A multi-view camera and multi-channel video signal processing method and module

Abstract

The present invention discloses a multi-view camera, including a top seat installed on the ceiling, a transparent ball cover is provided below the top seat, a main control board connected to a bus is provided inside the top seat, and a plurality of interfaces connected to the main control board are provided on the bottom surface of the top seat; a plurality of cameras are connected to the bottom surface of the top seat, and the plurality of cameras are evenly arranged along the circumference and located on the same horizontal plane, and the cameras are connected with connectors that match the interfaces; an intelligent sensing component connected to the main control board is also provided on the top seat, and the intelligent sensing component is used to determine whether the camera is in a working range, and the main control board is used to change the working state of the interface connected to the camera according to the determination result of the intelligent sensing component. The present invention utilizes multiple independent built-in high-definition video surveillance cameras, and can realize the collection of images from multiple directions at one point installation at the same time, and transmit them to the display device through a bus after transcoding, and the wiring is greatly simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of image acquisition, and in particular to a multi-viewing angle camera and a multi-channel video signal processing method and module. Background Art

[0002] In many cases, cameras are deployed to collect images in order to improve the security level. However, because the current camera installation position is relatively fixed and the camera itself has a limited rotation angle, in order to fully cover the target area and reduce the existence of blind spots, it is often necessary to deploy a large number of cameras in different directions and angles in the area. Correspondingly, a large number of cables need to be laid to connect them to the server. When a camera fails, the image collection in the area will be affected before the fault is repaired.

[0003] In order to reduce the number of cameras and reduce the cost of installation and subsequent maintenance, fisheye cameras and cameras with convex mirrors have appeared. Fisheye cameras can independently achieve large-scale monitoring without blind spots, but because the focal length of the fisheye lens is very short, the effective shooting distance is relatively short, resulting in unclear and deformed images at the edge of the camera, which need to be compensated by algorithms. The clarity and accuracy need to be improved. The principle of a camera with a convex mirror is similar to that of a human eye: when an object is placed outside the focus of the convex mirror, there will be an inverted real image on the other side of the mirror. The smaller the object distance, the larger the image distance and the larger the real image. When the object is placed within the focus, there will be an upright and enlarged virtual image on the same side of the convex mirror. The larger the object distance, the larger the image distance and the larger the virtual image. No image will be formed when the object coincides with the focus. When it is at 2 times the focal length, an inverted real image of the same size will be formed. The convex lens converges light to form a real image. The image distance is smaller than the object distance, and the object distance is greater than 2 times the focal length. However, it still has the problem of fisheye lens: after the image is collected, a series of algorithms need to be compensated to obtain a normal image, and it still has the defect of low accuracy. Summary of the invention

[0004] In order to solve the above shortcomings in the prior art, the present invention provides a multi-view camera, and the specific solution is as follows:

[0005] It comprises a top seat installed on the ceiling, a transparent ball cover is provided under the top seat, a main control board connected to a bus is provided inside the top seat, and a plurality of interfaces connected to the main control board are provided on the bottom surface of the top seat; a plurality of cameras are connected to the bottom surface of the top seat, the plurality of cameras are evenly arranged along the circumference and are located on the same horizontal plane, and the cameras are connected to connectors that cooperate with the interfaces; an intelligent sensing component connected to the main control board is also provided on the top seat, the intelligent sensing component is used to determine whether the camera is in a working range, and the main control board is used to change the working state of the interface connected to the camera according to the determination result of the intelligent sensing component.

[0006] Furthermore, the intelligent sensing component includes a plurality of laser ranging sensors arranged on the side walls of the top seat, and the positions and directions of the laser ranging sensors correspond to the cameras.

[0007] Furthermore, a vertical rotating shaft is provided on the bottom surface of the top seat through a bearing, and a horizontally arranged connecting plate is fixedly connected to the lower end of the rotating shaft, the camera is connected to the bottom surface of the connecting plate, and the joint is provided on the top surface of the connecting plate and corresponds to the interface position; a first driving component for driving the rotating shaft to rotate and a second driving component for driving the rotating shaft to move in a vertical direction are also provided on the top seat.

