayed and arranged according to a certain angle in advance, and the focal length range is pre-set, that is, each camera has been assigned a target to be focused and photographed, when an image acquisition instruction is received, each camera only needs to be responsible for focusing and photographing the target in the jurisdiction area, when there are multiple targets in the jurisdiction area, since the targets belong to the same jurisdiction area and are close to each other, the depth of field is close, the camera can complete the focusing and photographing through micro zoom, the rotation amplitude is small and there is no need for large focal length adjustment, and the image focusing and collecting efficiency of the target is improved.

[0010] Optionally, the plurality of cameras are arrayed according to the preset installation angle, including that the plurality of cameras are arranged in a column in a ceiling, and when the cameras are installed, the camera located at the center of the column is vertically downward, and the remaining plurality of cameras in the column are lifted by a preset angle from the center to both sides.

[0011] By adopting the technical scheme, the plurality of cameras are arranged in a column, and when the cameras are installed, the cameras at both ends of the column are lifted away from the center of the column, and the small-angle rotation of the cameras enables the cameras to cover targets at different depths of field on both sides of the arrangement direction, so that the range spreading to both sides of the arrangement direction is covered.

[0012] Optionally, each camera focuses and collects images of the target in the respective preset jurisdiction area, and the method further includes: when the respective preset jurisdiction area of each camera includes two or more targets, each camera focuses and collects images of the multiple targets in the respective preset jurisdiction area one by one according to a preset rotation path.

[0013] By adopting the technical scheme, since each camera can rotate by a small amplitude, when there are two or more targets in the preset jurisdiction area of each camera, each camera focuses and collects images of the targets one by one, and needs to rotate the lens by a small amplitude to form a rotation path, since the installation angles of the cameras are different, by setting the rotation path in the respective preset jurisdiction area, the rapid focusing of the multiple targets can be realized, and the efficiency of the image focusing and collecting of the target is improved.

[0014] Optionally, in the step of focusing and collecting images of the multiple targets in the respective preset jurisdiction area one by one according to a preset rotation path by each camera, the step includes:

[0015] The camera focuses and collects images of a first target in the current preset jurisdiction area based on a preset focal length range;

[0016] acquire rotation path information, and send a rotation instruction to the camera based on the rotation path information, the rotation instruction including a rotation angle parameter and a rotation direction parameter;

[0017] The camera rotates to face the second target based on the rotation angle parameter and the rotation direction parameter.

[0018] Based on the focal length range, the camera matches the focal length parameter of the second target and then performs image focusing collection.

[0019] By adopting the above technical solution, when the camera performs image focusing collection on multiple targets in the preset jurisdiction area one by one, the targets are sorted based on the number of targets, that is, the first target, the second target, the third target, and the Nth target, N being a positive integer. The preset rotation path information, that is, the angle of each rotation and the direction of each rotation, is used to realize the rotation path of the first target to the Nth target in turn. The target and the parameter of the previous rotation are matched with the corresponding focal length parameter, so that the camera can automatically match the focal length parameter required by the target when it rotates to the target. After all the target image focusing collection is completed, the efficiency of target image focusing collection is improved.

[0020] Optionally, after the step of the camera matching the focal length parameter of the second target and then performing image focusing collection based on the focal length range, the method further includes the following steps:

[0021] When the camera completes the image focusing collection of all the targets in the preset jurisdiction area, a rotation instruction is sent to the camera to make the camera return to the starting position of the preset rotation path.

[0022] Before the camera performs the next target image focusing collection, it is determined whether the current position information of the camera matches the first target in the preset jurisdiction area.

[0023] If the current position information does not match the first target, an angle adjustment instruction is sent to the camera terminal to make each camera rotate to face the first target in the respective preset jurisdiction area and match the focal length parameter of the first target.

