Multi-focal-length and multi-view monitoring system

Abstract

The utility model discloses a multi-focal-segment multi-view monitoring system, which comprises a main camera and an auxiliary camera, and the main camera and the auxiliary camera are arranged at an interval. Wherein the main camera comprises a constant shooting camera and at least two first snapshot cameras with different focal lengths; and the auxiliary camera comprises at least two second snapshot cameras with different focal segments. Based on this, the multi-focal-length and multi-view monitoring system designed by the utility model can shoot high-definition images under different focal lengths by using a plurality of snapshot cameras in the main camera and the auxiliary camera, so as to obtain richer depth information and details according to image information under different focal lengths, and cover a wider field of view and a wider depth range. Therefore, more comprehensive three-dimensional information can be provided when the point cloud is generated, and the method has good popularization prospect and application value.

Description

TECHNICAL FIELD

[0001] The utility model relates to monitoring technical field especially relates to a multi focal length multi -purpose monitoring system. BACKGROUND

[0002] It is known that point cloud is quite important in three-dimensional modeling, and point cloud is a representation method for describing the shape and characteristics of an object based on points in three-dimensional space. In the current monitoring field, the point cloud imaging systems used are roughly divided into two types:

[0003] Scheme 1: A single device captures point cloud data with visual sensors at different angles or different focal lengths.

[0004] Scheme 2: A binocular camera generates point cloud by shooting two images and calculating depth using parallax information. In the imaging plane coordinate system, the parallax can be calculated according to the horizontal placement of the binocular camera and the position relationship of the imaging plane coordinate system origin, and the point cloud data can be further obtained.

[0005] However, when the above two schemes are actually applied by the operator, the following disadvantages are still found:

[0006] In the above scheme 1, a single camera and multiple cameras with different focal lengths are used to obtain images at different angles, and then a depth estimation algorithm is used to infer depth information from these images to generate point cloud. This method does not rely on parallax information in stereo vision, but predicts depth by learning the relationship between image features and depth. The acquisition of depth information usually requires complex algorithms such as deep learning models to infer depth from a single or multiple images with different focal lengths, which in turn leads to the need for heavy computation of the device, greatly affecting the allocation of computing power.

[0007] In the above scheme 2, two cameras are used to shoot images at the same focal length, and then a stereo matching algorithm is used to calculate parallax and generate a depth map to form point cloud. In this method, point cloud data mainly depends on image matching of two cameras at the same focal length, and the depth information in some areas (such as large scenes or long-distance areas) is not rich or accurate enough.

[0008] In summary, how to simultaneously consider multi-focal length and binocular point cloud imaging is a technical problem that needs to be solved by those skilled in the art at present. Only using cameras with different angles or different focal lengths to obtain images, or only using binocular cameras to shoot images at the same focal length, both have adverse effects on subsequent point cloud imaging. UTILITY MODEL CONTENT

[0009] The utility model discloses a kind of multi-focus section multi-eye monitoring systems, to solve the point cloud imaging problem that current conventional monitoring system cannot simultaneously consider multi-focus section shooting image and multi-eye shooting image.

[0010] In order to solve the above technical problems, the utility model adopts the technical scheme that a kind of multi-focus section multi-eye monitoring system, it includes: main camera and vice camera, the main camera with the vice camera is spaced apart from each other arrangement;Wherein, the main camera includes normal shooting camera and at least two different focal lengths of first snapshot camera;The vice camera includes at least two different focal lengths of second snapshot camera.

[0011] In the above technical scheme of the utility model, for the point cloud imaging problem that current conventional monitoring system cannot simultaneously consider multi-focus section shooting image and multi-eye shooting image.The utility model discloses a kind of new multi-focus section multi-eye monitoring system, the main camera and vice camera in this multi-focus section multi-eye monitoring system can realize multi-eye image acquisition, i.e. utilize the multiple snapshot camera of itself and shoot high-definition image;Meanwhile, multiple snapshot cameras on each camera (i.e. main camera or vice camera) are also inconsistent between each other in focal length, i.e. it can utilize multiple snapshot cameras in main camera and / or vice camera and shoot high-definition image under different focal lengths, to simultaneously obtain multi-eye multi-focus section high-definition image.It needs to be explained that the focal length configuration of multiple snapshot cameras in the above main camera and vice camera is corresponding same.