[0008] Further, the first driving assembly includes a driving motor disposed in the top seat, a driven gear is sleeved on the rotating shaft, an output shaft of the driving motor is sleeved with a driving gear meshing with the driven gear, and a thickness of the driven gear is smaller than a thickness of the driving gear;

[0009] The second driving assembly includes a linear motor disposed in the top seat, the output end of the linear motor is connected to the rotating shaft through a bearing, the output direction of the linear motor is arranged along the axial direction of the rotating shaft, and the stroke of the linear motor is smaller than the thickness of the driving gear.

[0010] Furthermore, the rotating shaft is a hollow shaft.

[0011] A method for processing multi-channel video signals based on the above-mentioned multi-view camera includes a transmission method, which specifically includes the following steps:

[0012] After the camera is connected to the interface, it starts working, collects image information of the corresponding working area and sends it to the main control board through the interface;

[0013] The main control board converts the received image information into digital information, inserts a mark representing the interface before the digital information, and then transmits the digital information with the mark to the display device through the bus;

[0014] The display device includes a device for converting digital information into image information and a plurality of display screens, and projects the image information received from different interfaces onto different display screens according to different marks.

[0015] Furthermore, a judgment method is also included, which specifically includes the following steps:

[0016] Use a laser ranging sensor to measure the distance L between the sensor and the obstacle in front of it;

[0017] If L is greater than or equal to the preset value a, it means that the camera corresponding to the position of the laser ranging sensor is in the working range, and the interface connected to the camera is in working state;

[0018] If L is less than the preset value a, it means that the camera corresponding to the position of the laser ranging sensor is not in the working range, and the interface connected to the camera is in a non-working state.

[0019] Furthermore, a motion compensation method is also included, which specifically includes the following steps:

[0020] When an interface corresponding to a certain working area on the top seat does not receive image information, it means that the camera corresponding to the working area may be faulty;

[0021] The second driving component is used to disconnect all cameras, and then the first driving component is used to control the connecting plate to rotate a certain angle so that the moving joint of an adjacent camera is aligned with the interface, and then the second driving component is used again to connect all cameras.

[0022] Furthermore, an alarm method is also included, which specifically includes the following steps:

[0023] If there are still interfaces that do not receive image information after motion compensation is performed, it means that the faulty camera may have moved to another working range;

[0024] Repeat motion compensation several times until all interfaces in working state can receive image information normally;

[0025] When the compensation movement is performed n times (n=number of cameras-1), if there are still interfaces that have not received image information, a warning message is sent to the warning device through the main control board.

[0026] A multi-channel video signal processing module using the multi-channel video signal processing method, the processing module is mounted on the main control board, and the processing module includes:

[0027] A receiving module is used to receive the measurement results sent by the laser ranging sensor and send the measurement results to the comparison module;

[0028] A comparison module, used for comparing the measurement result sent by the receiving module with a preset value, and sending the comparison result to the first control module;

[0029] A first control module, used for connecting an interface where the measurement result is greater than a preset value;

[0030] An identification module, used for identifying a preset number of a certain interface, and sending the identified preset number to the marking module;

[0031] A marking module, used for inserting a mark representing an interface before image information received by a certain interface;

[0032] A conversion module, used for converting the marked image information into the marked digital information;

[0033] A feedback module is used to detect whether the interface has received the image information and send the detection result to the compensation module;

[0034] A compensation module, when the detection result shows that there is a camera that has not received image information, is used to disconnect all cameras and reconnect all cameras after rotating them to a certain angle;

[0035] The counting module is used to count the number of times the compensation module runs in a working cycle. When the number of times the compensation module runs is equal to the number of cameras minus one, a working instruction is sent to the alarm module.

[0036] The alarm module sends out an alarm signal after receiving a work instruction.

[0037] The beneficial effects of the present invention are:

[0038] The multi-view camera proposed in the present invention utilizes multiple built-in independent high-definition video surveillance cameras to realize the collection of images in multiple directions at the same time with one installation point, and the collected images are clear; in addition, the image information collected by the corresponding camera can be marked according to different connectors, and after transcoding, it can be transmitted to the display device through a bus, which greatly simplifies the wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram I of the present invention (main viewing angle),

[0040] Figure 2 This is a structural schematic diagram II of the present invention (looking up),

[0041] Figure 3 This is a schematic diagram of an application scenario of the present invention.