[0024] By adopting the technical scheme, after the camera completes image focusing collection of all targets in the preset jurisdiction area, the camera returns to the starting position, facilitating image focusing next time; in order to prevent the camera from not accurately returning to the starting position of the rotation path due to a fault, before starting image focusing collection of the preset jurisdiction area next time, whether the position of the camera returns to the angle of facing the first target is judged by the rotation path information, if not accurately returned, the angle of the camera is adjusted by the angle adjustment instruction different from the rotation instruction, so that the camera accurately returns to the starting position of the rotation path, and two different instructions are used to adjust the rotation position of the camera, ensuring the accuracy of the rotation path.

[0025] Optionally, based on the focal length range, after the step of the camera matching the focal length parameter of the second target and performing image focusing collection, the step includes:

[0026] When the camera completes image focusing collection of all targets in the preset jurisdiction area this time, the last target in the preset jurisdiction area performing image focusing collection is set as the first target of the camera performing image focusing collection in the preset jurisdiction area next time;

[0027] Based on the re-set first target, the rotation path information is switched.

[0028] By adopting the technical scheme, the rotation path information can not be changed when the camera is reset by using the rotation instruction and the angle adjustment instruction, but the rotation instruction needs to be sent multiple times, so the homing rotation link of the camera can be saved by setting the position of the last image focusing collection target as the first target of image focusing collection next time. Since the first target of each rotation is different within a certain period, multiple rotation path information can be modified and stored for switching, the corresponding rotation path information can be matched by identifying the first target of image focusing collection each time, the rotation frequency of the camera is reduced, the probability of failure is reduced, and the efficiency of image focusing collection is improved.

[0029] Optionally, the step of switching the rotation path information based on the re-set first target includes:

[0030] The first target of the camera in the preset jurisdiction area this time is set as the second target of the camera in the preset jurisdiction area next time;

[0031] Based on the position information between the re-set first target and the re-set second target, the corresponding rotation path information is re-matched and switched.

[0032] By adopting the technical scheme, the last target collected in the current target image focusing collection in a preset jurisdiction area is taken as the first target for the next collection, and the first target collected in the current collection is taken as the second target for the next collection, so that only the rotation path information of the first two targets changes, and the rotation path information of the subsequent targets remains unchanged, thereby reducing the complexity of setting multiple rotation path information and reducing the calling of calculation power.

[0033] The second application purpose is achieved by the following technical scheme:

[0034] A target focusing system based on a micro zoom and a rotatable camera array, comprising:

[0035] A control module configured to send image collection instructions to a plurality of groups of camera terminals, each group of the camera terminals including a plurality of cameras arranged in a ceiling, the plurality of cameras being arranged in a preset array of installation angles, each camera being a micro zoom camera and having a preset focal length range;

[0036] A collection module configured to collect images of targets in a preset jurisdiction area of each camera when the camera terminals receive the image collection instructions.

[0037] The third application purpose is achieved by the following technical scheme:

[0038] A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the target focusing method based on the micro zoom and the rotatable camera array.

[0039] The fourth application purpose is achieved by the following technical scheme:

[0040] A computer readable storage medium, the computer readable storage medium stores a computer program, the computer program is executed by a processor to implement the steps of the target focusing method based on the micro zoom and the rotatable camera array.

[0041] In summary, the present application has at least one of the following beneficial technical effects:

[0042] 1. Each group of camera terminals is composed of several cameras that can realize micro zoom and small angle rotation. The reduction of the focusing range and rotation range can reduce the cost of the camera equipment. The cameras are arrayed and arranged according to a certain angle in advance, and the focal length range is pre-set. Each camera only needs to be responsible for focusing and shooting the target in the respective jurisdiction area. When there are multiple targets in the jurisdiction area, since the positions of the targets belong to the same jurisdiction area and are relatively close, the depth of field is relatively close, and the camera can complete the focusing and shooting through micro zoom, the rotation amplitude is small, and there is no need for large amplitude focal length adjustment, which improves the image focusing and collecting efficiency of the target;

[0043] 2. The several cameras are arranged in a column, and when installed, the cameras at both ends of the column are lifted away from the center of the column, and the small angle rotation of the cameras enables the cameras to cover the targets at different depths of field on both sides of the arrangement direction, thereby realizing the coverage of the range spreading to both sides of the arrangement direction as the center axis.