[0012] Further, in the multi-focus section multi-eye monitoring system described in the utility model, it further includes laser ranging equipment, the laser ranging equipment is set on the main camera and / or the vice camera, and is used to measure the distance between the main camera and the vice camera.

[0013] In the above technical scheme of the utility model, in actual application, the external parameter calibration of the main camera and vice camera of multi-focus section multi-eye monitoring system is the key step of three-dimensional reconstruction and measurement, and the calibration of baseline is included in external parameter calibration, and the baseline refers to the physical distance between the main camera and the vice camera;Therefore, in actual application, laser ranging equipment can also be introduced in the multi-focus section multi-eye monitoring system, and the ranging equipment is set on the main camera and / or vice camera;So that the laser ranging equipment can provide more accurate baseline data for the multi-focus section multi-eye monitoring system dynamically, and make the installation of multi-focus section multi-eye monitoring system more flexible and reliable.

[0014] Of course, in actual application, in order to facilitate the installation of the above laser ranging equipment, the above main camera and vice camera can also be provided with a level, when the above laser ranging equipment is selected, the main camera and / or vice camera in the multi-focus section multi-eye monitoring system can be fixed after measuring by the laser ranging equipment in cooperation with the level, so as to improve the accuracy of three-dimensional point cloud data subsequently.

[0015] Further, in the multi-focus multi-view monitoring system, the main camera and / or the auxiliary camera comprises: an upper shell and a lower shell, the upper shell is arranged on the lower shell and forms a containing cavity for containing the camera together with the lower shell; wherein, a mainboard and a radiator are further arranged in the containing cavity, and the radiator is arranged corresponding to the high heat area on the mainboard.

[0016] Further, in the multi-focus multi-view monitoring system, the bottom of the lower shell is provided with a heat dissipation fin.

[0017] In the above technical scheme, considering that the main camera and the auxiliary camera of the multi-focus multi-view monitoring system are generally installed in an outdoor environment, in order to improve the working stability of the main camera and the auxiliary camera, and to prevent the camera from being damaged by the external environment, in actual application, the upper shell and the lower shell can be arranged, the upper shell is arranged on the lower shell to form a containing cavity, and the camera is contained in the containing cavity, thereby improving the safety and stability of the camera during work.

[0018] Meanwhile, in actual application, a mainboard can be arranged in the containing cavity, which can be fixedly installed in the containing cavity through a mainboard support to improve the firmness of installation; and considering that the camera and the mainboard will generate heat during actual application, and the space in the containing cavity is small and the heat dissipation is poor; therefore, a radiator is further arranged in the containing cavity, and the radiator is arranged corresponding to the high heat area on the mainboard, so as to dissipate heat by the radiator.

[0019] Correspondingly, in order to improve the heat dissipation effect, heat dissipation fins can be arranged at the bottom of the lower shell, which are arranged outside the lower shell to expand the contact area between the lower shell and the external environment, thereby increasing the heat dissipation area and accelerating the heat dissipation.

[0020] Further, in the multi-focus multi-view monitoring system, a camera support is further arranged in the containing cavity, and the normal shooting camera and the first snapshot camera, or the second snapshot camera are arranged on the camera support.

[0021] Further, in the multi-focus multi-view monitoring system, the front end of the lower shell is provided with a transparent protective plate and a windshield, and the windshield is rotatably arranged on the outer side of the transparent protective plate away from the containing cavity.

[0022] In the above technical scheme of the utility model, in order to protect the camera, avoid the lens of camera being scratched by external branches, stones and other hard objects when applying, after installing the camera in the accommodating cavity, the front end of lower shell can be provided with transparent protective plate, so as to block the hard objects in external environment from damaging the camera while not hindering the shooting of camera.

