Device for correcting field of view of double-field-of-view camera
By using the use of ordinary cameras and AHL encoding/decoding chips, the problem of high cost scope schemes in existing technologies has been solved, and low -cost dual -field range corrections are realized, and the scope of application is expanded.
Patent Information
- Application Number
- CN202323430259.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-15
AI Technical Summary
Existing cameras have high cost for dual-field range solutions, especially fisheye lenses and ISPs with fisheye correction processing capabilities.
Provide a device that provides a field of view of the dual -field camera, adopts ordinary cameras and AHL encoding/decoding chips, and through video collection modules, communication modules, and processing modules to achieve video cuts and zooming, generate the first vision range and/or second second. Video of vision range.
The cost is reduced, the cost of using ordinary cameras is lower than the fish -eye lens, and the application range is wider, which avoids the difficulty of choice of lens perspective, and achieves effective correction of the dual -view range.
Smart Images
Figure CN222423798U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle-mounted exterior mirrors, in particular to a device for correcting the visual field of a dual-viewing camera. Background Art
[0002] There are only two ways for existing systems on the market to achieve two or more fields of view:
[0003] The first method is to equip the camera with a rotating mechanism, which we call a dual-view camera. The maximum rotation angle of this rotating mechanism is 90 degrees, and it is designed with two adjustable stall positions. According to different usage conditions, it can be rotated to the required position to obtain the corresponding field of view.
[0004] The second method is, of course, to equip the sensor with a fisheye lens, perform fisheye correction through ISP, and cut and output according to application conditions. This can not only achieve dual-field output, but also multi-field output.
[0005] However, the cost of using the second method is relatively high. The cost of fisheye lenses is relatively high, the cost of ISPs with fisheye correction processing capabilities is also high, and there are relatively few ISPs to choose from. Summary of the invention
[0006] The purpose of the utility model is to provide a device for calibrating the field of view of a dual-field camera, which aims to solve the technical problem of high cost of the existing dual-field of view solution of the camera.
[0007] In order to achieve the above object, the solution provided by the utility model is:
[0008] A device for calibrating the field of view of a dual-field camera, applied in transportation vehicles, comprising:
[0009] A camera module, comprising a video acquisition module and a first communication module, wherein the video acquisition module and the first communication module are electrically connected;
[0010] The display module includes a second communication module, a processing module and a display screen. The first communication module is communicatively connected with the second communication module, and the second communication module, the processing module and the display screen are electrically connected in sequence. The video collected by the acquisition module is transmitted to the second communication module through the first communication module. After being processed by the processing module, the video forms a video of the first field of view or the second field of view, and is displayed on the display screen.
[0011] Optionally, the first communication module is an AHL encoding chip, and the first communication module is used to convert the video collected by the collection module into an analog signal.
[0012] Optionally, the second communication module is an AHL decoding chip, and the second communication module is used to reconvert the analog signal into video.
[0013] Optionally, the camera module also includes a detection drive module, a power module, a control module, a power cord and a first interface. The video acquisition module, the power module, the control module, the detection drive module, the first communication module and the first interface are electrically connected in sequence. The first communication module establishes a communication connection with the second communication module through the first interface. One end of the power cord is connected between the video acquisition module and the power module, and the other end is connected between the detection drive module and the first communication module. When the detection drive module detects that a signal of reaching a stall position is reached, the motor is instructed to stop rotating. When the control module receives a reverse instruction, the control module controls the drive module to drive the video acquisition module to flip from the first position to the second position or from the second position to the first position.
[0014] Optionally, the display module also includes a button, which generates a trigger signal when the button is pressed. When the control module receives the trigger signal, the control module controls the driving module to drive the video acquisition module to flip from the first position to the second position, or from the second position to the first position.
[0015] Optionally, the transportation vehicle includes a front and a carriage, the front and the carriage are connected, and the camera module is arranged on the carriage and located away from the front; when the video acquisition module is in the first position, the shooting range of the video acquisition module is a first viewing angle range, and when the video acquisition module is in the second position, the shooting range of the video acquisition module is a second viewing angle range.
[0016] Optionally, the display module also includes a data storage module, a second interface, a keyboard and an external trigger IO interface. The data storage module is electrically connected to the processing module, and the system data processed by the processing module is stored in the data storage module. The second interface is connected to the first interface, and the external trigger IO interface is electrically connected between the second interface and the processing module. The external trigger IO interface is connected to the reverse gear signal of the vehicle. The processing module sends a reverse gear instruction to the camera module through the second interface based on detecting whether the external trigger IO interface has a reverse gear signal or a reverse gear instruction triggered by the keyboard. The keyboard is electrically connected to the processing module.