[0042] Figure 4 This is another application scenario schematic diagram of the present invention.

[0043] Figure 5 is a schematic diagram of the steps of the multi-channel video signal processing method of the present invention,

[0044] Figure 6 is a schematic structural diagram of another embodiment of the present invention,

[0045] Figure 7 for Figure 6 A magnified view of the structure at A in the middle.

[0046] Figure 8 Schematic diagram of the steps of motion compensation in the multi-channel video signal processing method of the present invention,

[0047] Fig. 9 It is a connection diagram of the processing module of the present invention.

[0048] Serial numbers and names of the accompanying drawings: 1. Ceiling, 2. Top seat, 21. Interface, 22. Rotating axis, 23. Connecting plate, 24. Driven gear, 3. Transparent ball cover, 4. Main control board, 5. Camera, 51. Connector, 6. Intelligent sensing component, 7. First drive component, 71. Drive motor, 72. Drive gear, 8. Second drive component, 81. Linear motor. DETAILED DESCRIPTION

[0049] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following embodiments are given by way of example and detailed description with reference to the accompanying drawings.

[0050] See also Figure 1 and Figure 2 The present invention discloses a multi-view camera, comprising a top seat 2 installed on a ceiling 1, a transparent ball cover 3 is provided below the top seat 2, a main control board 4 connected to a bus is provided inside the top seat 2, and four interfaces 21 connected to the main control board 4 are provided on the bottom surface of the top seat 2; four cameras 5 are connected to the bottom surface of the top seat 2, and the four cameras 5 are evenly arranged along the circumference and located on the same horizontal plane, and the cameras 5 are connected to connectors 51 that cooperate with the interfaces 21; an intelligent sensing component 6 connected to the main control board 4 is also provided on the top seat 2, and the intelligent sensing component 6 is used to determine whether the camera 5 is in a working range, and the main control board 4 is used to change the working state of the interface 21 connected to the camera 5 according to the determination result of the intelligent sensing component 6.

[0051] The present invention is particularly suitable for an environment with multiple intersecting corridors. The present invention is installed at the intersection of multiple corridors, and an intelligent sensing component is used to detect which cameras under the base are in a working area (the cameras face the corridor) and which are not in a working area (the cameras face the wall). Then, the main control board controls some interfaces (interfaces connected to the cameras in the working area) to be in a working state according to the detection results, ensuring that the cameras in the working area are powered on and can transmit data; and those cameras that are not in the working area are in a power-off and shutdown state because the interfaces connected to them are not working.

[0052] The intelligent sensing component 6 includes four laser distance measuring sensors arranged on the side wall of the top base 2, and the position and orientation of the laser distance measuring sensors correspond to the camera 5. The intelligent sensing component of the present application is a laser distance measuring sensor, which uses a laser diode to emit laser pulses directly in front, and then uses a sensor receiver to receive part of the scattered light, amplifies it, records and processes the time from the light pulse being emitted to the return being received, and can measure the distance between the target and the sensor.

[0053] The laser ranging sensor can accurately measure the distance between the sensor and the obstacle in front (walls, doors, windows, etc.). When the distance is greater than the preset value, it indicates that there is a corridor in front of the sensor, and the camera corresponding to the sensor needs to start working to collect images; when the distance is less than the preset value, it indicates that there is no corridor in front of the sensor, and the camera corresponding to the sensor does not need to work.

[0054] For example: four cameras are A, B, C and D in counterclockwise order. When the present invention is installed in Figure 3 In an environment, there is a corridor in front of A, B, and C, and a wall in front of D. Therefore, only A, B, and C need to work normally, and D does not need to work. Figure 4 In this environment, there is a corridor in front of A and B, and a wall in front of C and D, so only A and B need to work normally, and C and D do not need to work.

[0055] Reference Figure 5 A method for processing multi-channel video signals based on the multi-view camera mentioned above includes a transmission method, which specifically includes the following steps:

[0056] The main control board converts the received image information into digital information, inserts a mark representing the interface before the digital information, and then transmits the digital information with the mark to the display device through the bus;

[0057] The display device includes a device for converting digital information into image information and a plurality of display screens, and projects the image information received from different interfaces onto different display screens according to different marks.