[0023] Correspondingly, although the camera is not damaged by external hard objects, but once in rainy and foggy weather, rainwater and fog will usually be attached to the outer side of transparent protective plate; at the same time, in dry weather, dust will also be attached to the outer side of transparent protective plate. Therefore, in order to ensure that the main camera and the auxiliary camera can still work normally in bad environment, a windshield is arranged at the front end of lower shell, so that the windshield is rotatably arranged on the outer side of transparent protective plate away from the accommodating cavity, and the rainwater, fog and dust on the outer side are wiped off by the windshield, so as not to hinder the normal shooting of camera.

[0024] Further, in the multi-focus multi-view monitoring system, the bottom contour of the transparent protective plate is V-shaped.

[0025] In the above technical scheme of the utility model, the bottom contour of the transparent protective plate is V-shaped, in order to ensure that after the transparent protective plate is installed on the lower shell, the water droplets on the transparent protective plate can quickly flow along the V-shaped chamfer at the bottom of the transparent protective plate after the windshield wipes off the water droplets on the transparent protective plate in heavy rain environment, so as to quickly collect and discharge the accumulated water on the transparent protective plate.

[0026] Further, in the multi-focus multi-view monitoring system, the front end of the lower shell is further provided with a sun shield, the sun shield is arranged on the left and right sides of the transparent protective plate, and the width dimension of the sun shield gradually decreases from the top end to the bottom end in the vertical height direction.

[0027] In the above technical scheme of the utility model, the sun shield is arranged to be wide at the top and narrow at the bottom, so as to effectively shade without affecting the field of view of the snapshot camera in the main camera or the auxiliary camera, which can avoid the influence of sunlight on the camera lens, and also takes into account the shooting field of view.

[0028] Further, in the multi-focus multi-view monitoring system, the main camera further comprises a downward-looking camera and a rear-view camera, the downward-looking camera is rotatably arranged at the bottom end of the main camera, and the rear-view camera is rotatably arranged at the rear end of the main camera, so that the downward-looking camera and the rear-view camera can rotate left and right and pitch.

[0029] In order to increase the monitoring field of view, the main camera in the multi-focus multi-view monitoring system can be further provided with a downward-looking camera and a rear-looking camera, and the downward-looking camera and the rear-looking camera can be controlled to rotate left and right and pitch. In actual application, the multiple cameras provided on the main camera can realize omnidirectional monitoring, the monitoring field of view is wide, and the applicability of the multi-focus multi-view monitoring system can be greatly improved, so as to be applied in different scenes and meet personalized needs of users.

[0030] Further, the main camera and the auxiliary camera are further provided with an antenna bin, and an antenna communication module is arranged in the antenna bin, and the antenna communication module is used for wireless communication connection with a remote server.

[0031] In actual application, the main camera and the auxiliary camera can be specifically controlled to be provided with the antenna communication module, so as to establish a wireless communication connection with the remote server by using the antenna communication module, so that the image data is sent to the remote server for processing and three-dimensional reconstruction.

[0032] The multi-focus multi-view monitoring system has the advantages that the main camera and the auxiliary camera in the multi-focus multi-view monitoring system can realize multi-view image acquisition, that is, the multiple snapshot cameras are used to shoot high-definition images; meanwhile, the focal lengths of the snapshot cameras provided on the main camera or the auxiliary camera are also inconsistent, the multiple snapshot cameras in the main camera and the auxiliary camera can be used to shoot high-definition images under different focal lengths, so that multi-view multi-focus high-definition images are obtained, and the images can be transmitted to the remote server, the remote server can obtain more rich depth information and details by combining the image information under different focal lengths, and a wider field of view and depth range are covered, so that more comprehensive three-dimensional information can be provided when the point cloud is generated, the multi-focus multi-view monitoring system can be effectively applied to complex scene processing and scenes requiring high-resolution details, and the multi-focus multi-view monitoring system has good popularization prospect and application value. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is an installation schematic view of the multi-focus multi-view monitoring system in an embodiment of the utility model.