[0017] Optionally, the picture captured by the video acquisition module is the original video, and the processing module crops the original video and adjusts the resolution of the original video to match the resolution of the display screen.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] The utility model provides a device for correcting the field of view of a dual-field camera. The original video captured by the video acquisition module is transmitted to the second communication module through the first communication module, and the original video is cropped and scaled by the processing module to output the processed video of the first field of view and / or the second field of view. The ordinary camera used in the video acquisition module of the present application is low in cost compared to the fisheye lens, and the ordinary camera has a wider application range, which can avoid the difficulty of lens viewing angle selection to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0021] Figure 1 It is a schematic diagram of a device for calibrating the field of view of a dual-field camera provided by an embodiment of the utility model;
[0022] Figure 2 is a schematic diagram of a display module provided by an embodiment of the utility model;
[0023] Figure 3 It is a schematic diagram of a transportation vehicle provided by an embodiment of the utility model.
[0024] Description of Figure Numbers:
[0025] 100. Device for correcting the field of view of a dual-view camera; 110. Camera module; 111. Video acquisition module; 112. First communication module; 113. Detection drive module; 114. Power module; 115. Control module; 116. Power cord; 117. First interface; 120. Display module; 121. Second communication module; 122. Processing module; 123. Display screen; 124. Data storage module; 125. Second interface; 126. Keyboard; 127. External trigger IO interface;
[0026] 200. Transportation vehicle; 210. Front of the vehicle; 220. Carriage. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0029] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.
[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0031] like Figure 1 , Figure 2 , Figure 3 As shown, a device 100 for correcting the field of view of a dual-field camera is applied to a transportation vehicle 200, and includes a camera module 110 and a display module 120. The camera module 110 includes a video acquisition module 111 and a first communication module 112, and the video acquisition module 111 and the first communication module 112 are electrically connected; the display module 120 includes a second communication module 121, a processing module 122 and a display screen 123, the first communication module 112 is connected to the second communication module 121 for communication, and the second communication module 121, the processing module 122 and the display screen 123 are electrically connected in sequence; the video collected by the acquisition module is transmitted to the second communication module 121 through the first communication module 112, and the video is processed by the processing module 122 to form a video of the first field of view or the second field of view, and is displayed on the display screen 123.
[0032] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model provides a device 100 for correcting the field of view of a dual-field camera. The original video captured by the video acquisition module 111 is transmitted to the second communication module 121 through the first communication module 112, and the original video is cropped and scaled by the processing module 122 to output the processed video of the first field of view and / or the second field of view. The ordinary camera used in the video acquisition module 111 of the present application is low in cost compared to the fisheye lens, and the ordinary camera has a wider application range, which can avoid the difficulty of lens viewing angle selection to a certain extent.
[0033] like Figure 1 , Figure 2 , Figure 3 As shown, as an implementation, the first communication module 112 is an AHL encoding chip, and the first communication module 112 is used to convert the video collected by the collection module into an analog signal. Exemplarily, the AHL encoding chip is used to convert the video signal into an analog signal according to the AHL protocol.
[0034] like Figure 1 , Figure 2 , Figure 3 As shown, as an implementation, the second communication module 121 is an AHL decoding chip, and the second communication module 121 is used to reconvert the analog signal into a video. Exemplarily, the AHL decoding chip is used to receive a camera signal of the AHL protocol and decode the video signal according to the AHL protocol.
[0035] like Figure 1 , Figure 2 , Figure 3As shown, as an embodiment, the camera module 110 also includes a detection drive module 113, a power module 114, a control module 115, a power cord 116 and a first interface 117. The video acquisition module 111, the power module 114, the control module 115, the detection drive module 113, the first communication module 112 and the first interface 117 are electrically connected in sequence. The first communication module 112 establishes a communication connection with the second communication module 121 through the first interface 117. One end of the power cord 116 is connected between the video acquisition module 111 and the power module 114, and the other end is connected between the detection drive module 113 and the first communication module 112. When the detection drive module 113 detects that a signal of reaching a stall position is reached, the motor is instructed to stop rotating. When the control module 115 receives a reverse instruction, the controlled module 115 controls the drive module to drive the video acquisition module 111 to flip from the first position to the second position or from the second position to the first position. Exemplarily, a BT656 communication connection is established between the video acquisition module 111 and the first communication module 112, and a video signal is transmitted through BT656. The control module 115 controls the video acquisition module 111 and the first communication module 112 through an I2C control signal; the power module 114 is used to provide power, and supplies power to the video acquisition module 111, the detection drive module 113, the control module 115 and the first communication module 112 respectively. When the truck is moving forward normally, the video acquisition module 111 is located at the first position, that is, the first viewing angle range, and when the truck is in reverse gear, the video acquisition module 111 is located at the second position, that is, the second viewing angle range. This is because the truck is different when it is driving normally and when it is reversing. The workflow is that the display module 120 detects a reverse gear signal, sends the reverse gear signal to the camera module 110 through AHL, and the MCU instructs the motor to rotate. At the same time, the motor power supply current is detected, and the rotation stops when it reaches the specified value. It can be understood that when rotating, the display module 120 detects that there is no reverse gear signal, sends the reverse gear signal to the camera module 110 through AHL, and the MCU instructs the motor to rotate. At the same time, the motor power supply current is detected, and the rotation stops when it reaches the specified value. It should be noted that the first viewing angle range and the second viewing angle range mentioned here are different from the first viewing angle range and the second viewing angle range mentioned above. The first viewing angle range and the second viewing angle range are caused by changing the position of the video acquisition module 111, thereby causing different shooting positions and angles. The first viewing angle range and the second viewing angle range are obtained by processing the video captured by the video acquisition module 111 through cropping and scaling operations to obtain videos that match the display screen 123 and have different viewing angles.