[0058] Before the transmission method is carried out, a determination method can be used to first determine the effective joints that need to be worked on, which includes the following steps:

[0059] Use a laser ranging sensor to measure the distance L between the sensor and the obstacle in front of it;

[0060] If L is greater than or equal to the preset value a, it means that the camera corresponding to the position of the laser ranging sensor is in the working range, and the interface connected to the camera is in working state;

[0061] If L is less than the preset value a, it means that the camera corresponding to the position of the laser ranging sensor is not in the working range, and the interface connected to the camera is in a non-working state;

[0062] After the camera is connected to the interface in the on state, it starts working, collects image information of the corresponding working area and sends it to the main control board through the interface

[0063] The multi-channel video signal processing method of this embodiment can automatically determine the effective interface according to the actual working environment, and the camera connected to the effective interface starts to work normally; the collected image information is inserted into the corresponding mark according to the number of the interface it is input to, and the image information of multiple cameras is transmitted to the display device through a bus after transcoding. After decoding, the display device projects the image information input from different interfaces onto the corresponding display screen according to the mark.

[0064] like Figure 6 In another embodiment of the present application, a vertical rotating shaft 22 is provided on the bottom surface of the top seat 2 through a bearing, and a horizontally arranged connecting plate 23 is fixedly connected to the lower end of the rotating shaft 22. The camera 5 is connected to the bottom surface of the connecting plate 23, and the joint 51 is provided on the top surface of the connecting plate 23 and corresponds to the position of the interface 21; the top seat 2 is also provided with a first driving component 7 for driving the rotating shaft 22 to rotate and a second driving component 8 for driving the rotating shaft 22 to move in a vertical direction.

[0065] like Figure 7 The first driving assembly 7 includes a driving motor 71 disposed in the top seat 2, a driven gear 24 is sleeved on the rotating shaft 22, and a driving gear 72 meshing with the driven gear 24 is sleeved on the output shaft of the driving motor 71, and the thickness of the driven gear 24 is smaller than that of the driving gear 72. When the driving motor starts to work, the rotating shaft rotates forward or reversely around itself through the transmission of the driving gear and the driven gear. The driving motor is a stepping motor, which is convenient for controlling its rotation angle, thereby controlling the rotation angle of the camera below the connecting plate.

[0066] The second drive assembly 8 includes a linear motor 81 disposed in the top seat 2. The output end of the linear motor 81 is fixedly connected to the rotating shaft through a bearing, and the output direction of the linear motor 81 is arranged along the axial direction of the rotating shaft 22. When the linear motor moves vertically downward with the rotating shaft, the connecting plate and the camera under the connecting plate also move vertically downward, and the connector on the connecting plate is disengaged from the interface on the top seat; when the linear motor moves vertically upward with the rotating shaft, the connecting plate and the camera under the connecting plate also move vertically upward, and the connector on the connecting plate is inserted into the interface on the top seat. The stroke of the linear motor 81 is smaller than the thickness of the driving gear 72, ensuring that when the connection state of the connector and the interface is changed, the driving relationship between the driving gear and the driven gear will not be affected.

[0067] The rotating shaft 22 is a hollow shaft for storing various cables to facilitate wiring.

[0068] The multi-channel video signal processing method of this embodiment also includes a motion compensation method and an alarm method, which specifically includes the following steps:

[0069] When an interface corresponding to a certain working area on the top seat does not receive image information, it means that the camera corresponding to the working area may be faulty;

[0070] The second driving component is used to disconnect all cameras, and then the first driving component is used to control the connection plate to rotate a certain angle so that the joint of an adjacent camera is aligned with the interface, and then the second driving component is used to connect all cameras again. The above three actions constitute a complete motion compensation;

[0071] If there are still interfaces that do not receive image information after motion compensation is performed, it means that the faulty camera may have moved to another working range;

[0072] Repeat motion compensation for multiple times until all interfaces in working state can receive image information normally, and then perform normal image transmission;

[0073] When motion compensation is performed n times (n=number of cameras-1), and there are still interfaces that have not received image information, a warning message is sent to the warning device through the main control board.