[0034] Figure 2 FIG. 3 is a front view of the installation structure of the main camera in the multi-focus multi-view monitoring system in an embodiment of the utility model.

[0035] Figure 3 FIG. 4 is an A-A sectional view of the main camera shown in FIG. 3. Figure 2

[0036] ​Figure 4 Structure schematic view of the main camera of the multi-focus-section multi-view monitoring system of the utility model under one implementation in one view angle.

[0037] Figure 5 Structure schematic view of the main camera of the multi-focus-section multi-view monitoring system of the utility model under one implementation in another view angle.

[0038] Figure 6 Structure schematic view of the camera support of the main camera mounting the normal shooting camera and the first snapshot camera is shown schematically.

[0039] Label explanation:

[0040] 1, main camera; 101, normal shooting camera; 102, first snapshot camera; 103, downward-looking camera; 104, rear-view camera;

[0041] 2, secondary camera; 201, second snapshot camera;

[0042] 3, upper shell;

[0043] 4, lower shell; 401, heat dissipation fin;

[0044] 5, antenna compartment;

[0045] 6, level;

[0046] 7, camera support;

[0047] 8, mainboard support;

[0048] 9, windshield wiper;

[0049] 10, transparent protective plate;

[0050] 11, sun visor;

[0051] 12, equipment support;

[0052] 13, universal joint;

[0053] 14, microclimate module. DETAILED DESCRIPTION

[0054] To explain the technical content, the purpose and the effect of the utility model in detail, the following will be explained in combination with the embodiment and the drawings.

[0055] Referring to Figures 1-6As shown in the embodiment, the utility model discloses a new multi-focus section multi -purpose monitoring system, it includes: main camera 1 and vice camera 2, in the installation process, above -mentioned main camera 1 and vice camera 2 are spaced apart from each other arrangement, main camera 1, vice camera 2 can be fixed on the external installation position through equipment support 12 specifically, and equipment support 12 still is provided with universal joint 13, in order to adjust the shooting direction of main camera 1, vice camera 2.

[0056] In order to ensure that the multi-focus section multi -purpose monitoring system of the utility model can realize the fusion of multi-focus section and multi -purpose structure, in the design, its main camera 1 can specifically include normal camera 101 and at least two different focal length's first snapshot camera 102, its vice camera 2 includes at least two different focal length's second snapshot camera 201, and the focal length of the second snapshot camera 201 is controlled to be different from the focal length of the first snapshot camera 102.

[0057] For example, as shown in Figure 5 and Figure 6 As shown in the embodiment, the main camera 1 of the multi-focus section multi -purpose monitoring system specifically provides two normal cameras 101 and two different focal length's first snapshot cameras 102, and the vice camera 2 specifically includes two different focal length's second snapshot cameras 201. Among them, the normal camera 101 arranged on the main camera 1 has low power consumption, and the image clarity of the normal camera 101 is not high, but the normal camera 101 can work for 24 hours to perform 24-hour monitoring, and when an abnormal trigger condition is monitored and photographed, the first snapshot camera 102 of the main camera 1 and / or the second snapshot camera 201 of the vice camera 2 are triggered to perform high-definition snapshot to obtain a high-definition snapshot image.

[0058] Based on this setting, the main camera 1 and the vice camera 2 in the multi-focus section multi -purpose monitoring system can realize multi -purpose image acquisition, that is, use their own multiple snapshot cameras to shoot high-definition images; At the same time, the focal length of the multiple first snapshot cameras 102 or the multiple second snapshot cameras 201 arranged on the main camera 1 or the vice camera 2 is also inconsistent, that is, it can shoot high-definition images under different focal lengths to obtain high-definition images of multi -purpose multi -focus section; In the installation setting, the above-mentioned main camera 1 and vice camera 2 are spaced apart from each other, and the two can be respectively communicated with a remote server to facilitate real-time transmission of the shot high-definition images to the above-mentioned remote server, and through the remote server, more rich depth information and details can be obtained by combining image information under different focal lengths, and a wider field of view and depth range can be covered, so that more comprehensive three-dimensional information can be provided when generating point cloud, which is convenient for subsequent three-dimensional reconstruction.