[0044] 3. Since the installation angles of each camera are different, by setting the rotation paths in the respective pre-set jurisdiction areas, the rapid focusing of multiple targets can be realized, and the efficiency of image focusing and collecting of the target is improved.

[0045] 4. Since the first target of each rotation is different within a certain period, multiple rotation path information can be modified and stored for switching. Through the identification of the first target of each image focusing and collecting, the corresponding rotation path information can be matched out, the rotation frequency of the camera can be reduced, and the probability of failure can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is an implementation flowchart of the target focusing method embodiment of the application based on micro zoom and rotatable camera array;

[0047] Figure 2 is an installation angle diagram of the camera in the target focusing method embodiment of the application based on micro zoom and rotatable camera array;

[0048] Figure 3 is an implementation flowchart of step S21 in the target focusing method embodiment of the application based on micro zoom and rotatable camera array;

[0049] Figure 4 is a principle block diagram of the computer device of the application. DETAILED DESCRIPTION

[0050] The application will be further described in detail below with reference to the accompanying drawings. Figures 1-4 The application will be further described in detail below with reference to the accompanying drawings.

[0051] In the embodiments, as Figure 1As shown, the present application discloses a target focusing method based on micro zoom and rotatable camera array, which specifically comprises the following steps:

[0052] S1: send image acquisition instructions to a plurality of camera terminals, each camera terminal comprising a plurality of cameras arranged in a ceiling, the plurality of cameras being arranged in an array according to a preset installation angle, each camera being a micro zoom camera and having a pre-set focal length range;

[0053] In this embodiment, the camera is a micro zoom camera that can rotate within a small range. Compared with the traditional gimbal high zoom camera, the device cost is greatly reduced. The plurality of cameras are fixed on the ceiling behind the ceiling according to the preset installation angle and are packaged, and are provided with a processor for receiving, storing and sending data instructions, forming a camera terminal. The array arrangement includes but is not limited to polygon matrix such as column, triangle and rectangle. Since each camera is responsible for different areas of shooting, the installation angles of the cameras are different. Compared with the traditional gimbal camera, the pre-installation of the camera greatly reduces the rotation, and the image focusing acquisition time is saved.

[0054] The camera terminal is suitable for image focusing acquisition of multiple targets at the same height below, such as test paper images on each student's desktop in the classroom, parts in the production workshop and the like. The actual space area is set to set multiple camera terminals to cover multiple image acquisition targets. Since the targets are all at the same height, the error is not large, so the focal length range is pre-set, so that the camera only rotates slightly when adjusting the focal length, shortens the focusing time and improves the efficiency of target image focusing acquisition.

[0055] S2: When the camera terminal receives the image acquisition instruction, each camera acquires the image of the target in the preset jurisdiction area.

[0056] In this embodiment, the image acquisition instruction is used to control all cameras in the camera terminal to acquire the target in the preset jurisdiction area at the same time or in sequence. The preset jurisdiction area is set to 3 in this embodiment, and the number of targets in the preset jurisdiction area can be set according to actual needs.

[0057] In one embodiment, the plurality of cameras are arranged in a column and arranged in a ceiling, an outer protective cover is arranged, and the cameras in the column are arranged in a column. The camera in the center of the column is vertically downward, and the remaining plurality of cameras in the column are raised by a preset angle from the center to both sides. Referring to Figure 2 As shown, in other embodiments, the plurality of cameras can also be arranged in different matrices, and the lifting angle of the camera is also set to be raised from the middle to the outside.

[0058] In one embodiment, step S2 comprises:

[0059] S21: When each camera corresponds to a preset jurisdictional area including two or more targets, each camera performs image focusing collection on the multiple targets in the respective preset jurisdictional area according to a preset rotation path.

[0060] In this embodiment, the number of targets in the preset jurisdictional area is 3, and the 3 targets are arranged along a direction perpendicular to the column in which the cameras are located, as shown in Figure 2 .