[0074] By executing the above steps, the present invention can handle the situation where the interface fails to receive image information due to camera failure:

[0075] For a certain single interface, when it fails to receive image information due to a camera failure, the camera is disconnected from the connector through the first drive assembly and the second drive assembly → the next adjacent camera moves to the bottom of the interface → the camera is connected to the connector, thereby realizing automatic replacement of the faulty camera, which can effectively shorten the "blank period" of video loss due to camera failure.

[0076] For all the interfaces of this application, the next adjacent camera moves to the bottom of the interface that cannot receive image information at the beginning, indicating that the faulty camera moves to the bottom of the next adjacent interface; at this time, if the interface is not in the working range, the entire device works normally, but if the interface is also in the working range, although the problem of the first interface not receiving image information is solved, the second interface will change from being able to receive image information to not receiving image information due to this operation; therefore, it is necessary to repeatedly rotate the position of the camera to ensure that the faulty camera must be connected to the interface in the non-working range, which is also convenient for later maintenance personnel (directly inspect and replace the interface in the non-working range).

[0077] When there are multiple faulty cameras at the same time, the camera performs compensatory movements n times (n = number of cameras - 1, at this time the camera has rotated one circle, and one more rotation will return to the original position). At this time, it means that it is impossible for all the faulty cameras to be in the non-working range at the same time, so a warning message is issued to prompt relevant personnel to perform manual processing.

[0078] like Fig. 9 , a multi-channel video signal processing module using the multi-channel video signal processing method, the processing module is mounted on a main control board, and the processing module includes:

[0079] A receiving module is used to receive the measurement results sent by the laser ranging sensor and send the measurement results to the comparison module;

[0080] A comparison module, used for comparing the measurement result sent by the receiving module with a preset value, and sending the comparison result to the first control module;

[0081] A first control module, used for connecting an interface where the measurement result is greater than a preset value;

[0082] An identification module, used for identifying a preset number of a connected interface and sending the identified preset number to a marking module;

[0083] A marking module, used for inserting a mark representing an interface before image information received by a certain interface;

[0084] A conversion module, used for converting the marked image information into the marked digital information;

[0085] A feedback module is used to detect whether the interface has received the image information and send the detection result to the compensation module;

[0086] A compensation module, when the detection result shows that there is a camera that has not received image information, is used to disconnect all cameras and reconnect all cameras after rotating them to a certain angle;

[0087] The counting module is used to count the number of times the compensation module runs in a working cycle. When the number of times the compensation module runs is equal to the number of cameras minus one, a working instruction is sent to the alarm module.

[0088] The alarm module sends out an alarm signal after receiving a work instruction.

[0089] In summary, the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification are within the scope covered by the patent of the present invention.

Claims

1. A multi-view camera, comprising a top seat (2) mounted on a ceiling (1), a transparent ball cover (3) being provided below the top seat (2), characterized in that: A main control board (4) connected to a bus is provided inside the top seat (2), and a plurality of interfaces (21) connected to the main control board (4) are provided on the bottom surface of the top seat (2); a plurality of cameras (5) are connected to the bottom surface of the top seat (2), and the plurality of cameras (5) are evenly arranged along a circumference and located on the same horizontal plane, and the cameras (5) are connected to connectors (51) that cooperate with the interfaces (21); an intelligent sensing component (6) connected to the main control board (4) is also provided on the top seat (2), and the intelligent sensing component (6) is used to determine whether the camera (5) is in a working range, and the main control board (4) is used to change the working state of the interface (21) connected to the camera (5) according to the determination result of the intelligent sensing component (6). state; the intelligent sensing component (6) comprises a plurality of laser distance measuring sensors arranged on the side wall of the top seat (2), the position and orientation of the laser distance measuring sensors corresponding to the camera (5); a vertical rotating shaft (22) is arranged on the bottom surface of the top seat (2) through a bearing, the lower end of the rotating shaft (22) is fixedly connected to a horizontally arranged connecting plate (23), the camera (5) is connected to the bottom surface of the connecting plate (23), the joint (51) is arranged on the top surface of the connecting plate (23) and corresponds to the position of the interface (21); the top seat (2) is also provided with a first driving component (7) for driving the rotating shaft (22) to rotate and a second driving component (8) for driving the rotating shaft (22) to move in a vertical direction.