[0059] Of course, it should be noted that the image data transmitted to the remote server will also be stored to the database for subsequent users to retrieve the required image data from the database according to specific needs.

[0060] Furthermore, it is important to note that in practical applications of this multi-focal length multi-view monitoring system, the extrinsic parameter calibration of the main camera 1 and the secondary camera 2 is a crucial step in 3D reconstruction and measurement. Extrinsic parameter calibration includes baseline calibration, where the baseline refers to the physical distance between the main camera 1 and the secondary camera 2 (e.g., ...). Figure 1 The distance X is shown.

[0061] Therefore, in practical applications, a laser ranging device can be introduced into the multi-focal length multi-view monitoring system. The laser ranging device, as an optional accessory, can be specifically set on the main camera 1 and / or the secondary camera 2. The laser ranging device can then measure the distance between the main camera 1 and the secondary camera 2, thereby providing more accurate baseline data for the multi-focal length multi-view monitoring system and making the installation process of the multi-focal length multi-view monitoring system more flexible and reliable.

[0062] Of course, such as Figure 5 As shown, in practical applications, to facilitate the installation of the aforementioned laser ranging device, a level 6 can also be installed on the main camera 1 and the secondary camera 2. The level 6 can be a common bubble level 6, which is installed on the housing of the main camera 1 / secondary camera 2 so that the user can observe the horizontal state. When the aforementioned laser ranging device is required, the laser ranging device can be used in conjunction with the level 6 to perform the measurement before fixing the main camera 1 and / or the secondary camera 2 in the multi-focal length multi-view monitoring system, so as to improve the accuracy of the three-dimensional point cloud data in the future.

[0063] Furthermore, in order to effectively expand the functionality of this multi-focal length, multi-view monitoring system, such as... Figure 3 As shown in this embodiment, a micro-meteorological module 14 can also be set on the main camera 1 of the multi-focal length multi-view monitoring system to monitor the meteorological environment, thereby effectively sending the monitored meteorological data to a remote server, so that operators can obtain meteorological information.

[0064] In addition, see further Figures 1-5 As shown in this embodiment, considering that the main camera 1 and the secondary camera 2 of the multi-focal length multi-view monitoring system are generally installed in an outdoor environment, in order to improve the working stability of the main camera 1 and the secondary camera 2 and prevent the camera from being damaged by the external environment, in actual application, the main camera 1 and the secondary camera 2 are both configured to include: an upper housing 3 and a lower housing 4; the upper housing 3 can be correspondingly installed and fixedly covered on the lower housing 4, and together with the lower housing 4, they form a receiving cavity, so as to improve the safety and stability of the camera during operation by using the receiving cavity to correspondingly install and house the camera.

[0065] like Figure 3 and Figure 6As shown, when actually installing the camera, a camera support 7 is arranged in the accommodating cavity formed by the upper shell 3 and the lower shell 4, and the camera support 7 is capable of corresponding installation of two normal shooting cameras 101 and two first snapshot cameras 102 required by the main camera 1, or corresponding installation of two second snapshot cameras 201 required by the auxiliary camera 2. When installing the camera on the camera support 7, the four cameras of the main camera 1 or the two cameras of the auxiliary camera 2 need to be calibrated before being fixed.

[0066] Correspondingly, as Figure 3 shown, in actual application, in order to facilitate the control of the main camera 1 or the auxiliary camera 2, a mainboard is arranged in the accommodating cavity, which can be fixed and installed in the accommodating cavity through a mainboard support 8 to improve the firmness of the installation; and considering that the camera and the mainboard will generate heat in actual application, and the space in the accommodating cavity is small and the heat dissipation is poor; therefore, a heat sink is also arranged in the accommodating cavity, and the heat sink is arranged corresponding to the high-heat area on the mainboard to dissipate heat by the heat sink; at the same time, the connection of the mainboard support 8 and the lower shell 4 can also lead part of the heat of the mainboard out.