[0061] In an embodiment, referring to Figure 3 , step S21 is specifically:

[0062] S211: The camera performs image focusing collection on the first target in the current preset jurisdictional area based on a preset focal length range;

[0063] S212: Obtain rotation path information and send a rotation instruction to the camera based on the rotation path information, the rotation instruction including a rotation angle parameter and a rotation direction parameter;

[0064] S213: The camera rotates to face the second target based on the rotation angle parameter and the rotation direction parameter;

[0065] S214: The camera performs image focusing collection after matching the focal length parameter of the second target based on the focal length range;

[0066] In this embodiment, the focal length range includes a plurality of preset focal length parameters, each of which is used to match different target collection requirements, i.e., when the camera collects the first target, the focal length parameter at this time is adapted to the collection focal length of the first target, and when the camera rotates to the second target, the focal length parameter of the second target is matched.

[0067] The rotation direction parameter represents a specific rotation direction, including along the two sides perpendicular to the column in which the camera is located, and the rotation angle parameter represents the angle of the camera swing. The rotation direction is set according to the specific position of the target. If the same focal length parameter can be used between two adjacent targets, no rotation path is set between the two targets, i.e., the two targets are jointly designated as the Nth target.

[0068] The order of the first target, the second target, and the Nth target is self-defined. When the camera rotates to the target position to be collected, the focal length parameter corresponding to the target in the current order is matched.

[0069] In an embodiment, the following steps are further performed after step S214:

[0070] S215: when the camera completes image focusing collection of all targets in the preset jurisdiction, a rotation instruction is sent to the camera to make the camera return to the starting position of the preset rotation path;

[0071] S216: before the camera performs target image focusing collection next time, it is judged whether the current position information of the camera matches the first target in the preset jurisdiction;

[0072] S217: if the current position information does not match the first target, an angle adjustment instruction is sent to the camera terminal to make each camera rotate to face the first target in the respective preset jurisdiction, and match the focal length parameter of the first target.

[0073] In the embodiment, the starting position of the rotation path is the position when the camera faces the first target. The camera returns to the starting position immediately after completing image focusing collection of the target through the rotation instruction. Before the camera starts image focusing collection next time, the position of the camera is judged and calibrated again through the angle adjustment instruction. The position information includes angle information of the camera lifting and vector information of the direction in which the camera lifts. The corresponding angle information is calculated through the swing distance value of the camera after receiving the rotation instruction. The vector information of the camera lifting after receiving the rotation instruction is matched through the pre-stored direction information. The current angle information and vector information of the camera are identified and compared with the preset rotation angle and vector. When the initial angle information and vector information deviate from the preset rotation angle and vector, the angle adjustment instruction compensates and calibrates the deviated angle and vector.

[0074] In an embodiment, the following steps are further performed after step S214:

[0075] S215A: when the camera completes image focusing collection of all targets in the preset jurisdiction, the last target in the preset jurisdiction for which image focusing collection is performed is set as the first target for which image focusing collection is performed next time by the camera in the preset jurisdiction;

[0076] S216A: based on the re-set first target, the rotation path information is switched.

[0077] In the embodiment, in order to save the step of returning to the initial position after the camera completes the target image focusing collection each time, the number of camera rotations is reduced. Because after the camera completes the image focusing collection of all targets in the preset jurisdiction area each time, the last collected target is taken as the first target for the image focusing collection next time, that is, the last collected target of the camera in the preset jurisdiction area each time is the starting position for the next collection. Based on the continuous change of the starting position, the target image collection of different starting positions is realized by setting and switching a plurality of rotation path information.

[0078] Specifically, the first target in the preset jurisdiction area for the image focusing collection of the camera this time is taken as the second target for the image focusing collection in the preset jurisdiction area of the camera next time.