[0036] like Figure 1 , Figure 2 , Figure 3As shown, as an implementation mode, the display module 120 also includes a button (not shown in the figure), and a trigger signal is generated when the button is pressed. When the control module 115 receives the trigger signal, the control module 115 controls the drive module 113 to drive the video acquisition module 111 to flip from the first position to the second position or from the second position to the first position. Exemplarily, the drive module 113 can be a drive motor to drive the video acquisition module 111 to flip. The button is used for manual triggering. It should be noted that when the truck is detected to be in reverse gear, the control module 115 controls the drive video acquisition module 111 to flip, and the user can force the video acquisition module 111 to flip through the button.
[0037] like Figure 1 , Figure 2 , Figure 3 As shown, as an embodiment, the transportation vehicle 200 includes a front 210 and a carriage 220, the front 210 and the carriage 220 are connected, the camera module 110 is arranged on the carriage 220 and is located away from the front 210; when the video acquisition module 111 is in the first position, the shooting range of the video acquisition module 111 is the first viewing angle range, and when the video acquisition module 111 is in the second position, the shooting range of the video acquisition module 111 is the second viewing angle range.
[0038] like Figure 1 , Figure 2 , Figure 3 As shown, as an implementation mode, the display module 120 further includes a data storage module 124, a second interface 125, a keyboard 126 and an external trigger IO interface 127. The data storage module 124 is electrically connected to the processing module 122. The system data processed by the processing module 122 is stored in the data storage module 124. The second interface 125 is connected to the first interface. The external trigger IO interface 127 is electrically connected between the second interface 125 and the processing module 122. The external trigger IO interface 127 is connected to the reverse gear signal of the vehicle. The processing module 122 sends a reverse gear instruction to the camera module 110 through the second interface 125 according to the detection of whether the external trigger IO interface 127 has a reverse gear signal or a reverse gear instruction triggered by the keyboard 126. The keyboard 126 is electrically connected to the processing module 122. Exemplarily, the first interface and the second interface 125 are actually physical interfaces, equivalent to a plug and a socket, to realize the electrical connection between the camera module 110 and the display module 120. The keyboard 126 is used to input control instructions to the processing module 122, the external trigger IO interface 127 is used to detect the reverse gear position and realize functions such as automatic switching between the first perspective and the second perspective, and the data storage module 124 is used to store system data and image processing data.
[0039] like Figure 1 , Figure 2 , Figure 3As shown, as an implementation method, the picture taken by the video acquisition module 111 is the original video, and the processing module 122 crops the original video and adjusts the resolution of the original video to match the resolution of the display screen 123. When the resolution of the video acquisition module 111 is smaller than the resolution of the display screen 123, the basic principle of the processing module 122 is that the original resolution sent by the video acquisition module 111 belongs to the maximum viewing angle range, which is reserved for the position that requires the maximum viewing angle (a certain position of the dual-view camera); another position requires a smaller viewing angle, so the input video is cropped, the center part is taken, and then it is enlarged to the screen for display, which can obtain a display effect with a small viewing angle.
[0040] The following is an example. The output resolution of the video acquisition module 111 is 640 x 480, and the resolution of the display screen 123 is 1024 x 600. In order to ensure that the display ratio is not deformed, it is necessary to cut 640 x 375 and enlarge it to a 1024 x 600 screen for display; in order to ensure that the ratio is not deformed and have a larger display range, the final cut is 640 x 400 and put it on a 1024 x 600 screen for display. The small field of view is 0.8 times the large field of view. The large field of view takes 640 x 400, so the small field of view is the center crop of 512 x 320, and then enlarged to a 1024 x 768 screen for display. The resolution of this camera is smaller than the resolution of the display screen 123. Both the large field of view and the small field of view adopt an enlarged display processing method. If the magnification is too high, the display quality will decrease. Therefore, whether the small field of view is 0.8 or smaller, it needs to be actually selected.