[0067] In order to improve the heat dissipation effect, as Figure 4 shown, in this embodiment, heat dissipation fins 401 are also arranged at the bottom of the lower shell 4 of the main camera 1 and the auxiliary camera 2, which are arranged outside the lower shell 4 to expand the contact area between the lower shell 4 and the external environment, increase the heat dissipation area, and accelerate the heat dissipation.

[0068] In addition, as Figure 5 shown, in this embodiment, in order to protect the camera and avoid the lens of the camera being scratched by hard objects such as branches and stones in the external environment during application, after installing the camera in the accommodating cavity, a transparent protective plate 10 can be arranged at the front end of the lower shell 4 to block the damage of hard objects in the external environment to the camera while not hindering the shooting of the camera.

[0069] In addition, although the external hard objects will not damage the camera, rainwater and fog will usually be attached to the outer side of the transparent protective plate 10 in rainy and foggy weather; at the same time, dust will also be attached to the outer side of the transparent protective plate 10 in dry weather. Therefore, as Figure 5 shown, in this embodiment, in order to ensure that the main camera 1 and the auxiliary camera 2 can still work normally in harsh environments, a windshield wiper 9 is arranged at the front end of the lower shell 4, so that the windshield wiper 9 is rotatably arranged on the outer side of the transparent protective plate 10 away from the accommodating cavity, and the rainwater, fog and dust on the outer side are wiped off by the windshield wiper 9, so as not to hinder the normal shooting of the camera.

[0070] And, as Figure 5 As shown, in this embodiment, the bottom outer contour of the transparent protective plate 10 installed on the main camera 1 and the secondary camera 2 of the multi-focal length multi-view monitoring system is V-shaped. The reason for setting the bottom outer contour of the transparent protective plate 10 in a V-shape is to ensure that after the transparent protective plate 10 is installed on the lower housing 4, in a rainy environment, after the wiper 9 wipes away the water droplets on the transparent protective plate 10, the water droplets can quickly flow along the V-shaped chamfer at the bottom of the transparent protective plate 10, thereby quickly collecting and draining the water accumulated on the transparent protective plate 10.

[0071] Of course, in some other embodiments, in order to make the appearance of the main camera 1 and the secondary camera 2 more aesthetically pleasing and the function more reliable, the wiper 9 structure may not be provided. Instead, a heating element may be provided below the transparent protective plate 10 at the front of the main camera 1 and the secondary camera 2. The ambient temperature may be detected by a temperature sensor near the transparent protective plate 10, and it may be determined whether to trigger the heating element to heat the transparent protective plate 10. Of course, in practical applications, temperature and humidity data may also be obtained through the micro-meteorological module 14 to achieve comprehensive triggering.

[0072] It should be noted that, as Figure 5 As shown, in this embodiment, sunshades 11 are provided on both the main camera 1 and the secondary camera 2. The sunshades 11 are located on the left and right sides of the transparent protective plate 10, and the width of the sunshades 11 gradually decreases from the top to the bottom in the vertical direction. That is, the sunshades 11 are wider at the top and narrower at the bottom, so as to effectively block the sun without affecting the field of view of the capture camera in the main camera 1 or the secondary camera 2. It can avoid the influence of sunlight on the camera lens, while taking into account the shooting field of view.

[0073] Accordingly, see further Figure 5 As can be seen, considering the diverse needs in practical applications, in order to increase the monitoring field of view, the main camera 1 in this multi-focal length multi-view monitoring system can also be equipped with a downward-viewing camera 103 and a rear-viewing camera 104. The downward-viewing camera 103 is rotatably mounted at the bottom of the main camera 1, and the rear-viewing camera 104 is rotatably mounted at the rear end of the main camera 1, so that the downward-viewing camera 103 and the rear-viewing camera 104 can rotate left and right and tilt.