[0079] Based on the position information between the newly set first target and the newly set second target, the corresponding rotation path information is re-matched and switched, wherein the last collected target this time is taken as the first target for the next collection, and the first collected target this time is taken as the second target for the next collection, that is, only the rotation paths of the first two targets change each time the route is switched, and the rotation paths of the following targets remain unchanged. Therefore, when the rotation path changes, the corresponding rotation path information is matched from the pre-stored rotation path database by identifying the first target and the second target, that is, the switching of the rotation path is completed.

[0080] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0081] In an embodiment, a target focusing system based on a micro- zooming and rotatable camera array is provided, which corresponds to the target focusing method based on the micro- zooming and rotatable camera array in the above embodiment. The target focusing system based on the micro- zooming and rotatable camera array comprises:

[0082] A control module is configured to send an image collection instruction to a plurality of groups of camera terminals. Each group of the camera terminals comprises a plurality of cameras arranged in a ceiling. The plurality of cameras are arranged in an array according to a preset installation angle. Each camera is a micro- zooming camera and a focal length range is set in advance.

[0083] A collection module is configured to collect images of targets in a preset jurisdiction area of each camera when the camera terminal receives the image collection instruction.

[0084] Optionally, the collection module comprises:

[0085] The first acquisition sub-module is configured to acquire, by the camera, an image of a first target in a preset jurisdiction based on a preset focal length range;

[0086] The rotating sub-module is configured to acquire rotating path information and send a rotating instruction to the camera based on the rotating path information, wherein the rotating instruction comprises a rotating angle parameter and a rotating direction parameter;

[0087] The second acquisition sub-module is configured to rotate the camera to face a second target based on the rotating angle parameter and the rotating direction parameter;

[0088] The focal length matching sub-module is configured to acquire an image of the second target by the camera based on the focal length range after matching the focal length parameter of the second target.

[0089] Optionally, the method further comprises:

[0090] The homing sub-module is configured to send a rotating instruction to the camera to return the camera to a starting position of a preset rotating path when the camera completes image focusing acquisition of all targets in a preset jurisdiction;

[0091] The judging sub-module is configured to judge whether the current position information of the camera matches the first target in the preset jurisdiction before the camera performs image focusing acquisition of a target next time;

[0092] The adjusting sub-module is configured to send an angle adjusting instruction to the camera terminal to rotate each camera to face the first target in the respective preset jurisdiction and match the focal length parameter of the first target if the current position information does not match the first target.

[0093] Optionally, the method further comprises:

[0094] The position changing sub-module is configured to set a target that is lastly subjected to image focusing acquisition in the preset jurisdiction as a first target that is subjected to image focusing acquisition in the preset jurisdiction by the camera next time when the camera completes image focusing acquisition of all targets in the preset jurisdiction this time;

[0095] The switching sub-module is configured to switch the rotating path information based on the re-set first target.

[0096] Optionally, the switching sub-module comprises:

[0097] The first switching unit is configured to set the first target that is subjected to image focusing acquisition in the preset jurisdiction by the camera this time as a second target that is subjected to image focusing acquisition in the preset jurisdiction by the camera next time;

[0098] The second switching unit is configured to re-match and switch the corresponding rotating path information based on the position information between the re-set first target and the re-set second target.

[0099] The specific definitions of the target focusing system based on the micro- zooming and rotatable camera array can refer to the definitions of the target focusing method based on the micro-zooming and rotatable camera array in the above, which will not be repeated here. Each module in the target focusing system based on the micro-zooming and rotatable camera array described above can be realized by software, hardware and a combination thereof, in whole or in part. The above-mentioned modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0100] In one embodiment, a computer device, which can be a server, is provided, and an internal structure diagram of the computer device can be as shown in Figure 4 The computer device includes a processor, a memory, a network interface and a database connected through a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is configured to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement the target focusing method based on the micro-zooming and rotatable camera array.

[0101] In one embodiment, a computer device is provided, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the target focusing method based on the micro-zooming and rotatable camera array when executing the computer program.

[0102] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by the processor to implement the target focusing method based on the micro-zooming and rotatable camera array.