2. The multi-view camera according to claim 1, characterized in that: The first driving assembly (7) comprises a driving motor (71) arranged in the top seat (2); a driven gear (24) is sleeved on the rotating shaft (22); an output shaft of the driving motor (71) is sleeved with a driving gear (72) meshing with the driven gear (24); and the thickness of the driven gear (24) is smaller than the thickness of the driving gear (72); The second driving assembly (8) comprises a linear motor (81) arranged in the top seat (2), the output end of the linear motor (81) is connected to the rotating shaft (22) via a bearing, the output direction of the linear motor (81) is arranged along the axial direction of the rotating shaft (22), and the stroke of the linear motor (81) is smaller than the thickness of the driving gear (72).

3. A multi-view camera according to claim 2, characterized in that: The rotating shaft (22) is a hollow shaft.

4. A method for processing multi-channel video signals based on the multi-view camera as claimed in claim 3, characterized in that: The invention comprises a transmission method, which specifically comprises the following steps: After the camera is connected to the interface, it starts working, collects image information of the corresponding working area and sends it to the main control board through the interface; The main control board converts the received image information into digital information, inserts a mark representing the interface before the digital information, and then transmits the digital information with the mark to the display device through the bus; The display device includes a device for converting digital information into image information and a plurality of display screens, and projects the image information received from different interfaces onto different display screens according to different marks.

5. A method for processing multi-channel video signals according to claim 4, characterized in that: The invention also includes a judgment method, which specifically includes the following steps: Use a laser ranging sensor to measure the distance L between the sensor and the obstacle in front of it; If L is greater than or equal to the preset value a, it means that the camera corresponding to the position of the laser ranging sensor is in the working range, and the interface connected to the camera is in working state; If L is less than the preset value a, it means that the camera corresponding to the position of the laser ranging sensor is not in the working range, and the interface connected to the camera is in a non-working state.

6. A method for processing multi-channel video signals according to claim 5, characterized in that: It also includes a motion compensation method, which specifically includes the following steps: When an interface corresponding to a certain working area on the top seat does not receive image information, it means that the camera corresponding to the working area may be faulty; The second driving component is used to disconnect all cameras, and then the first driving component is used to control the connecting plate to rotate a certain angle so that the moving joint of an adjacent camera is aligned with the interface, and then the second driving component is used again to connect all cameras.

7. A method for processing multi-channel video signals according to claim 6, characterized in that: It also includes an alarm method, which specifically includes the following steps: If there are still interfaces that do not receive image information after motion compensation is performed, it means that the faulty camera may have moved to another working range; Repeat motion compensation several times until all interfaces in working state can receive image information normally; When there are still interfaces that have not received image information after performing motion compensation n times, a warning message is sent to the warning device through the main control board, where n=the number of cameras-1.

8. A multi-channel video signal processing module using the multi-channel video signal processing method according to claim 7, characterized in that: The processing module is mounted on the main control board, and the processing module includes: A receiving module is used to receive the measurement results sent by the laser ranging sensor and send the measurement results to the comparison module; A comparison module, used for comparing the measurement result sent by the receiving module with a preset value, and sending the comparison result to the first control module; A first control module, used for connecting an interface where the measurement result is greater than a preset value; An identification module, used for identifying a preset number of a connected interface and sending the identified preset number to a marking module; A marking module, used for inserting a mark representing an interface before image information received by a certain interface; A conversion module, used for converting the marked image information into the marked digital information; A feedback module is used to detect whether the interface has received the image information and send the detection result to the compensation module; A compensation module, when the detection result shows that there is a camera that has not received image information, is used to disconnect all cameras and reconnect all cameras after rotating them to a certain angle; The counting module is used to count the number of times the compensation module runs in a working cycle. When the number of times the compensation module runs is equal to the number of cameras minus one, a working instruction is sent to the alarm module. The alarm module sends out an alarm signal after receiving a work instruction.

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