[0074] Furthermore, the multiple cameras mounted on the main camera 1 enable all-around monitoring with a wide field of view, greatly enhancing the applicability of the multi-focal length and multi-view monitoring system, making it suitable for application in different scenarios and meeting users' personalized needs.

[0075] Meanwhile, considering that the cost of wired communication is high, wiring is relatively complex, the labor cost is high and the later maintenance is inconvenient, the tail end of the main camera 1 and the auxiliary camera 2 is further provided with an antenna bin 5 in the multi-focus multi-view monitoring system, the antenna bin 5 is provided with an antenna communication module, and the antenna communication module is wirelessly connected with a remote server, so that image data is sent to the remote server for processing and three-dimensional reconstruction.

[0076] As can be known from the above description, the main camera 1 and the auxiliary camera 2 in the multi-focus multi-view monitoring system can realize multi-view image acquisition, that is, a plurality of snapshot cameras are used to shoot high-definition images; meanwhile, the focal lengths of the snapshot cameras arranged on the main camera 1 or the auxiliary camera 2 are also inconsistent, which can realize shooting of high-definition images under different focal lengths by using the plurality of snapshot cameras in the main camera 1 and the auxiliary camera 2, so as to obtain more abundant depth information and details by combining image information under different focal lengths through the remote server, and cover a wider field of view and depth range, thereby providing more comprehensive three-dimensional information when generating point clouds, and having good popularization prospect and application value.

[0077] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A multi-focal segment multi-view surveillance system, characterized in that, The application relates to a camera device. The camera device comprises a main camera and a sub-camera, wherein the main camera and the sub-camera are arranged at a distance from each other; the main camera comprises a normal camera and at least two first snapshot cameras with different focal lengths; and the sub-camera comprises at least two second snapshot cameras with different focal lengths.

2. The multi-focal segment multi-view surveillance system of claim 1, wherein, The camera device further comprises a laser ranging device arranged on the main camera and / or the sub-camera, and used for measuring the distance between the main camera and the sub-camera.

3. The multi-focal segment multi-view surveillance system of claim 1, wherein, The main camera and / or the sub-camera comprise an upper shell and a lower shell, the upper shell is arranged on the lower shell and forms a receiving cavity for accommodating the cameras together with the lower shell; the receiving cavity is further provided with a main board and a heat sink corresponding to a high heat area on the main board.

4. The multi-focal segment multi-view surveillance system of claim 3, wherein, The bottom of the lower shell is provided with a heat dissipation fin.

5. The multi-focal segment multi-view surveillance system of claim 3, wherein, The receiving cavity is further provided with a camera support, and the normal camera and the first snapshot cameras or the second snapshot cameras are arranged on the camera support.

6. The multi-focal segment multi-view surveillance system of claim 3, wherein, The front end of the lower shell is provided with a transparent protective plate and a windshield wiper, and the windshield wiper is rotatably arranged on the outer side of the transparent protective plate away from the receiving cavity.

7. The multi-focal segment multi-view surveillance system of claim 6, wherein, The bottom contour of the transparent protective plate is arranged in a V shape.

8. The multi-focal segment multi-view surveillance system of claim 6, wherein, The front end of the lower shell is further provided with sunshields arranged on the left and right sides of the transparent protective plate, and the width of the sunshields gradually decreases from the top end to the bottom end in the vertical height direction.

9. The multi-focal segment multi-view surveillance system of claim 1, wherein, The main camera further comprises a downward-looking camera and a rear-looking camera, the downward-looking camera is rotatably arranged at the bottom end of the main camera, and the rear-looking camera is rotatably arranged at the rear end of the main camera, so that the downward-looking camera and the rear-looking camera can rotate left and right and pitch.

10. The multi-focal segment multi-view surveillance system of claim 1, wherein, The main camera and the sub-camera are further provided with an antenna compartment, and the antenna compartment is provided with an antenna communication module for wireless communication connection with a remote server.

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