[0103] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0104] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0105] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A target focusing method based on a micro-zoom, rotatable camera array, characterized in that: Image acquisition commands are sent to several groups of camera terminals. Each group of camera terminals includes several cameras installed on the ceiling. The cameras are arranged in a preset installation angle array. Each camera is a micro-zoom camera and the focal length range is set in advance. When the camera terminal receives an image acquisition command, each camera focuses and acquires an image of the target within its preset jurisdiction area.

2. The target focusing method based on a micro-zoom, rotatable camera array according to claim 1, characterized in that, The plurality of cameras are arranged in an array according to a preset installation angle, including the plurality of cameras being arranged in a row and suspended from the ceiling, wherein when the cameras are installed, the camera located at the center of the row faces vertically downward, and the remaining plurality of cameras in the row are raised to the sides at a preset angle from the center.

3. The target focusing method based on a micro-zoom, rotatable camera array according to claim 1, characterized in that, Each camera performs image focusing and acquisition of targets within its respective preset jurisdiction area, and further includes: when each camera's preset jurisdiction area includes two or more targets, each camera performs image focusing and acquisition of multiple targets within its respective preset jurisdiction area one by one according to a preset rotation path.

4. The target focusing method based on a micro-zoom, rotatable camera array according to claim 3, characterized in that, The step of each camera sequentially focusing and acquiring images of multiple targets within its preset jurisdiction according to a preset rotation path includes: The camera focuses and captures an image of the first target within the current preset jurisdiction area based on a preset focal length range; Obtain rotation path information and send a rotation command to the camera based on the rotation path information. The rotation command includes rotation angle parameters and rotation direction parameters. The camera rotates to face the second target based on rotation angle and rotation direction parameters. Based on the focal length range, the camera performs image focusing and acquisition after matching the focal length parameters of the second target.

5. A target focusing method based on a micro-zoom, rotatable camera array according to claim 4, characterized in that, Following the step of image focusing and acquisition based on the focal length range and the camera matching the focal length parameters of the second target, the method further includes the following step: When the camera completes image focusing and acquisition of all targets within the preset jurisdiction area, a rotation command is sent to the camera to make the camera return to the starting position of the preset rotation path; Before the camera performs the next target image focusing acquisition, it determines whether the camera's current position information matches the first target within the preset jurisdiction area; If the current location information does not match the first target, an angle adjustment command is sent to the camera terminal to rotate each camera to face the first target within its respective preset jurisdiction area and match the focal length parameters of the first target.

6. The target focusing method based on a micro-zoom, rotatable camera array according to claim 3, characterized in that, After the step of image focusing and acquisition by the camera based on the focal length range and matching the focal length parameters of the second target, the following steps are included: When the camera completes image focusing and acquisition of all targets within the current preset jurisdiction area, the last target within the preset jurisdiction area to perform image focusing and acquisition is set as the first target within the next preset jurisdiction area of ​​the camera to perform image focusing and acquisition. Based on the reset first objective, the rotation path information is switched.

7. A target focusing method based on a micro-zoom, rotatable camera array according to claim 6, characterized in that, The step of switching the rotation path information based on the reset first target includes: The first target for image focusing and acquisition within the current preset jurisdiction area of ​​the camera is set as the second target for image focusing and acquisition within the next preset jurisdiction area of ​​the camera; Based on the positional information between the reset first target and the reset second target, the corresponding rotation path information is rematched and switched.

8. A target focusing system based on a micro-zoom, rotatable camera array, characterized in that, The control module is used to send image acquisition commands to several groups of camera terminals. Each group of camera terminals includes several cameras installed on the ceiling. The several cameras are arranged in an array according to a preset installation angle. Each camera is a micro-zoom camera and the focal length range is preset. The acquisition module is used so that when the camera terminal receives an image acquisition command, each camera performs image focusing and acquisition on the target within its respective preset jurisdiction area.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the target focusing method based on a micro-zoom, rotatable camera array as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the target focusing method based on a micro-zoom, rotatable camera array as described in any one of claims 1 to 7.

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