[0041] When the resolution of the video acquisition module 111 is higher than the resolution of the screen, the basic principle of the processing module 122 is that the original resolution sent by the video acquisition module 111 belongs to the maximum viewing angle range, which is reserved for the position where the maximum viewing angle is required (a certain position of the dual-view camera) for reduced display; for another position that requires a smaller viewing angle, the center part is taken according to the resolution of the display screen 123 for point-to-point display (best display effect); or the center part can be cropped smaller and then enlarged to the screen for display, both of which can obtain a display effect with a small viewing angle.
[0042] The following is an example. The output resolution of the video acquisition module 111 is 1280 x 720, and the resolution of the display screen 123 is 1024 x 600. The aspect ratio of 1280 x 720 is similar to that of 1024 x 600, so no cropping is performed, and all are reduced to a 1024 x 600 screen for display. There are two ways to process a small field of view. One is to take 1024 x 600 from the middle of the 1280 x 720 image and put it on the display screen 123 for point-to-point display. This method has the best display clarity for a small field of view. Alternatively, take an image smaller than 1024 x 600 from the middle according to the magnification, and then enlarge it to a 1024 x 600 screen for display. For example, at a magnification of 0.5, take 640 x 360 from the center of 1280 x 720 and enlarge it to a 1024 x 600 screen for display.
[0043] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A device for calibrating the field of view of a dual-view camera, used in transportation vehicles, characterized in that: include: A camera module, comprising a video acquisition module and a first communication module, wherein the video acquisition module and the first communication module are electrically connected; The display module includes a second communication module, a processing module and a display screen. The first communication module is communicatively connected with the second communication module, and the second communication module, the processing module and the display screen are electrically connected in sequence. The video collected by the acquisition module is transmitted to the second communication module through the first communication module. After being processed by the processing module, the video forms a video of the first field of view or the second field of view, and is displayed on the display screen.
2. The device for calibrating the field of view of a dual-view camera according to claim 1, characterized in that: The first communication module is an AHL encoding chip, and the first communication module is used to convert the video collected by the collection module into an analog signal.
3. The device for calibrating the field of view of a dual-view camera according to claim 2, characterized in that: The second communication module is an AHL decoding chip, and the second communication module is used to reconvert the analog signal into video.
4. The device for calibrating the field of view of a dual-view camera according to claim 1, characterized in that: The camera module also includes a detection drive module, a power module, a control module, a power line and a first interface. The video acquisition module, the power module, the control module, the detection drive module, the first communication module and the first interface are electrically connected in sequence. The first communication module establishes a communication connection with the second communication module through the first interface. One end of the power line is connected between the video acquisition module and the power module, and the other end is connected between the detection drive module and the first communication module. When the detection drive module detects that a signal of reaching a stall position is reached, the motor is instructed to stop rotating. When the control module receives a reverse instruction, the control module controls the drive module to drive the video acquisition module to flip from the first position to the second position or from the second position to the first position.
5. The device for calibrating the field of view of a dual-view camera according to claim 4, characterized in that: The display module also includes a button, which generates a trigger signal when pressed. When the control module receives the trigger signal, the control module controls the driving module to drive the video acquisition module to flip from the first position to the second position or from the second position to the first position.
6. The device for calibrating the field of view of a dual-view camera according to claim 5, characterized in that: The transportation vehicle includes a front part and a carriage, the front part and the carriage are connected, the camera module is arranged on the carriage and is located away from the front part; when the video acquisition module is in the first position, the shooting range of the video acquisition module is a first viewing angle range, and when the video acquisition module is in the second position, the shooting range of the video acquisition module is a second viewing angle range.
7. The device for calibrating the field of view of a dual-field camera according to claim 6, characterized in that: The display module also includes a data storage module, a second interface, a keyboard and an external trigger IO interface. The data storage module is electrically connected to the processing module, and the system data processed by the processing module is stored in the data storage module. The second interface is connected to the first interface, and the external trigger IO interface is electrically connected between the second interface and the processing module. The external trigger IO interface is connected to the reverse gear signal of the vehicle. The processing module sends a reverse gear instruction to the camera module through the second interface according to detecting whether the external trigger IO interface has a reverse gear signal or a reverse gear instruction triggered by the keyboard. The keyboard is electrically connected to the processing module.
8. The device for calibrating the field of view of a dual-field camera according to any one of claims 1 to 7, characterized in that: The picture taken by the video acquisition module is the original video, and the processing module cuts the pictures of different sizes and enlarges or reduces the original video to match the resolution of the display screen.